...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric research >Resolving the weakening of orographic rainfall over India using a regional climate model RegCM 4.5
【24h】

Resolving the weakening of orographic rainfall over India using a regional climate model RegCM 4.5

机译：使用区域气候模型REGCM 4.5解决印度的地际降雨弱化

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

In this study, the weakening of the orographic rainfall for the period 2000-2011 during the Indian summer monsoon (JJA) is investigated using the regional climate model RegCM 4.5. Analysis reveals that when sulfate aerosol feedback is included in the model run, the simulated temperature shows a cooling of the continental upper troposphere by 0.3 degrees C. At the same time, the sulfate aerosol loading in the atmosphere had induced cooling of 0.2 degrees C of the lower troposphere over the Indian region. Consequently, the simulated zonal wind fields show a weakening at the upper and lower tropospheric levels, particularly where the semi-permanent systems that drive the monsoon circulations are located. It is suggested that the weakening of zonal winds has caused a suppression of the orographic rainfall along the west coast of India (Western Ghats), as evident from the observations. Concurrently, the simulations indicate a sulfate aerosol induced reduction in orographic monsoon rainfall over the southern Western Ghats, whereas their effect is insignificant in controlling the orographic rainfall in the northern Western Ghats. Moreover, our analysis indicates a decline in rainfall over the Himalayan foothills when the sulfate aerosol feedbacks are included, which corroborates well with the observations.
机译：在这项研究中，使用区域气候模型REGCM 4.5研究了印度夏季季风（JJA）期间2000 - 2011年期间的地际降雨削弱了。分析表明，当模型运行中包括硫酸盐气溶胶反馈时，模拟温度显示欧洲上层对流层的冷却0.3摄氏度。同时，大气中的硫酸盐气溶胶载荷诱导冷却0.2℃的冷却印度地区的对流层较低。因此，模拟的区域风电场在上层和下部的对流层水平上显示出弱化，特别是在驱动季隆循环的半永久性系统所在的位置。有人建议，民主风的削弱导致印度西海岸（西驻赫什西港）的抑制，从观察结果中显而易见。同时，模拟表明硫酸盐气溶胶诱导南部止步沼泽地区的肉体季风降雨量，而它们的效果在控制北部止步区的地际降雨方面是微不足道的。此外，我们的分析表明，当包括硫酸盐的气溶胶反馈时，在喜马拉雅山上的降雨量下降，这与观察结果均匀。

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