نتایج جستجو برای: updraft

تعداد نتایج: 524  

Journal: :Energies 2023

A thermal energy storage–updraft gasification device is a type of reactor that should be considered for use in solid waste research can save energy. However, the operating parameters and internal flow field during its operation remain unclear. In this study, numerical model storage–solid based on computational fluid dynamics dense discrete phase (CFD-DDPM) which had almost never been used befor...

Journal: :Atmospheric Chemistry and Physics 2021

Abstract. Convective clouds are common and play a major role in Earth's water cycle energy balance; they may even develop into storms cause severe rainfall events. To understand the convective cloud development process, this study investigates impact of aerosols on by considering influence both topography diurnal variation radiation. By combining texture analysis, clustering, thresholding metho...

2014
GERALD M. HEYMSFIELD LIN TIAN LIHUA LI MATTHEW MCLINDEN JAIME I. CERVANTES

A new dual-frequency (Ku and Ka band) nadir-pointing Doppler radar on the high-altitude NASA ER-2 aircraft, called the High-Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP), has collected data over severe thunderstorms in Oklahoma and Kansas during the Midlatitude Continental Convective Clouds Experiment (MC3E). The overarching motivation for this study is to understand the behavior of...

2011
Ji Nie Zhiming Kuang

7 Responses of shallow cumuli to large-scale temperature/moisture perturbations are examined 8 through diagnostics of large-eddy-simulations (LES) of the undisturbed Barbados Oceano9 graphic and Meteorological Experiment (BOMEX) case and a stochastic parcel model. The 10 perturbations are added instantaneously and allowed to evolve freely afterwards. The par11 cel model reproduces most of the c...

2008
Hongli Jiang Graham Feingold Haflidi H. Jonsson Miao-Ling Lu Patrick Y. Chuang Richard C. Flagan John H. Seinfeld

[1] We present statistical comparisons of properties of clouds generated by Large Eddy Simulations (LES) with aircraft observations of nonprecipitating, warm cumulus clouds made in the vicinity of Houston, TX during the Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS), carried out in the summer of 2006. Aircraft data were sampled with the Center for Interdisciplinary Remotely ...

2001
Naomi KUBA H. IWABUCHI K. MARUYAMA T. HAYASAKA T. TAKEDA

The influence of aerosols on the atmospheric radiative budget, as seen in the effect of cloud condensation nuclei (CCN) on the optical properties of clouds, for example, is one of the key issues in understanding and predicting global climate change. To study quantitatively the effect of CCN on the optical properties of low-level layer clouds, we developed a cloud microphysical adiabatic parcel ...

2011
N. Mazarakis C. J. Anderson

The sensitivity of quantitative precipitation forecasts to various modifications of the Kain-Fritsch (KF) convective parameterization scheme (CPS) is examined for twenty selected cases characterized by intense convective activity and widespread precipitation over Greece, during the warm period of 2005–2007. The study is conducted using the MM5 model with a two nested domains strategy, with hori...

2000
M. Teshiba H. Hashiguchi S. Fukao

Typhoon 9707 (Opal) was observed with the VHF-band Middle and Upper atmosphere (MU) radar, an L-band boundary layer radar (BLR), and a vertical-pointing C-band meteorological radar at the Shigaraki MU Observatory in Shiga prefecture, Japan on 20 June 1997. The typhoon center passed about 80 km southeast from the radar site. Mesoscale precipitating clouds developed due to warmmoist airmass trans...

2011
Jasmine Rémillard Pavlos Kollias Edward Luke Robert Wood

The recent deployment of the ARM Mobile Facility at the Graciosa Island, Azores in the context of the Clouds, Aerosol and Precipitation in the Marine Boundary Layer (CAPMBL) field campaign added the most extensive and comprehensive dataset of MBL clouds to date (April 2009–December 2010). Cloud occurrence is high (60–80%) with a summertime minimum. Liquid precipitation, diagnosed as the detecti...

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