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
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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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Rapidly changing high-latitude seasonality: implications for the 21st century carbon cycle in Alaska
TL;DR: In this article , the authors used ecosys, a well-tested and process-rich mechanistic ecosystem model, to explore how climate warming under an RCP8.5 scenario will shift C cycle seasonality in Alaska throughout the 21st century.
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Assessment of Climatic Impact on Vegetation Spring Phenology in Northern China
TL;DR: Wang et al. as mentioned in this paper explored the long-term variation of the start of season (SOS) in northern China by using the updated normalized difference vegetation index and monthly climatic data during 1982-2014.
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Combined Effects of Precipitation and Temperature on the Responses of Forest Spring Phenology to Winter Snow Cover Dynamics in Northeast China
TL;DR: The developed plant phenology index (PPI) derived from Moderate Resolution Image Spectroradiometer (MODIS) was applied to estimate SOS over Northeast China from 2004 to 2018 and indicated that winter snow cover dynamics had a significant effect on the forest spring growth in the following year.
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The response of net primary productivity to climate change and its impact on hydrology in a water-limited agricultural basin.
TL;DR: In this paper, the authors investigated the response of vegetation dynamics to climate change and its impact on hydrologic factors in a traditional agricultural basin with limited water resources in China, Nansi Lake Basin (NLB).
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Assessing the Effects of Surface Conditions on Potential Evapotranspiration in a Humid Subtropical Region of China
Hailong Wang,Jinghua Zheng +1 more
TL;DR: Wang et al. as mentioned in this paper analyzed the effects of surface conditions including vegetation cover indicated by NDVI (Normalized Difference Vegetation Index) and root-zone SWC (soil water content) in a humid subtropical province of China.
References
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