On Quasi-Biennial Oscillation in Air-Sea System     

邵永宁  陈隆勋 《大气科学进展》1991,(1)

From the COADS (Comprehensive Ocean-Atmosphere Data Set) I and the COADS II, we got a monthly data set of sea surface temperature (SST), zonal and meridional wind components at sea level (U,V) and sea level pressure (SLP) with 4°× 4° grid system covering the period from Jan. 1950 to Dec. 1987 to study the evolutional features of the quasi-biennial oscillation (QBO) in the air-sea system. The analytic method of complex empirical orthogonal function (CEOF) is used to obtain the composite temporal sequences of amplitude (six phases for half a period) for the first and the second main components of SST, U, V and SLP. It is shown from the results that the main characteristics for different phases of the sea surface temperature anomaly's (SSTA) QBO are warm water / cold water in the equator of the eastern Pacific (EEP). There are two warm or cold water centers of the SSTA in the EEP, which are located in the equator of the central Pacific (ECP) and the east part of the EEP. The features of the source propa  相似文献   

Modeling the East Asian climate during the last glacial maximum     

赵平  陈隆勋  周秀骥  巩远发  韩余 《中国科学D辑(英文版)》2003,46(10):1060-1068

Climatologists have been paying much attention to the global and regional climatic charac-teristics during the LGM. A lot of paleodata were obtained in East Asia during the LGM[1—5] and laid the firm foundation of reconstructing East Asian paleoclimate t…  相似文献   

NUMERICAL EXPERIMENT ON THE SEASONAL VARIATION OF GLOBAL OCEAN AND THE EL NINO PROCESS——PART Ⅱ:NUMERICAL EXPERIMENT ON THE 1972—1973 EL NINO PROCESS          下载免费PDF全文

徐峻  陈隆勋 《Acta Meteorologica Sinica》1994,(3)

In Part Ⅰ,the climatological state of the ocean has been simulated by integrating a 6-layer,4°×5°grid global oceanmodel up to 100 years.In this part,the forcing in 1971—1973 is calculated by COADS,and using the integrated result ofthe 100th year as the initial state,we simulated the El Nino process in 1972—1973.The results are as follows:(1)We have reproduced the 1972—1973 El Nino process and its cooling process in the equatorial eastern Pacific.The simulated distribution of SST and the intensity of El Nino are similar to the observations.(2)The results show that there are two kinds of processes in El Nino formation:(i)the warming occurs in the equa-torial western Pacific,then propagates eastward to the central Pacific;(ii)the warm water forms near the coast of theSouth America and then,propagates westward along the equator.Observation indicates that the two processes were in-cluded in the El Nino in 1972.Our numerical experiment can simulate out both of them,although the first process isstronger than the second.In observation,the intensities of both processes are similar.(3)The El Nino process in 1972 can be simulated by running the model with the wind stress forcing,but its intensityis 1/2 the magnitude of observation.Only after adding the forcing of heat flux to run the model,its intensity can coin-cide with the observation.So the forcing effect of heat flux should not be ignored in the formation of El Nino,especiallyin the study of El Nino intensity.  相似文献   

南海季风试验与东亚夏季风   总被引：66，自引：14，他引：66  

丁一汇  李崇银  何金海  陈隆勋  甘子钧  钱永甫  阎俊岳  王东晓  施平  方文东  许建平  李立 《气象学报》2004,62(5):561-586

南海季风试验是一次国际性大气与海洋的联合试验 ,旨在更好地了解南海季风的爆发、维持与变化 ,以改进东亚和东南亚地区的季风预报。 1998年 5～ 8月进行的外场试验取得了圆满成功 ,获得了大量气象与海洋资料。不少国家对这些资料进行四维资料同化 ,并改进数值模拟和预报 ;同时也为东亚与南海地区季风的研究提供了必要的资料集。文中总结了中国科学家在这方面的主要研究成果 ,共包括 6个方面 :(1)南海夏季风的爆发过程与机理 ;(2 )南海季风爆发过程中对流与中尺度系统的发展及其与大尺度环流的相互作用 ;(3)低频振荡与遥相关作用 ;(4 )南海海 气通量的测量及其与季风活动的关系 ;(5 )夏季风时期南海海洋的热力结构、环流和中尺度涡旋及其与ENSO事件的关系 ;(6 )南海与东亚季风的数值模拟。  相似文献   

春夏季节转换中西太平洋副热带高压东移与大尺度环流和温度场变化关系   总被引：4，自引：0，他引：4  

祝从文  陈隆勋  何金海 《热带气象学报》2004,20(5):493-504

分析了由春向夏的季节转换过程中西太平洋副热带高压与大尺度环流和温度场之间的变化关系.结果表明:4月份,西太平洋副热带高压开始表现出向东移动特征,6月份它与向西移动的北美副高在东太平洋120～160 (W区域合并.这一期间,沿15～20 (N之间的纬圈环流同时表现出向东移动特征,该纬圈环流的上升支位于南海-西太平洋暖池一带,下沉支主要位于东太平洋180 (～120 (W区域.伴随上述变化,位于北半球太平洋的局地Hadley环流在纬向随时间表现出东强西弱变化特点.西太平洋副高向东移动与15～20 (N之间的纬圈环流和130 (W东太平洋局地Hadley环流在15～25 (N上空交汇、下沉密切相关.在由春向夏季节转换中,大气和海表温度关于赤道季节转换速率沿纬向表现出东慢西快差异,上述变化为西太平洋副热带高压的向东移动提供了有利的气候背景.  相似文献   

