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Nov 8, 2024 | 
nature.com | Chao Yue |Mengyang Xu |Philippe Ciais |Shu Tao |Huizhong Shen |Jinfeng Chang | +6 more
AbstractUnleashing the land sector’s potential for climate mitigation requires purpose-driven changes in land management. However, contributions of past management changes to the current global and regional carbon cycles remain unclear. Here, we use vegetation modelling to reveal how a portfolio of ecological restoration policies has impacted China’s terrestrial carbon balance through developing counterfactual ‘no-policy’ scenarios.
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Oct 30, 2024 | 
nature.com | Chao Yue |Binbin He |Philippe Ciais |Stephen Sitch |Rui Chen |Xingwen Quan | +2 more
AbstractThe Paris Agreement mandates that signatory countries enhance the transparency of their national greenhouse gas inventories. China’s inventories have reported substantial forest carbon gains using ground-based forest plot measurements, but independent satellite-based support for such inventories is lacking and the contributions from human management and anthropogenic environmental changes (atmospheric CO2 growth, climate change and nitrogen deposition) are unknown.
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Oct 23, 2024 | 
nature.com | Shouzhang Peng |César Terrer |Benjamin Smith |Philippe Ciais |Joshua Fisher |Lei Deng
AbstractEcosystem restoration is a critical nature-based solution to mitigate climate change. However, the carbon sequestration potential of restoration, defined as the maximum achievable carbon storage, has likely been overestimated because previous studies have not adequately accounted for the competition between ecosystem water demands for maximizing carbon sequestration and human water needs.
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Oct 16, 2024 | 
onlinelibrary.wiley.com | Elsa Abs |Philippe Ciais |Steven Allison |David Coulette
1 Introduction As primary drivers of Earth's biogeochemical cycles through organic matter decomposition and respiration, soil microbial communities determine how decomposition will affect future soil carbon stock changes, and carbon feedback on global warming through CO2 released by soils (Falkowski, Fenchel, and Delong 2008).
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Oct 15, 2024 | 
agupubs.onlinelibrary.wiley.com | Lei Fan |Guanyu Dong |Philippe Ciais |Xiangming Xiao
1 Introduction Tropical biomes hold the Earth's largest carbon pool (Chen et al., 2017; Pan et al., 2011; Wigneron et al., 2024), especially for tropical forests accounting for approximately half of the global gross primary production (GPP) (Wang et al., 2024). Slight fluctuations of tropical forest growth and mortality could profoundly impact the global carbon balance, and even exacerbate the rise in atmospheric CO2 concentrations (Espirito-Santo et al., 2014).
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Oct 14, 2024 | 
enpc.hal.science | N. Scott |Philippe Ciais |C. Rio |A. Chédin
Article Dans Une Revue Atmospheric Chemistry and Physics Discussions Année : 2009 Regional-scale correlation between CO2 fire emissions, burned areas, and mid-tropospheric CO2 daily variations over southern Africa Origine Fichiers produits par l'(les) auteur(s) hal-04113591 , version 1 (14-10-2024) A. Chédin, N. A. Scott, Philippe Ciais, C. Rio, F. Hourdin, et al..
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Sep 17, 2024 | 
nature.com | Chao Wang |Baojing Gu |Feng Zhou |Deli Chen |Hanqin Tian |Philippe Ciais | +1 more
AbstractMaize and wheat are two major staple foods that collectively contribute two-thirds of the world’s grain supply. The extensive use of nitrogen (N) fertilizers during the cultivation of both crops leads to significant losses of reactive nitrogen (Nr) into the environment. Here, using machine learning algorithms, we generate high-resolution maps of crop-specific soil Nr losses based on global field measurements.
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Sep 13, 2024 | 
nature.com | Xianjin He |Steven Allison |Yuanyuan Huang |Stefano Manzoni |Rose Z. Abramoff |Elisa Bruni | +11 more
AbstractMicrobial carbon use efficiency (CUE) affects the fate and storage of carbon in terrestrial ecosystems, but its global importance remains uncertain. Accurately modeling and predicting CUE on a global scale is challenging due to inconsistencies in measurement techniques and the complex interactions of climatic, edaphic, and biological factors across scales.
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Sep 12, 2024 | 
nature.com | Yu Feng |Philippe Ciais |Jean-Pierre Wigneron |Alan Ziegler |Dave van Wees |Dominick V. Spracklen | +4 more
AbstractTropical terrestrial ecosystems play an important role in modulating the global carbon balance. However, the complex dynamics and factors controlling tropical aboveground live biomass carbon (AGC) are not fully understood. Here, using remotely sensed observations, we find a moderate net AGC sink of 0.21 ± 0.06 PgC yr−1 throughout the global tropics from 2010 to 2020. This arises from a gross loss of −1.79 PgC yr−1 offset by a marked gain of 2.01 ± 0.06 PgC yr−1.
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Sep 12, 2024 | nature.com | Yu Feng |Philippe Ciais |Jean-Pierre Wigneron |Alan Ziegler |Dave van Wees |Dominick V. Spracklen | +4 more
AbstractTropical terrestrial ecosystems play an important role in modulating the global carbon balance. However, the complex dynamics and factors controlling tropical aboveground live biomass carbon (AGC) are not fully understood. Here, using remotely sensed observations, we find a moderate net AGC sink of 0.21 ± 0.06 PgC yr−1 throughout the global tropics from 2010 to 2020. This arises from a gross loss of −1.79 PgC yr−1 offset by a marked gain of 2.01 ± 0.06 PgC yr−1.
