Relationship between the October–December rainfall in Tanzania and the Walker circulation cell over the Indian Ocean
作者: Paul Tilwebwa Shelleph LimbuGuirong Tan
刊名: Meteorologische Zeitschrift, 2019, Vol.28 (6), pp.453-469
来源数据库: Schweizerbart Journal
DOI: 10.1127/metz/2019/0939
关键词: Walker circulation cellRainfallIndian Ocean DipoleEl Niño–Southern OscillationVariabilityTanzania
英文摘要: Like most of the countries in the Great Horn of Africa, Tanzania is prone to floods and droughts. Anomalously wet years over the region are associated with low-level convergence, the advection of moisture from both the Indian Ocean and the Congo and an ascending limb of the Walker circulation cell centered over the western Indian Ocean (WIO). During positive Indian Ocean dipole (IOD) events, the Walker circulation cell over the Indian Ocean is well defined, and more so compared with observed during El Niño years. In El Niño years, the Walker circulation cell becomes weak compared with positive IOD events, where the zonal winds strengthen, resulting in active convective activities over the WIO. A key finding is that the Walker circulation cell developing over the Indian Ocean is strongly...
全文获取路径: Schweizerbart  (合作)

  • December 十二月
  • October 十月
  • circulation 循环
  • rainfall 降雨量
  • Indian 印弟安星座
  • over 在上方
  • between 在中间