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DOI: 10.1029/2019JD030358
WOS记录号: WOS:000481444200008
论文题名:
A Regional Climate Response of Middle Eastern, African, and South Asian Monsoon Regions to Explosive Volcanism and ENSO Forcing
作者: Dogar, Muhammad Mubashar1,2; Sato, Tomonori3
通讯作者: Dogar, Muhammad Mubashar
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN: 2169-897X
EISSN: 2169-8996
出版年: 2019
卷: 124, 期:14, 页码:7580-7598
语种: 英语
英文关键词: explosive eruptions ; ENSO ; monsoon system ; ITCZ ; Hadley cell
WOS关键词: ARCTIC OSCILLATION RESPONSE ; SURFACE-TEMPERATURE ; PINATUBO ERUPTION ; STRATOSPHERIC AEROSOLS ; NORTH-AFRICA ; EL CHICHON ; SUMMER ; IMPACTS ; MODEL ; VARIABILITY
WOS学科分类: Meteorology & Atmospheric Sciences
WOS研究方向: Meteorology & Atmospheric Sciences
英文摘要:

It is well observed that the monsoon climate experiences substantial climatic changes following explosive volcanism. Likewise, previous studies show that the monsoon climate regimes, especially, the African and South Asian tropical regions, are adversely affected by El Nino-Southern Oscillation (ENSO) events. Hence, studying the sensitivity of the monsoon regions to the effect of these forcing factors, that is, explosive volcanism and volcanic-induced ENSO forcing, is essential for better understanding the driving mechanism and climate variability in these regions. Using observations and a high resolution atmospheric model, effectively at 50- and 25-km grid spacing, this study shows that ENSO and tropical eruptions together weaken the upward branch of Northern Hemisphere (NH) Hadley cell, that is, Intertropical Convergence Zone. This results in a significant decrease of monsoonal precipitation, suggesting severe drought conditions over the NH tropical rain belt regions. The volcanic-induced direct radiative cooling and associated land-sea thermal contrast result in significant warming and drying due to the reduction of clouds over the monsoon regions in boreal summer. The posteruption ENSO circulation also results in warming and drying over NH tropical rain belt regions. This study confirms that the monsoon climate regime responds vigorously to posteruption direct radiative and indirect circulation impacts caused by volcanic-induced ENSO forcing. Hence, quantification of magnitude and spatial pattern of these postvolcanic direct and indirect climatic responses is important for better understanding of climate variability and changes in Asian and African monsoon regions.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/143784
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.King Abdullah Univ Sci & Technol, Earth Sci & Engn, Thuwal, Saudi Arabia
2.Minist Climate Change, Global Change Impact Studies Ctr, Islamabad, Pakistan
3.Hokkaido Univ, Fac Environm Earth Sci, Sapporo, Hokkaido, Japan

Recommended Citation:
Dogar, Muhammad Mubashar,Sato, Tomonori. A Regional Climate Response of Middle Eastern, African, and South Asian Monsoon Regions to Explosive Volcanism and ENSO Forcing[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019-01-01,124(14):7580-7598
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