青藏高原大气热量的简单计算方法及其应用   总被引：1，自引：2，他引：1  

韩余  徐海明  赵平  陈隆勋  何金海 《南京气象学院学报》2003,26(6):788-796

利用1961-1995年青藏高原及其邻近地区198个地面站月平均常规观测资料与青藏高原大气热量(〈Q1〉)资料,建立了一种计算青藏高原大气热量的简便方法.利用计算出的大气热量分析了各个季节青藏高原各地区〈Q1〉的气候特征,以及冬季高原〈Q1〉与春季大气环流场的关系.结果发现,各个季节高原东北部地区大气热量值都小于南部地区;高原各区大气热量在20世纪70年代到80年代初都表现出了显著的上升趋势.高原冬季热源与春季高原周围地区的位势高度场存在着明显的负相关,气候模拟证实了冬季高原地区热源变化对春季东亚大气环流的这种影响.  相似文献   

THE ATMOSPHERIC HEAT BUDGET OVER THE WESTERN PART OF THE TIBETAN PLATEAU DURING MONEX, 1979     

冯志强  Elmar R. Reiter  陈隆勋 《大气科学进展》1985,(4)

The atmospheric heat source strength over western Tibet has been computed for the period beginning with the last ten days in May, 1979 and extending through August, 1979. Our results show a significantly smaller heat source than that obtained by other authors. The discrepancy is mainly due to adjustments in the dray, coefficient suggested by observations and numerical modeling experiments. We subdivided western Tibet into northern and southern parts. In the north sensible heating, SH, provides the dominant input into the atmospheric heat source, whereas in the southern part latent heat, LP, offers a significant contribution after the start of the rainy season.Detailed heat budget calculations were also carried out over limited regions of southwestern Tibet which hau good station coverage. During periods with area-averaged rainfall ≤1 mm/day an atmospheric heat source maximum was located over southwestern Tibet near the 500 hPa level, while a heat sink dominated the upper troposphere in a layer of subsi  相似文献   

评“1960年的Elsasser辐射图与山本辐射图”兼对“几个幅射图解的比较”一文的意见     

陈隆勋  龚知本 《气象学报》1965,37(2):263-264

大气长波辐射的图解法最早由Mugge和Moller(1932)研究。Elsasser(1942)则提出便于使用的Elsasser辐射图解。此后,大量作者提出了许多新的图解,其中比较成功的为山本图解。1960年,Elsasser等根据最新的吸收光谱实验资料重新给出了辐射图解。在山本与Elsasser(1960)的论文中,用了很多篇幅讨论了广义吸收系数随温度的变化,并指出广义吸收系数随温度的变化对大气长波辐射传输起着重要作用。他  相似文献   

INTERANNUAL VARIATION OF INDEX OF EAST ASIAN LAND-SEA THERMAL DIFFERENCE AND ITS RELATION TO MONSOON CIRCULATION AND RAINFALL OVER CHINA   总被引：2，自引：0，他引：2  

孙秀荣  陈隆勋  何金海 《Acta Meteorologica Sinica》2001,(1)

This paper proposes an index of land-sea thermal difference(ILSTD)that describes its zonal andmeridional strength responsible for East Asian monsoon circulation to study its relation to the EastAsian monsoon circulation and the summer rainfall over China on an interannual basis.Results are asfollows:(1)ILSTD can be used to measure the strength of East Asian summer monsoon in such away that the strong(weak)ILSTD years are associated with strong(weak)summer monsooncirculation.(2)The index also reflects well summer rainfall anomaly over the eastern part of China.In the strong index years,rain belt is mainly located over the northern China,and serious droughtemerges in the Jianghuai valleys and mid-lower reaches of the Changjiang River,along with increaseof rainfall in North and South China,but in the weak years it is contrary.(3)Besides,the index hasobvious QBO and quasi 4-year oscillations,but the periods and amplitudes have significant changes onan interdecadal basis.  相似文献   

从气象卫星资料揭示的青藏高原夏季对流云系的日变化   总被引：14，自引：2，他引：12       下载免费PDF全文

陈隆勋  宋玉宽  刘骥平  王文 《气象学报》1999,57(5):549-560

文中利用日本静止气象卫星观测的1981～1994年1天8次的TBB观测值和1978～1994年NOAA卫星观测的1天2次OLR观测值研究了青藏高原地区夏季对流云系季节变化以及对流云的日变化及其东西向移动规律,并对1994年的资料进行了个例分析。结果表明,青藏高原夏季对流云有极为明显的日变化,以00～05SUTC为最弱,15～17UTC最强。在季风雨爆发后的7月中旬到8月上旬在高原中部（30～32°N,90°E）、东部（30°N,97°E）和西部（30°N,85～87°E）有3个TBB低值中心,多年月平均对流中心区云顶高度可达9．6km,而旬对流中心个别地区平均可达13km。对流云区开始发展于东部地区,随后对流云中心逐步向西移动,并于7月中下旬达到最西,此时西部地区从多年平均而言可以有短暂的强对流发展。  相似文献