Inertial theory of the mean Hadley circulation under the condition of nonstatic equilibrium     

CHAO Jiping  LIU Fei 《中国科学D辑(英文版)》2006,49(5):546-553

1 Introduction The mean meridional circulation plays an important role in the transportation and balance of heat, momen- tum, vortex and vapor between different latitudes. According to the data analysis, there are three circula- tions from the equator to the polar area: the Hadley circulation, a heat-driven circulation which rises around the equator and sinks at a certain latitude; the subpolar circulation, another heat-driven circulation around the polar area; and the Ferrel circulation, an i…  相似文献   

COMPARISON OF ON-LINE COUPLED AND CONSTANT TRANSFER SIMULATION METHODS FOR DIRECT RADIATIVE FORCING OF ANTHROPOGENIC SULFATE     

WU Jian  LIU Hong-nian  WANG Wei-guo  LIU Gang 《热带气象学报(英文版)》2006,12(1)

1 INTRODUCTION Of three main methods for studying the radiative forcing of anthropogenic sulfate and climatic response on the regional scale, the first is, with given rates for transforming SO2 to sulfate, converting actually released SO2 into sulfate and acquiring the distribution of sulfate by computing transfer equations in the climate model.  相似文献   

一次暴雨过程的螺旋度分布特征分析   总被引：1，自引：1，他引：1       下载免费PDF全文

《气象与环境科学》2007,30(B09):115-119

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Soil organic carbon storage and soil CO<Subscript>2</Subscript> flux in the alpine meadow ecosystem     

Tao Zhen  Shen ChengDe  Gao QuanZhou  Sun YanMin  Yi WeiXi  Li YingNian 《中国科学D辑(英文版)》2007,50(7):1103-1114

High-resolution sampling, measurements of organic carbon contents and ¹⁴C signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of ¹⁴C tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO₂ flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12×10⁴ kg C hm⁻² to 30.75×10⁴ kg C hm⁻² in the alpine meadow ecosystems, with an average of 26.86×10⁴ kg C hm⁻². Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO₂ flux ranges from 103.24 g C m⁻² a⁻¹ to 254.93 gC m⁻² a⁻¹, with an average of 191.23 g C m⁻² a⁻¹. The CO₂ efflux produced from microbial decomposition of organic matter varies from 73.3 g C m⁻² a⁻¹ to 181 g C m⁻² a⁻¹. More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%281.23% of total CO₂ emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research. Supported by the National Natural Science Foundation of China (Grant Nos. 40231015, 40471120 and 40473002) and the Guangdong Provincial Natural Science Foundation of China (Grant No. 06300102)  相似文献   

Study on Two Categories of Sudden Stratospheric Warming   总被引：1，自引：0，他引：1       下载免费PDF全文

ZHANG Hengde  GAO Shouting  LU Weisong 《Acta Meteorologica Sinica》2007,21(4):450-464

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弱二次切变流轴对称涡旋演变的解析研究     

衡骏遥  周伟灿 《南京气象学院学报》2007,30(1):72-78

运用格林函数方法,给出了弱二次切变流轴对称涡旋演变的解析解.结果表明:当环境流中弱二次切变强度增加(减少)时,扰动动能的最大值增加(减小),扰动动能的变化加速(减速);而扰动涡旋的范围对扰动动能的大小与变化也存在一定的影响.  相似文献   

Three-dimensional simulation of horseshoe vortex and local scour around a vertical cylinder using an unstructured finite-volume technique     

《国际泥沙研究》2020,35(3):295-306

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非线性惯性重力内波的特征及天气意义     

李国平  陶建玲 《成都信息工程学院学报》1998,(1)

对大气非线性惯笥重力内波方程组,利用相平面分析法导出了相应的ＫｄＶ方程。采用直接积分法求出两类有意义的孤立波解,讨论了波解的基本特征,并着重分析了一类奇异孤立波与某些天气系统（如青藏高原５００ｈＰａ低涡）的可能联系。  相似文献   

Coping with the 1996 Tornado in Tangail,Bangladesh: An Analysis of Field Data     

Bimal Kanti Paul 《The Professional geographer》1998,50(3):287-301

On May 13, 1996, a disastrous tornado hit the Tangail district of Bangladesh, killing more than 700 people and causing extensive damage to homes, crops, and livestock. This paper explores and analyzes how tornado victims adjusted to this destruction. Data collected from two study sites show that victims received emergency assistance from people both in neighboring areas and from more distant areas, as well as from government agencies and non-governmental organizations (NGOs). At both sites, NGOs played the leading role in minimizing the hardships of victims through extraordinary disaster relief and rehabilitation efforts. Because of the extensive support received, the tornado victims were able to return to their “normal” lives very quickly. This study concludes with several recommendations to help cope with future tornado disasters.  相似文献   

Chemical ozone loss in the Arctic vortex in the winter 1995–96: HALOE measurements in conjunction with other observations     

R. Müller  J.-U. Grooß  D. S. McKenna  P. J. Crutzen  C. Brühl  J. M. Russell III  L. L. Gordley  J. P. Burrows  A. F. Tuck 《Annales Geophysicae》1998,17(1):101-114

Severe chemical ozone loss has been detected in the Arctic in the winter and spring of 1995–96 by a variety of methods. Extreme reductions in column ozone due to halogen catalysed chemistry were derived from measurements of the Halogen Occultation Experiment (HALOE) on board the Upper Atmosphere Research Satellite in the Arctic vortex. Here, we discuss further aspects of the HALOE observations in the Arctic over this period. Potential problems, both in the data themselves and in the methodology of the data analysis are considered and the reason for the differences between the Arctic ozone losses deduced from HALOE data version 17 and 18 is analysed. Moreover, it is shown that HALOE measurements in the Arctic in winter and spring 1995–96 compare well with observations by other ground-based and satellite instruments.  相似文献