Jolly D, Haxeltine A
Global Systems Group, Department of Ecology, Lund University, Ecology Building, S-223 62 Lund, Sweden.
Science. 1997 May 2;276(5313):786-8. doi: 10.1126/science.276.5313.786.
Estimates of glacial-interglacial climate change in tropical Africa have varied widely. Results from a process-based vegetation model show how montane vegetation in East Africa shifts with changes in both carbon dioxide concentration and climate. For the last glacial maximum, the change in atmospheric carbon dioxide concentration alone could explain the observed replacement of tropical montane forest by a scrub biome. This result implies that estimates of the last glacial maximum tropical cooling based on tree- line shifts must be revised.
对热带非洲冰期-间冰期气候变化的估计差异很大。一个基于过程的植被模型的结果显示了东非山地植被如何随着二氧化碳浓度和气候的变化而变化。对于末次盛冰期，仅大气二氧化碳浓度的变化就可以解释观察到的热带山地森林被灌丛生物群落所取代的现象。这一结果意味着，基于林线变化对末次盛冰期热带降温的估计必须修正。
