Scholarlink

<p>Climate extremes like floods and droughts can damage agricultural production, ecology, and overall economy. The pluvial and drought conditions in Central-East Africa impose serious influence on agriculture, ecology, and human habitation. Strong indication of precipitation variability in both long rains (March to May, MAM) and short rains (October to December, OND), and shifting of precipitation regimes motivate to unveil the controlling strength and prevalence of climate drivers for 1981–2020 throughout all seasons. The correlation between both MAM and OND precipitation and the convective available potential energy (CAPE) is widely positive over Central-East Africa, with 0.215 and 0.284 values, respectively. Both MAM and OND precipitation largely develop a contrasting relationship with surface latent heat flux (LHF) and surface sensible heat flux (SHF), with the correlation values of -0.226 and − 0.255, and 0.3803 and 0.406, respectively. The strongest dependency of Standardized Precipitation Index in MAM and OND is developed with SHF and 2&#xa0;m dewpoint temperature (DPT), with mean and maximum values of 20.972 and 76.126, and 28.11 and 83.955, respectively. Surface heat fluxes, dewpoint temperature, and tropospheric temperature are largely associated with precipitation over the coastal regions, while the strength of convective instability in controlling the wet and dry events is strongly linked to the amount of moisture flux convergence, led by the warmer tropical Pacific and Indian Oceans, especially during boreal winter and short rains. Dry events in the African water tower are mainly associated with anomalously dry westerly and northeasterly. While the occurrence of wet and dry events profoundly varies over basin and high altitudes in the African water tower. Central-East Africa experiences the most prevalent wet event (widespread flooding) in boreal winter (January and February, JF), encompassing both the hemispheres, while precipitation in boreal summer (June to September, JJAS) exhibits some striking changes in Ethiopia. An integration of possible climatic drivers elaborates on the underlying links between distant and local forcings in occurring wet and dry events. Extensive afforestation and inland conservation of water resources through large waterbodies can reduce the adversities of both floods and droughts over Central-East Africa.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermodynamics and the tropical Indo-Pacific sea surface temperature variability dominantly control precipitation variability in Central-East Africa

  • 期刊论文

  • 发表日期：

    2026年3月19日

查看全文
  • Jit Biswas

摘要

Climate extremes like floods and droughts can damage agricultural production, ecology, and overall economy. The pluvial and drought conditions in Central-East Africa impose serious influence on agriculture, ecology, and human habitation. Strong indication of precipitation variability in both long rains (March to May, MAM) and short rains (October to December, OND), and shifting of precipitation regimes motivate to unveil the controlling strength and prevalence of climate drivers for 1981–2020 throughout all seasons. The correlation between both MAM and OND precipitation and the convective available potential energy (CAPE) is widely positive over Central-East Africa, with 0.215 and 0.284 values, respectively. Both MAM and OND precipitation largely develop a contrasting relationship with surface latent heat flux (LHF) and surface sensible heat flux (SHF), with the correlation values of -0.226 and − 0.255, and 0.3803 and 0.406, respectively. The strongest dependency of Standardized Precipitation Index in MAM and OND is developed with SHF and 2 m dewpoint temperature (DPT), with mean and maximum values of 20.972 and 76.126, and 28.11 and 83.955, respectively. Surface heat fluxes, dewpoint temperature, and tropospheric temperature are largely associated with precipitation over the coastal regions, while the strength of convective instability in controlling the wet and dry events is strongly linked to the amount of moisture flux convergence, led by the warmer tropical Pacific and Indian Oceans, especially during boreal winter and short rains. Dry events in the African water tower are mainly associated with anomalously dry westerly and northeasterly. While the occurrence of wet and dry events profoundly varies over basin and high altitudes in the African water tower. Central-East Africa experiences the most prevalent wet event (widespread flooding) in boreal winter (January and February, JF), encompassing both the hemispheres, while precipitation in boreal summer (June to September, JJAS) exhibits some striking changes in Ethiopia. An integration of possible climatic drivers elaborates on the underlying links between distant and local forcings in occurring wet and dry events. Extensive afforestation and inland conservation of water resources through large waterbodies can reduce the adversities of both floods and droughts over Central-East Africa.