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国际研究发现臭氧污染影响植物生长与碳吸收能力 快报文章
气候变化快报,2024年第19期
作者:  裴惠娟
Microsoft Word(16Kb)  |  收藏  |  浏览/下载:473/0  |  提交时间:2024/10/05
Tropical Forests  Ground-Level Ozone  Productivity  Carbon  
美研究人员为制定海洋去碳标准提出建议 快报文章
资源环境快报,2023年第11期
作者:  薛明媚,王金平
Microsoft Word(16Kb)  |  收藏  |  浏览/下载:617/0  |  提交时间:2023/06/15
Marine Carbon Dioxide Removal  Ocean Alkalinity Enhancement  Productivity  
学术界对陆地生态系统碳通量的估算尚未达成共识 快报文章
气候变化快报,2022年第08期
作者:  董利苹
Microsoft Word(15Kb)  |  收藏  |  浏览/下载:785/0  |  提交时间:2022/04/20
Global Terrestrial Carbon Cycle  Productivity  Respiration Fluxes  
Ghosts of the past: how drought legacy effects shape forest functioning and carbon cycling 期刊论文
ECOLOGY LETTERS, 2020, 23 (5) : 891-901
作者:  Kannenberg, Steven A.;  Schwalm, Christopher R.;  Anderegg, William R. L.
收藏  |  浏览/下载:23/0  |  提交时间:2020/07/02
Carbon allocation  drought recovery  gross primary productivity  growth lags  
Accelerated discovery of CO2 electrocatalysts using active machine learning 期刊论文
NATURE, 2020, 581 (7807) : 178-+
作者:  Lan, Jun;  Ge, Jiwan;  Yu, Jinfang;  Shan, Sisi;  Zhou, Huan;  Fan, Shilong;  Zhang, Qi;  Shi, Xuanling;  Wang, Qisheng;  Zhang, Linqi;  Wang, Xinquan
收藏  |  浏览/下载:129/0  |  提交时间:2020/07/03

The rapid increase in global energy demand and the need to replace carbon dioxide (CO2)-emitting fossil fuels with renewable sources have driven interest in chemical storage of intermittent solar and wind energy(1,2). Particularly attractive is the electrochemical reduction of CO2 to chemical feedstocks, which uses both CO2 and renewable energy(3-8). Copper has been the predominant electrocatalyst for this reaction when aiming for more valuable multi-carbon products(9-16), and process improvements have been particularly notable when targeting ethylene. However, the energy efficiency and productivity (current density) achieved so far still fall below the values required to produce ethylene at cost-competitive prices. Here we describe Cu-Al electrocatalysts, identified using density functional theory calculations in combination with active machine learning, that efficiently reduce CO2 to ethylene with the highest Faradaic efficiency reported so far. This Faradaic efficiency of over 80 per cent (compared to about 66 per cent for pure Cu) is achieved at a current density of 400 milliamperes per square centimetre (at 1.5 volts versus a reversible hydrogen electrode) and a cathodic-side (half-cell) ethylene power conversion efficiency of 55 +/- 2 per cent at 150 milliamperes per square centimetre. We perform computational studies that suggest that the Cu-Al alloys provide multiple sites and surface orientations with near-optimal CO binding for both efficient and selective CO2 reduction(17). Furthermore, in situ X-ray absorption measurements reveal that Cu and Al enable a favourable Cu coordination environment that enhances C-C dimerization. These findings illustrate the value of computation and machine learning in guiding the experimental exploration of multi-metallic systems that go beyond the limitations of conventional single-metal electrocatalysts.


  
Links Between the Coral delta C-13 Record of Primary Productivity Variations in the Northern South China Sea and the East Asian Winter Monsoon 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Han, Tao;  Yu, Kefu;  Yan, Hongqiang;  Deng, Wenfeng;  Liu, Yi;  Xu, Shendong;  Tao, Shichen;  Zhang, Huiling;  Wang, Shaopeng
收藏  |  浏览/下载:32/0  |  提交时间:2020/02/17
coral  carbon isotope  primary productivity  East Asian Winter Monsoon  South China Sea  
Evidence for large carbon sink and long residence time in semiarid forests based on 15 year flux and inventory records 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Qubaja, Rafat;  Grunzweig, Jose M.;  Rotenberg, Eyal;  Yakir, Dan
收藏  |  浏览/下载:29/0  |  提交时间:2020/02/17
carbon sequestration  carbon sink  carbon turnover time  ecosystem productivity  semiarid  soil carbon  
Increased high-latitude photosynthetic carbon gain offset by respiration carbon loss during an anomalous warm winter to spring transition 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Liu, Zhihua;  Kimball, John S.;  Parazoo, Nicholas C.;  Ballantyne, Ashley P.;  Wang, Wen J.;  Madani, Nima;  Pan, Caleb G.;  Watts, Jennifer D.;  Reichle, Rolf H.;  Sonnentag, Oliver;  Marsh, Philip;  Hurkuck, Miriam;  Helbig, Manuel;  Quinton, William L.;  Zona, Donatella;  Ueyama, Masahito;  Kobayashi, Hideki;  Euskirchen, Eugenie S.
收藏  |  浏览/下载:41/0  |  提交时间:2019/11/27
ABoVE  boreal  carbon cycle  climate change  productivity  respiration  SMAP L4C  soil moisture  tundra  
Seasonal variability of forest sensitivity to heat and drought stresses: A synthesis based on carbon fluxes from North American forest ecosystems 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Xu, Bing;  Arain, M. Altaf;  Black, T. Andrew;  Law, Beverly E.;  Pastorello, Gilberto Z.;  Chu, Housen
收藏  |  浏览/下载:25/0  |  提交时间:2019/11/27
climatic stresses  drought  eddy covariance technique  FLUXNET2015  forest carbon cycle  heat wave  net ecosystem productivity  
Divergent long-term trends and interannual variation in ecosystem resource use efficiencies of a southern boreal old black spruce forest 1999-2017 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (9) : 3056-3069
作者:  Liu, Peng;  Black, T. Andrew;  Jassal, Rachhpal S.;  Zha, Tianshan;  Nesic, Zoran;  Barr, Alan G.;  Helgason, Warren D.;  Jia, Xin;  Tian, Yun;  Stephens, Jilmarie J.;  Ma, Jingyong
收藏  |  浏览/下载:24/0  |  提交时间:2019/11/27
carbon use efficiency  climate change  gross ecosystem productivity  light use efficiency  long-term trends  Old Black Spruce  southern boreal forest  water use efficiency