Articles | Volume 17, issue 1
https://doi.org/10.5194/cp-17-491-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-491-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Feb 2021
Research article |
| 23 Feb 2021
| 23 Feb 2021
Atmospheric iron supply and marine productivity in the glacial North Pacific Ocean
François Burgay
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Via Torino 155, 30170 Venice, Italy
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Jacopo Gabrieli
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Giulio Cozzi
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Clara Turetta
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Paul Vallelonga
Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, Copenhagen N2200, Denmark
Oceans Graduate School, University of Western Australia, 64 Fairway, Crawley, WA 6009, Australia
Carlo Barbante
Institute of Polar Sciences, National Research Council, Via Torino
155, 30170 Venice, Italy
Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Via Torino 155, 30170 Venice, Italy
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This preprint is open for discussion and under review for The Cryosphere (TC).
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Glaciers preserve organic compounds from atmospheric aerosols, which can serve as markers for emission sources. Most studies overlook the enantiomers of chiral compounds. We developed a two-dimensional liquid chromatography method to determine the chiral ratios of the monoterpene oxidation products cis-pinic acid and cis-pinonic acid in ice-core samples. Applied to samples from the Belukha Glacier (1870–1970 CE), the method revealed fluctuating chiral ratios for the analytes.
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Andrea Spolaor, Federico Scoto, Catherine Larose, Elena Barbaro, Francois Burgay, Mats P. Bjorkman, David Cappelletti, Federico Dallo, Fabrizio de Blasi, Dmitry Divine, Giuliano Dreossi, Jacopo Gabrieli, Elisabeth Isaksson, Jack Kohler, Tonu Martma, Louise S. Schmidt, Thomas V. Schuler, Barbara Stenni, Clara Turetta, Bartłomiej Luks, Mathieu Casado, and Jean-Charles Gallet
The Cryosphere, 18, 307–320, https://doi.org/10.5194/tc-18-307-2024, https://doi.org/10.5194/tc-18-307-2024, 2024
Short summary
Short summary
We evaluate the impact of the increased snowmelt on the preservation of the oxygen isotope (δ18O) signal in firn records recovered from the top of the Holtedahlfonna ice field located in the Svalbard archipelago. Thanks to a multidisciplinary approach we demonstrate a progressive deterioration of the isotope signal in the firn core. We link the degradation of the δ18O signal to the increased occurrence and intensity of melt events associated with the rapid warming occurring in the archipelago.
Tobias Erhardt, Camilla Marie Jensen, Florian Adolphi, Helle Astrid Kjær, Remi Dallmayr, Birthe Twarloh, Melanie Behrens, Motohiro Hirabayashi, Kaori Fukuda, Jun Ogata, François Burgay, Federico Scoto, Ilaria Crotti, Azzurra Spagnesi, Niccoló Maffezzoli, Delia Segato, Chiara Paleari, Florian Mekhaldi, Raimund Muscheler, Sophie Darfeuil, and Hubertus Fischer
Earth Syst. Sci. Data, 15, 5079–5091, https://doi.org/10.5194/essd-15-5079-2023, https://doi.org/10.5194/essd-15-5079-2023, 2023
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The presented paper provides a 3.8 kyr long dataset of aerosol concentrations from the East Greenland Ice coring Project (EGRIP) ice core. The data consists of 1 mm depth-resolution profiles of calcium, sodium, ammonium, nitrate, and electrolytic conductivity as well as decadal averages of these profiles. Alongside the data a detailed description of the measurement setup as well as a discussion of the uncertainties are given.
Azzurra Spagnesi, Pascal Bohleber, Elena Barbaro, Matteo Feltracco, Fabrizio De Blasi, Giuliano Dreossi, Martin Stocker-Waldhuber, Daniela Festi, Jacopo Gabrieli, Andrea Gambaro, Andrea Fischer, and Carlo Barbante
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Preprint archived
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Nicolas Stoll, Julien Westhoff, Pascal Bohleber, Anders Svensson, Dorthe Dahl-Jensen, Carlo Barbante, and Ilka Weikusat
The Cryosphere, 17, 2021–2043, https://doi.org/10.5194/tc-17-2021-2023, https://doi.org/10.5194/tc-17-2021-2023, 2023
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Impurities in polar ice play a role regarding its climate signal and internal deformation. We bridge different scales using different methods to investigate ice from the Last Glacial Period derived from the EGRIP ice core in Greenland. We characterise different types of cloudy bands, i.e. frequently occurring milky layers in the ice, and analyse their chemistry with Raman spectroscopy and 2D imaging. We derive new insights into impurity localisation and deposition conditions.
Simone Ventisette, Samuele Baldini, Claudio Artoni, Silvia Becagli, Laura Caiazzo, Barbara Delmonte, Massimo Frezzotti, Raffaello Nardin, Joel Savarino, Mirko Severi, Andrea Spolaor, Barbara Stenni, and Rita Traversi
EGUsphere, https://doi.org/10.5194/egusphere-2023-393, https://doi.org/10.5194/egusphere-2023-393, 2023
Preprint archived
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The Cryosphere, 17, 539–565, https://doi.org/10.5194/tc-17-539-2023, https://doi.org/10.5194/tc-17-539-2023, 2023
Short summary
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François Burgay, Rafael Pedro Fernández, Delia Segato, Clara Turetta, Christopher S. Blaszczak-Boxe, Rachael H. Rhodes, Claudio Scarchilli, Virginia Ciardini, Carlo Barbante, Alfonso Saiz-Lopez, and Andrea Spolaor
The Cryosphere, 17, 391–405, https://doi.org/10.5194/tc-17-391-2023, https://doi.org/10.5194/tc-17-391-2023, 2023
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The paper presents the first ice-core record of bromine (Br) in the Antarctic plateau. By the observation of the ice core and the application of atmospheric chemical models, we investigate the behaviour of bromine after its deposition into the snowpack, with interest in the effect of UV radiation change connected to the formation of the ozone hole, the role of volcanic deposition, and the possible use of Br to reconstruct past sea ice changes from ice core collect in the inner Antarctic plateau.
