• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chinese science bulletin >Interannual variability of Mascarene high and Australian high and their influences on summer rainfall over East Asia
【24h】

Interannual variability of Mascarene high and Australian high and their influences on summer rainfall over East Asia

机译：玛斯卡琳高地和澳大利亚高地的年际变化及其对东亚夏季降水的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Based on the reanalysis data from NCEP/NCAR and other observational data, interannual variability of Mascarene high (MH) and Australian high (AH) from 1970 to 1999 is examined. It is shown that interannual variability of MH is dominated by the Antarctic oscillation (AAO), when the circumpolar low in the high southern latitudes deepens, the intensity of MH will be intensified. On the other hand, AH is correlated by AAO as well as El Nino and South Oscillation (ENSO), the intensity of AH will be intensified when El Nino occurs. Both correlation analysis and case study demonstrate that summer rainfall over East Asia is closely related to MH and AH. When MH intensifies from boreal spring to summer (i.e. from austral autumn to winter), there is more rainfall over regions from the Yangtze River valley to Japan, in contrast, less rainfall is found over southern China and western Pacific to the east of Taiwan, and most of regions in mid-latitudes of East Asia. Compared with MH, the effect of AH on summer rainfall in East Asia is limited to localized regions, there is more rainfall over southern China with the intensification of AH. The results in this study show that AAO is a strong signal on interannual time-scale, which plays an important role in summer rainfall over East Asia. This discovery is of real importance to revealing the physical mechanism of interannual variability of East Asian summer monsoon and prediction of summer precipitation in China.
机译：根据来自NCEP / NCAR的再分析数据和其他观测数据，研究了1970年至1999年间玛斯卡琳高（MH）和澳大利亚高（AH）的年际变化。结果表明，MH的年际变化主要受南极振荡（AAO）的影响，当南极高纬度地区的低极向南加深时，MH的强度将增强。另一方面，AH与AAO以及厄尔尼诺和南方涛动（ENSO）相关，当厄尔尼诺现象发生时，AH的强度会增强。相关分析和案例研究均表明，东亚的夏季降水与MH和AH密切相关。当MH从春季的春季到夏季（夏季，从秋季的南方到冬季）增强时，从长江流域到日本的整个地区的降雨量都增加了，相反，在中国南部和台湾东部的西太平洋地区的降雨量却减少了，以及东亚中纬度的大多数地区。与MH相比，AH对东亚夏季降水的影响仅限于局部地区，随着AH的加剧，华南地区的降水增加。这项研究的结果表明，AAO是年际时间尺度上的强烈信号，在东亚的夏季降雨中起着重要作用。这一发现对于揭示东亚夏季风年际变化的物理机制以及预测中国夏季降水具有重要意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号