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
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Journal ArticleDOI
Thunderstorm and stratocumulus: how does their contrasting morphology affect their interactions with aerosols?
TL;DR: In this article, the effect of aerosols on clouds on the morphology of clouds is investigated and it is shown that aerosols can suppress the conversion of droplets to rain (i.e., so-called autoconversion), leading to an increased intensity of downdrafts.
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A multi-angle aerosol optical depth retrieval algorithm for geostationary satellite data over the United States
H. Zhang,Alexei Lyapustin,Yuhang Wang,Shobha Kondragunta,Istvan Laszlo,Pubu Ciren,Raymond M. Hoff +6 more
TL;DR: In this article, a modified Multi-Angle Implementation of Atmospheric Correction (MAIAC) algorithm was proposed for the GOES imager by applying a modified MAIAC algorithm.
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High rise in carbonaceous aerosols under very low anthropogenic emissions over eastern Himalaya, India: Impact of lockdown for COVID-19 outbreak.
Abhijit Chatterjee,Sauryadeep Mukherjee,Monami Dutta,Abhinandan Ghosh,Sanjay K. Ghosh,Arindam Roy +5 more
TL;DR: Concentration weighted trajectory (CWT) analysis showed that the anthropogenic activities over Nepal and forest fire over north-east India were the major long-distant sources of the CA over Darjeeling during the normal period and during lockdown, which indicates the immense importance of Himalayan biosphere as a major source of organic carbon.
Journal ArticleDOI
Modeling the influences of aerosols on pre-monsoon circulation and rainfall over Southeast Asia
Dongmin Lee,Dongmin Lee,Dongmin Lee,Yogesh C. Sud,Lazaros Oreopoulos,Kyu-Myong Kim,William K. M. Lau,In-Sik Kang +7 more
TL;DR: In this article, the role of biomass burning aerosol (BBA) emissions in Southeast Asia (SEA) in the pre-monsoon period of February-May is investigated. And the authors find that BBA affects liquid clouds in statistically significantly ways, increasing cloud droplet number concentrations, decreasing droplet effective radii (i.e., a classic aerosol indirect effect), and locally suppressing precipitation due to a deceleration of the autoconversion process, with the latter effect apparently also leading to cloud condensate increases.
Journal ArticleDOI
Paradoxical side effects of green advertising: how purchasing green products may instigate licensing effects for consumers with a weak environmental identity
TL;DR: This article showed that purchasing a green product may have paradoxical post-purchase effects, such that it may lower intentions to engage in subsequent environmentally friendly behavior (a so-called licensing effect).
References
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疟原虫var基因转换速率变化导致抗原变异[英]/Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
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.
Journal ArticleDOI
Inaugural Article by a Recently Elected Academy Member
Jian Xu,Jeffrey I. Gordon +1 more