Helle Astrid Kjær, Patrick Zens, Samuel Black, Kasper Holst Lund, Anders Svensson, and Paul Vallelonga
Clim. Past, 18, 2211–2230, https://doi.org/10.5194/cp-18-2211-2022, https://doi.org/10.5194/cp-18-2211-2022, 2022
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Six shallow cores from northern Greenland spanning a distance of 426 km were retrieved during a traversal in 2015. We identify several recent acid horizons associated with Icelandic eruptions and eruptions in the Barents Sea region and obtain a robust forest fire proxy associated primarily with Canadian forest fires. We also observe an increase in the large dust particle fluxes that we attribute to an activation of Greenland local sources in recent years (1998–2015).
Julien Westhoff, Giulia Sinnl, Anders Svensson, Johannes Freitag, Helle Astrid Kjær, Paul Vallelonga, Bo Vinther, Sepp Kipfstuhl, Dorthe Dahl-Jensen, and Ilka Weikusat
Clim. Past, 18, 1011–1034, https://doi.org/10.5194/cp-18-1011-2022, https://doi.org/10.5194/cp-18-1011-2022, 2022
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We present a melt event record from an ice core from central Greenland, which covers the past 10 000 years. Our record displays warm summer events, which can be used to enhance our understanding of the past climate. We compare our data to anomalies in tree ring width, which also represents summer temperatures, and find a good correlation. Furthermore, we investigate an outstandingly warm event in the year 986 AD or 991 AD, which has not been analyzed before.
Tobias Erhardt, Matthias Bigler, Urs Federer, Gideon Gfeller, Daiana Leuenberger, Olivia Stowasser, Regine Röthlisberger, Simon Schüpbach, Urs Ruth, Birthe Twarloh, Anna Wegner, Kumiko Goto-Azuma, Takayuki Kuramoto, Helle A. Kjær, Paul T. Vallelonga, Marie-Louise Siggaard-Andersen, Margareta E. Hansson, Ailsa K. Benton, Louise G. Fleet, Rob Mulvaney, Elizabeth R. Thomas, Nerilie Abram, Thomas F. Stocker, and Hubertus Fischer
Earth Syst. Sci. Data, 14, 1215–1231, https://doi.org/10.5194/essd-14-1215-2022, https://doi.org/10.5194/essd-14-1215-2022, 2022
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The datasets presented alongside this manuscript contain high-resolution concentration measurements of chemical impurities in deep ice cores, NGRIP and NEEM, from the Greenland ice sheet. The impurities originate from the deposition of aerosols to the surface of the ice sheet and are influenced by source, transport and deposition processes. Together, these records contain detailed, multi-parameter records of past climate variability over the last glacial period.
Paolo Gabrielli, Theo Manuel Jenk, Michele Bertó, Giuliano Dreossi, Daniela Festi, Werner Kofler, Mai Winstrup, Klaus Oeggl, Margit Schwikowski, Barbara Stenni, and Carlo Barbante
Clim. Past Discuss., https://doi.org/10.5194/cp-2022-20, https://doi.org/10.5194/cp-2022-20, 2022
Revised manuscript not accepted
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We present a methodology that reduces the chronological uncertainty of an Alpine ice core record from the glacier Alto dell’Ortles, Italy. This chronology will allow the constraint of the Holocene climatic and environmental histories emerging from this archive of Central Europe. This method will allow to obtain accurate chronologies also from other ice cores from-low latitude/high-altitude glaciers that typically suffer from larger dating uncertainties compared with well dated polar records.
Raffaello Nardin, Mirko Severi, Alessandra Amore, Silvia Becagli, Francois Burgay, Laura Caiazzo, Virginia Ciardini, Giuliano Dreossi, Massimo Frezzotti, Sang-Bum Hong, Ishaq Khan, Bianca Maria Narcisi, Marco Proposito, Claudio Scarchilli, Enricomaria Selmo, Andrea Spolaor, Barbara Stenni, and Rita Traversi
Clim. Past, 17, 2073–2089, https://doi.org/10.5194/cp-17-2073-2021, https://doi.org/10.5194/cp-17-2073-2021, 2021
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The first step to exploit all the potential information buried in ice cores is to produce a reliable age scale. Based on chemical and isotopic records from the 197 m Antarctic GV7(B) ice core, accurate dating was achieved and showed that the archive spans roughly the last 830 years. The relatively high accumulation rate allowed us to use the non-sea-salt sulfate seasonal pattern to count annual layers. The accumulation rate reconstruction exhibited a slight increase since the 18th century.
Federico Dallo, Daniele Zannoni, Jacopo Gabrieli, Paolo Cristofanelli, Francescopiero Calzolari, Fabrizio de Blasi, Andrea Spolaor, Dario Battistel, Rachele Lodi, Warren Raymond Lee Cairns, Ann Mari Fjæraa, Paolo Bonasoni, and Carlo Barbante
Atmos. Meas. Tech., 14, 6005–6021, https://doi.org/10.5194/amt-14-6005-2021, https://doi.org/10.5194/amt-14-6005-2021, 2021
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Our work showed how the adoption of low-cost technology could be useful in environmental research and monitoring. We focused our work on tropospheric ozone, but we also showed how to make a general purpose low-cost sensing system which may be adapted and optimised to be used in many other case studies. Given the importance of providing quality data, we put a lot of effort in the sensor's calibration, and we believe that our results show how to exploit the potential of the low-cost technology.
