نتایج جستجو برای: cloud microphysics

تعداد نتایج: 87468  

2002
M. Sengupta T. P. Ackerman E. E. Clothiaux

Clouds are important players in the global radiation budget with low-level water clouds being one of the most influential types. Classified as stratocumulus and stratus, these water clouds cover 34% of oceans and 18% of land at any given time (Considine et al. 1997). A 50% plus global coverage, a high albedo when compared to the ocean, and temperatures comparable to the surface causes the low s...

2006
A. Marshak J. V. Martins V. Zubko Y. J. Kaufman

Cloud development, the onset of precipitation and the effect of aerosol on clouds depend on the structure of the cloud profiles of droplet size and phase. Aircraft measurements of cloud profiles are limited in their temporal and spatial extent. Satellites were used to observe cloud tops not cloud profiles with vertical profiles of precipitation-sized droplets anticipated from CloudSat. The rece...

Journal: :Quarterly Journal of the Royal Meteorological Society 2023

Cloud microphysics parametrizations control the transfer of water between phases and hydrometeor species in numerical weather prediction climate models. As a fundamental component modelling systems cloud can determine intensity timing precipitation, extent longevity cover its impact on radiative balance, directly influence near surface metrics such as temperature wind. In this paper we introduc...

2010
W. R. Leaitch U. Lohmann L. M. Russell T. Garrett N. C. Shantz D. Toom-Sauntry J. W. Strapp K. L. Hayden

Airborne measurements from two consecutive days, analysed with the aid of an aerosol-adiabatic cloud parcel model, are used to study the effect of carbonaceous aerosol particles on the reflectivity of sunlight by water clouds. The measurements, including aerosol chemistry, aerosol microphysics, cloud microphysics, cloud gust velocities and cloud light extinction, were made below, in and above s...

2002
Hongli Jiang Graham Feingold William R. Cotton

[1] Numerical simulations of a cloudy marine boundary layer (MBL) observed during the Atlantic Stratocumulus Transition Experiment were performed to study the influence of entrainment of free tropospheric cloud condensation nuclei (CCN) on cloud microphysics, dynamics, and radiative properties. The initial CCN concentration is 100 cm 3 in one simulation, while in the second simulation it varies...

2004
W. C. Conant T. M. VanReken T. A. Rissman V. Varutbangkul H. H. Jonsson A. Nenes J. L. Jimenez A. E. Delia R. Bahreini G. C. Roberts R. C. Flagan J. H. Seinfeld

[1] Our understanding of the activation of aerosol particles into cloud drops during the formation of warm cumulus clouds presently has a limited observational foundation. Detailed observations of aerosol size and composition, cloud microphysics and dynamics, and atmospheric thermodynamic state were collected in a systematic study of 21 cumulus clouds by the Center for Interdisciplinary Remotel...

2009
J. J. SHI C. PETERS-LIDARD G. SKOFRONICK-JACKSON S. RUTLEDGE

One of the grand challenges of the Global Precipitation Measurement (GPM) mission is to improve coldseason precipitation measurements in midand high latitudes through the use of high-frequency passive microwave radiometry. For this purpose, the Weather Research and Forecasting model (WRF) with the Goddard microphysics scheme is coupled with a Satellite Data Simulation Unit (WRF–SDSU) to facilit...

2003
Fu-Lung Chang Zhanqing Li

[1] Chang and Li [2002] proposed a new cloud microphysics retrieval technique that can estimate the vertical profile of droplet effective radius (DER) for water clouds using multispectral near-infrared (NIR) measurements. The underlying principle of the retrieval technique is that radiance measurements at distinct multi-NIR wavelengths possess different penetration depths inside the cloud and t...

2017
Micael A. Cecchini

This paper describes an attempt by the authors to use gamma function fitted using cloud macroand microphysical observations to analyze microphysical growing path and particle size distribution evolution within deep convective clouds. The data used in this study are from ACRIDICON-CHUVA field campaign over Amazon, primarily six flights focusing on cloud microphysics measurements over regions wit...

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