DOI: 10.5194/cp-11-253-2015
Scopus记录号: 2-s2.0-84923305106
论文题名: A comparison of model simulations of Asian mega-droughts during the past millennium with proxy reconstructions
作者: Fallah B. ; Cubasch U.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2015
卷: 11, 期: 2 起始页码: 253
结束页码: 263
语种: 英语
Scopus关键词: circulation modeling
; climate modeling
; climate variation
; comparative study
; global climate
; Little Ice Age
; paleoclimate
; proxy climate record
; reconstruction
; trade wind
; Asia
英文摘要: Two PMIP3/CMIP5 climate model ensemble simulations of the past millennium have been analysed to identify the occurrence of Asian mega-droughts. The Palmer drought severity index (PDSI) is used as the key metric for the data comparison of hydro-climatological conditions. The model results are compared with the proxy data of the Monsoon Asia Drought Atlas (MADA). Our study shows that global circulation models (GCMs) are capable of capturing the majority of historically recorded Asian monsoon failures at the right time and with a comparable spatial distribution. The simulations indicate that El Ninõ-like events lead, in most cases, to these droughts. Both model simulations and proxy reconstructions point to fewer monsoon failures during the Little Ice Age. The results suggest an influential impact of volcanic forcing on the atmosphere-ocean interactions throughout the past millennium. During historic mega-droughts of the past millennium, the monsoon convection tends to assume a preferred regime described as a "break" event in Asian monsoon. This particular regime is coincident with a notable weakening in the Pacific trade winds and Somali Jet. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49174
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Fallah B.,Cubasch U.. A comparison of model simulations of Asian mega-droughts during the past millennium with proxy reconstructions[J]. Climate of the Past,2015-01-01,11(2)