当前位置: X-MOL 学术Atmos. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Influence of subtropical circulation systems on the changing El Niño-Indian summer monsoon relationship
Atmospheric Research ( IF 5.5 ) Pub Date : 2021-01-09 , DOI: 10.1016/j.atmosres.2021.105457
Shinu Sheela Wilson , K. Mohanakumar

Remote factors have a significant influence on the variability of Indian summer monsoon rainfall. The study investigates atmospheric conditions influenced by the El Niño episodes on the variable summer monsoon over India. Four composites of years were selected based on the occurrence / non-occurrence of El Niño and extreme monsoons over India. This study examines the upper tropospheric and lower tropospheric wind patterns, tropospheric temperature, and velocity potential for 1958 to 2019 using Japanese Reanalysis 55 (JRA 55) data. The regional meridional circulation established by the north-south pressure gradient is more susceptible to the monsoon condition over the Indian Subcontinent than the external factors. The spatial variability and intensity of Australian High in the southern hemisphere play a prominent role in the Indian summer monsoon characteristics. Subtropical circulations in both hemispheres influence monsoon conditions over India irrespective of El Niño condition. The tropical zonal circulation has appeared to be modulated by the El Niño Southern Oscillation (ENSO) condition over the tropical Pacific Ocean, thereby modify the monsoon circulation.



中文翻译:

亚热带环流系统对厄尔尼诺-印度夏季风关系变化的影响

偏远因素对印度夏季季风降水的变化有重大影响。这项研究调查了印度夏季多变季风的厄尔尼诺现象影响的大气条件。根据厄尔尼诺现象的发生与否以及印度上空的极端季风来选择四个年份。本研究使用日本再分析55(JRA 55)数据研究了1958年至2019年对流层上层和对流层下层的风型,对流层温度和速度潜力。由南北压力梯度建立的区域子午环流比外部因素更容易受到印度次大陆上的季风条件的影响。南半球澳大利亚高空的空间变异性和强度在印度夏季风特征中起着重要作用。不论厄尔尼诺现象如何,两个半球的亚热带环流都会影响印度的季风条件。热带纬向环流似乎受热带太平洋上的厄尔尼诺南方涛动(ENSO)条件调节,从而改变了季风环流。

更新日期:2021-01-14
down
wechat
bug