Camilla K. Crockart, Tessa R. Vance, Alexander D. Fraser, Nerilie J. Abram, Alison S. Criscitiello, Mark A. J. Curran, Vincent Favier, Ailie J. E. Gallant, Christoph Kittel, Helle A. Kjær, Andrew R. Klekociuk, Lenneke M. Jong, Andrew D. Moy, Christopher T. Plummer, Paul T. Vallelonga, Jonathan Wille, and Lingwei Zhang
Clim. Past, 17, 1795–1818, https://doi.org/10.5194/cp-17-1795-2021, https://doi.org/10.5194/cp-17-1795-2021, 2021
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We present preliminary analyses of the annual sea salt concentrations and snowfall accumulation in a new East Antarctic ice core, Mount Brown South. We compare this record with an updated Law Dome (Dome Summit South site) ice core record over the period 1975–2016. The Mount Brown South record preserves a stronger and inverse signal for the El Niño–Southern Oscillation (in austral winter and spring) compared to the Law Dome record (in summer).
Michele Bertò, David Cappelletti, Elena Barbaro, Cristiano Varin, Jean-Charles Gallet, Krzysztof Markowicz, Anna Rozwadowska, Mauro Mazzola, Stefano Crocchianti, Luisa Poto, Paolo Laj, Carlo Barbante, and Andrea Spolaor
Atmos. Chem. Phys., 21, 12479–12493, https://doi.org/10.5194/acp-21-12479-2021, https://doi.org/10.5194/acp-21-12479-2021, 2021
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We present the daily and seasonal variability in black carbon (BC) in surface snow inferred from two specific experiments based on the hourly and daily time resolution sampling during the Arctic spring in Svalbard. These unique data sets give us, for the first time, the opportunity to evaluate the associations between the observed surface snow BC mass concentration and a set of predictors corresponding to the considered meteorological and snow physico-chemical parameters.
Helle Astrid Kjær, Lisa Lolk Hauge, Marius Simonsen, Zurine Yoldi, Iben Koldtoft, Maria Hörhold, Johannes Freitag, Sepp Kipfstuhl, Anders Svensson, and Paul Vallelonga
The Cryosphere, 15, 3719–3730, https://doi.org/10.5194/tc-15-3719-2021, https://doi.org/10.5194/tc-15-3719-2021, 2021
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Ice core analyses are often done in home laboratories after costly transport of samples from the field. This limits the amount of sample that can be analysed.
Here, we present the first truly field-portable continuous flow analysis (CFA) system for the analysis of impurities in snow, firn and ice cores while still in the field: the lightweight in situ analysis (LISA) box.
LISA is demonstrated in Greenland to reconstruct accumulation, conductivity and peroxide in snow cores.
Delia Segato, Maria Del Carmen Villoslada Hidalgo, Ross Edwards, Elena Barbaro, Paul Vallelonga, Helle Astrid Kjær, Marius Simonsen, Bo Vinther, Niccolò Maffezzoli, Roberta Zangrando, Clara Turetta, Dario Battistel, Orri Vésteinsson, Carlo Barbante, and Andrea Spolaor
Clim. Past, 17, 1533–1545, https://doi.org/10.5194/cp-17-1533-2021, https://doi.org/10.5194/cp-17-1533-2021, 2021
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Human influence on fire regimes in the past is poorly understood, especially at high latitudes. We present 5 kyr of fire proxies levoglucosan, black carbon, and ammonium in the RECAP ice core in Greenland and reconstruct for the first time the fire regime in the high North Atlantic region, comprising coastal east Greenland and Iceland. Climate is the main driver of the fire regime, but at 1.1 kyr BP a contribution may be made by the deforestation resulting from Viking colonization of Iceland.
Elena Barbaro, Krystyna Koziol, Mats P. Björkman, Carmen P. Vega, Christian Zdanowicz, Tonu Martma, Jean-Charles Gallet, Daniel Kępski, Catherine Larose, Bartłomiej Luks, Florian Tolle, Thomas V. Schuler, Aleksander Uszczyk, and Andrea Spolaor
Atmos. Chem. Phys., 21, 3163–3180, https://doi.org/10.5194/acp-21-3163-2021, https://doi.org/10.5194/acp-21-3163-2021, 2021
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This paper shows the most comprehensive seasonal snow chemistry survey to date, carried out in April 2016 across 22 sites on 7 glaciers across Svalbard. The dataset consists of the concentration, mass loading, spatial and altitudinal distribution of major ion species (Ca2+, K+,
Na2+, Mg2+,
NH4+, SO42−,
Br−, Cl− and
NO3−), together with its stable oxygen and hydrogen isotope composition (δ18O and
δ2H) in the snowpack. This study was part of the larger Community Coordinated Snow Study in Svalbard.
Christian Zdanowicz, Jean-Charles Gallet, Mats P. Björkman, Catherine Larose, Thomas Schuler, Bartłomiej Luks, Krystyna Koziol, Andrea Spolaor, Elena Barbaro, Tõnu Martma, Ward van Pelt, Ulla Wideqvist, and Johan Ström
Atmos. Chem. Phys., 21, 3035–3057, https://doi.org/10.5194/acp-21-3035-2021, https://doi.org/10.5194/acp-21-3035-2021, 2021
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Black carbon (BC) aerosols are soot-like particles which, when transported to the Arctic, darken snow surfaces, thus indirectly affecting climate. Information on BC in Arctic snow is needed to measure their impact and monitor the efficacy of pollution-reduction policies. This paper presents a large new set of BC measurements in snow in Svalbard collected between 2007 and 2018. It describes how BC in snow varies across the archipelago and explores some factors controlling these variations.
