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| 1 | Empirical estimates of regional carbon budgets imply reduced global soil heterotrophic respiration显示文摘Resolving regional carbon budgets is critical for informing land-based mitigation policy.For nine regions covering nearly the whole globe,we collected inventory estimates of carbon-stock changes complemented by satellite estimates of biomass changes where inventory data are missing.The net land–atmospheric carbon exchange(NEE)was calculated by taking the sum of the carbon-stock change and lateral carbon fluxes from crop and wood trade,and riverine-carbon export to the ocean.Summing up NEE from all regions,we obtained a global‘bottom-up'NEE for net land anthropogenic CO_(2)uptake of–2.2±0.6 Pg C yr^(-1)consistent with the independent top-down NEE from the global atmospheric carbon budget during 2000–2009.This estimate is so far the most comprehensive global bottom-up carbon budget accounting,which set up an important milestone for global carbon-cycle studies.By decomposing NEE into component fluxes,we found that global soil heterotrophic respiration amounts to a source of CO_(2)of 39 Pg C yr^(-1)with an interquartile of 33–46 Pg C yr^(-1)—a much smaller portion of net primary productivity than previously reported. | Philippe Ciais Yitong Yao Thomas Gasser Alessandro Baccini Yilong Wang Ronny Lauerwald Shushi Peng Ana Bastos Wei Li Peter A.Raymond Josep G.Canadell Glen P.Peters Rob J.Andres Jinfeng Chang Chao Yue A.Johannes Dolman Vanessa Haverd Jens Hartmann Goulven Laruelle Alexandra G.Konings Anthony W.King Yi Liu Sebastiaan Luyssaert Fabienne Maignan Prabir K.Patra Anna Peregon Pierre Regnier Julia Pongratz Benjamin Poulter Anatoly Shvidenko Riccardo Valentini Rong Wang Grégoire Broquet Yi Yin Jakob Zscheischler Bertrand Guenet Daniel SGoll Ashley-P.Ballantyne Hui Yang Chunjing Qiu Dan Zhu | 2021 | National Science Review2021，8，2： | 3 |
| 2 | Applications of network analysis for adaptive management of artificial drainage systems in landscapes vulnerable to sea level rise显示文摘 | Benjamin Poulter Jonathan L. Goodall Patrick N. Halpin | 2008 | Journal of Hydrology2008，，3： | 1 |
| 3 | Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017显示文摘Atmospheric methane(CH_(4))concentrations have shown a puzzling resumption in growth since 2007 following a period of stabilization from 2000 to 2006.Multiple hypotheses have been proposed to explain the temporal variations in CH_(4)growth,and attribute the rise of atmospheric CH_(4)either to increases in emissions from fossil fuel activities,agriculture and natural wetlands,or to a decrease in the atmospheric chemical sink.Here,we use a comprehensive ensemble of CH_(4)source estimates and isotopicδ^(13) C-CH_(4)source signature data to show that the resumption of CH_(4)growth is most likely due to increased anthropogenic emissions.Our emission scenarios that have the fewest biases with respect to isotopic composition suggest that the agriculture,landfill and waste sectors were responsible for 53±13%of the renewed growth over the period 2007-2017 compared to 2000-2006;industrial fossil fuel sources explained an additional 34±24%,and wetland sources contributed the least at 13±9%.The hypothesis that a large increase in emissions from natural wetlands drove the decrease in atmosphericδ^(13)C-CH_(4)values cannot be reconciled with current process-based wetland CH_(4)models.This finding suggests the need for increased wetland measurements to better understand the contemporary and future role of wetlands in the rise of atmospheric methane and climate feedback.Our findings highlight the predominant role of anthropogenic activities in driving the growth of atmospheric CH_(4)concentrations. | 张臻 Benjamin Poulter Sara Knox Ann Stavert Gavin McNicol Etienne Fluet-Chouinard Aryeh Feinberg 赵园红 Philippe Bousquet Josep GCanadell Anita Ganesan Gustaf Hugelius George Hurtt Robert BJackson Prabir KPatra Marielle Saunois Lena Hoglund-Isaksson 黄春林 Abhishek Chatterjee 李新 | 2022 | National Science Review2022，9，5： | 0 |
| 4 | 季节补偿效应导致2015/2016厄尔尼诺期间北半球未发生明显的碳汇降低显示文摘厄尔尼诺事件通常在北半球导致广泛的植被生长下降和碳汇降低.然而,基于遥感观测、全球陆地生态系统模型模拟及大气CO_(2)反演多套数据,本研究表明在2015/2016厄尔尼诺成熟阶段,北半球(主要为热带之外的区域)植被普遍持续增绿,陆地碳汇未见减弱.研究结果发现,春季植被生长增强对随后的夏季和秋季植被生长有明显的补偿效应,这种补偿效应维持了夏季植被增绿,并导致2015年春季、夏季及2016年春季陆地碳汇略有增加,特别是在生长季前期(前一年的11月至当年的3月)水分供应增加的北半球热带之外的区域.两套独立数据集结果表明,相对于厄尔尼诺事件发生前5年均值, 2015年春季和夏季陆地碳汇分别平均增加23.34%和0.63%, 2016年春季平均增加6.82%.同时,相较于1997/1998厄尔尼诺事件,更强的季节补偿效应有效地缓解了2015/2016年厄尔尼诺事件对植被生长的不利影响.本研究进一步明确,生长季前期的供水对后续植被生长的遗留效应能够持续约6个月.该研究结果凸显了季节补偿效应在应对偶发性极端厄尔尼诺事件时对植被生长和陆地碳汇的调节作用. | 石芳忠 吴秀臣 李小雁 Philippe CIAIS 刘鸿雁 岳超 杨雨亭 张树磊 彭书时 印轶 Benjamin POULTER 陈德亮 | 2024 | 中国科学:地球科学2024，54，1： | 0 |
| 5 | Seasonal compensation implied no weakening of the land carbon sink in the Northern Hemisphere under the 2015/2016 El Niño显示文摘The recurrent extreme El Niño events are commonly linked to reduced vegetation growth and the land carbon sink over many but discrete regions of the Northern Hemisphere(NH).However,we reported here a pervasive and continuous vegetation greening and no weakened land carbon sink in the maturation phase of the 2015/2016 El Niño event over the NH(mainly in the extra-tropics),based on multiple evidences from remote sensing observations,global ecosystem model simulations and atmospheric CO_(2)inversions.We discovered a significant compensation effect of the enhanced vegetation growth in spring on subsequent summer/autumn vegetation growth that sustained vegetation greening and led to a slight increase in the land carbon sink over the spring and summer of 2015(average increases of 23.34%and 0.63%in net ecosystem exchange from two independent datasets relative to a 5-years average before the El Niño event,respectively)and spring of 2016(6.82%),especially in the extra-tropics of the NH,where the water supply during the pre-growing-season(November of the previous year to March of the current year)had a positive anomaly.This seasonal compensation effect was much stronger than that in 1997 and 1998 and significantly alleviated the adverse impacts of the 2015/2016 El Niño event on vegetation growth during its maturation phase.The legacy effect of water supply during the pre-growing-season on subsequent vegetation growth lasted up to approximately six months.Our findings highlight the role of seasonal compensation effects on mediating the land carbon sink in response to episodic extreme El Niño events. | Fangzhong SHI Xiuchen WU Xiaoyan LI Philippe CIAIS Hongyan LIU Chao YUE Yuting YANG Shulei ZHANG Shushi PENG Yi YIN Benjamin POULTER Deliang CHEN | 2024 | Science China Earth Sciences2024，67，1： | 0 |
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