违反了 PRIMARY KEY 约束 'PK_t_counter'。不能在对象 'dbo.t_counter' 中插入重复键。 语句已终止。 南亚高压的东西偏向对亚洲季风区对流层顶 附近水汽分布的影响-Impact of the East-west Phase of South Asia High on water vapor distribution near tropopause over the?Asian monsoon region
doi:  10.3878/j.issn.1006-9585.2017.17048
南亚高压的东西偏向对亚洲季风区对流层顶 附近水汽分布的影响

Impact of the East-west Phase of South Asia High on water vapor distribution near tropopause over the?Asian monsoon region
摘要点击 36  全文点击 22  投稿时间:2017-03-21  最后修改时间:2017-08-03
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基金:  国家自然科学基金项目(41405041,41630421),中央高校基本科研业务费专项资金(lzujbky-2017-73)
中文关键词:  南亚高压 东西偏向 水汽 物质输送
英文关键词:  South?Asia?high,?East-West?phase,?Water?vapor,?Mass?transport
                 
作者中文名作者英文名单位
屠厚旺tuhouwang兰州大学大气科学学院/半干旱气候变化教育部重点实验室
田红瑛tianhongying兰州大学大气科学学院/半干旱气候变化教育部重点实验室
梅成红meichenghong兰州大学大气科学学院/半干旱气候变化教育部重点实验室
王文澜wangwenlan兰州大学大气科学学院/半干旱气候变化教育部重点实验室
张如华zhangruhua兰州大学大气科学学院/半干旱气候变化教育部重点实验室
雒佳丽LuoJiali兰州大学大气科学学院/半干旱气候变化教育部重点实验室
引用:屠厚旺,田红瑛,梅成红,王文澜,张如华,雒佳丽.2017.南亚高压的东西偏向对亚洲季风区对流层顶 附近水汽分布的影响[J].气候与环境研究
Citation:tuhouwang,tianhongying,meichenghong,wangwenlan,zhangruhua,LuoJiali.2017.Impact of the East-west Phase of South Asia High on water vapor distribution near tropopause over the?Asian monsoon region[J].Climatic and Environmental Research(in Chinese)
中文摘要:
      基于1958~2002年欧洲中期数值预报中心(ECMWF)提供的ERA-40再分析资料和NCEP/NCAR再分析资料研究了夏季南亚高压的东西偏向与亚洲季风区对流层顶附近水汽输送之间的关系。结果表明:(1)南亚高压的东西偏向对上对流层200 hPa水汽高值中心的位置影响较小,主要影响其强度,对100 hPa水汽高值中心的位置和强度有着较强的影响,而对平流层下部70 hPa的水汽分布几乎没有影响。(2)偏东年,高原上空和高原南部的垂直上升运动较强,在西风急流的共同作用下可将低层丰富的水汽向上输送,使200 hPa和100 hPa的水汽高值中心位于高原上空,而100 hPa南亚高压范围内偏北风和偏东风增强,在水平输送的作用下使高值中心周围水汽的分布形态与高压中心的分布形态一致。(3)偏西年,沿着高原西部的地形抬升作用比高原上空的对流上升运动更强,西风急流北移,对流层顶附近在60°E~80°E范围内形成气旋式环流,因此水汽高值中心向西偏移到伊朗高原。(4)南亚高压范围内200 hPa的温度异常分布与水汽的异常分布一致,暖中心有利于高水汽的生成。而100 hPa的温度异常分布与水汽异常分布相反,暖中心对应异常偏低的水汽,说明南亚高压范围内下平流层的水汽分布受环流场和温度场共同作用的影响。该研究对理解南亚高压东西变化机制及提高亚洲气候预测有一定的参考意义。
Abstract:
      Based?on the ERA-40 reanalysis?data provided by the?European?Centre?for?Medium-Range? Weather Forecasts?(ECMWF)?and?NCEP/NCAR?reanalysis?data from 1958 to 2002, we study?the relationships between the east-west phase of the South?Asia?High (SAH) and the water vapor near the tropopause over Asian?monsoon?region.?The results?show?that?the east-west?phase of the SAH?has correlation with the intensity of high water vapor center at 200 hPa, and has an obvious impact on the intensity and location of high water vapor center at 100 hPa, but almost no effect on the intensity and location of the water vapor at 70 hPa. During the east phase of the SAH, the high value centers of the water vapor at 200 hPa and 100 hPa are located over the Tibetan Plateau (TP) and are related to the strong ascending motion and subtropical westerly jet, which transports water vapor to near tropopause over the TP. At 100 hPa, the horizonal motion induced strong northerly and easterly winds plays an important role in the high water vapor center. During the west phase of the SAH, the high water vapor center shift westward to Iranian Plateau because of the stronger upward movements resulting from the terrain lifting effect along the western TP and the westerly jet moving north. The distribution of temperature anomaly is consistent with that of water vapor, and the warm center is beneficial to the generation of high moisture at 200 hPa in SAH. The?distribution of temperature?anomaly?is?contrary to?that ?of?water?vapor, the warm center corresponds to the low vapor at 100 hPa, indicating that the distribution of water vapor in the stratosphere in SAH is influenced by the interaction of the circulation and the temperature field. The study is good for understanding the mechanism of the east-west phase of the SAH and improving the quality of climate forecast.
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