• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Remote sensing and modeling of the atmosphere, oceans, and interactions VI >The spatio-temporal structures and role of low- and high-frequency intraseasonal modes in Indian Summer monsoon rainfall observed in TRMM data
【24h】

The spatio-temporal structures and role of low- and high-frequency intraseasonal modes in Indian Summer monsoon rainfall observed in TRMM data

机译：TRMM数据观测到的印度夏季风季风的时空结构及其低频和高频季节内模式的作用

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

This study uses precipitation estimates from the Tropical Rainfall Measuring Mission to estimate the intensity and examine the spatiotemporal patterns in the modes found in intraseasonal timescale over the Indian monsoon region during boreal summer. Here, using multichannel singular spectrum analysis, two dominant modes of oscillations are found in the intraseasonal timescale with periodicity of 10-20-days and 20-60-days, respectively. 20-60-days mode shows northward propagation from the equatorial Indian Ocean linked with the eastward propagating modes of convective systems over the tropics. 10-20-days mode shows very complex structure with a northwestward propagating anomaly pattern emanating from the Indonesian coast moving towards central India. This pattern is found to have a possible interaction with a structure emerging from higher latitudes propagating southeastwards. The two intraseasonal modes contribute comparable amount to the total rainfall variability. The intensity of the 20-60-days (10-20-days) mode show significantly strong inverse (direct) relationship with all-India June-September rainfall and both the modes exhibit profound variability in their intensity in interannual scale. This study also establishes that the probability of getting good amount of rainfall (no rainfall) over central India increases significantly if the two intraseasonal modes exhibit positive (negative) anomalies over the region. Relation between the ISO intensities and sea surface temperature is also discussed. This study points towards the fact that the knowledge of ISO phases can increase the skill in the probabilistic forecasting of rainfall over India.
机译：这项研究利用热带雨量测量团的降水估算来估算强度，并检查北印度夏季风季节内在印度季风地区的季节内时标中发现的模式的时空格局。在这里，使用多通道奇异频谱分析，在季节内时标中发现了两种主要的振荡模式，其周期性分别为10-20天和20-60天。 20-60天模式显示了赤道印度洋向北传播，与热带对流系统的向东传播模式有关。 10到20天的模式显示了非常复杂的结构，从印度尼西亚海岸向印度中部散发出西北传播的异常模式。发现这种模式可能与从向东南传播的更高纬度出现的结构产生可能的相互作用。两种季节内模式对总降雨量变化的贡献相当。 20-60天（10-20天）模式的强度与全印度6月至9月的降雨表现出强烈的反（直接）关系，并且两种模式在年际尺度上都表现出深远的变化性。这项研究还确定，如果两种季节内模式在该地区呈正（负）异常，则在印度中部获得大量降雨（无降雨）的可能性将大大增加。还讨论了ISO强度与海面温度之间的关系。这项研究指出了这样一个事实：ISO阶段的知识可以提高印度降水概率预报的技能。

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