Tuesday, January 26, 2021 - 12:00pm
Maurice Ewing and J. Lamar Worzel Professor, Columbia University
Compound soil and atmospheric dryness events and their feedback on the biosphere
Future terrestrial carbon uptake remains too uncertain. Those uncertainties are in large part due to water stress. However water stress is not just due to soil moisture stress but also to atmospheric aridity. Yet the contribution of soil versus atmospheric aridity on the terrestrial carbon cycle remains unclear as they are highly anti-correlated. Correctly attributing their impact is however critical as atmospheric aridity is expected to increase dramatically in the future while soil moisture will vary much less. This presentation will discuss the interaction between soil moisture and atmospheric aridity, their impact on terrestrial carbon uptake in models and strategies for better observing their relative contributions in order to inform model refinement of water stress. Finally, I will present ongoing work using new tools to better address those questions.
Pierre Gentine is the Maurice Ewing and J. Lamar Worzel professor of geophysics in the departments of Earth and Environmental Engineering and Earth and Environmental Sciences. He obtained his MSc and PhD at MIT in 2007 and 2010 respectively. Pierre’s work focuses on the terrestrial hydrologic and carbon cycles using multiscale and computational approaches. Pierre obtained several awards in the past including the NSF CAREER, DOE early career and NASA New investigator awards, as well as the Clarence Meisinger award from the American Meteorological Society and the Global Environmental Change early career award from the American Geophysical Union.
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