Helle Astrid Kjær, Patrick Zens, Ross Edwards, Martin Olesen, Ruth Mottram, Gabriel Lewis, Christian Terkelsen Holme, Samuel Black, Kasper Holst Lund, Mikkel Schmidt, Dorthe Dahl-Jensen, Bo Vinther, Anders Svensson, Nanna Karlsson, Jason E. Box, Sepp Kipfstuhl, and Paul Vallelonga
The Cryosphere Discuss., https://doi.org/10.5194/tc-2020-337, https://doi.org/10.5194/tc-2020-337, 2021
Manuscript not accepted for further review
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We have reconstructed accumulation in 6 firn cores and 8 snow cores in Northern Greenland and compared with a regional Climate model over Greenland. We find the model underestimate precipitation especially in north-eastern part of the ice cap- an important finding if aiming to reconstruct surface mass balance.
Temperatures at 10 meters depth at 6 sites in Greenland were also determined and show a significant warming since the 1990's of 0.9 to 2.5 °C.
Christine S. Hvidberg, Aslak Grinsted, Dorthe Dahl-Jensen, Shfaqat Abbas Khan, Anders Kusk, Jonas Kvist Andersen, Niklas Neckel, Anne Solgaard, Nanna B. Karlsson, Helle Astrid Kjær, and Paul Vallelonga
The Cryosphere, 14, 3487–3502, https://doi.org/10.5194/tc-14-3487-2020, https://doi.org/10.5194/tc-14-3487-2020, 2020
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The Northeast Greenland Ice Stream (NEGIS) extends around 600 km from its onset in the interior of Greenland to the coast. Several maps of surface velocity and topography in Greenland exist, but accuracy is limited due to the lack of validation data. Here we present results from a 5-year GPS survey in an interior section of NEGIS. We use the data to assess a list of satellite-derived ice velocity and surface elevation products and discuss the implications for the ice stream flow in the area.
James E. Lee, Edward J. Brook, Nancy A. N. Bertler, Christo Buizert, Troy Baisden, Thomas Blunier, V. Gabriela Ciobanu, Howard Conway, Dorthe Dahl-Jensen, Tyler J. Fudge, Richard Hindmarsh, Elizabeth D. Keller, Frédéric Parrenin, Jeffrey P. Severinghaus, Paul Vallelonga, Edwin D. Waddington, and Mai Winstrup
Clim. Past, 16, 1691–1713, https://doi.org/10.5194/cp-16-1691-2020, https://doi.org/10.5194/cp-16-1691-2020, 2020
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The Roosevelt Island ice core was drilled to investigate climate from the eastern Ross Sea, West Antarctica. We describe the ice age-scale and gas age-scale of the ice core for 0–763 m (83 000 years BP). Old ice near the bottom of the core implies the ice dome existed throughout the last glacial period and that ice streaming was active in the region. Variations in methane, similar to those used as evidence of early human influence on climate, were observed prior to significant human populations.
Cited articles
Albani, S., Delmonte, B., Maggi, V., Baroni, C., Petit, J.-R., Stenni, B., Mazzola, C., and Frezzotti, M.: Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales, Clim. Past, 8, 741–750, https://doi.org/10.5194/cp-8-741-2012, 2012.
Amo, M. and Minagawa, M.: Sedimentary record of marine and terrigenous
organic matter delivery to the Shatsky Rise, western North Pacific, over the
last 130 kyr, Org. Geochem., 34, 1299–1312, 2003.
Baccolo, G., Delmonte, B., Albani, S., Baroni, C., Cibin, G., Frezzotti, M.,
Hampai, D., Marcelli, A., Revel, M., and Salvatore, M.: Regionalization of
the atmospheric dust cycle on the periphery of the East Antarctic ice sheet
since the last glacial maximum, Geochem. Geophy. Geosy. 19,
3540–3554, 2018.
Basile, I., Grousset, F. E., Revel, M., Petit, J. R., Biscaye, P. E., and
Barkov, N. I.: Patagonian origin of glacial dust deposited in East
Antarctica (Vostok and Dome C) during glacial stages 2, 4 and 6, Earth
Planet. Sci. Lett., 146, 573–589, 1997.
Boyd, P., Muggli, D., Varela, D., Goldblatt, R., Chretien, R., Orians, K.,
and Harrison, P.: In vitro iron enrichment experiments in the NE subarctic
Pacific, Mar. Ecol. Progr. Ser., 136, 179–193, 1996.
Burgay, F., Erhardt, T., Lunga, D. D., Jensen, C. M., Spolaor, A.,
Vallelonga, P., Fischer, H., and Barbante, C.: Fe2+ in ice cores as a new potential proxy to detect past volcanic eruptions, Sci. Total
Environ., 654, 1110–1117, 2019.
Costa, K. M., McManus, J. F., and Anderson, R. F.: Paleoproductivity and
Stratification Across the Subarctic Pacific Over Glacial-Interglacial
Cycles, Paleoceanogr. Paleoclimatol., 33, 914–933, 2018.
Davies, M., Mix, A., Stoner, J., Addison, J., Jaeger, J., Finney, B., and
Wiest, J.: The deglacial transition on the southeastern Alaska Margin:
Meltwater input, sea level rise, marine productivity, and sedimentary
anoxia, Paleoceanography, 26, PA2223, https://doi.org/10.1029/2010PA002051, 2011.
Delmonte, B., Andersson, P., Schöberg, H., Hansson, M., Petit, J.,
Delmas, R., Gaiero, D. M., Maggi, V., and Frezzotti, M.: Geographic
provenance of aeolian dust in East Antarctica during Pleistocene
glaciations: preliminary results from Talos Dome and comparison with East
Antarctic and new Andean ice core data, Quaternary Sci. Rev., 29,
256–264, 2010a.
