DOI: 10.1007/s00382-015-2671-5
Scopus记录号: 2-s2.0-84959113205
论文题名: Preferred response of the East Asian summer monsoon to local and non-local anthropogenic sulphur dioxide emissions
作者: Dong B. ; Sutton R.T. ; Highwood E.J. ; Wilcox L.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-05-06 起始页码: 1733
结束页码: 1751
语种: 英语
英文关键词: Aerosol–radiation and aerosol–cloud interactions
; East Asian summer monsoon
; Fast responses
; Land–sea thermal contrast
英文摘要: In this study, the atmospheric component of a state-of-the-art climate model (HadGEM2-ES) that includes earth system components such as interactive chemistry and eight species of tropospheric aerosols considering aerosol direct, indirect, and semi-direct effects, has been used to investigate the impacts of local and non-local emissions of anthropogenic sulphur dioxide on the East Asian summer monsoon (EASM). The study focuses on the fast responses (including land surface feedbacks, but without sea surface temperature feedbacks) to sudden changes in emissions from Asia and Europe. The initial responses, over days 1–40, to Asian and European emissions show large differences. The response to Asian emissions involves a direct impact on the sulphate burden over Asia, with immediate consequences for the shortwave energy budget through aerosol–radiation and aerosol–cloud interactions. These changes lead to cooling of East Asia and a weakening of the EASM. In contrast, European emissions have no significant impact on the sulphate burden over Asia, but they induce mid-tropospheric cooling and drying over the European sector. Subsequently, however, this cold and dry anomaly is advected into Asia, where it induces atmospheric and surface feedbacks over Asia and the Western North Pacific (WNP), which also weaken the EASM. In spite of very different perturbations to the local aerosol burden in response to Asian and European sulphur dioxide emissions, the large scale pattern of changes in land–sea thermal contrast, atmospheric circulation and local precipitation over East Asia from days 40 onward exhibits similar structures, indicating a preferred response, and suggesting that emissions from both regions likely contributed to the observed weakening of the EASM. Cooling and drying of the troposphere over Asia, together with warming and moistening over the WNP, reduces the land–sea thermal contrast between the Asian continent and surrounding oceans. This leads to high sea level pressure (SLP) anomalies over Asia and low SLP anomalies over the WNP, associated with a weakened EASM. In response to emissions from both regions warming and moistening over the WNP plays an important role and determines the time scale of the response. © 2015, The Author(s). 资助项目: NERC, Natural Environment Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53776
Appears in Collections: 过去全球变化的重建
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作者单位: National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Dong B.,Sutton R.T.,Highwood E.J.,et al. Preferred response of the East Asian summer monsoon to local and non-local anthropogenic sulphur dioxide emissions[J]. Climate Dynamics,2016-01-01,46(2017-05-06)