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Asynchronous carbon sink saturation in African and Amazonian tropical forests 期刊论文
NATURE, 2020, 579 (7797) : 80-+
作者:  Wannes Hubau;  Simon L. Lewis;  Oliver L. Phillips;  Kofi Affum-Baffoe;  Hans Beeckman;  Aida Cuní;  -Sanchez;  Armandu K. Daniels;  Corneille E. N. Ewango;  Sophie Fauset;  Jacques M. Mukinzi;  Douglas Sheil;  Bonaventure Sonké;  Martin J. P. Sullivan;  Terry C. H. Sunderland;  Hermann Taedoumg;  Sean C. Thomas;  Lee J. T. White;  Katharine A. Abernethy;  Stephen Adu-Bredu;  Christian A. Amani;  Timothy R. Baker;  Lindsay F. Banin;  Fidè;  le Baya;  Serge K. Begne;  Amy C. Bennett;  Fabrice Benedet;  Robert Bitariho;  Yannick E. Bocko;  Pascal Boeckx;  Patrick Boundja;  Roel J. W. Brienen;  Terry Brncic;  Eric Chezeaux;  George B. Chuyong;  Connie J. Clark;  Murray Collins;  James A. Comiskey;  David A. Coomes;  Greta C. Dargie;  Thales de Haulleville;  Marie Noel Djuikouo Kamdem;  Jean-Louis Doucet;  Adriane Esquivel-Muelbert;  Ted R. Feldpausch;  Alusine Fofanah;  Ernest G. Foli;  Martin Gilpin;  Emanuel Gloor;  Christelle Gonmadje;  Sylvie Gourlet-Fleury;  Jefferson S. Hall;  Alan C. Hamilton;  David J. Harris;  Terese B. Hart;  Mireille B. N. Hockemba;  Annette Hladik;  Suspense A. Ifo;  Kathryn J. Jeffery;  Tommaso Jucker;  Emmanuel Kasongo Yakusu;  Elizabeth Kearsley;  David Kenfack;  Alexander Koch;  Miguel E. Leal;  Aurora Levesley;  Jeremy A. Lindsell;  Janvier Lisingo;  Gabriela Lopez-Gonzalez;  Jon C. Lovett;  Jean-Remy Makana;  Yadvinder Malhi;  Andrew R. Marshall;  Jim Martin;  Emanuel H. Martin;  Faustin M. Mbayu;  Vincent P. Medjibe;  Vianet Mihindou;  Edward T. A. Mitchard;  Sam Moore;  Pantaleo K. T. Munishi;  Natacha Nssi Bengone;  Lucas Ojo;  Fidè;  le Evouna Ondo;  Kelvin S.-H. Peh;  Georgia C. Pickavance;  Axel Dalberg Poulsen;  John R. Poulsen;  Lan Qie;  Jan Reitsma;  Francesco Rovero;  Michael D. Swaine;  Joey Talbot;  James Taplin;  David M. Taylor;  Duncan W. Thomas;  Benjamin Toirambe;  John Tshibamba Mukendi;  Darlington Tuagben;  Peter M. Umunay;  Geertje M. F. van der Heijden;  Hans Verbeeck;  Jason Vleminckx;  Simon Willcock;  Hannsjö;  rg Wö;  ll;  John T. Woods;  Lise Zemagho
收藏  |  浏览/下载:27/0  |  提交时间:2020/05/13

Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions(1-3). Climate-driven vegetation models typically predict that this tropical forest '  carbon sink'  will continue for decades(4,5). Here we assess trends in the carbon sink using 244 structurally intact African tropical forests spanning 11 countries, compare them with 321 published plots from Amazonia and investigate the underlying drivers of the trends. The carbon sink in live aboveground biomass in intact African tropical forests has been stable for the three decades to 2015, at 0.66 tonnes of carbon per hectare per year (95 per cent confidence interval 0.53-0.79), in contrast to the long-term decline in Amazonian forests(6). Therefore the carbon sink responses of Earth'  s two largest expanses of tropical forest have diverged. The difference is largely driven by carbon losses from tree mortality, with no detectable multi-decadal trend in Africa and a long-term increase in Amazonia. Both continents show increasing tree growth, consistent with the expected net effect of rising atmospheric carbon dioxide and air temperature(7-9). Despite the past stability of the African carbon sink, our most intensively monitored plots suggest a post-2010 increase in carbon losses, delayed compared to Amazonia, indicating asynchronous carbon sink saturation on the two continents. A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth'  s intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass(10) reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth'  s climate.


