| Title | Emerging negative impact of warming on summer carbon uptake in northern ecosystems |
| Authors | Wang, Tao Liu, Dan Piao, Shilong Wang, Yilong Wang, Xiaoyi Guo, Hui Lian, Xu Burkhart, John F. Ciais, Philippe Huang, Mengtian Janssens, Ivan Li, Yue Liu, Yongwen Penuelas, Josep Peng, Shushi Yang, Hui Yao, Yitong Yin, Yi Zhao, Yutong |
| Affiliation | Chinese Acad Sci, Ctr Excellence Tibetan Earth Sci, Beijing 100085, Peoples R China. Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100085, Peoples R China. Peking Univ, Coll Urban & Environm Sci, Sino French Inst Earth Syst Sci, Beijing 100871, Peoples R China. LSCE, F-91191 Gif Sur Yvette, France. Univ Oslo, Dept Geosci, N-0371 Oslo, Norway. Univ Antwerp, Dept Biol, Univ Pl 1, B-2610 Antwerp, Belgium. CREAF, Barcelona 08193, Catalonia, Spain. UAB, CSIC, CEAB, Global Ecol Unit,CREAF, Barcelona 08193, Catalonia, Spain. Chinese Acad Sci, Ctr Excellence Tibetan Earth Sci, Beijing 100085, Peoples R China. Wang, T (reprint author), Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100085, Peoples R China. |
| Keywords | ARCTIC TUNDRA CO2 EXCHANGE ATMOSPHERIC CO2 SEASONAL CYCLE CLIMATE-CHANGE SOIL SATELLITE DIOXIDE SENSITIVITY INCREASES |
| Issue Date | 2018 |
| Publisher | NATURE COMMUNICATIONS |
| Citation | NATURE COMMUNICATIONS. 2018, 9. |
| Abstract | Most studies of the northern hemisphere carbon cycle based on atmospheric CO2 concentration have focused on spring and autumn, but the climate change impact on summer carbon cycle remains unclear. Here we used atmospheric CO2 record from Point Barrow (Alaska) to show that summer CO2 drawdown between July and August, a proxy of summer carbon uptake, is significantly negatively correlated with terrestrial temperature north of 50 degrees N interannually during 1979-2012. However, a refined analysis at the decadal scale reveals strong differences between the earlier (1979-1995) and later (1996-2012) periods, with the significant negative correlation only in the later period. This emerging negative temperature response is due to the disappearance of the positive temperature response of summer vegetation activities that prevailed in the earlier period. Our finding, together with the reported weakening temperature control on spring carbon uptake, suggests a diminished positive effect of warming on high-latitude carbon uptake. |
| URI | http://hdl.handle.net/20.500.11897/571232 |
| ISSN | 2041-1723 |
| DOI | 10.1038/s41467-018-07813-7 |
| Indexed | SCI(E) Medline |
| Appears in Collections: | 城市与环境学院 |
