Exceptional atmospheric circulation during the "Dust Bowl"

被引：30

作者：

Broennimann, S. ^{[1
]}

Stickler, A. ^{[1
]}

Griesser, T. ^{[1
]}

Ewen, T. ^{[1
]}

Grant, A. N. ^{[1
]}

Fischer, A. M. ^{[1
]}

Schraner, M. ^{[1
]}

Peter, T. ^{[1
]}

Rozanov, E. ^{[1
,2
]}

Ross, T. ^{[3
]}

机构：

[1] ETH, Inst Atmospher & Climate Sci, CH-8092 Zurich, Switzerland

[2] WRC, PMOD, CH-7260 Davos, Switzerland

[3] NOAA, Natl Climat Data Ctr, Asheville, NC 28801 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

瑞士国家科学基金会;

关键词：

LOW-LEVEL JET; CHEMISTRY-CLIMATE MODEL; NORTH-AMERICAN DROUGHT; CENTRAL UNITED-STATES; GREAT-PLAINS; HEAT WAVES; VARIABILITY; SUMMER; TRANSPORT; MOISTURE;

D O I：

10.1029/2009GL037612

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The three-dimensional, regional and large-scale atmospheric circulation during the "Dust Bowl" is analyzed based on newly available historical upper-air data and reconstructed upper-level fields. The Great Plains Low Level Jet, transporting moisture into the region, was weakened on its eastern side, shallower, and penetrated less far north than during wet years. Nocturnal convection was likely suppressed by increased stability. Strong mid-tropospheric ridging was found over the Great Plains, and upper-tropospheric flow anomalies extended from the North Pacific across North America to the Atlantic. These findings provide a dynamical view of the "Dust Bowl" droughts, some aspects of which are distinct from other droughts. It is demonstrated that this is important for assessing predictive capabilities of current modeling systems. Citation: Bronnimann, S., A. Stickler, T. Griesser, T. Ewen, A. N. Grant, A. M. Fischer, M. Schraner, T. Peter, E. Rozanov, and T. Ross (2009), Exceptional atmospheric circulation during the "Dust Bowl," Geophys. Res. Lett., 36, L08802, doi:10.1029/2009GL037612.

引用

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