Articles | Volume 18, issue 6
https://doi.org/10.5194/cp-18-1275-2022
© Author(s) 2022. 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-18-1275-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Comprehensive uncertainty estimation of the timing of Greenland warmings in the Greenland ice core records
Eirik Myrvoll-Nilsen
CORRESPONDING AUTHOR
Potsdam Institute for Climate Impact Research, Potsdam, Germany
Keno Riechers
Potsdam Institute for Climate Impact Research, Potsdam, Germany
Earth System Modelling, School of Engineering & Design, Technical University of Munich, Munich, Germany
Martin Wibe Rypdal
Department of Mathematics and Statistics, The University of Tromsø – The Arctic University of Norway, Tromsø, Norway
Niklas Boers
CORRESPONDING AUTHOR
Potsdam Institute for Climate Impact Research, Potsdam, Germany
Earth System Modelling, School of Engineering & Design, Technical University of Munich, Munich, Germany
Department of Mathematics, Global Systems Institute, University of Exeter, Exeter, UK
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Paleoclimate proxy records show that the North Atlantic climate repeatedly transitioned between two regimes during the last glacial interval. This study investigates a bivariate proxy record from a Greenland ice core which reflects past Greenland temperatures and large-scale atmospheric conditions. We reconstruct the underlying deterministic drift by estimating first-order Kramers–Moyal coefficients and identify two separate stable states in agreement with the aforementioned climatic regimes.
Taylor Smith, Ruxandra-Maria Zotta, Chris A. Boulton, Timothy M. Lenton, Wouter Dorigo, and Niklas Boers
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Building upon Milancovic's theory of orbital forcing, this paper reviews the interplay between intrinsic variability and external forcing in the emergence of glacial interglacial cycles. It provides the reader with historical background information and with basic theoretical concepts used in recent paleoclimate research. Moreover, it presents new results which confirm the reduced stability of glacial-cycle dynamics after the mid-Pleistocene transition.
Keno Riechers and Niklas Boers
Clim. Past, 17, 1751–1775, https://doi.org/10.5194/cp-17-1751-2021, https://doi.org/10.5194/cp-17-1751-2021, 2021
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Greenland ice core data show that the last glacial cycle was punctuated by a series of abrupt climate shifts comprising significant warming over Greenland, retreat of North Atlantic sea ice, and atmospheric reorganization. Statistical analysis of multi-proxy records reveals no systematic lead or lag between the transitions of proxies that represent different climatic subsystems, and hence no evidence for a potential trigger of these so-called Dansgaard–Oeschger events can be found.
Cited articles
Adolphi, F., Bronk Ramsey, C., Erhardt, T., Edwards, R. L., Cheng, H., Turney, C. S. M., Cooper, A., Svensson, A., Rasmussen, S. O., Fischer, H., and Muscheler, R.: Connecting the Greenland ice-core and U∕Th timescales via cosmogenic radionuclides: testing the synchroneity of Dansgaard–Oeschger events, Clim. Past, 14, 1755–1781, https://doi.org/10.5194/cp-14-1755-2018, 2018. a
