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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Invasion and drought alter phenological sensitivity and synergistically lower ecosystem production
TL;DR: Results from a four-year drought experiment show that invasion reduced ecosystem potential for carbon gain via increased sensitivity to reduced rainfall, and suggest that predicting ecosystem responses to future climate change could be improved by projecting of the spread of invasive species and accounting for phenological variation between native and invading species.
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First-principle investigation of TcSe2 monolayer as an efficient visible light photocatalyst for water splitting hydrogen production
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TL;DR: In this paper, the authors systematically studied the dynamical stability, optical properties, energy evolution of adsorption, and decomposition of water molecules as well as the hydrogen production process of TcSe2 monolayer based on density functional theory.
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Spatiotemporal Variability of Asymmetric Daytime and Night-Time Warming and Its Effects on Vegetation in the Yellow River Basin from 1982 to 2015.
TL;DR: This study demonstrates a methodogy for studying regional responses of vegetation to climate extremes under global climate change.
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Response of Vegetation Phenology to the Interaction of Temperature and Precipitation Changes in Qilian Mountains
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Impact of leaf area index from various sources on estimating gross primary production in temperate forests using the JULES land surface model
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References
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