DOI: 10.1175/JCLI-D-17-0515.1
Scopus记录号: 2-s2.0-85048193039
论文题名: Land-cover change and the "Dust Bowl" drought in the U.S. Great Plains
作者: Hu Q. ; Torres-Alavez J.A. ; Van Den Broeke M.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 12 起始页码: 4657
结束页码: 4667
语种: 英语
英文关键词: Atmosphere-land interaction
; Drought
; Dynamics
Scopus关键词: Climate change
; Drought
; Dust
; Dynamics
; Moisture
; Oceanography
; Surface waters
; Atmosphere-land interactions
; High-resolution models
; Land surface conditions
; Land-cover change
; Large-scale circulation
; Sea surface temperature anomalies
; Societal impacts
; Tropical Pacific ocean
; Landforms
; atmosphere-biosphere interaction
; atmospheric dynamics
; drought
; dust storm
; land cover
; moisture flux
; sea surface temperature
; temperature anomaly
; Great Plains
; United States
英文摘要: The North American Dust Bowl drought during the 1930s had devastating environmental and societal impacts. Comprehending the causes of the drought has been an ongoing effort in order to better predict similar droughts and mitigate their impacts. Among the potential causes of the drought are sea surface temperature (SST) anomalies in the tropical Pacific Ocean and strengthened local sinking motion as a feedback to degradation of the land surface condition leading up to and during the drought. Limitations on these causes are the lack of a strong tropical SST anomaly during the drought and lack of local anomaly in moisture supply to undercut the precipitation in the U.S. Great Plains. This study uses high-resolution modeling experiments and quantifies an effect of the particular Great Plains land cover in the 1930s that weakens the southerly moisture flux to the region. This effect lowers the average precipitation, making the Great Plains more susceptible to drought. When drought occurs, the land-cover effect enhances its intensity and prolongs its duration. Results also show that this land-cover effect is comparable in magnitude to the effect of the 1930s large-scale circulation anomaly. Finally, analysis of the relationship of these two effects suggests that while lowering the precipitation must have contributed to the Dust Bowl drought via the 1930s land-cover effect, the initiation of and recovery from that drought would likely result from large-scale circulation changes, either of chaotic origin or resulting from combinations of weak SST anomalies and other forcing. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111522
Appears in Collections: 气候减缓与适应
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作者单位: School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, United States; Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
Recommended Citation:
Hu Q.,Torres-Alavez J.A.,Van Den Broeke M.S.. Land-cover change and the "Dust Bowl" drought in the U.S. Great Plains[J]. Journal of Climate,2018-01-01,31(12)