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1.
AnIntroductiontotheNewBook-GEOSTROPHICWAVECIRCULATIONS¥Yong.L.McHallDept.ofEarth,AtmosphericandPlanetarySciences,MITPublished...  相似文献   

2.
ALow-orderModelofTwo-dimensionalFluidDynamicsontheSurfaceofaSphereMozhengWei(CRCforSouthernHemisphereMeteorology,CSIRODivisio...  相似文献   

3.
RegionalandSynoptic-scaleFeaturesAsociatedwithInactivePeriodsoftheSummerMonsoonoverSouthChina①C.H.SoandJohnnyC.L.ChanDepartme...  相似文献   

4.
AFinite-ModeModelofIdealFluidDynamicsonthe2-SphereWeiMozhengCRCforSouthernHemisphereMeteorologyCSIRODivisionofAtmosphericRese...  相似文献   

5.
SomeAspectsoftheCharacteristicsofMonsoonDisturbancesUsingaCombinedBarotropic-BaroclinicModel¥N.R.ParijaandS.K.Dash(CentreforA...  相似文献   

6.
Behaviour of Coupled Modes in a Simple Nonlinear Air-Sea Interaction ModelLiChongyinandLiaoQinghai(LASG,InstituteofAtmospheri...  相似文献   

7.
TheEffectofWeakShear-inducedMotiononBrownianCoagulationofAerosolParticlesWinjingsons(C.S.Win)(温景嵩)(Departmentofphysics,Nankai...  相似文献   

8.
SHORT-TERMCLIMATECHANGEANDITSCAUSEANDCLIMATEPREDICTIONINCHINA¥WeiFengying(魏凤英)(InstituteofSynopticandDynamicMeteorology.)Beij...  相似文献   

9.
WAM模式是继1980-1983年美、日、英、德、荷兰等国的海洋专家组成SWAMP研究组,针对世界各国十个有代表性的海浪数值模式,进行分类和对比试验研究之后,西欧一些国家自1985年起,由S.Hasselmann、K.Hasselmann、E.Bauer、P.A.E.M.Janssen、G.J.Komen、L.Bertotti、P.Lionello、 A.Guillaume、V.C.Cardone  相似文献   

10.
The East Asian Monsoon Simulation with IAP AGCMs-A Composite StudyWangHuijunandBiXunqiang(InstituteofAtmosphericPhysics(IAP),...  相似文献   

11.
Subseasonal variability during the South China Sea summer monsoon onset   总被引:7,自引:5,他引:2  
Analysis of the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) data for the period 1998–2007 reveals large subseasonal fluctuations in sea surface temperature (SST) of the South China Sea during the summer monsoon onset. These subseasonal SST changes are closely related to surface heat flux anomalies induced by surface wind and cloud changes in association with the summer monsoon onset. The SST changes feed back on the atmosphere by modifying the atmospheric instability. The results suggest that the South China Sea summer monsoon onset involves ocean–atmosphere coupling on subseasonal timescales. While the SST response to surface heat flux changes is quick and dramatic, the time lag between the SST anomalies and the atmospheric convection response varies largely from year to year. The spatial–temporal evolution of subseasonal anomalies indicates that the subseasonal variability affecting the South China Sea summer monsoon onset starts over the equatorial western Pacific, propagates northward to the Philippine Sea, and then moves westward to the South China Sea. The propagation of these subseasonal anomalies is related to the ocean–atmosphere interaction, involving the wind-evaporation and cloud-radiation effects on SST as well as SST impacts on lower-level convergence over the equatorial western Pacific and atmospheric instability over the Philippine Sea and the South China Sea.  相似文献   

12.
南海季风试验研究   总被引:15,自引:2,他引:13  
介绍了"九五"国家攀登项目"南海季风试验"外场观测系统和主要结果.该试验是一次旨在了解南海季风爆发,维持和变化主要物理过程的大气与海洋联合试验,是由十几个国家与地区参加的一次大型国际合作项目.通过1998年5~8月的外场观测试验,取得了大量和多种大气与海洋的加密观测资料,为南海和东亚季风及其与海洋的相互作用研究提供了比较完善的资料集.目前研究正在深入阶段.作者只是对这个试验的一般情况作了说明.  相似文献   

