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
Citations
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Land surface phenology of Northeast China during 2000–2015: temporal changes and relationships with climate changes
TL;DR: The results showed that the NEC experienced great phenological changes in terms of spatial heterogeneity during 2000–2015, and a distinct inter-annual variation in land surface phenology related to climate variables was found, even if some areas presented non-significant trends.
Journal ArticleDOI
Increased drought effects on the phenology of autumn leaf senescence
Chaoyang Wu,Jie Peng,Philippe Ciais,Josep Peñuelas,Huanjiong Wang,Santiago Beguería,T. Andrew Black,Rachhpal S. Jassal,Xiaoyang Zhang,Wenping Yuan,Eryuan Liang,Xiaoyue Wang,Hao Hua,Ronggao Liu,Weiming Hu,Yongshuo H. Fu,Quansheng Ge +16 more
TL;DR: In this paper , an improved set of phenology models based on this influence and project earlier foliar senescence by the end of the century, particularly at high latitudes (>50° N).
Journal ArticleDOI
Vegetation Phenology in the Qilian Mountains and Its Response to Temperature from 1982 to 2014
TL;DR: In this article, the authors explored the spatial and temporal heterogeneity of phenology in the Qilian Mountains from 1982 to 2014 and its response to three temperature indicators, including the mean daily temperature (Tmean), mean daily daytime temperature, and mean daily nighttime temperature.
Journal ArticleDOI
Nonuniform Time-Lag Effects of Asymmetric Warming on Net Primary Productivity across Global Terrestrial Biomes
TL;DR: In this article, the authors quantitatively studied the time-lag effects of asymmetric warming on global plant biomes by using terrestrial vegetation net primary production (NPP) derived by the Carnegie-Ames-Stanford Approach (CASA) model and accumulated daytime and nighttime temperature (ATmax and ATmin) from 1982 to 2013.
Journal ArticleDOI
Discrepancies in vegetation phenology trends and shift patterns in different climatic zones in middle and eastern Eurasia between 1982 and 2015.
TL;DR: The results show that the LOS has significantly increased by 0.27 days/year, mostly due to a significantly advanced SOS and a slightly delayed EOS over the entire study area from 1982 to 2015.
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