Andersen, K. K., Svensson, A., Johnsen, S. J., Rasmussen, S. O., Bigler, M.,
Röthlisberger, R., Ruth, U., Siggaard-Andersen, M. L., Peder
Steffensen, J., Dahl-Jensen, D., Vinther, B. M., and Clausen, H. B.: The
Greenland Ice Core Chronology 2005, 15–42 ka. Part 1: constructing the time
scale, Quaternary Sci. Rev., 25, 3246–3257,
https://doi.org/10.1016/j.quascirev.2006.08.002, 2006. a, b, c, d, e, f, g
Blaauw, M. and Christeny, J. A.: Flexible paleoclimate age-depth models using
an autoregressive gamma process, Bayesian Anal., 6, 457–474,
https://doi.org/10.1214/11-BA618, 2011. a
Boers, N., Goswami, B., and Ghil, M.: A complete representation of uncertainties in layer-counted paleoclimatic archives, Clim. Past, 13, 1169–1180, https://doi.org/10.5194/cp-13-1169-2017, 2017. a, b
Buizert, C., Cuffey, K. M., Severinghaus, J. P., Baggenstos, D., Fudge, T. J., Steig, E. J., Markle, B. R., Winstrup, M., Rhodes, R. H., Brook, E. J., Sowers, T. A., Clow, G. D., Cheng, H., Edwards, R. L., Sigl, M., McConnell, J. R., and Taylor, K. C.: The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference, Clim. Past, 11, 153–173, https://doi.org/10.5194/cp-11-153-2015, 2015. a, b, c, d
Capron, E., Rasmussen, S. O., Popp, T. J., Erhardt, T., Fischer, H., Landais,
A., Pedro, J. B., Vettoretti, G., Grinsted, A., Gkinis, V., Vaughn, B.,
Svensson, A., Vinther, B. M., and White, J. W.: The anatomy of past abrupt
warmings recorded in Greenland ice, Nat. Commun., 12, 2106,
https://doi.org/10.1038/s41467-021-22241-w, 2021. a, b, c, d, e
Comboul, M., Emile-Geay, J., Evans, M. N., Mirnateghi, N., Cobb, K. M., and Thompson, D. M.: A probabilistic model of chronological errors in layer-counted climate proxies: applications to annually banded coral archives, Clim. Past, 10, 825–841, https://doi.org/10.5194/cp-10-825-2014, 2014. a, b
Corrick, E. C., Drysdale, R. N., Hellstrom, J. C., Capron, E., Rasmussen,
S. O., Zhang, X., Fleitmann, D., Couchoud, I., Wolff, E., and Monsoon, S. A.:
Synchronous timing of abrupt climate changes during the last glacial
period, Science, 369, 963–969, 2020. a
Dansgaard, W., Johnsen, S. J., Clausen, H. B., Dahl-Jensen, D., Gundestrup,
N. S., Hammer, C. U., Hvidberg, C. S., Steffensen, J. P.,
Sveinbjörnsdottir, A. E., Jouzel, J., and Bond, G.: Evidence for
general instability of past climate from a 250-kyr ice-core record, Nature,
364, 218–220, https://doi.org/10.1038/364218a0, 1993. a, b
Erhardt, T., Capron, E., Rasmussen, S. O., Schüpbach, S., Bigler, M., Adolphi, F., and Fischer, H.: Decadal-scale progression of the onset of Dansgaard–Oeschger warming events, Clim. Past, 15, 811–825, https://doi.org/10.5194/cp-15-811-2019, 2019. a, b, c
Gkinis, V., Simonsen, S. B., Buchardt, S. L., White, J. W., and Vinther, B. M.:
Water isotope diffusion rates from the NorthGRIP ice core for the last
16,000 years – Glaciological and paleoclimatic implications, Earth
Planet. Sc. Lett., 405, 132–141, https://doi.org/10.1016/j.epsl.2014.08.022,
2014. a, b
Goodman, J. and Weare, J.: Ensemble samplers with affine invariance, Comm. App. Math. Com. Sc., 5, 1–99, 2010. a
Haslett, J. and Parnell, A.: A simple monotone process with application to
radiocarbon-dated depth chronologies, J. R. Stat.
