Article
Multidisciplinary Sciences
Alexander J. Thompson, Jiang Zhu, Christopher J. Poulsen, Jessica E. Tierney, Christopher B. Skinner
Summary: The controversy surrounding the Holocene thermal maximum, a period of global warmth in the early to mid-Holocene, has been addressed through simulations showing that vegetation change in the Northern Hemisphere can explain the warming trend that previous models failed to reproduce. These findings emphasize the importance of considering vegetation dynamics when modeling the temperature evolution during the Holocene.
Article
Meteorology & Atmospheric Sciences
Yonggang Liu, Peng Liu, Dawei Li, Yiran Peng, Yongyun Hu
Summary: The study shows that dust plays an important role in cooling the global climate and potentially facilitating snowball Earth events, but the cooling effect of dust weakens as the climate becomes colder and the surface albedo increases. When there is heavy dust loading, the threshold for Earth to enter a snowball state decreases significantly, even with lower atmospheric CO2 concentrations.
JOURNAL OF CLIMATE
(2021)
Article
Engineering, Aerospace
Bijay Kumar Guha, Jagabandhu Panda
Summary: This study analyzes characteristic features of the Mars year 34 (2018) global dust storm (GD18) and finds specific temporal and spatial characteristics in the formation and propagation of the storm. It is observed that the vertical mixing timescale is independent of the spatial scale of the dust storm.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Meteorology & Atmospheric Sciences
Yi Qin, Mark D. Zelinka, Stephen A. Klein
Summary: Atmosphere-only experiments are confirmed to be a valid approach for investigating climate feedbacks, especially cloud feedbacks in global climate model simulations. Results from CMIP6 show better agreement between atmosphere-only and coupled simulations for global-mean cloud feedbacks, but longer experiments are needed to reveal regional cloud feedbacks.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
G. A. Folberth, Z. Staniaszek, A. T. Archibald, N. Gedney, P. T. Griffiths, C. D. Jones, F. M. O'Connor, R. J. Parker, A. A. Sellar, A. Wiltshire
Summary: Methane is an important greenhouse gas and atmospheric pollutant. Understanding its global cycle and interactions with the Earth system is crucial for accurate predictions of climate change and assessments of mitigation strategies. A newly developed methane emission-driven model successfully simulates the methane cycle and provides important insights into methane sources and sinks. The model's results are in good agreement with available observations.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
Yunjie Chen, Nozomu Takeuchi, Feiteng Wang, Zhongqin Li
Summary: Diverse microbial communities live on glacial surfaces, with their abundance and diversity influenced by the chemical and physical conditions of the supraglacial environment. This study analyzed an ice core from a mountain glacier in the Tien Shan Mountains to characterize the chemical solutes and mineral dust in glacial ice. The results showed variations in concentrations of chemical solutes and mineral dust with depth, and suggested that melting glacial ice could potentially impact supraglacial conditions and the growth of photoautotrophs on the ablating ice surface.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Laura Muntjewerf, William J. Sacks, Marcus Lofverstrom, Jeremy Fyke, William H. Lipscomb, Carolina Ernani da Silva, Miren Vizcaino, Katherine Thayer-Calder, Jan T. M. Lenaerts, Raymond Sellevold
Summary: Earth system/ice-sheet coupling is a recent major area of Earth System Model development, focusing on simulating the interactions between climate and ice sheets. The latest model includes simulations of the Greenland Ice Sheet, showing how ice sheet changes can impact climate change.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Engineering, Marine
Zhaolong Yu, Jorgen Amdahl
Summary: The study focuses on the threat of glacial ice to ships and offshore structures in the Arctic, proposing a numerical solver for coupled simulation accounting for hydrodynamic-ice-structure interaction. The solver is verified and calibrated to field data, and applied to simulate ice collisions on a semi-submersible platform column, discussing ice motion trajectories, crushing, and structural damage under different ice motions.
