GSTDTAP  > 地球科学
DOI10.5194/acp-17-6243-2017
Effect of anthropogenic aerosol emissions on precipitation in warm conveyor belts in the western North Pacific in winter - a model study with ECHAM6-HAM
Joos, Hanna1; Madonna, Erica1,2,3; Witlox, Kasja1,4; Ferrachat, Sylvaine1; Wernli, Heini1; Lohmann, Ulrike1
2017-05-22
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:10
文章类型Article
语种英语
国家Switzerland; Norway
英文摘要

While there is a clear impact of aerosol particles on the radiation balance, whether and how aerosol particles influence precipitation is controversial. Here we use the ECHAM6-HAM global climate model coupled to an aerosol module to analyse whether an impact of anthropogenic aerosol particles on the timing and amount of precipitation can be detected in North Pacific warm conveyor belts. Warm conveyor belts are the strongest precipitation-producing airstreams in extratropical cyclones and are identified here with a Lagrangian technique, i.e. by objectively identifying the most strongly ascending trajectories in North Pacific cyclones. These conveyor belts have been identified separately in 10-year ECHAM6-HAM simulations with present-day and pre-industrial aerosol conditions. Then, the evolution of aerosols and cloud properties has been analysed in detail along the identified warm conveyor belt trajectories. The results show that, under present-day conditions, some warm conveyor belt trajectories are strongly polluted (i.e. high concentrations of black carbon and sulfur dioxide) due to horizontal transport from eastern Asia to the oceanic region where warm conveyor belts start their ascent. In these polluted trajectories a weak delay and reduction of precipitation formation occurs compared to clean warm conveyor belt trajectories. However, all warm conveyor belts consist of both polluted and clean trajectories at the time they start their ascent, and the typically more abundant clean trajectories strongly reduce the aerosol impact from the polluted trajectories. The main conclusion then is that the overall amount of precipitation is comparable in pre-industrial conditions, when all warm conveyor belt trajectories are clean, and in present-day conditions, when warm conveyor belts consist of a mixture of clean and polluted trajectories.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000401801100004
WOS关键词PART I ; CLIMATOLOGY ; SENSITIVITY ; CLOUDS ; CYCLONES
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/30725
专题地球科学
作者单位1.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland;
2.Univ Bergen, Inst Geophys, Bergen, Norway;
3.Bjerknes Ctr Climate Res, Bergen, Norway;
4.Zurich Insurance Co Ltd, Zurich, Switzerland
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GB/T 7714
Joos, Hanna,Madonna, Erica,Witlox, Kasja,et al. Effect of anthropogenic aerosol emissions on precipitation in warm conveyor belts in the western North Pacific in winter - a model study with ECHAM6-HAM[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(10).
APA Joos, Hanna,Madonna, Erica,Witlox, Kasja,Ferrachat, Sylvaine,Wernli, Heini,&Lohmann, Ulrike.(2017).Effect of anthropogenic aerosol emissions on precipitation in warm conveyor belts in the western North Pacific in winter - a model study with ECHAM6-HAM.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(10).
MLA Joos, Hanna,et al."Effect of anthropogenic aerosol emissions on precipitation in warm conveyor belts in the western North Pacific in winter - a model study with ECHAM6-HAM".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.10(2017).
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