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DOI	10.5194/acp-21-13425-2021
	Climate impact of volcanic eruptions: The sensitivity to eruption season and latitude in MPI-ESM ensemble experiments
	Zhuo Z.; Kirchner I.; Pfahl S.; Cubasch U.
发表日期	2021
ISSN	1680-7316
起始页码	13425
结束页码	13442
卷号	21 期号:17
英文摘要	Explosive volcanic eruptions influence near-surface temperature and precipitation especially in the monsoon regions, but the impact varies with different eruption seasons and latitudes. To study this variability, two groups of ensemble simulations are performed with volcanic eruptions in June and December at 0g representing an equatorial eruption (EQ) and at 30g g N and 30g g S representing Northern and Southern Hemisphere eruptions (NH and SH). Results show significant cooling especially in areas with enhanced volcanic aerosol content. Compared to the EQ eruption, stronger cooling emerges in the Northern Hemisphere after the NH eruption and in the Southern Hemisphere after the SH eruption. Stronger precipitation variations occur in the tropics than in the high latitudes. Summer and winter eruptions lead to similar hydrological impacts. The NH and the SH eruptions have reversed climate impacts, especially in the regions of the South Asian summer monsoon (SASM). After the NH eruption, direct radiative effects of volcanic aerosols induce changes in the interhemispheric and land-sea thermal contrasts, which move the intertropical convergence zone (ITCZ) southward and weaken the SASM. This reduces the moisture transport from the ocean and reduces cloud formation and precipitation in India. The subsequent radiative feedbacks due to regional cloud cover lead to warming in India. After the SH eruption, vice versa, a northward movement of the ITCZ and strengthening of the SASM, along with enhanced cloud formation, lead to enhanced precipitation and cooling in India. This emphasizes the sensitivity of regional climate impacts of volcanic eruptions to eruption latitude, which relates to the dynamical response of the climate system to radiative effects of volcanic aerosols and the subsequent regional physical feedbacks. Our results indicate the importance of considering dynamical and physical feedbacks to understand the mechanism behind regional climate responses to volcanic eruptions and may also shed light on the climate impact and potential mechanisms of stratospheric aerosol engineering. © Copyright:
语种	英语
scopus关键词	climate effect; cooling; ensemble forecasting; explosive volcanism; Northern Hemisphere; precipitation (climatology); Southern Hemisphere; volcanic aerosol; volcanic eruption
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246598
作者单位	Institute of Meteorology, Freie Universität Berlin, Berlin, 12165, Germany
推荐引用方式 GB/T 7714	Zhuo Z.,Kirchner I.,Pfahl S.,et al. Climate impact of volcanic eruptions: The sensitivity to eruption season and latitude in MPI-ESM ensemble experiments[J],2021,21(17).
APA	Zhuo Z.,Kirchner I.,Pfahl S.,&Cubasch U..(2021).Climate impact of volcanic eruptions: The sensitivity to eruption season and latitude in MPI-ESM ensemble experiments.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Zhuo Z.,et al."Climate impact of volcanic eruptions: The sensitivity to eruption season and latitude in MPI-ESM ensemble experiments".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).