Article
Geosciences, Multidisciplinary
Jan Streffing, Dmitry Sidorenko, Tido Semmler, Lorenzo Zampieri, Patrick Scholz, Miguel Andres-Martinez, Nikolay Koldunov, Thomas Rackow, Joakim Kjellsson, Helge Goessling, Marylou Athanase, Qiang Wang, Jan Hegewald, Dmitry Sein, Longjiang Mu, Uwe Fladrich, Dirk Barbi, Paul Gierz, Sergey Danilov, Stephan Juricke, Gerrit Lohmann, Thomas Jung
Summary: In this paper, a new version of the AWI-CM3 model is introduced, which exhibits higher scientific skills and computational efficiency compared to its predecessors. The model incorporates the multi-resolution functionality of unstructured-mesh models while maintaining scalability and efficiency. Evaluation of the model's performance demonstrates its competitiveness and above-average representation of climatology at given resolutions.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Ming Zhang, Yonggang Liu, Jiang Zhu, Zhuoqun Wang, Zhengyu Liu
Summary: In this study, we investigated the changes in climate and Atlantic Meridional Overturning Circulation (AMOC) during the Last Glacial Maximum if there were no dust. Model simulations showed that the removal of dust resulted in a global cooling and weakening of AMOC. This cooling effect was opposite to that observed during the mid-Holocene and was amplified by a positive feedback between sea ice and AMOC.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Mohammad Farhat, Jacques Laskar, Gwenael Boue
Summary: The dynamical ellipticity of a planet is a parameter that describes the non-spherical mass distribution of the planet, affecting its precession, nutation, and rotational modes. Uncertainties in the Earth's dynamical ellipticity history impact the accuracy of solutions for the past evolution of the Earth-Moon system. Understanding the evolution of dynamical ellipticity is important for future astronomical calculations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Biology
Ashleigh V. S. Hood, Donald E. Penman, Maxwell A. Lechte, Malcolm W. Wallace, Jonathan A. Giddings, Noah J. Planavsky
Summary: The 'snowball Earth' hypothesis proposes that two intense glaciations occurred in the Neoproterozoic around 717-635 million years ago, impacting biogeochemical cycles. However, evidence from the Sturtian glaciation suggests continued carbonate precipitation and magnesium cycling, challenging previous assumptions. This may explain the extreme duration of the Sturtian glaciation.
Article
Geosciences, Multidisciplinary
Markus Drueke, Werner von Bloh, Stefan Petri, Boris Sakschewski, Sibyll Schaphoff, Matthias Forkel, Willem Huiskamp, Georg Feulner, Kirsten Thonicke
Summary: This study explains the coupling of the dynamic global vegetation model LPJmL5 with the climate model CM2Mc to form a new coupled model CM2Mc-LPJmL in order to simulate the impacts of land-use change on biophysical feedbacks of water and energy.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Environmental Sciences
Zhaopeng Wu, Tao Li, Jing Li, Chengyun Yang, Jun Cui
Summary: Simulation studies have shown the significant thermal effect of water ice clouds on the Martian atmosphere and climate. This work investigates the diurnal variations of water ice on Mars using multi-local time data, revealing a close correlation between thermal tide and water ice diurnal variations. The results suggest a low threshold of tidal amplitude for generating water ice diurnal variations and have implications for understanding the phase transition process in the Martian atmosphere and improving the Martian global climate model.
Article
Geosciences, Multidisciplinary
Katharina Hartmuth, Lukas Papritz, Maxi Boettcher, Heini Wernli
Summary: The effects of global warming in the Arctic are intensified, with rapidly rising temperatures and significant loss of sea ice. Changes in temperature and precipitation variability and extremes in the Arctic are regionally and seasonally dependent, strongly linked to sea-ice loss. Large-scale weather systems play a key role in shaping seasonal temperature and precipitation extremes in the Arctic, which persists under climate warming.
GEOPHYSICAL RESEARCH LETTERS
(2023)