Articles | Volume 19, issue 6
https://doi.org/10.5194/cp-19-1201-2023
© Author(s) 2023. 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-19-1201-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Effects of ozone levels on climate through Earth history
School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada
Colin Goldblatt
School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada
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Daniel Garduno Ruiz, Colin Goldblatt, and Anne-Sofie Ahm
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2024-163, https://doi.org/10.5194/gmd-2024-163, 2024
Revised manuscript under review for GMD
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Photochemical models describe how the composition of an atmosphere changes due to chemical reactions, transport, and other processes. These models are useful for studying the composition of the Earth and other planet's atmospheres. Understanding the results of these models can be difficult. Here, we build on previous work to develop an open-source code that can identify the reaction chains (pathways) that produce the results of these models, facilitating the understanding of these results.
Colin Goldblatt, Lucas Kavanagh, and Maura Dewey
Geosci. Model Dev., 10, 3931–3940, https://doi.org/10.5194/gmd-10-3931-2017, https://doi.org/10.5194/gmd-10-3931-2017, 2017
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We provide the experimental designs and protocols for a community experiment to compare radiative transfer codes used for past climate on Earth, and for exoplanets.
Benjamin W. Johnson, Natashia Drage, Jody Spence, Nova Hanson, Rana El-Sabaawi, and Colin Goldblatt
Solid Earth, 8, 307–318, https://doi.org/10.5194/se-8-307-2017, https://doi.org/10.5194/se-8-307-2017, 2017
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Contrary to canonical notions, recent research suggests that N can cycle throughout the solid Earth over geologic time. Such cycling may directly affect climate and biologic productivity. Due to low concentrations in rocks and minerals, analysis and interpretation are difficult. Therefore, we adapted a fluorometry technique used in aquatic chemistry for use on geologic samples. We compare fluorometry to mass spectrometry and present discussion of the abundance of N in continental crust.
B. Byrne and C. Goldblatt
Clim. Past, 11, 559–570, https://doi.org/10.5194/cp-11-559-2015, https://doi.org/10.5194/cp-11-559-2015, 2015
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High methane concentrations are thought to have helped sustain warm surface temperatures on the early Earth (~3 billion years ago) when the sun was only 80% as luminous as today. However, radiative transfer calculations with updated spectral data show that methane is a stronger absorber of solar radiation than previously thought. In this paper we show that the increased solar absorption causes a redcution in the warming ability of methane in the Archaean atmosphere.
B. Byrne and C. Goldblatt
Clim. Past, 10, 1779–1801, https://doi.org/10.5194/cp-10-1779-2014, https://doi.org/10.5194/cp-10-1779-2014, 2014
Related subject area
Subject: Climate Modelling | Archive: Modelling only | Timescale: Pre-Cenozoic
Diagnosing the controls on desert dust emissions through the Phanerozoic
Exploring the mechanisms of Devonian oceanic anoxia: impact of ocean dynamics, palaeogeography and orbital forcing
Climate and ocean circulation in the aftermath of a Marinoan snowball Earth
Deep ocean temperatures through time
The Pliocene Model Intercomparison Project Phase 2: large-scale climate features and climate sensitivity
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation
Stripping back the modern to reveal the Cenomanian–Turonian climate and temperature gradient underneath
Diminished greenhouse warming from Archean methane due to solar absorption lines
The faint young Sun problem revisited with a 3-D climate–carbon model – Part 1
The initiation of Neoproterozoic "snowball" climates in CCSM3: the influence of paleocontinental configuration
Albedo and heat transport in 3-D model simulations of the early Archean climate
Sea-ice dynamics strongly promote Snowball Earth initiation and destabilize tropical sea-ice margins
The Aptian evaporites of the South Atlantic: a climatic paradox?
The initiation of modern soft and hard Snowball Earth climates in CCSM4
Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model
Clouds and the Faint Young Sun Paradox
Model-dependence of the CO2 threshold for melting the hard Snowball Earth
Yixuan Xie, Daniel J. Lunt, and Paul J. Valdes
Clim. Past, 20, 2561–2585, https://doi.org/10.5194/cp-20-2561-2024, https://doi.org/10.5194/cp-20-2561-2024, 2024
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Desert dust plays a crucial role in the climate system; while it is relatively well studied for the present day, we still lack knowledge on how it was in the past and on its underlying mechanism in the multi-million-year timescale of Earth’s history. For the first time, we simulate dust emissions using the newly developed DUSTY1.0 model over the past 540 million years with a temporal resolution of ~5 million years. We find that palaeogeography is the primary control of these variations.