Soc. C-Appl., 57, 399–418,
https://doi.org/10.1111/j.1467-9876.2008.00623.x, 2008. a
Jouzel, J., Alley, R. B., Cuffey, K. M., Dansgaard, W., Grootes, P., Hoffmann,
G., Johnsen, S. J., Koster, R. D., Peel, D., Shuman, C. A., Stievenard, M.,
Stuiver, M., and White, J.: Validity of the temperature reconstruction from
water isotopes in ice cores, J. Geophys. Res.-Oceans, 102,
26471–26487, https://doi.org/10.1029/97JC01283, 1997. a
Li, T. Y., Han, L. Y., Cheng, H., Edwards, R. L., Shen, C. C., Li, H. C., Li,
J. Y., Huang, C. X., Zhang, T. T., and Zhao, X.: Evolution of the Asian
summer monsoon during Dansgaard/Oeschger events 13–17 recorded in a
stalagmite constrained by high-precision chronology from southwest China,
Quaternary Res., 88, 121–128, https://doi.org/10.1017/qua.2017.22,
2017. a
McKay, N. P., Emile-Geay, J., and Khider, D.: geoChronR – an R package to model, analyze, and visualize age-uncertain data, Geochronology, 3, 149–169, https://doi.org/10.5194/gchron-3-149-2021, 2021. a, b
Myrvoll-Nilsen, E.: eirikmn/dating_uncertainty: First release (v1.1.0), Zenodo [code], https://doi.org/10.5281/zenodo.6637528, 2022.
North Greenland Ice Core Project members: High-resolution record of Northern
Hemisphere climate extending into the last interglacial period, Nature, 431,
147–151, https://doi.org/10.1038/nature02805, 2004. a, b
Parnell, A. C., Haslett, J., Allen, J. R., Buck, C. E., and Huntley, B.: A
flexible approach to assessing synchroneity of past events using Bayesian
reconstructions of sedimentation history, Quaternary Sci. Rev., 27,
1872–1885, https://doi.org/10.1016/j.quascirev.2008.07.009, 2008. a
Ramsey, C. B.: Radiocarbon calibration and analysis of stratigraphy: the OxCal
program, Radiocarbon, 37, 425–430, https://doi.org/10.1017/s0033822200030903, 1995. a
Ramsey, C. B.: Deposition models for chronological records, Quaternary
Sci. Rev., 27, 42–60, https://doi.org/10.1016/j.quascirev.2007.01.019, 2008. a
Rasmussen, S. O., Andersen, K. K., Svensson, A. M., Steffensen, J. P., Vinther,
B. M., Clausen, H. B., Siggaard-Andersen, M. L., Johnsen, S. J., Larsen,
L. B., Dahl-Jensen, D., Bigler, M., Röthlisberger, R., Fischer, H.,
Goto-Azuma, K., Hansson, M. E., and Ruth, U.: A new Greenland ice core
chronology for the last glacial termination, J. Geophys. Res.-Atmos., 111, 1–16, https://doi.org/10.1029/2005JD006079, 2006. a, b, c, d, e, f
Rasmussen, S. O., Bigler, M., Blockley, S. P., Blunier, T., Buchardt, S. L.,
Clausen, H. B., Cvijanovic, I., Dahl-Jensen, D., Johnsen, S. J., Fischer, H.,
Gkinis, V., Guillevic, M., Hoek, W. Z., Lowe, J. J., Pedro, J. B., Popp, T.,
Seierstad, I. K., Steffensen, J. P., Svensson, A. M., Vallelonga, P.,
Vinther, B. M., Walker, M. J., Wheatley, J. J., and Winstrup, M.: A
stratigraphic framework for abrupt climatic changes during the Last Glacial
period based on three synchronized Greenland ice-core records: refining and
extending the INTIMATE event stratigraphy, Quaternary Sci. Rev., 106,
14–28, https://doi.org/10.1016/j.quascirev.2014.09.007, 2014. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q
Riechers, K. and Boers, N.: A statistical approach to the phasing of
atmospheric reorganization and sea ice retreat at the onset of
Dansgaard–Oeschger events under rigorous treatment of uncertainties, Clim. Past Discuss. [preprint], 2020, 1–30, https://doi.org/10.5194/cp-2020-136, 2020. a, b
Rue, H., Martino, S., and Chopin, N.: Approximate Bayesian inference for
latent Gaussian models using integrated nested Laplace approximations
(with discussion), J. R. Stat. Soc. Series B, 71, 319–392, 2009. a
Rue, H., Riebler, A., Sørbye, S. H., Illian, J. B., Simpson, D. P., and
Lindgren, F. K.: Bayesian Computing with INLA: A Review, Annu. Rev. Stat.
