基金This work was supported by the National Key R＆D Program of China （No. 2016YFC0202700）, the National Natural Science Foundation of China （Nos. 41375126, 21527814, 91743202）, and the H2020 Marie Sklodowska-Curie Actions （No. H2020-MSCA-RISE-2015-690958）.
基金The field measurements in the present study were funded by the Taishan Scholar Grand （No. ts20120552） and the National Natural Science Foundation of China （No. 41375126）. The data analyses and modeling studies are supported by the National Natural Science Foundation of China （No. 41675118）, the Qilu Youth Talent Programme of Shandong University, and the Jiangsu Collaborative Innovation Center for Climate Change.