Delmonte, B., Baroni, C., Andersson, P. S., Schoberg, H., Hansson, M.,
Aciego, S., Petit, J.-R., Albani, S., Mazzola, C., Maggi, V., and Frezzotti,
M.: Aeolian dust in the Talos Dome ice core (East Antarctica, Pacific/Ross
Sea sector): Victoria Land versus remote sources over the last two climate
cycles, J. Quaternary Sci., 25, 1327–1337, 2010b.
Du, Z., Xiao, C., Mayewski, P. A., Handley, M. J., Li, C., Ding, M., Liu,
J., Yang, J., and Liu, K.: The iron records and its sources during
1990–2017 from the Lambert Glacial Basin shallow ice core, East Antarctica,
Chemosphere, 251, 126399, https://doi.org/10.1016/j.chemosphere.2020.126399, 2020.
Duggen, S., Olgun, N., Croot, P., Hoffmann, L., Dietze, H., Delmelle, P., and Teschner, C.: The role of airborne volcanic ash for the surface ocean biogeochemical iron-cycle: a review, Biogeosciences, 7, 827–844, https://doi.org/10.5194/bg-7-827-2010, 2010.
Duprat, L. P., Bigg, G. R., and Wilton, D. J.: Enhanced Southern Ocean
marine productivity due to fertilization by giant icebergs, Nat.
Geosci., 9, 219, https://doi.org/10.1038/ngeo2633, 2016.
Edwards, R., Sedwick, P. N., Morgan, V., Boutron, C. F., and Hong, S.: Iron
in ice cores from Law Dome, East Antarctica: implications for past
deposition of aerosol iron, Ann. Glaciol., 27, 365–370, 1998.
Edwards, R., Sedwick, P., Morgan, V., and Boutron, C.: Iron in ice cores
from Law Dome: A record of atmospheric iron deposition for maritime East
Antarctica during the Holocene and Last Glacial Maximum, Geochem.
Geophy. Geosy., 7, Q12Q01, https://doi.org/10.1029/2006GC001307, 2006.
Edwards, R. P. R.: Iron in modern and ancient East Antarctic snow:
Implications for phytoplankton production in the Southern Ocean, PhD thesis, Institute of Antarctic and Southern Ocean Studies,
University of Tasmania, Hobart, Australia, 1999.
Fuhrer, K., Wolff, E. W., and Johnsen, S. J.: Timescales for dust
variability in the Greenland Ice Core Project (GRIP) ice core in the last
100 000 years, J. Geophys. Res.-Atmos., 104, 31043–31052, 1999.
Gaspari, V., Barbante, C., Cozzi, G., Cescon, P., Boutron, C., Gabrielli,
P., Capodaglio, G., Ferrari, C., Petit, J., and Delmonte, B.: Atmospheric
iron fluxes over the last deglaciation: Climatic implications, Geophys.
Res. Lett., 33, L03704, https://doi.org/10.1029/2005GL024352, 2006.
Han, C., Do Hur, S., Han, Y., Lee, K., Hong, S., Erhardt, T., Fischer, H.,
Svensson, A. M., Steffensen, J. P., and Vallelonga, P.: High-resolution
isotopic evidence for a potential Saharan provenance of Greenland glacial
dust, Sci. Rep.-UK, 8, 1–9, 2018.
Haug, G., Maslin, M., Sarnthein, M., Stax, R., and Tiedemann, R.: 20.
Evolution of Northwest Pacific Sedimentation Patterns Since 6 MA (Site 882),
293, in: Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 145, https://doi.org/10.2973/odp.proc.sr.145.115.1995, 1995.
Hiscock, W. T., Fischer, H., Bigler, M., Gfeller, G., Leuenberger, D., and
Mini, O.: Continuous flow analysis of labile iron in ice-cores,
Environ. Sci. Technol., 47, 4416–4425, 2013.
Jouzel, J., Waelbroeck, C., Malaize, B., Bender, M., Petit, J., Stievenard,
M., Barkov, N., Barnola, J., King, T., and Kotlyakov, V.: Climatic
interpretation of the recently extended Vostok ice records, Clim.
Dyn., 12, 513–521, 1996.
Kang, S., Roberts, H. M., Wang, X., An, Z., and Wang, M.: Mass accumulation
rate changes in Chinese loess during MIS 2, and asynchrony with records from
Greenland ice cores and North Pacific Ocean sediments during the Last
Glacial Maximum, Aeolian Res., 19, 251–258, 2015.
Kawahata, H., Okamoto, T., Matsumoto, E., and Ujiie, H.: Fluctuations of
eolian flux and ocean productivity in the mid-latitude North Pacific during
the last 200 kyr, Quaternary Sci. Rev., 19, 1279–1291, 2000.
Kienast, S. S., Hendy, I. L., Crusius, J., Pedersen, T. F., and Calvert, S.
E.: Export production in the subarctic North Pacific over the last 800 kyr:
No evidence for iron fertilization?, J. Oceanogr., 60, 189–203,
2004.
Koffman, B. G., Handley, M. J., Osterberg, E. C., Wells, M. L., and Kreutz,
K. J.: Dependence of ice-core relative trace-element concentration on
acidification, J. Glaciol., 60, 103–112, 2014.
Kohfeld, K. E. and Chase, Z.: Temporal evolution of mechanisms controlling
ocean carbon uptake during the last glacial cycle, Earth Planet.
Sci. Lett., 472, 206–215, 2017.
Köhler, P., Nehrbass-Ahles, C., Schmitt, J., Stocker, T. F., and Fischer, H.: A 156 kyr smoothed history of the atmospheric greenhouse gases CO2, CH4, and N2O and their radiative forcing, Earth Syst. Sci. Data, 9, 363–387, https://doi.org/10.5194/essd-9-363-2017, 2017.