Appl., 4, 395–421, 2017. a
Ruth, U., Wagenbach, D., Steffensen, J. P., and Bigler, M.: Continuous record
of microparticle concentration and size distribution in the central Greenland
NGRIP ice core during the last glacial period, J. Geophys. Res.-Atmos., 108, 1–12, https://doi.org/10.1029/2002jd002376, 2003. a, b, c
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,
1–5, https://doi.org/10.1029/2006GL027876, 2007. a
Schüpbach, S., Fischer, H., Bigler, M., Erhardt, T., Gfeller, G.,
Leuenberger, D., Mini, O., Mulvaney, R., Abram, N. J., Fleet, L., Frey,
M. M., Thomas, E., Svensson, A., Dahl-Jensen, D., Kettner, E., Kjaer, H.,
Seierstad, I., Steffensen, J. P., Rasmussen, S. O., Vallelonga, P., Winstrup,
M., Wegner, A., Twarloh, B., Wolff, K., Schmidt, K., Goto-Azuma, K.,
Kuramoto, T., Hirabayashi, M., Uetake, J., Zheng, J., Bourgeois, J., Fisher,
D., Zhiheng, D., Xiao, C., Legrand, M., Spolaor, A., Gabrieli, J., Barbante,
C., Kang, J. H., Hur, S. D., Hong, S. B., Hwang, H. J., Hong, S., Hansson,
M., Iizuka, Y., Oyabu, I., Muscheler, R., Adolphi, F., Maselli, O.,
McConnell, J., and Wolff, E. W.: 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. a
Svensson, A., Andersen, K. K., Bigler, M., Clausen, H. B., Dahl-Jensen, D., Davies, S. M., Johnsen, S. J., Muscheler, R., Parrenin, F., Rasmussen, S. O., Röthlisberger, R., Seierstad, I., Steffensen, J. P., and Vinther, B. M.: A 60 000 year Greenland stratigraphic ice core chronology, Clim. Past, 4, 47–57, https://doi.org/10.5194/cp-4-47-2008, 2008. a, b, c
Vinther, B. M., Clausen, H. B., Johnsen, S. J., Rasmussen, S. O., Andersen,
K. K., Buchardt, S. L., Dahl-Jensen, D., Seierstad, I. K., Siggaard-Andersen,
M. L., Steffensen, J. P., Svensson, A., Olsen, J., and Heinemeier, J.: A
synchronized dating of three Greenland ice cores throughout the Holocene,
J. Geophys. Res.-Atmos., 111, 1–11,
https://doi.org/10.1029/2005JD006921, 2006. a, b, c
Zhou, H., Zhao, J. X., Feng, Y., Chen, Q., Mi, X., Shen, C. C., He, H., Yang,
L., Liu, S., Chen, L., Huang, J., and Zhu, L.: Heinrich event 4 and
Dansgaard/Oeschger events 5–10 recorded by high-resolution speleothem oxygen
isotope data from central China, Quaternary Res., 82,
394–404, https://doi.org/10.1016/j.yqres.2014.07.006, 2014. a
Short summary
In layer counted proxy records each measurement is accompanied by a timestamp typically measured by counting periodic layers. Knowledge of the uncertainty of this timestamp is important for a rigorous propagation to further analyses. By assuming a Bayesian regression model to the layer increments we express the dating uncertainty by the posterior distribution, from which chronologies can be sampled efficiently. We apply our framework to dating abrupt warming transitions during the last glacial.
In layer counted proxy records each measurement is accompanied by a timestamp typically measured...