  
Microbial feedbacks optimize ocean iron availability 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (9) : 4842-4849
作者:  Lauderdale, Jonathan Maitland;  Braakman, Rogier;  Forget, Gael;  Dutkiewicz, Stephanie;  Follows, Michael J.
收藏  |  浏览/下载:8/0  |  提交时间:2020/05/13
dissolved iron  organic ligands  ocean productivity  macronutrients  colimitation  
Dark biological superoxide production as a significant flux and sink of marine dissolved oxygen 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (7) : 3433-3439
作者:  Sutherland, Kevin M.;  Wankel, Scott D.;  Hansel, Colleen M.
收藏  |  浏览/下载:9/0  |  提交时间:2020/05/13
microbial superoxide  reactive oxygen species  marine dissolved oxygen  
The oceanic sink for anthropogenic CO2 from 1994 to 2007 期刊论文
SCIENCE, 2019, 363 (6432) : 1193-+
作者:  Gruber, Nicolas;  Clement, Dominic;  Carter, Brendan R.;  Feely, Richard A.;  van Heuven, Steven;  Hoppema, Mario;  Ishii, Masao;  Key, Robert M.;  Kozyr, Alex;  Lauvset, Siv K.;  Lo Monaco, Claire;  Mathis, Jeremy T.;  Murata, Akihiko;  Olsen, Are;  Perez, Fiz F.;  Sabine, Christopher L.;  Tanhua, Toste;  Wanninkhof, Rik
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
Decadal trends in the ocean carbon sink 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (24) : 11646-11651
作者:  DeVries, Tim;  Le Quere, Corinne;  Andrews, Oliver;  Berthet, Sarah;  Hauck, Judith;  Ilyina, Tatiana;  Landschuetzer, Peter;  Lenton, Andrew;  Lima, Ivan D.;  Nowicki, Michael;  Schwinger, Jorg;  Seferian, Roland
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
carbon dioxide  ocean carbon sink  terrestrial carbon sink  climate variability  carbon budget  
Anthropogenic drivers of 2013-2017 trends in summer surface ozone in China 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (2) : 422-427
作者:  Li, Ke;  Jacob, Daniel J.;  Liao, Hong;  Shen, Lu;  Zhang, Qiang;  Bates, Kelvin H.
收藏  |  浏览/下载:48/0  |  提交时间:2019/11/27
surface ozone  China  aerosol chemistry  emission reductions  air quality  
Role of forest regrowth in global carbon sink dynamics 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (10) : 4382-4387
作者:  Pugh, Thomas A. M.;  Lindeskog, Mats;  Smith, Benjamin;  Poulter, Benjamin;  Arneth, Almut;  Haverd, Vanessa;  Calle, Leonardo
收藏  |  浏览/下载:62/0  |  提交时间:2019/11/27
forest  carbon sink  regrowth  demography  disturbance  
Proglacial freshwaters are significant and previously unrecognized sinks of atmospheric CO2 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (36) : 17690-17695
作者:  St Pierre, Kyra A.;  St Louis, Vincent L.;  Schiff, Sherry L.;  Lehnherr, Igor;  Dainard, Paul G.;  Gardner, Alex S.;  Aukes, Pieter J. K.;  Sharp, Martin J.
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
glacial meltwaters  carbon  biogeochemistry  freshwater  
North America's oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (7) : 2749-2754
作者:  Giguere-Croteau, Claudie;  Boucher, Etienne;  Bergeron, Yves;  Girardin, Martin P.;  Drobyshev, Igor;  Silva, Lucas C. R.;  Helie, Jean-Francois;  Garneau, Michelle
收藏  |  浏览/下载:14/0  |  提交时间:2019/11/27
water use efficiency  carbon dioxide  stable isotopes  productivity  boreal forest  
Influences of light and humidity on carbonyl sulfide-based estimates of photosynthesis 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (7) : 2470-2475
作者:  Kooijmans, Linda M. J.;  Sun, Wu;  Aalto, Juho;  Erkkila, Kukka-Maaria;  Maseyk, Kadmiel;  Seibt, Ulrike;  Vesala, Timo;  Mammarella, Ivan;  Chen, Huilin
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
carbonyl sulfide  photosynthesis  stomatal conductance  carbon cycle