Lam, P. and Bishop, J. K. B.: The continental margin is a key source of iron
to the HNLC North Pacific Ocean, Geophys. Res. Lett., 35, L07608, https://doi.org/10.1029/2008GL033294, 2008.
Lambert, F., Delmonte, B., Petit, J.-R., Bigler, M., Kaufmann, P. R.,
Hutterli, M. A., Stocker, T. F., Ruth, U., Steffensen, J. P., and Maggi, V.:
Dust-climate couplings over the past 800 000 years from the EPICA Dome C ice
core, Nature, 452, 616–619, https://doi.org/10.1038/nature06763, 2008.
Lambert, F., Tagliabue, A., Shaffer, G., Lamy, F., Winckler, G., Farias, L.,
Gallardo, L., and De Pol-Holz, R.: Dust fluxes and iron fertilization in
Holocene and Last Glacial Maximum climates, Geophys. Res. Lett.,
42, 6014–6023, 2015.
Langmann, B., Zakšek, K., Hort, M., and Duggen, S.: Volcanic ash as fertiliser for the surface ocean, Atmos. Chem. Phys., 10, 3891–3899, https://doi.org/10.5194/acp-10-3891-2010, 2010.
Löfverström, M., Caballero, R., Nilsson, J., and Kleman, J.: Evolution of the large-scale atmospheric circulation in response to changing ice sheets over the last glacial cycle, Clim. Past, 10, 1453–1471, https://doi.org/10.5194/cp-10-1453-2014, 2014.
Lupker, M., Aciego, S. M., Bourdon, B., Schwander, J., and Stocker, T.:
Isotopic tracing (Sr, Nd, U and Hf) of continental and marine aerosols in an
18th century section of the Dye-3 ice core (Greenland), Earth Planet.
Sci. Lett., 295, 277–286, 2010.
Lüthi, D., Le Floch, M., Bereiter, B., Blunier, T., Barnola, J.-M.,
Siegenthaler, U., Raynaud, D., Jouzel, J., Fischer, H., and Kawamura, K.:
High-resolution carbon dioxide concentration record 650 000–800 000 years
before present, Nature, 453, 379–382, 2008.
Mahowald, N. M., Yoshioka, M., Collins, W. D., Conley, A. J., Fillmore, D.
W., and Coleman, D. B.: Climate response and radiative forcing from mineral
aerosols during the last glacial maximum, pre-industrial, current and
doubled-carbon dioxide climates, Geophys. Res. Lett., 33, L20705, https://doi.org/10.1029/2006GL026126, 2006.
Mahowald, N. M., Engelstaedter, S., Luo, C., Sealy, A., Artaxo, P.,
Benitez-Nelson, C., Bonnet, S., Chen, Y., Chuang, P. Y., Cohen, D. D.,
Dulac, F., Herut, B., Johansen, A. M., Kubilay, N., Losno, R., Maenhaut, W.,
Paytan, A., Prospero, J. M., Shank, L. M., and Siefert, R. L.: Atmospheric
Iron Deposition: Global Distribution, Variability, and Human Perturbations,
Annu. Rev. Mar. Sci., 1, 245–278, 2008.
Manabe, S. and Broccoli, A.: The influence of continental ice sheets on the
climate of an ice age, J. Geophys. Res.-Atmos., 90, 2167–2190, 1985.
Martin, J. H., Gordon, R. M., and Fitzwater, S. E.: Iron in Antarctic
waters, Nature, 345, 156–158, 1990.
Martínez-Garcia, A., Rosell-Melé, A., Jaccard, S. L., Geibert, W.,
Sigman, D. M., and Haug, G. H.: Southern Ocean dust–climate coupling over
the past four million years, Nature, 476, 312–316, https://doi.org/10.1038/nature10310, 2011.
Martínez-García, A., Sigman, D. M., Ren, H., Anderson, R. F.,
Straub, M., Hodell, D. A., Jaccard, S. L., Eglinton, T. I., and Haug, G. H.:
Iron fertilization of the Subantarctic Ocean during the last ice age,
Science, 343, 1347–1350, 2014.
Mayewski, P. A., Meeker, L. D., Whitlow, S., Twickler, M. S., Morrison, M.
C., Bloomfield, P., Bond, G., Alley, R. B., Gow, A. J., and Meese, D. A.:
Changes in atmospheric circulation and ocean ice cover over the North
Atlantic during the last 41,000 years, Science, 263, 1747–1751, 1994.
McDonald, D., Pedersen, T., and Crusius, J.: Multiple late Quaternary
episodes of exceptional diatom production in the Gulf of Alaska, Deep Sea
Res. Pt. II, 46, 2993–3017, 1999.
McManus, J. F., Francois, R., Gherardi, J.-M., Keigwin, L. D., and
Brown-Leger, S.: Collapse and rapid resumption of Atlantic meridional
circulation linked to deglacial climate changes, Nature, 428, 834–837, 2004.
Méheust, M., Stein, R., Fahl, K., Max, L., and Riethdorf, J.-R.:
High-resolution IP 25-based reconstruction of sea-ice variability in the
western North Pacific and Bering Sea during the past 18,000 years,
Geo-Mar. Lett., 36, 101–111, 2016.
Méheust, M., Stein, R., Fahl, K., and Gersonde, R.: Sea-ice variability
in the subarctic North Pacific and adjacent Bering Sea during the past 25
ka: new insights from IP 25 and U k' 37 proxy records, Arktos, 4, 1–19, https://doi.org/10.1007/s41063-018-0043-1, 2018.
Miller, R. and Tegen, I.: Climate response to soil dust aerosols, J.
Climate, 11, 3247–3267, 1998.
