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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Altitude profiles of cloud condensation nuclei characteristics across the Indo-Gangetic Plain prior to the onset of the Indian summer monsoon
Venugopalan Nair Jayachandran,S. Suresh Babu,Aditya Vaishya,Mukunda M. Gogoi,Vijayakumar S. Nair,Sreedharan Krishnakumari Satheesh,K. Krishna Moorthy +6 more
TL;DR: In this article, the altitude profiles of the concentration of cloud condensation nuclei (CCN), as a function of supersaturation, and aerosol optical properties were carried out aboard an instrumented aircraft across the Indo-Gangetic Plain (IGP) just prior to the onset of the Indian summer monsoon (ISM) of 2016.
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The relationship between latent heating, vertical velocity, and precipitation processes: The impact of aerosols on precipitation in organized deep convective systems
TL;DR: The results show that evaporative cooling is important for cold pool strength and rain enhancement in both cases, however, ice microphysics play a larger role in the midlatitude case compared to the tropical.
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Systematic satellite observations of the impact of aerosols from passive volcanic degassing on local cloud properties
TL;DR: In this article, the time-averaged indirect aerosol effects within 200 km downwind of island volcanoes are observed using MODIS, 2002-2013 and Advanced Along-Track Scanning Radiometer (AATSR) data.
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Distinct weekly cycles of thunderstorms and a potential connection with aerosol type in China
TL;DR: In this article, the authors identified distinct weekly cycles in thunderstorm activities and convection-associated variables in two regions of China dominated by different types of aerosol during the summers of 1983-2005.
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On the aerosol weekly cycle spatiotemporal variability over Europe
TL;DR: In this paper, the spatial and temporal variability of the aerosol weekly cycle over Europe as these were recorded from TERRA MODIS and AQUA MODIS satellite instruments were used to produce a weekly cycle index.
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