DOI: 10.1029/2017JD027563
Scopus记录号: 2-s2.0-85047725642
论文题名: Transport Variability of Very Short Lived Substances From the West Indian Ocean to the Stratosphere
作者: Fiehn A. ; Quack B. ; Marandino C.A. ; Krüger K.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 10 起始页码: 5720
结束页码: 5738
语种: 英语
英文关键词: Asian monsoon
; ENSO
; Indian ocean
; stratosphere
; VSLS transport
英文摘要: Halogen- and sulfur-containing compounds are supersaturated in the surface ocean, which results in their emission to the atmosphere. These compounds can be transported to the stratosphere, where they impact ozone, the background aerosol layer, and climate. In this study we calculate the seasonal and interannual variability of transport from the West Indian Ocean (WIO) surface to the stratosphere for 2000–2016 with the Lagrangian transport model FLEXPART using ERA-Interim meteorological fields. We investigate the transport relevant for very short lived substances (VSLS) with tropospheric lifetimes corresponding to dimethylsulfide (1 day), methyl iodide (CH3I, 3.5 days), bromoform (CHBr3, 17 days), and dibromomethane (CH2Br2, 150 days). The stratospheric source gas injection of VSLS tracers from the WIO shows a distinct annual cycle associated with the Asian monsoon. Over the 16-year time series, a slight increase in source gas injection from the WIO to the stratosphere is found for all VSLS tracers and during all seasons. The interannual variability shows a relationship with sea surface temperatures in the WIO as well as the El Niño–Southern Oscillation. During boreal spring of El Niño, enhanced stratospheric injection of VSLS from the tropical WIO is caused by positive sea surface temperature anomalies and enhanced vertical uplift above the WIO. During boreal fall of La Niña, strong injection is related to enhanced atmospheric upward motion over the East Indian Ocean and a prolonged Indian summer monsoon season. Related physical mechanisms and uncertainties are discussed in this study. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113886
Appears in Collections: 气候减缓与适应
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作者单位: Meteorology and Oceanography Section, Department of Geosciences, University of Oslo, Oslo, Norway; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Now at Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Germany
Recommended Citation:
Fiehn A.,Quack B.,Marandino C.A.,et al. Transport Variability of Very Short Lived Substances From the West Indian Ocean to the Stratosphere[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)