DOI: 10.1007/s00382-015-2968-4
Scopus记录号: 2-s2.0-84961680251
论文题名: Twenty-first century projected summer mean climate in the Mediterranean interpreted through the monsoon-desert mechanism
作者: Cherchi A. ; Annamalai H. ; Masina S. ; Navarra A. ; Alessandri A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-07-08 起始页码: 2361
结束页码: 2371
语种: 英语
英文关键词: CMIP5 projections
; Mediterranean climate
; Monsoon-desert
英文摘要: The term “monsoon-desert mechanism” indicates the relationship between the diabatic heating associated with the South Asian summer monsoon rainfall and the remote response in the western sub-tropics where long Rossby waves anchor strong descent with high subsidence. In CMIP5 twenty-first century climate scenarios, the precipitation over South Asia is projected to increase. This study investigates how this change could affect the summer climate projections in the Mediterranean region. In a linear framework the monsoon-desert mechanism in the context of climate change would imply that the change in subsidence over the Mediterranean should be strongly linked with the changes in South Asian monsoon precipitation. The steady-state solution from a linear model forced with CMIP5 model projected precipitation change over South Asia shows a broad region of descent in the Mediterranean, while the results from CMIP5 projections differ having increased descent mostly in the western sector but also decreased descent in parts of the eastern sector. Local changes in circulation, particularly the meridional wind, promote cold air advection that anchors the descent but the barotropic Rossby wave nature of the wind anomalies consisting of alternating northerlies/southerlies favors alternating descent/ascent locations. In fact, the local mid-tropospheric meridional wind changes have the strongest correlation with the regions where the difference in subsidence is largest. There decreased rainfall is mostly balanced by changes in moisture, omega and in the horizontal advection of moisture. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53510
Appears in Collections: 过去全球变化的重建
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作者单位: Centro Euromediterraneo sui Cambiamenti Climatici, and Istituto Nazionale di Geofisica e Vulcanologia, Bologna, Italy; International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI, United States; Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile, Rome, Italy
Recommended Citation:
Cherchi A.,Annamalai H.,Masina S.,et al. Twenty-first century projected summer mean climate in the Mediterranean interpreted through the monsoon-desert mechanism[J]. Climate Dynamics,2016-01-01,47(2017-07-08)