Wang Xufeng, Xiao Jingfeng, Li Xin, Cheng Guodong, Ma Mingguo, Zhu Gaofeng, Altaf Arain M, Andrew Black T, Jassal Rachhpal S
Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China.
Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, 03824, USA.
Nat Commun. 2019 Jun 3;10(1):2389. doi: 10.1038/s41467-019-10235-8.
Phenology plays a fundamental role in regulating photosynthesis, evapotranspiration, and surface energy fluxes and is sensitive to climate change. The global mean surface air temperature data indicate a global warming hiatus between 1998 and 2012, while its impacts on global phenology remains unclear. Here we use long-term satellite and FLUXNET records to examine phenology trends in the northern hemisphere before and during the warming hiatus. Our results based on the satellite record show that the phenology change rate slowed down during the warming hiatus. The analysis of the long-term FLUXNET measurements, mainly within the warming hiatus, shows that there were no widespread advancing (or delaying) trends in spring (or autumn) phenology. The lack of widespread phenology trends partly led to the lack of widespread trends in spring and autumn carbon fluxes. Our findings have significant implications for understanding the responses of phenology to climate change and the climate-carbon feedbacks.
物候学在调节光合作用、蒸散作用和地表能量通量方面起着基础性作用，并且对气候变化很敏感。全球平均地表气温数据显示，1998年至2012年期间出现了全球变暖停滞现象，但其对全球物候学的影响仍不清楚。在此，我们利用长期卫星和通量网记录来研究北半球在变暖停滞之前及期间的物候趋势。我们基于卫星记录的结果表明，在变暖停滞期间物候变化速率放缓。对长期通量网测量数据（主要是在变暖停滞期间）的分析表明，春季（或秋季）物候没有普遍提前（或推迟）的趋势。物候缺乏普遍趋势在一定程度上导致了春季和秋季碳通量缺乏普遍趋势。我们的研究结果对于理解物候对气候变化的响应以及气候-碳反馈具有重要意义。
