DOI: 10.1002/2016GL071016
论文题名: Climate-vegetation interaction and amplification of Australian dust variability
作者: Evans S. ; Ginoux P. ; Malyshev S. ; Shevliakova E.
刊名: Geophysical Research Letters
ISSN: 0094-8395
EISSN: 1944-8126
出版年: 2016
卷: 43, 期: 22 起始页码: 11823
结束页码: 11830
语种: 英语
英文关键词: Australia
; dust emission
; dust variability
; dynamic vegetation
; ENSO
; parameterization
Scopus关键词: Atmospheric pressure
; Atmospheric radiation
; Climate models
; Climatology
; Nickel
; Parameterization
; Snow
; Soil moisture
; Vegetation
; Australia
; Dust emission
; Dynamic vegetation model
; ENSO
; General circulation model
; Land-surface process
; Precipitation anomalies
; Southern oscillation
; Dust
英文摘要: Observations show that Australian dust activity varies by a factor of 4 on decadal timescales. General circulation models, however, typically fail to simulate this variability. Here we introduce a new dust parameterization into the NOAA/Geophysical Fluid Dynamics Laboratory climate model CM3 that represents land surface processes controlling dust sources including soil water and ice, snow cover, vegetation characteristics, and land type. In an additional novel step, we couple this new dust parameterization to the dynamic vegetation model LM3. In Australia, the new parameterization amplifies the magnitude and timescale of dust variability and better simulates the El Niño–Southern Oscillation-dust relationship by more than doubling its strength. We attribute these improvements primarily to the slow response time of vegetation to precipitation anomalies and show that vegetation changes account for approximately 50% of enhanced dust emission during El Niño events. The amplified dust leads to radiative forcing over Australia greater than −1 and −20 W/m2 at top of atmosphere and surface, respectively. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85003794492&doi=10.1002%2f2016GL071016&partnerID=40&md5=c801a16dd797c4abd64524119b7ade69
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9358
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Princeton Environmental Institute, Princeton University, Princeton, NJ, United States
Recommended Citation:
Evans S.,Ginoux P.,Malyshev S.,et al. Climate-vegetation interaction and amplification of Australian dust variability[J]. Geophysical Research Letters,2016-01-01,43(22).