Taklimakan desert carbon-sink decreases under climate change  

随气候变化塔克拉玛干沙漠碳汇能力逐渐衰弱

作　　者：Fan Yang Jianping Huang Chenglong Zhou Xinghua Yang Mamtimin Ali Chaofan Li Honglin Pan Wen Huo Haipeng Yu Xiaoyue Liu Xinqian Zheng Donglia ng Han Qing He Lu Meng Jun Chang 杨帆;黄建平;周成龙;杨兴华;买买提艾力 买买提依明;李超凡;潘红林;霍文;于海鹏;刘晓岳;郑新倩;韩东亮;何清;孟露;常俊(College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;Taklimakan Desert Meteorology Field Experiment Station of CMA,Institute of Desert Meteorology,China Meteorological Administration(CMA),Urumqi 830002,China;Collaborative Innovation Center for Western Ecological Safety,Lanzhou University,Lanzhou 730000,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster,School of Geographic Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China;Xinjiang Agro-Meteorological Observatory,Urumqi 830002,China;Xinjiang Meteorological Bureau,Urumqi 830002,China)

机构地区：[1]College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China [2]Taklimakan Desert Meteorology Field Experiment Station of CMA,Institute of Desert Meteorology,China Meteorological Administration(CMA),Urumqi 830002,China [3]Collaborative Innovation Center for Western Ecological Safety,Lanzhou University,Lanzhou 730000,China [4]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster,School of Geographic Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China [5]Xinjiang Agro-Meteorological Observatory,Urumqi 830002,China [6]Xinjiang Meteorological Bureau,Urumqi 830002,China

出　　处：《Science Bulletin》2020年第6期431-433,M0003,共4页科学通报（英文版）

基　　金：the Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0602);the National Natural Science Foundation of China(41521004,41975010 and 41175140);the China University Research Talents Recruitment Program(B13045).

摘　　要：The global carbon balance is a core issue in climate change research and a focus of in ternational policy concern[1-3].The"missing carbon sink"caused by approximately 1.6-2.0 Pg Ca-1(1 Pg=1015 g)that is currently unaccounted for,has long plagued researchers[4,5].Evidence is mounting those seemingly lifeless desert ecosystems,whose roles in the global carbon-cycle have long been neglected,exhib让the unconventional phenomenon of absorption of atmospheric CO2,sequestering enonnous amounts of CO2 and thereby creating a significant carbon-sink[6-9].全球碳循环中被长期忽视的沙漠生态系统,可能会封存大量CO2发挥碳汇作用.塔克拉玛干沙漠是世界第二大流动沙漠,其碳汇作用的内部过程以及气候变化下碳汇的长期趋势仍不明确.研究发现,流沙的热量波动引起含CO2的土壤空气的膨胀/收缩和盐碱的化学作用共同控制了塔克拉玛干沙漠流沙CO2交换作用.这些过程的相互作用使得该沙漠流沙表现出明显的碳汇作用(速率为1.60×106 t a-1).如果以塔克拉玛干沙漠流沙的CO2吸收量为平均状态,那么全球流动沙漠每年可吸收CO2约2.125×108 t.但是,随气候变化,流沙温差的增大会刺激流沙中空气膨胀,向大气中注入更多的CO2,导致未来流沙碳汇能力逐渐减少.该发现对于评估全球碳循环、缩小碳失汇差额和重新认识沙漠生态系统在碳循环中的地位具有重要作用.

关 键 词：NEGLECTED thereby MOUNT 

分 类 号：X171.1[环境科学与工程—环境科学]