13.
南海夏季风活动及其影响   总被引:77,自引:15,他引:62       下载免费PDF全文
李崇银  张利平 《大气科学》1999,23(3):257-266
资料分析及其同南亚(印度)夏季风的比较,指出建立的突发性和经向分量的重要性是南海夏季风活动的两个最基本特征。根据南海夏季风经向分量与纬向分量同样重要的特征,并考虑南海地区大气环流的基本形势,提出了用对流层高低层散度差构成季风指数,它可以更好地描写南海夏季风的活动。资料分析和大气环流模式(GCM)数值模拟试验都清楚地表明南海夏季风年际异常对大气环流和气候有极为重要的影响,不仅影响东亚地区,而且通过东亚-太平洋-美洲(PJ或称EPA)波列影响美国的天气气候变化。  相似文献   

14.
利用变差度诊断分析,分析讨论了亚洲夏季风建立及前后(4月1日至6月30日)气候风场变差度的时空特征,发现北半球在4月10日和21日、5月15日和31日、6月11日和28日分别有6次大气环流大调整;变差度的大值区则均位于广义季风区;变差度确实是诊断大气环流调整和研究广义季风的客观定量工具.得到的主要结论如下:该6次环流大...  相似文献   

15.
Using daily observational rainfall data covered 194 stations of China from 1961 to 1995 and NCEP model analyzed pentad precipitation data of global grid point from 1979 to 1997,the distribution of onset date of rainy season over Asian area from spring to summer is studied in this paper.The analyzed results show that there exist two stages of rainy season onset over East Asian region from spring to summer rainy season onset accompanying subtropical monsoon and tropical monsoon respectively.The former rain belt is mainly formed by the convergence of cold air and the recurred southwesterly flow from western part of subtropical high and westerly flow from the so-called western trough of subtropical region occurring during winter to spring over South Asia.The latter is formed in the process of subtropical monsoon rain belt over inshore regions of South China Sea originally coming from south of Changjiang (Yangtze) River Basin advancing with northward shift of subtropical high after the onset of tropical monsoon over South China Sea.The pre-flood rainy season over South China region then came into mature period and the second peak of rainfall appeared.Meiyu,the rainy season over Changjiang-Huaihe River Basin and North China then formed consequently.The process of summer tropical monsoon onset over South China Sea in 1998 is also discussed in this paper.It indicated that the monsoon during summer tropical monsoon onset over South China Sea is the result of the westerly flow over middle part of South China Sea,which is from the new generated cyclone formed in north subtropical high entering into South China Sea,converged with the tropical southwesterly flow recurred by the intensified cross-equatorial flow.  相似文献   

16.
南海夏季风爆发的数值预报试验   总被引:1,自引:1,他引:1       下载免费PDF全文
分析了1986年南海夏季风爆发的环流演变特征,由经向风速剖面图看出,南风首先在中南半岛迅速加强,然后向南海发展,南海夏季风爆发同孟加拉湾低压的发展密切相关。通过地形和非绝热单因子敏感性数值预报试验表明,地形作用和凝结潜热等非绝热作用对南海夏季风的爆发都是很重要的,包含有这两种作用在内的控制试验成功地预报出了南海夏季风爆发的中期演变过程,单独的地形作用或非绝热作用都不能预报出南海夏季风的爆发。  相似文献   

17.
ON THE PROCESS OF SUMMER MONSOON ONSET OVER EAST ASIA   总被引:6,自引:0,他引:6  
Using daily observational rainfall data covered 194 stations of China from 1961 to 1995 andNCEP model analyzed pentad precipitation data of global grid point from 1979 to 1997,thedistribution of onset date of rainy season over Asian area from spring to summer is studied in thispaper.The analyzed results show that there exist two stages of rainy season onset over East Asianregion from spring to summer rainy season onset accompanying subtropical monsoon and tropicalmonsoon respectively.The former rain belt is mainly formed by the convergence of cold air and therecurred southwesterly flow from western part of subtropical high and westerly flow from the so-called western trough of subtropical region occurring during winter to spring over South Asia.Thelatter is formed in the process of subtropical monsoon rain belt over inshore regions of South ChinaSea originally coming from south of Changjiang (Yangtze) River Basin advancing with northwardshift of subtropical high after the onset of tropical monsoon over South China Sea.The pre-floodrainy season over South China region then came into mature period and the second peak of rainfallappeared.Meiyu,the rainy season over Changjiang-Huaihe River Basin and North China thenformed consequently.The process of summer tropical monsoon onset over South China Sea in 1998is also discussed in this paper.It indicated that the monsoon during summer tropical monsoononset over South China Sea is the result of the westerly flow over middle part of South China Sea,which is from the new generated cyclone formed in north subtropical high entering into SouthChina Sea,converged with the tropical southwesterly flow recurred by the intensified cross-equatorial flow.  相似文献   

