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Search Results: 1 - 10 of 32525 matches for " Huang Meiyuan "
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Improving the vorticity-streamfunction method to solve two-dimensional anelastic and nonhydrostatic model
Improving the Vorticity-Streamfunction Method to Solve Two-Dimensional Anelastic and Nonhydrostatic Model

Sun Litan,Huang Meiyuan,
Sun Litan
,Huang Meiyuan

大气科学进展 , 1994,
Abstract: The potential temperature vorticity has been introduced to polish the (momentum) vorticity-streamfunction method for solving the two-dimensional and nonhydrostatic model with much accuracy but not many increments of computation. The three-step procedure introduced in the present paper can be used to solve both shallow and deep dynamic models.

Huang Meiyuan,Hong Yanchao,

大气科学进展 , 1984,
Abstract: The structure of radar echo in stratiform cloud which was found in mei-yu frontal cloud system is generally inhomogeneous, especially in the structure of bright band echoes. The inhomogeneous structure of warm region in stratiform cloud and the shower feature of precipitation are closely related to the inhomogeneous structure of bright band and convective cells embedded in stratiform cloud.During Summer time the mei-yu cloud system is an important precipitating system in the southern part of China. To study its structure is of great significance for weather forecast and understanding the physical processes of cloud and precipitation. Therefore, we have observed mei-yu frontal cloud system by use of 711 type radar (3 cm) and airplane at Tunxi, Anhui Province since 1979. It was found that the structure of stratiform cloud, especially the structure of its warm region appears to be inhomogeneous1),2). This is a significant feature of cloud structure in mei-yu frontal cloud system. In this paper, we shall further analyse this inhomogeneous structure of stratiform cloud and study its effect on the precipitation.
Urgent Problems and Thinking of Development for Precipitation Enhancement in China

HUANG Meiyuan,

气候与环境研究 , 2011,
Abstract: Research in precipitation enhancement around the world has a history of over sixty years.Over those decades,there have been significant development and progress in precipitation enhancement.However,until now,many scientific and technological problems associated with precipitation enhancement demand urgent solution.Hence,we have to improve the scientific and technological level.First of all,research in some critical technologies such as prediction of seeded clouds,indexes for selecting clouds,and optimizatio...
Three-Dimensional Numerical Simulations of the Effects of a Cold Water Surface on the Evolution and Propagation of Thunderstorms
Kong Fanyou,Huang Meiyuan,Xu Huaying,
Kong Fanyou
,Huang Meiyuan,Xu Huaying

大气科学进展 , 1993,
Abstract: The influences of large areas of semi-unbounded cold water surface on the evolution, propagation and precipitation production of thunderstorms are simulated by using a fully elastic three-dimensional numerical hailstorm model. Real sounding profiles for temperature, humidity and wind are employed. The model has successfully simulated the significant modification of the propagation path of thunderstorms near the cold water area. The path change can be either' along-bank' or' toward-bank', depending on the position of the storm system relative to convergence zone of the water-land circulation. The simulations also show that thunderstorms developing or propagating within the convergence zone of local circulation will be intensified and produce much heavier hail, whereas those over cold water surface or the air that has been cooled by the water will be strongly inhibited.The influence of the cold water surface on thunderstorm characters is largely dependent upon the direction and intensity of the low-level wind.
A Model for Long-range Transport of Yellow-sand in East Asia

Huang Meiyuan,Wang Zifa,

大气科学 , 1998,
Abstract: A new mobilization model, which is suitable to apply for modeling and forecast of yellow-sand transport for North China, is developed with analysis of observed mobilization data of meteorological stations in North China. Based on the model, a long-range transport model for yellow-sand is developed and applied to East Asia. It considers the parameterization of dry and wet deposition, the spectrum of yellow-sand and the micro-physical process in detail. Comparison with observation data proves that the model has good ability to reappear the process of the transport of yellow-sand.
Numerical Simulation of Tropospheric Ozone over China

He Dongyang,Huang Meiyuan,

大气科学 , 1993,
Abstract: A three - dimensional Eulerian model for tropospheric ozone simulation was developed. Considered all factors that affect ozone photochemical transformation and characteristics of photochemical pollution in China, a coupling method of photochemical reactions in model was proposed to avoid the calculating complexity caused by chemical dynamic equations. According to ozone observation results, parameterization of influence of clouds on tropospheric ozone was studied and a cloud consuming rate of ozone is specified by numerical tests. Through numerical simulation the averaged distribution of tropospheric ozone (especially surface layer ozone) over China, its seasonal changes and some characteristics of distribution of Chinese urban photochemical pollution were studied.

He dongyang,Huang Meiyuan,

环境科学学报 , 1992,
Abstract: Based on"counter species"analysis to the photochemical mechanism, a photochemical model for regional air quality is developed.The model can preciesely simulate chemical characteristics important photochemical species, such as NOx, O3, H2O2. The model has good simulation capacity and its form is very simple form.
Gas-Phase Chemical Model for SO2 and Its Sensitive Analysis

Gao Huiwang,Huang Meiyuan,

气候与环境研究 , 1997,
Abstract: A gas chemistry model is developed with 52 chemical reactions and 31 species. The sensitivities of SO 2 oxidation rate to temperature, humidity, initial values of SO 2 and NMHC and the intensity of sun light are studied. The changes of SO 2 oxidation rate from day to night are also discussed.
A Classification Method to Analyze the Chemical Characteristics of Precipitation

Cheng Xinjin,Huang Meiyuan,

气候与环境研究 , 1998,
Abstract: In the analysis and comparing of the chemical characteristics of precipitation in different areas, if we list the concrete data of all ions, it is very complicated and difficult to get the conclusion. In this paper, we suggest a simplified method to do it. First, we summarize some most important characteristics with representative alphabets, then divide these characteristics into different levels with representative Arabic numerals. By using a group of this kind of alphebets and numerals, we can describe and compare the main chemical characteristics of precipitation in different area. Based on the generally used observed data, we analyse and compare the typical chemical characteristics of precipitation in the three main acid rain areas.
孙立潭 Sun Litan,黄美元 Huang Meiyuan
大气科学 , 1996, DOI: 10.3878/j.issn.1006-9895.1996.03.06
Abstract: 本文应用守恒型非弹性模式研究了三维非静力平衡大气中平行切变流上重力内波的不稳定,推广了Miles定理和半圆定理,得到了有限深度气层的半椭圆定理。该定理指出不稳定波的复波速被限制在相速复平面上一个内接于霍华德(Howard)半圆的半椭圆内。该半椭圆长轴重合于半圆的直径,而短轴则取决于最小Ri数、波长、波宽等因素。
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