Daytime and nighttime warming has no opposite effects on vegetation phenology and productivity in the northern hemisphere

Xufeng Wang1, Gaofeng Zhu2, Jingfeng Xiao3, Kun Zhang4, Honglin He5, Yunquan Wang6, Weide Li7 and Huiling Chen2, (1)Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China, (2)Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou, China, (3)University of New Hampshire, Durham, United States, (4)Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, (5)Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Ecosystem Network Observation and Modeling, Beijing, China, (6)School of Environmental Studies, China University of Geosciences, Wuhan, China, (7)School of Mathematics and Statistics, Lanzhou University, Lanzhou, China