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DOI | 10.1175/JCLI-D-17-0799.1 |
The Sensitivity of Land-Atmosphere Coupling to Modern Agriculture in the Northern Midlatitudes | |
McDermid, Sonali Shukla1,2; Montes, Carlo2; Cook, Benjamin I.2,3; Puma, Michael J.2,3,4; Kiang, Nancy Y.2; Aleinov, Igor2,3 | |
2019 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:2页码:465-484 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Modern agricultural land cover and management are important as regional climate forcings. Previous work has shown that land cover change can significantly impact key climate variables, including turbulent fluxes, precipitation, and surface temperature. However, fewer studies have investigated how intensive crop management can impact background climate conditions, such as the strength of land-atmosphere coupling and evaporative regime. We conduct sensitivity experiments using a state-of-the-art climate model with modified vegetation characteristics to represent modern crop cover and management, using observed crop-specific leaf area indexes and calendars. We quantify changes in land-atmosphere interactions and climate over intensively cultivated regions situated at transitions between moisture- and energy-limited conditions. Results show that modern intensive agriculture has significant and geographically varying impacts on regional evaporative regimes and background climate conditions. Over the northern Great Plains, modern crop intensity increases the model simulated precipitation and soil moisture, weakening hydrologic coupling by increasing surface water availability and reducing moisture limits on evapotranspiration. In the U.S. Midwest, higher growing season evapotranspiration, coupled with winter and spring rainfall declines, reduces regional soil moisture, while crop albedo changes also reduce net surface radiation. This results overall in reduced dependency of regional surface temperature on latent heat fluxes. In central Asia, a combination of reduced net surface energy and enhanced pre-growing season precipitation amplify the energy-limited evaporative regime. These results highlight the need for improved representations of agriculture in global climate models to better account for regional climate impacts and interactions with other anthropogenic forcings. |
英文关键词 | Atmosphere-land interaction Climate sensitivity Feedback |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000454292200002 |
WOS关键词 | MODIS-LAI PRODUCT ; COVER CHANGES ; SUMMER PRECIPITATION ; MULTISCALE ANALYSIS ; CLIMATE ; IRRIGATION ; MANAGEMENT ; IMPACTS ; TEMPERATURE ; VALIDATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21231 |
专题 | 气候变化 |
作者单位 | 1.NYU, Dept Environm Studies, New York, NY 10003 USA; 2.NASA, Goddard Inst Space Studies, New York, NY 10025 USA; 3.Columbia Univ, Ctr Climate Syst Res, New York, NY USA; 4.Columbia Univ, Ctr Climate & Life, New York, NY USA |
推荐引用方式 GB/T 7714 | McDermid, Sonali Shukla,Montes, Carlo,Cook, Benjamin I.,et al. The Sensitivity of Land-Atmosphere Coupling to Modern Agriculture in the Northern Midlatitudes[J]. JOURNAL OF CLIMATE,2019,32(2):465-484. |
APA | McDermid, Sonali Shukla,Montes, Carlo,Cook, Benjamin I.,Puma, Michael J.,Kiang, Nancy Y.,&Aleinov, Igor.(2019).The Sensitivity of Land-Atmosphere Coupling to Modern Agriculture in the Northern Midlatitudes.JOURNAL OF CLIMATE,32(2),465-484. |
MLA | McDermid, Sonali Shukla,et al."The Sensitivity of Land-Atmosphere Coupling to Modern Agriculture in the Northern Midlatitudes".JOURNAL OF CLIMATE 32.2(2019):465-484. |
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