3D Global Climate Simulations of Synthetic Mars Warming

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1. Très proche Pas pertinent

   A research roadmap for assessing the feasibility of warming Mars

   E. S. Kite, A. Essunfeld, M. H. Hecht et al. · 2026 · Instrumentation and Methods for Astrophysics · cité 2 fois · Résumé IA disponible

   Résumé scientifique

   This roadmap outlines research pathways to determine whether Mars could be warmed with non-biological methods. It does not presuppose that warming Mars is desirable; its purpose is to identify what would need to be true for Mars to be warmed, what it would cost, and what could go wrong. Three complementary research tracks appear promising. Solid-state greenhouse membranes offer local warming, aiding water harvesting, food production, and oxygen supply near human bases. Orbiting reflectors can warm key sites such as bases and CO$_2$-ice reservoirs, although a large combined area would be required. Strengthening Mars' natural greenhouse effect might warm large regions or the globe, although ma…

2. Proche Pas pertinent

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   Edwin S. Kite, Michael A. Mischna, Bowen Fan et al. · 2022 · Science Advances 8(21), (2022) · cité 26 fois · Pas encore résumé

   Résumé scientifique

   Early Mars had rivers, but the cause of Mars' wet-to-dry transition remains unknown. Past climate on Mars can be probed using the spatial distribution of climate-sensitive landforms. We analyzed global databases of water-worked landforms and identified changes in the spatial distribution of rivers over time. These changes are simply explained by comparison to a simplified meltwater model driven by an ensemble of global climate model simulations, as the result of $\gtrsim$10 K global cooling, from global average surface temperature (T) $\ge$ 268 K to T $\sim$ 258 K, due to a weaker greenhouse effect. In other words, river-forming climates on Early Mars were warm and wet first, and cold and we…

3. Proche Pas pertinent

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   James E. Hansen, Makiko Sato, Leon Simons et al. · 2022 · Atmospheric and Oceanic Physics · cité 269 fois · Résumé IA disponible

   Résumé scientifique

   Improved knowledge of glacial-to-interglacial global temperature change implies that fast-feedback equilibrium climate sensitivity is at least ~4{\deg}C for doubled CO2 (2xCO2), with likely range 3.5-5.5{\deg}C. Greenhouse gas (GHG) climate forcing is 4.1 W/m2 larger in 2021 than in 1750, equivalent to 2xCO2 forcing. Global warming in the pipeline is greater than prior estimates. Eventual global warming due to today's GHG forcing alone -- after slow feedbacks operate -- is about 10{\deg}C. Human-made aerosols are a major climate forcing, mainly via their effect on clouds. We infer from paleoclimate data that aerosol cooling offset GHG warming for several millennia as civilization developed. …

4. Proche Pas pertinent

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   Gianmario Broccia · 2021 · Earth and Planetary Astrophysics · preprint, non relu par les pairs · Pas encore résumé

   Résumé scientifique

   This thesis work aims to study the possibility of energy production on Martian soil and, in particular, to establish what might be an optimal configuration for an energy system. This goal has been contextualized in the will to feed a scientific base, based the concept of "Mars Direct" (Robert Zubrin, 1990). This habitat has been recreated in its thermal features, in order to perform an analysis of the heat loss over a Martian year (1,88 terrestrial years). As part of this analysis, two possible scenarios have been studied: clear sky with medium solar radiation ("sun season") and sand storm season ("storm season"). Subsequently, a basic life support system have been simulated thanks to Aspen …

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   H. Rashid · 2026 · Geophysical Research Letters · Pas encore résumé

   Résumé scientifique

   Climate models with identical anthropogenic forcings simulate different historical warming, mainly because aerosol forcing is poorly constrained. The role of uncertainty in regional aerosol forcing, however, has not been systematically studied. Using a large ensemble of CMIP6 models, I demonstrate that anthropogenic aerosol‐forced North Atlantic (NA) sea‐surface temperature variability significantly modulates greenhouse gas‐driven global‐mean surface air temperature (GMST) increases in historical simulations, explaining 6.8 (±0.7)% of the ensemble‐mean GMST change. This effect varies widely across models. Consequently, models with strong NA forcing tend to underestimate anthropogenic global …

6. Proche Pas pertinent

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   Résumé scientifique

   Record-breaking heat extremes are becoming more likely due to anthropogenic climate change, with their probability depending on the regional warming rate. Anthropogenic aerosol forcing modulates these warming rates, and aerosols are declining globally. However, the influence of aerosols on the probability of record-breaking heat extremes remains unclear. Here, we assess how aerosol trends alter record-breaking heat probabilities by combining idealized simulations, CESM2 all-forcing and single-forcing large ensemble simulations, Regional Aerosol Model Intercomparison Project (RAMIP) future aerosol scenarios, and ERA5/MERRA-2 reanalysis data. In reanalysis data, there is a statistically signif…

7. Apparenté Pas pertinent

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   Jaylynn M. Brunelli, M. Diamond · 2026 · Earth's Future · Pas encore résumé

   Résumé scientifique

   As the goals of the Paris Agreement struggle to be met, interest in stratospheric aerosol injection (SAI) has increased due to its potential to reduce the impacts of anthropogenic warming. SAI would aim to cool the Earth by injecting sulfate aerosols or their precursors into the stratosphere, reflecting incoming sunlight back to space. Previous work has shown that SAI could produce regionally varying temperature and precipitation impacts, however, along with global mean drying. Climate classification systems serve as a potentially useful tool in quantifying how concerning these impacts may be. We evaluate the effectiveness of SAI by identifying the types and magnitude of climate zone changes…

8. Apparenté Pas pertinent

   Contrasting aerosol–cloud feedbacks across a warming Arctic

   Samuel De Xun Chua, Herbert G. Hartl, M. Boyer et al. · 2026 · Nature Geoscience · Pas encore résumé

   Résumé scientifique

   In the rapidly warming Arctic, the feedback between aerosols and clouds is a major source of uncertainty in projections of future climate. One source of this uncertainty is the role of new particle formation, which produces aerosol particles that can subsequently grow into cloud condensation nuclei, thereby influencing Arctic cloud formation. Here harmonized field aerosol observations across the Arctic spanning 2003–2024, alongside satellite-derived data, were analysed to quantify trends in new particle formation and estimate their climatic implications across the Arctic region. Three distinct aerosol regimes, with contrasting contributions of new particle formation to cloud condensation nuc…

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2. Apparenté Pas pertinent

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   Résumé scientifique

   Abstract It is widely believed that the carbonate–silicate cycle is the main agent, through volcanism, to trigger deglaciations by CO2 greenhouse warming on Earth and on Earth-like planets when they get in a frozen state. Here we use a 3D Global Climate Model to simulate the ability of planets initially completely frozen to escape from glaciation episodes by accumulating enough gaseous CO2. The model includes CO2 condensation and sublimation processes and the water cycle. We find that planets with Earth-like characteristics (size, mass, obliquity, rotation rate, etc.) orbiting a Sun-like star may never be able to escape from a glaciation era, if their orbital distance is greater than ∼1.27 A…