18.
The SCSMEX is a joint atmospheric and oceanic experiment by international efforts, aiming at studying the onset, maintenance, and variability of the South China Sea (SCS) summer monsoon, thus improving the monsoon prediction in Southeast and East Asian regions. The field experiment carried out in May-August 1998 was fully successful, with a large amount of meteorological and oceanographic data acquired that have been used in four dimensional data assimilations by several countries, in order to improve their numerical simulations and prediction. These datasets are also widely used in the follow-up SCS and East Asian monsoon study. The present paper has summarized the main research results obtained by Chinese meteorologists which cover six aspects: (1) onset processes and mechanism of the SCS summer monsoon; (2) development of convection and mesoscale convective systems (MCSs) during the onset phase and their interaction with large-scale circulation; (3) low-frequency oscillation and teleconnection effect; (4) measurements of surface fluxes over the SCS and their relationship with the monsoon activity; (5) oceanic thermodynamic structures, circulation, and mesoscale eddies in the SCS during the summer monsoon and their relationship with ENSO events; and (6) numerical simulations of the SCS and East Asian monsoon.  相似文献   

19.
东亚地区夏季风爆发过程   总被引:72,自引:5,他引:67  
利用中国194站1961~1995年日降水资料及NCEP1979~1997年候格点降水资料,探讨了亚洲地区自春到夏的雨季开始分布。结果表明,东亚地区自春到夏存在副热带季风雨季开始和热带季风雨季开始。前者于4月初开始于华南北部和江南地区,随后向南和向西南扩展,于4月末扩展到华南沿海和中南半岛,这个雨带主要是冷空气和副热带高压西侧转向的SW风以及南亚地区冬春副热带南支西风槽中西风汇合而形成的,是副热带季风雨季开始。后者是南海热带季风爆发后使原来由江南移到华南沿岸的副热带季风雨带随副热带高压北进而北进,前汛期雨季进入盛期,江南出现第二次雨峰,形成梅雨期和江淮及华北雨季。同时,热带季风雨带也自东向西传播到达南亚地区而形成热带季风雨季。还讨论了1998年东亚地区夏季风爆发过程,指出南海夏季风爆发期的季风由副高北侧形成的新生气旋进入南海造成南海中部西风和南海越赤道气流转向的SW季风加强汇合而形成,因而是东亚季风系统中环流系统季节变化造成的,和印度季风无关。在南海季风爆发期阿拉伯海仍由副热带反气旋控制,南亚仍是上述副热带反气旋北侧NW风南下后转向的偏西副热带气流所控制,索马里低空急流仍未爆发,赤道西风并未影响南海。  相似文献   

20.
本文计算、分析了1981年南海夏季风爆发前后华南地区平均的大气动力学和热力学结构,水汽和能量收支情况。分析表明,在季风爆发前后这些物理量场,特别是垂直运动场,都经历了一次明显的变化。南海夏季风的建立,是以副热带高压从南海东撒,越赤道气流北进为特征。它与以“爆发性涡旋”为开始,降水与西南气流同时开始的印度夏季风有所不同。另外,南海夏季风建立过程,主要变化发生在中、上层大气之中。这说明夏季风的建立,主要是大气环流季节性调整的结果,海陆差异需要有合适的大气环流配合才能产生明显的季风。对大气能量收支的分析表明,夏季风爆发前,华南地区主要是动能向总位能转换。所产生的总位能部分辐散到边界之外,部分消耗在对流层上层非绝热冷却过程之中,因而在对流层下部总位能才有稍明显的增长。夏季风爆发后,整个能量循环几乎相反。总位能大量转换为动能,以维持南海夏季风的增长。而整层大气中的非绝热加热以及总位能的辐合又补充了大气中总位能的损耗。潜热释放是夏季风爆发后大气的主要非绝热加热过程,它是南海夏季风维持,发展的主要能源。  相似文献   

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