Justin Gérard, Loïc Sablon, Jarno J. C. Huygh, Anne-Christine Da Silva, Alexandre Pohl, Christian Vérard, and Michel Crucifix
EGUsphere, https://doi.org/10.5194/egusphere-2024-1983, https://doi.org/10.5194/egusphere-2024-1983, 2024
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We used cGENIE, a climate model, to explore how changes in continental configuration, CO2 levels, and orbital configuration affect ocean oxygen levels during the Devonian period (419–359 million years ago). Key factors contributing to ocean anoxia were identified, highlighting the influence of continental configurations, atmospheric conditions, and orbital changes. Our findings offer new insights into the causes and prolonged durations of Devonian ocean anoxic events.
Lennart Ramme and Jochem Marotzke
Clim. Past, 18, 759–774, https://doi.org/10.5194/cp-18-759-2022, https://doi.org/10.5194/cp-18-759-2022, 2022
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After the Marinoan snowball Earth, the climate warmed rapidly due to enhanced greenhouse conditions, and the freshwater inflow of melting glaciers caused a strong stratification of the ocean. Our climate simulations reveal a potentially only moderate global temperature increase and a break-up of the stratification within just a few thousand years. The findings give insights into the environmental conditions relevant for the geological and biological evolution during that time.
Paul J. Valdes, Christopher R. Scotese, and Daniel J. Lunt
Clim. Past, 17, 1483–1506, https://doi.org/10.5194/cp-17-1483-2021, https://doi.org/10.5194/cp-17-1483-2021, 2021
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Deep ocean temperatures are widely used as a proxy for global mean surface temperature in the past, but the underlying assumptions have not been tested. We use two unique sets of 109 climate model simulations for the last 545 million years to show that the relationship is valid for approximately the last 100 million years but breaks down for older time periods when the continents (and hence ocean circulation) are in very different positions.
Alan M. Haywood, Julia C. Tindall, Harry J. Dowsett, Aisling M. Dolan, Kevin M. Foley, Stephen J. Hunter, Daniel J. Hill, Wing-Le Chan, Ayako Abe-Ouchi, Christian Stepanek, Gerrit Lohmann, Deepak Chandan, W. Richard Peltier, Ning Tan, Camille Contoux, Gilles Ramstein, Xiangyu Li, Zhongshi Zhang, Chuncheng Guo, Kerim H. Nisancioglu, Qiong Zhang, Qiang Li, Youichi Kamae, Mark A. Chandler, Linda E. Sohl, Bette L. Otto-Bliesner, Ran Feng, Esther C. Brady, Anna S. von der Heydt, Michiel L. J. Baatsen, and Daniel J. Lunt
Clim. Past, 16, 2095–2123, https://doi.org/10.5194/cp-16-2095-2020, https://doi.org/10.5194/cp-16-2095-2020, 2020
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The large-scale features of middle Pliocene climate from the 16 models of PlioMIP Phase 2 are presented. The PlioMIP2 ensemble average was ~ 3.2 °C warmer and experienced ~ 7 % more precipitation than the pre-industrial era, although there are large regional variations. PlioMIP2 broadly agrees with a new proxy dataset of Pliocene sea surface temperatures. Combining PlioMIP2 and proxy data suggests that a doubling of atmospheric CO2 would increase globally averaged temperature by 2.6–4.8 °C.
Jean-Baptiste Ladant, Christopher J. Poulsen, Frédéric Fluteau, Clay R. Tabor, Kenneth G. MacLeod, Ellen E. Martin, Shannon J. Haynes, and Masoud A. Rostami
Clim. Past, 16, 973–1006, https://doi.org/10.5194/cp-16-973-2020, https://doi.org/10.5194/cp-16-973-2020, 2020
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Understanding of the role of ocean circulation on climate is contingent on the ability to reconstruct its modes and evolution. Here, we show that earth system model simulations of the Late Cretaceous predict major changes in ocean circulation as a result of paleogeographic and gateway evolution. Comparisons of model results with available data compilations demonstrate reasonable agreement but highlight that various plausible theories of ocean circulation change coexist during this period.
