| Title | Exposures to temperature beyond threshold disproportionately reduce vegetation growth in the northern hemisphere |
| Authors | Wu, Xiuchen Guo, Weichao Liu, Hongyan Li, Xiaoyan Peng, Changhui Allen, Craig D. Zhang, Cicheng Wang, Pei Pei, Tingting Ma, Yujun Tian, Yuhong Song, Zhaoliang Zhu, Wenquan Wang, Yang Li, Zongshan Chen, Deliang |
| Affiliation | Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China Univ Quebec, Inst Environm Sci, Montreal, PQ G1K 9H7, Canada US Geol Survey, Ft Collins Sci Ctr, Jemez Mountains Field Stn, Los Alamos, NM 87544 USA Tianjin Univ, Inst Surface Earth Syst Sci Res, Tianjin 300072, Peoples R China Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China Univ Gothenburg, Dept Earth Sci, Reg Climate Grp, S-460 Gothenburg, Sweden |
| Keywords | temperature exposure vegetation growth extremely high temperature non-linear response temperate and boreal northern hemisphere |
| Issue Date | 2019 |
| Publisher | NATIONAL SCIENCE REVIEW |
| Abstract | In recent decades, terrestrial vegetation in the northern hemisphere (NH) has been exposed to warming and more extremely high temperatures. However, the consequences of these changes for terrestrial vegetation growth remain poorly quantified and understood. By examining a satellite-based vegetation index, tree-ring measurements and land-surface model simulations, we discovered a consistent convex pattern in the responses of vegetation growth to temperature exposure (TE) for forest, shrub and grass in both the temperate (30 degrees-50 degrees N) and boreal (50 degrees-70 degrees N) NH during the period of 1982-2012. The response of vegetation growth to TE for the three vegetation types in both the temperate and boreal NH increased convergently with increasing temperature, until vegetation type-dependent temperature thresholds were reached. A TE beyond these temperature thresholds resulted in disproportionately weak positive or even strong negative responses. Vegetation growth in the boreal NH was more vulnerable to extremely high-temperature events than vegetation growth in the temporal NH. The non-linear responses discovered here provide new insights into the dynamics of northern terrestrial ecosystems in a warmer world. |
| URI | http://hdl.handle.net/20.500.11897/553691 |
| ISSN | 2095-5138 |
| DOI | 10.1093/nsr/nwy158 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 城市与环境学院 |
