Journal ArticleDOI
Flood or drought: How do aerosols affect precipitation?
Daniel Rosenfeld,Ulrike Lohmann,Graciela B. Raga,Colin D. O'Dowd,Markku Kulmala,Sandro Fuzzi,Anni Reissell,Meinrat O. Andreae +7 more
TLDR
A conceptual model is proposed that explains this apparent dichotomy of pristine tropical clouds with low CCN concentrations rain out too quickly to mature into long-lived clouds and heavily polluted clouds evaporate much of their water before precipitation can occur.Abstract:
Aerosols serve as cloud condensation nuclei (CCN) and thus have a substantial effect on cloud properties and the initiation of precipitation. Large concentrations of human-made aerosols have been reported to both decrease and increase rainfall as a result of their radiative and CCN activities. At one extreme, pristine tropical clouds with low CCN concentrations rain out too quickly to mature into long-lived clouds. On the other hand, heavily polluted clouds evaporate much of their water before precipitation can occur, if they can form at all given the reduced surface heating resulting from the aerosol haze layer. We propose a conceptual model that explains this apparent dichotomy.read more
Citations
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Journal ArticleDOI
First Surface Measurement of Cloud Condensation Nuclei over Kanpur, IGP: Role of Long Range Transport
TL;DR: In this paper, a large number of days in each season of the year 2008 and 2009 at Kanpur, North India were measured for cloud condensation nuclei (N CCN, number concentration at 0.38% average depleted supersaturation, SS) and submicron aerosol (N CN), using a Droplet Measurement Technology (MMT) and Scanning Mobility Particle Sizer (TSI) respectively.
Journal ArticleDOI
Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system
TL;DR: In this paper, the authors investigated the dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using the Weather Research and Forecasting Model with Chemistry (WRF-Chem) coupled with an aerosol data assimilation (DA) system.
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Non-Monotonic Aerosol Effect on Precipitation in Convective Clouds over Tropical Oceans
Huan Liu,Jianping Guo,Ilan Koren,Orit Altaratz,Guy Dagan,Yuan Wang,Jonathan H. Jiang,Panmao Zhai,Yuk L. Yung +8 more
TL;DR: It is shown that the aerosol optical depth value that marks the shift between invigoration and suppression depends on the environmental thermodynamic conditions, which can aid in better parameterizing aerosol effects in climate models for the prediction of climate trends.
Journal ArticleDOI
Effect of urbanization on lightning over four metropolitan cities of India
D. M. Lal,S. D. Pawar +1 more
TL;DR: In this paper, the authors analyzed the last 8 years (from 2001 to 2008) data of total lightning, Aerosol Optical Depth (AOD) and rainfall over two inland and two coastal metropolitan cities of India, to study the effect of urbanization on lightning.
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Evolution of aerosol research in India and the RAWEX-GVAX: an overview
TL;DR: A comprehensive overview of the development of aerosol-climate research in India and south Asia, and the accomplishment and newer issues that warranted the above field campaign are presented in this article.
References
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TL;DR: PfPMP1)与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用,在黏附及免疫逃避中起关键的作�ly.
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Aerosols, climate, and the hydrological cycle
TL;DR: Human activities are releasing tiny particles (aerosols) into the atmosphere that enhance scattering and absorption of solar radiation, which can lead to a weaker hydrological cycle, which connects directly to availability and quality of fresh water, a major environmental issue of the 21st century.
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Global indirect aerosol effects: a review
Ulrike Lohmann,Johann Feichter +1 more
TL;DR: In this article, the effects of aerosols on the climate system are discussed and different approaches how the climatic implications of these effects can be estimated globally as well as improvements that are needed in global climate models in order to better represent indirect aerosol effects are discussed.
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Climate Effects of Black Carbon Aerosols in China and India
TL;DR: A global climate model used to investigate possible aerosol contributions to trends in China and India found precipitation and temperature changes in the model that were comparable to those observed if the aerosols included a large proportion of absorbing black carbon (“soot”), similar to observed amounts.
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Inaugural Article by a Recently Elected Academy Member
Jian Xu,Jeffrey I. Gordon +1 more