Müller, J., Wagner, A., Fahl, K., Stein, R., Prange, M., and Lohmann,
G.: Towards quantitative sea ice reconstructions in the northern North
Atlantic: A combined biomarker and numerical modelling approach, Earth Planet. Sci. Lett., 306, 137–148, 2011.
North Greenland Ice Core Project Members: 50 year means of oxygen isotope data from ice core NGRIP, PANGAEA, https://doi.org/10.1594/PANGAEA.586886, 2007.
Olgun, N., Duggen, S., Croot, P. L., Delmelle, P., Dietze, H., Schacht, U.,
Oskarsson, N., Siebe, C., Auer, A., and Garbe-Schönberg, D.: Surface
ocean iron fertilization: the role of subduction zone and hotspot volcanic
ash and fluxes into the Pacific Ocean, Global Biogeochem. Cy., 25,
GB4001, https://doi.org/10.1029/2009GB003761, 2011.
Rasmussen, S. O., Abbott, P. M., Blunier, T., Bourne, A. J., Brook, E., Buchardt, S. L., Buizert, C., Chappellaz, J., Clausen, H. B., Cook, E., Dahl-Jensen, D., Davies, S. M., Guillevic, M., Kipfstuhl, S., Laepple, T., Seierstad, I. K., Severinghaus, J. P., Steffensen, J. P., Stowasser, C., Svensson, A., Vallelonga, P., Vinther, B. M., Wilhelms, F., and Winstrup, M.: A first chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core, Clim. Past, 9, 2713–2730, https://doi.org/10.5194/cp-9-2713-2013, 2013.
Ren, H., Studer, A. S., Serno, S., Sigman, D. M., Winckler, G., Anderson, R.
F., Oleynik, S., Gersonde, R., and Haug, G. H.: Glacial-to-interglacial
changes in nitrate supply and consumption in the subarctic North Pacific
from microfossil-bound N isotopes at two trophic levels, Paleoceanography,
30, 1217–1232, 2015.
Röthlisberger, R., Bigler, M., Wolff, E. W., Joos, F., Monnin, E., and Hutterli, M. A.: Ice core evidence for the extent of past atmospheric
CO2 change due to iron fertilisation, Geophys. Res. Lett., 31, L16207, https://doi.org/10.1029/2004GL020338, 2004.
Ruth, U.: Dust concentration in the NGRIP ice core, PANGAEA, https://doi.org/10.1594/PANGAEA.587836, 2007.
Ruth, U., Bigler, M., Röthlisberger, R., Siggaard-Andersen, M. L.,
Kipfstuhl, S., Goto-Azuma, K., Hansson, M. E., Johnsen, S. J., Lu, H., and
Steffensen, J. P.: Ice core evidence for a very tight link between North
Atlantic and east Asian glacial climate, Geophys. Res. Lett., 34, L03706, https://doi.org/10.1029/2006GL027876, 2007.
Sachs, J. P. and Anderson, R. F.: Increased productivity in the subantarctic
ocean during Heinrich events, Nature, 434, 1118–1121, 2005.
Schepanski, K.: Transport of mineral dust and its impact on climate,
Geosciences, 8, 151, https://doi.org/10.3390/geosciences8050151, 2018.
Schüpbach, S., Fischer, H., Bigler, M., Erhardt, T., Gfeller, G.,
Leuenberger, D., Mini, O., Mulvaney, R., Abram, N. J., and Fleet, L.:
Greenland records of aerosol source and atmospheric lifetime changes from
the Eemian to the Holocene, Nat. Commun., 9, 1476, https://doi.org/10.1038/s41467-018-03924-3, 2018.
Serno, S., Winckler, G., Anderson, R. F., Hayes, C. T., McGee, D.,
Machalett, B., Ren, H., Straub, S. M., Gersonde, R., and Haug, G. H.: Eolian
dust input to the Subarctic North Pacific, Earth Planet. Sci.
Lett., 387, 252–263, 2014.
Serno, S., Winckler, G., Anderson, R. F., Maier, E., Ren, H., Gersonde, R.,
and Haug, G. H.: Comparing dust flux records from the Subarctic North
Pacific and Greenland: Implications for atmospheric transport to Greenland
and for the application of dust as a chronostratigraphic tool,
Paleoceanography, 30, 583–600, 2015.
Shoenfelt, E. M., Sun, J., Winckler, G., Kaplan, M. R., Borunda, A. L.,
Farrell, K. R., Moreno, P. I., Gaiero, D. M., Recasens, C., and Sambrotto,
R. N.: High particulate iron (II) content in glacially sourced dusts
enhances productivity of a model diatom, Sci. Adv., 3, e1700314, https://doi.org/10.1126/sciadv.1700314, 2017.
Shoenfelt, E. M., Winckler, G., Lamy, F., Anderson, R. F., and Bostick, B.
C.: Highly bioavailable dust-borne iron delivered to the Southern Ocean
during glacial periods, P. Natl. Acad. Sci. USA, 115, 11180–11185, 2018.
Smetacek, V., Klaas, C., Strass, V. H., Assmy, P., Montresor, M., Cisewski,
B., Savoye, N., Webb, A., d'Ovidio, F., and Arrieta, J. M.: Deep carbon
export from a Southern Ocean iron-fertilized diatom bloom, Nature, 487,
313–319, 2012.
Spolaor, A., Vallelonga, P., Cozzi, G., Gabrieli, J., Varin, C., Kehrwald,
N., Zennaro, P., Boutron, C., and Barbante, C.: Iron speciation in aerosol
dust influences iron bioavailability over glacial-interglacial timescales,
Geophys. Res. Lett., 40, 1618–1623, 2013.
Sun, W., Shen, J., Yu, S.-Y., Long, H., Zhang, E., Liu, E., and Chen, R.: A
lacustrine record of East Asian summer monsoon and atmospheric dust loading
since the last interglaciation from Lake Xingkai, northeast China,
Quaternary Res., 89, 270–280, 2018.
