环境科学
干燥
植被(病理学)
气候学
气候变化
生态系统
大气科学
空间生态学
极端天气
碳循环
生态学
地质学
生物
医学
病理
免疫学
作者
Caroline A. Famiglietti,Anna M. Michalak,Alexandra G. Konings
标识
DOI:10.1088/1748-9326/abfc78
摘要
Abstract Understanding plant responses to hydrological extremes is critical for projections of the future terrestrial carbon uptake, but much more is known about the impacts of drought than of extreme wet conditions. However, the latter may control ecosystem-scale photosynthesis more strongly than the former in certain regions. Here we take a data-driven, location-based approach to evaluate where wet and dry extremes most affect photosynthesis. By comparing the sensitivity of vegetation greenness during extreme wetness to that during extreme dryness over a 34 year record, we find that regions where the impact of wet extremes dominates are nearly as common as regions where drought impacts dominate. We also demonstrate that the responses of wet-sensitive regions are not uniform and are instead controlled by multiple, often interacting, mechanisms. Given predicted increases in the frequency and intensity of extreme hydrological events with climate change, the consequences of extreme wet conditions on local and global carbon cycling will likely be amplified in future decades.
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