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Abrupt Transition of Ecosystem over Semiarid Region

Abrupt Transition of Ecosystem over Semiarid Region. Land ecosystem is mainly determined by climate and soil condition. The response of vegetation to climate change can be either smooth or dramatic.

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Abrupt Transition of Ecosystem over Semiarid Region

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  1. Abrupt Transition of Ecosystem over Semiarid Region • Land ecosystem is mainly determined by climate and soil condition. • The response of vegetation to climate change can be either smooth or dramatic. • Previous study shows that abrupt transition of ecosystem (e.g., between grassland and desert) could occur within the land-atmosphere coupled system. • Our result suggests that land system alone (with vegetation interacts with soil water) can also display abrupt transition. • Related topics: • Transformation of desert to grassland • Grazing Current work • (1) Spatial pattern of vegetation distribution • Vegetation pattern can occur along the transition zone when horizontal processes are considered. • How will such spatial pattern influence the abrupt transition? • (2) CLM/DGVM • Why we can not find abrupt transition in CLM/DGVM? • Competition between different spices? • Influences of multiple processes? • Different model parameters? • Lack of some essential mechanisms?

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