Svensson, A., Biscaye, P. E., and Grousset, F. E.: Characterization of late
glacial continental dust in the Greenland Ice Core Project ice core, J.
Geophys. Res.-Atmos., 105, 4637–4656, 2000.
Talley, L. D.: Freshwater transport estimates and the global overturning
circulation: Shallow, deep and throughflow components, Prog.
Oceanogr., 78, 257–303, 2008.
Tsuda, A., Takeda, S., Saito, H., Nishioka, J., Nojiri, Y., Kudo, I.,
Kiyosawa, H., Shiomoto, A., Imai, K., and Ono, T.: A mesoscale iron
enrichment in the western subarctic Pacific induces a large centric diatom
bloom, Science, 300, 958–961, 2003.
Tulenko, J. P., Lofverstrom, M., and Briner, J. P.: Ice sheet influence on
atmospheric circulation explains the patterns of Pleistocene alpine glacier
records in North America, Earth Planet. Sci. Lett., 534, 116115, https://doi.org/10.1016/j.epsl.2020.116115, 2020.
Vallelonga, P., Van de Velde, K., Candelone, J.-P., Morgan, V., Boutron, C.,
and Rosman, K.: The lead pollution history of Law Dome, Antarctica, from
isotopic measurements on ice cores: 1500 AD to 1989 AD, Earth Planet.
Sci. Lett., 204, 291–306, 2002.
Vallelonga, P., Barbante, C., Cozzi, G., Gabrieli, J., Schüpbach, S., Spolaor, A., and Turetta, C.: Iron fluxes to Talos Dome, Antarctica, over the past 200 kyr, Clim. Past, 9, 597–604, https://doi.org/10.5194/cp-9-597-2013, 2013.
Watanabe, O., Jouzel, J., Johnsen, S., Parrenin, F., Shoji, H., and Yoshida,
N.: Homogeneous climate variability across East Antarctica over the past
three glacial cycles, Nature, 422, 509–512, 2003.
Wolff, E. W., Fischer, H., Fundel, F., Ruth, U., Twarloh, B., Littot, G. C.,
Mulvaney, R., Röthlisberger, R., De Angelis, M., and Boutron, C. F.:
Southern Ocean sea-ice extent, productivity and iron flux over the past
eight glacial cycles, Nature, 440, 491–496, 2006.
Xiao, C., Du, Z., Handley, M. J., Mayewski, P. A., Cao, J., Schüpbach,
S., Zhang, T., Petit, J.-R., Li, C., and Han, Y.: Iron in the NEEM ice core
relative to Asian loess records over the last glacial-interglacial cycle,
Natl. Sci. Rev., nwaa144, https://doi.org/10.1093/nsr/nwaa144, 2020.
Xiao, J., An, Z., Liu, T., Inouchi, Y., Kumai, H., Yoshikawa, S., and Kondo,
Y.: East Asian monsoon variation during the last 130,000 years: evidence
from the Loess Plateau of central China and Lake Biwa of Japan, Quaternary
Sci. Rev., 18, 147–157, 1999.
Yoon, J.-E., Yoo, K.-C., Macdonald, A. M., Yoon, H.-I., Park, K.-T., Yang, E. J., Kim, H.-C., Lee, J. I., Lee, M. K., Jung, J., Park, J., Lee, J., Kim, S., Kim, S.-S., Kim, K., and Kim, I.-N.: Reviews and syntheses: Ocean iron fertilization experiments – past, present, and future looking to a future Korean Iron Fertilization Experiment in the Southern Ocean (KIFES) project, Biogeosciences, 15, 5847–5889, https://doi.org/10.5194/bg-15-5847-2018, 2018.
Young, R., Carder, K., Betzer, P., Costello, D., Duce, R., DiTullio, G.,
Tindale, N., Laws, E., Uematsu, M., and Merrill, J.: Atmospheric iron inputs
and primary productivity: Phytoplankton responses in the North Pacific,
Global Biogeochem. Cy., 5, 119–134, 1991.
Yung, Y. L., Lee, T., Wang, C.-H., and Shieh, Y.-T.: Dust: A diagnostic of
the hydrologic cycle during the Last Glacial Maximum, Science, 271, 962–963,
1996.
Zahn, R., Pedersen, T. F., Bornhold, B. D., and Mix, A. C.: Water mass
conversion in the glacial subarctic Pacific (54∘ N, 148∘ W): Physical constraints and the benthic-planktonic stable isotope record, Paleoceanography, 6, 543–560, 1991.
Zhang, X.-Y., Gong, S., Zhao, T., Arimoto, R., Wang, Y., and Zhou, Z.:
Sources of Asian dust and role of climate change versus desertification in
Asian dust emission, Geophys. Res. Lett., 30, 2272, https://doi.org/10.1029/2003GL018206, 2003.
Zhang, X., Han, Y., Sun, Y., Cao, J., and An, Z.: Asian dust, eolian iron
and black carbon–Connections to climate changes, in: Late Cenozoic Climate
Change in Asia, Springer, Dordrecht, the Netherlands, https://doi.org/10.1007/978-94-007-7817-7_4, 2014.
Short summary
We present the first Fe record from the NEEM ice core, which provides insight into past atmospheric Fe deposition in the Arctic. Considering the biological relevance of Fe, we questioned if the increased eolian Fe supply during glacial periods could explain the marine productivity variability in the Fe-limited subarctic Pacific Ocean. We found no overwhelming evidence that eolian Fe fertilization triggered any phytoplankton blooms, likely because other factors play a more relevant role.
We present the first Fe record from the NEEM ice core, which provides insight into past...
