Influence of the meridional displacement of the North African–West Asian jet on the interannual variation of surface air temperature in June over central India

It has been well documented that the land surface air temperature (SAT) over central India shows its largest interannual variability in June and can cause substantial socioeconomic impacts. This study investigated the circulation anomalies responsible for the interannual variation of June central Indian SAT, particularly those independent of ENSO. The results indicate that the June central Indian SAT can be affected by the Silk Road Pattern and by the meridional displacement of the North African–West Asian jet. This relationship between the circulation and SAT is valid after removing the influences of ENSO, suggesting a crucial role of extratropical circulations. 印度中部地区地表气温在6月表现出最强的年际变化, 进而可能对当地的社会经济产生重要的影响.本研究分析了引起6月印度中部地区气温年际变化的大气环流异常, 特别是与ENSO无关的信号.结果表明, 丝绸之路遥相关型可以通过影响北非–西亚高空急流的经向偏移, 进而影响印度中部地区的地表气温.这一联系在去除ENSO的影响后仍然显著存在, 说明热带外环流可以起到重要的作用.