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
More filters
Journal ArticleDOI
A cosmic ray-climate link and cloud observations
TL;DR: In this paper, the authors examined evidence of a cosmic ray cloud link from a range of sources, including satellite-based cloud measurements and long-term ground-based climatological measurements.
Journal ArticleDOI
Estimating glaciation temperature of deep convective clouds with remote sensing data
Tianle Yuan,Tianle Yuan,J. Vanderlei Martins,J. Vanderlei Martins,Zhanqing Li,Lorraine A. Remer +5 more
TL;DR: In this article, the authors proposed a technique to estimate the DCC glaciation temperature using passive remote sensing data based on a conceptual model of vertical hydrometeor size profiles inside DCCs.
Journal ArticleDOI
Mechanisms Contributing to Suppressed Precipitation in Mt. Hua of Central China. Part I: Mountain Valley Circulation
TL;DR: In this article, an improved weather research and forecasting model with online coupled chemistry (WRF-Chem) is applied and simulations are conducted at the convection permitting scale to explore the major mechanisms governing changes in precipitation from orographic clouds in the Mt. Hua area in central China.
Journal ArticleDOI
Fluorescence spectroscopy of atmospherically relevant bacterial and fungal spores and potential interferences
TL;DR: In this paper, single-particle fluorescence spectroscopy was used to study fluorescence properties of fungal spores and bacteria, selected for their possible atmospheric relevance, and aromatic organic acid aerosols, potentially interfering with laser induced fluorescence measurement, were studied.
Journal ArticleDOI
Assessment of the aerosol distribution over Indian subcontinent in CMIP5 models
TL;DR: In this article, the authors examined the aerosol distribution over Indian subcontinent as represented in 21 models from Coupled Model Intercomparison Project Phase 5 (CMIP5) simulations, wherein model simulated aerosol optical depth (AOD) is compared with MODIS satellite observations.
References
More filters
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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