Marie Laugié, Yannick Donnadieu, Jean-Baptiste Ladant, J. A. Mattias Green, Laurent Bopp, and François Raisson
Clim. Past, 16, 953–971, https://doi.org/10.5194/cp-16-953-2020, https://doi.org/10.5194/cp-16-953-2020, 2020
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To quantify the impact of major climate forcings on the Cretaceous climate, we use Earth system modelling to progressively reconstruct the Cretaceous state by changing boundary conditions one by one. Between the preindustrial and the Cretaceous simulations, the model simulates a global warming of more than 11°C. The study confirms the primary control exerted by atmospheric CO2 on atmospheric temperatures. Palaeogeographic changes represent the second major contributor to the warming.
B. Byrne and C. Goldblatt
Clim. Past, 11, 559–570, https://doi.org/10.5194/cp-11-559-2015, https://doi.org/10.5194/cp-11-559-2015, 2015
Short summary
Short summary
High methane concentrations are thought to have helped sustain warm surface temperatures on the early Earth (~3 billion years ago) when the sun was only 80% as luminous as today. However, radiative transfer calculations with updated spectral data show that methane is a stronger absorber of solar radiation than previously thought. In this paper we show that the increased solar absorption causes a redcution in the warming ability of methane in the Archaean atmosphere.
G. Le Hir, Y. Teitler, F. Fluteau, Y. Donnadieu, and P. Philippot
Clim. Past, 10, 697–713, https://doi.org/10.5194/cp-10-697-2014, https://doi.org/10.5194/cp-10-697-2014, 2014
Y. Liu, W. R. Peltier, J. Yang, and G. Vettoretti
Clim. Past, 9, 2555–2577, https://doi.org/10.5194/cp-9-2555-2013, https://doi.org/10.5194/cp-9-2555-2013, 2013
H. Kienert, G. Feulner, and V. Petoukhov
Clim. Past, 9, 1841–1862, https://doi.org/10.5194/cp-9-1841-2013, https://doi.org/10.5194/cp-9-1841-2013, 2013
A. Voigt and D. S. Abbot
Clim. Past, 8, 2079–2092, https://doi.org/10.5194/cp-8-2079-2012, https://doi.org/10.5194/cp-8-2079-2012, 2012
A.-C. Chaboureau, Y. Donnadieu, P. Sepulchre, C. Robin, F. Guillocheau, and S. Rohais
Clim. Past, 8, 1047–1058, https://doi.org/10.5194/cp-8-1047-2012, https://doi.org/10.5194/cp-8-1047-2012, 2012
J. Yang, W. R. Peltier, and Y. Hu
Clim. Past, 8, 907–918, https://doi.org/10.5194/cp-8-907-2012, https://doi.org/10.5194/cp-8-907-2012, 2012
A. Voigt, D. S. Abbot, R. T. Pierrehumbert, and J. Marotzke
Clim. Past, 7, 249–263, https://doi.org/10.5194/cp-7-249-2011, https://doi.org/10.5194/cp-7-249-2011, 2011
C. Goldblatt and K. J. Zahnle
Clim. Past, 7, 203–220, https://doi.org/10.5194/cp-7-203-2011, https://doi.org/10.5194/cp-7-203-2011, 2011
Y. Hu, J. Yang, F. Ding, and W. R. Peltier
Clim. Past, 7, 17–25, https://doi.org/10.5194/cp-7-17-2011, https://doi.org/10.5194/cp-7-17-2011, 2011
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Short summary
Prior to 2.5 billion years ago, ozone was present in our atmosphere only in trace amounts. To understand how climate has changed in response to ozone build-up, we have run 3-D climate simulations with different amounts of ozone. We find that Earth's surface is about 3 to 4 °C degrees cooler with low ozone. This is caused by cooling of the upper atmosphere, where ozone is a warming agent. Its removal causes the upper atmosphere to become drier, weakening the greenhouse warming by water vapor.
Prior to 2.5 billion years ago, ozone was present in our atmosphere only in trace amounts. To...