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pro vyhledávání: '"Graham, R. J."'
Approximately one billion years (Gyr) in the future, as the Sun brightens, Earth's carbonate-silicate cycle is expected to drive CO$_2$ below the minimum level required by vascular land plants, eliminating most macroscopic land life. Here, we couple
Externí odkaz:
http://arxiv.org/abs/2409.10714
Autor:
Graham, R. J., Pierrehumbert, R. T.
Implicit in the definition of the classical circumstellar habitable zone (HZ) is the hypothesis that the carbonate-silicate cycle can maintain clement climates on exoplanets with land and surface water across a range of instellations by adjusting atm
Externí odkaz:
http://arxiv.org/abs/2405.05396
Publikováno v:
Journal of Geophysical Research: Planets, 127, e2022JE007456
Cycling of carbon dioxide between the atmosphere and interior of rocky planets can stabilize global climate and enable planetary surface temperatures above freezing over geologic time. However, variations in global carbon budget and unstable feedback
Externí odkaz:
http://arxiv.org/abs/2210.00149
Publikováno v:
The Planetary Science Journal (2021), 2, 207
Central stages in the evolution of rocky, potentially habitable planets may play out under atmospheric conditions with a large inventory of non-dilute condensable components. Variations in condensate retention and accompanying changes in local lapse
Externí odkaz:
http://arxiv.org/abs/2108.12902
Autor:
Graham, R. J.
The nearly logarithmic radiative impact of CO$_2$ means that planets near the outer edge of the liquid water habitable zone (HZ) require $\sim$10$^6$x more CO$_2$ to maintain temperatures conducive to standing liquid water on the planetary surface th
Externí odkaz:
http://arxiv.org/abs/2104.01224
Autor:
Graham, R. J., Pierrehumbert, R. T.
The "liquid water habitable zone" (HZ) concept is predicated on the ability of the silicate weathering feedback to stabilize climate across a wide range of instellations. However, representations of silicate weathering used in current estimates of th
Externí odkaz:
http://arxiv.org/abs/2004.14058
According to the Snowball Earth hypothesis, Earth has experienced periods of low-latitude glaciation in its deep past. Prior studies have used general circulation models (GCMs) to examine the effects such an extreme climate state might have on the st
Externí odkaz:
http://arxiv.org/abs/1909.12717
Autor:
Checlair, Jade H., Abbot, Dorian S., Webber, Robert J., Feng, Y. Katherina, Bean, Jacob L., Schwieterman, Edward W., Stark, Christopher C., Robinson, Tyler D., Kempton, Eliza, Alcabes, Olivia D. N., Apai, Daniel, Arney, Giada, Cowan, Nicolas, Domagal-Goldman, Shawn, Dong, Chuanfei, Fleming, David P., Fujii, Yuka, Graham, R. J., Guzewich, Scott D., Hasegawa, Yasuhiro, Hayworth, Benjamin P. C., Kane, Stephen R., Kite, Edwin S., Komacek, Thaddeus D., Kopparapu, Ravi K., Mansfield, Megan, Marounina, Nadejda, Montet, Benjamin T., Olson, Stephanie L., Paradise, Adiv, Popovic, Predrag, Rackham, Benjamin V., Ramirez, Ramses M., Rau, Gioia, Reinhard, Chris, Renaud, Joe, Rogers, Leslie, Walkowicz, Lucianne M., Warren, Alexandra, Wolf, Eric. T.
Provided that sufficient resources are deployed, we can look forward to an extraordinary future in which we will characterize potentially habitable planets. Until now, we have had to base interpretations of observations on habitability hypotheses tha
Externí odkaz:
http://arxiv.org/abs/1903.05211
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Autor:
Abbot, Dorian S., Bloch-Johnson, Jonah, Checlair, Jade, Farahat, Navah X., Graham, R. J., Plotkin, David, Popovic, Predrag, Spaulding-Astudillo, and Francisco
The ice-albedo feedback on rapidly-rotating terrestrial planets in the habitable zone can lead to abrupt transitions (bifurcations) between a warm and a snowball (ice-covered) state, bistability between these states, and hysteresis in planetary clima
Externí odkaz:
http://arxiv.org/abs/1801.10551