Journal ArticleDOI
Soil Moisture and the Persistence of North American Drought
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TLDR
In this paper, the effects of soil moisture on North American summertime climate were performed using a 12-layer global atmospheric general circulation model, and it was found that a reduction in soil moisture leads to an increase in surface temperature, lower surface pressure, increased ridging aloft, and a northward shift of the jet stream.Abstract:
Numerical sensitivity experiments on the effects of soil moisture on North American summertime climate are performed using a 12-layer global atmospheric general circulation model. Consideration is given to the hypothesis that reduced soil moisture may induce and amplify warm, dry summers of midlatitude continental interiors. The simulations resemble the conditions of the summer of 1988, including an extensive drought over much of North America. It is found that a reduction in soil moisture leads to an increase in surface temperature, lower surface pressure, increased ridging aloft, and a northward shift of the jet stream. It is shown that low-level moisture advection from the Gulf of Mexico is important in the maintenance of persistent soil moisture deficits.read more
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Journal ArticleDOI
Abrupt climate change
Richard B. Alley,Jochem Marotzke,William D. Nordhaus,Jonathan T. Overpeck,Dorothy M. Peteet,Roger A. Pielke,Raymond T. Pierrehumbert,Peter B. Rhines,Thomas F. Stocker,Lynne D. Talley,John M. Wallace +10 more
TL;DR: Policy-makers should consider expanding research into abrupt climate change, improving monitoring systems, and taking actions designed to enhance the adaptability and resilience of ecosystems and economies.
Journal ArticleDOI
Soil Moisture–Atmosphere Interactions during the 2003 European Summer Heat Wave
TL;DR: The role of land surface-related processes and feedbacks during the record-breaking 2003 European summer heat wave is explored with a regional climate model in this article, where sensitivity experiments are performed by perturbing spring soil moisture in order to determine its influence on the formation of the heat wave.
Journal ArticleDOI
GLACE: The Global Land-Atmosphere Coupling Experiment. Part I: Overview
Randal D. Koster,Zhichang Guo,Paul A. Dirmeyer,Gordon B. Bonan,Edmond Chan,Peter M. Cox,Harvey Davies,C. T. Gordon,Shinjiro Kanae,Eva Kowalczyk,David M. Lawrence,Ping Liu,Cheng-Hsuan Lu,Sergey Malyshev,Bryant J. McAvaney,Kenneth E. Mitchell,David Mocko,Taikan Oki,Keith W. Oleson,Andrew J. Pitman,Yogesh C. Sud,Christopher M. Taylor,Diana Verseghy,R. Vasic,Yongkang Xue,Tomohito J. Yamada +25 more
TL;DR: The Global Land-Atmosphere Coupling Experiment (GLACE) as discussed by the authors is a model intercomparison study focusing on a typically neglected yet critical element of numerical weather and climate modeling: land-atmosphere coupling strength.
Journal ArticleDOI
A Soil Moisture–Rainfall Feedback Mechanism: 1. Theory and observations
TL;DR: Zheng et al. as discussed by the authors proposed a positive feedback mechanism between soil moisture and rainfall, which is based on considerations of the energy balance at the land-atmosphere boundary, in contrast to similar mechanisms that were proposed in the past and that were based on the concepts of water balance and precipitation recycling.
Journal ArticleDOI
The Soil–Precipitation Feedback: A Process Study with a Regional Climate Model
TL;DR: In this paper, month-long integrations with a regional climate model covering Europe and the Northern Atlantic are utilized to study the sensitivity of the summertime European precipitation climate with respect to the continental-scale soil moisture content.