Leaf onset in the northern hemisphere triggered by daytime temperature
Shilong Piao,Jianguang Tan,Anping Chen,Yongshuo H. Fu,Philippe Ciais,Qiang Liu,Ivan A. Janssens,Sara Vicca,Zhenzhong Zeng,Su-Jong Jeong,Yue Li,Ranga B. Myneni,Shushi Peng,Miaogen Shen,Josep Peñuelas +14 more
TLDR
This work shows that the interannual anomalies of LUD during 1982–2011 are triggered by daytime (Tmax) more than by nighttime temperature (Tmin), and suggests a new conceptual framework of leaf onset using daytime temperature to improve the performance of phenology modules in current Earth system models.Abstract:
Recent warming significantly advanced leaf onset in the northern hemisphere. This signal cannot be accurately reproduced by current models parameterized by daily mean temperature (Tmean). Here using in situ observations of leaf unfolding dates (LUDs) in Europe and the United States, we show that the interannual anomalies of LUD during 1982–2011 are triggered by daytime (Tmax) more than by nighttime temperature (Tmin). Furthermore, an increase of 1 Ci nTmax would advance LUD by 4.7 days in Europe and 4.3 days in the United States, more than the conventional temperature sensitivity estimated from Tmean. The triggering role of Tmax, rather than the Tmin or Tmean variable, is also supported by analysis of the large-scale patterns of satellite-derived vegetation green-up in spring in the northern hemisphere (430N). Our results suggest a new conceptual framework of leaf onset using daytime temperature to improve the performance of phenology modules in current Earth systemread more
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Modeling plant phenology by MODIS derived photochemical reflectance index (PRI)
Yang Liu,Chaoyang Wu,Feng Tian,Xiaoyue Wang,John A. Gamon,Christopher Y. S. Wong,Xiao-ying Zhang,Alemu Gonsamo,Rachhpal S. Jassal +8 more
TL;DR: In this article , satellite-based indicators of leaf pigments derived from MODIS ocean bands could be useful for phenology modeling, and the potential of different forms of scaled photochemical reflectance index (sPRIref) in monitoring photosynthetic activity, and found that band 10 and band 13 were more suitable for tracking gross primary productivity (GPP) than other reference bands.
Journal ArticleDOI
Climate warming enhances precipitation sensitivity of flowering phenology in temperate steppes on the Mongolian Plateau
Zhenxing Zhou,Xiaojing Yue,Heng Li,Jiajia Zhang,Junqin Liang,Xueting Yuan,Jingyi Ru,Jian-Rong Song,Ying Li,Meng Zheng,Dafeng Hui,Shiqiang Wan +11 more
TL;DR: In this article , a four-year field experiment with warming and increased/decreased precipitation was conducted to investigate the impacts of climate change on precipitation sensitivity in three dominant temperate grasslands (i.e., desert, typical, and meadow steppes) on the Mongolian Plateau of Northern China.
Journal ArticleDOI
Climate-driven land surface phenology advance is overestimated due to ignoring land cover changes
Yuhao Pan,Dailiang Peng,Jing M. Chen,Ranga B. Myneni,Xiaoyang Zhang,Alfredo Huete,Yongshuo H. Fu,Shi mao Zheng,Kai Yang,Le Yu,Peng Zhu,Miaogen Shen,Weiming Hu,Wenquan Zhu,Qiaoyun Xie,Wen-Shun Huang,Zhengchao Chen,Jingfeng Huang,Chaoyang Wu +18 more
TL;DR: In this article , the authors analyzed how satellite-derived spring green-up dates (GUDs) were impacted by changes in temperature, precipitation, standardized precipitation evapotranspiration index (SPEI), solar radiation, and land cover change (LCC), including interchanges between vegetation and non-vegetation, and among plants with different functional traits.
Journal ArticleDOI
Inter-seasonal Non-uniform Time-lag Responses of Terrestrial Vegetation to Asymmetric Warming: Auto-blocking and Parallel Processing Mechanism (ABPP)
You-yue Wen,Jian Yang,Kui Ling +2 more
TL;DR: In this paper, an auto-blocking and parallel processing mechanism (ABPP) was raised to deal with long-term, high spatio-temporal resolution materials at macro scale.
Journal ArticleDOI
Spatially Varying in CO <sub>2</sub> Concentrations Regulates Carbon Uptake in the Northern Hemisphere
TL;DR: In this paper , the authors used an Earth System Model (ESM) to estimate the carbon uptake in the mid-high latitudes from 2031 to 2060 under the SSP5-8.5 future emissions scenario and found that non-uniform CO2 led to a reduction in net ecosystem productivity (NEP) by −0.1 Pg C yr−1.
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