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Strong anthropogenic control of secondary organic aerosol formation from isoprene in Beijing 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (12) : 7531-7552
作者:  Bryant, Daniel J.;  Dixon, William J.;  Hopkins, James R.;  Dunmore, Rachel E.;  Pereira, Kelly;  Shaw, Marvin;  Squires, Freya A.;  Bannan, Thomas J.;  Mehra, Archit;  Worrall, Stephen D.;  Bacak, Asan;  Coe, Hugh;  Percival, Carl J.;  Whalley, Lisa K.;  Heard, Dwayne E.;  Slater, Eloise J.;  Ouyang, Bin;  Cui, Tianqu;  Surratt, Jason D.;  Liu, Di;  Shi, Zongbo;  Harrison, Roy;  Sun, Yele;  Xu, Weiqi;  Lewis, Alastair C.;  Lee, James D.;  Rickard, Andrew R.;  Hamilton, Jacqueline F.
收藏  |  浏览/下载:15/0  |  提交时间:2020/08/18
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:23/0  |  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.


  
Cyber Incidents Attributed to China 科技报告
来源:Center for Strategic and International Studies (CSIS). 出版年: 2013
作者:  James Andrew Lewis
收藏  |  浏览/下载:10/0  |  提交时间:2019/04/05
China  Cybersecurity  Cybersecurity and Technology  Defense and Security  Economics  Energy and Geopolitics  Geopolitics and International Security  Military Technology  Strategic Technologies Program  
Critical Questions for 2012 科技报告
来源:Center for Strategic and International Studies (CSIS). 出版年: 2012
作者:  Jennifer G. Cooke;  Bonnie S. Glaser;  James Andrew Lewis;  Frank A. Verrastro
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/05
Afghanistan  Africa  Americas  Arctic  Asia  Australia  New Zealand & Pacific  Caribbean  Central Asia  China  Climate Change and Environmental Impacts  Counterterrorism and Homeland Security  Cybersecurity  Cybersecurity and Technology  Defense Industry  Acquisition  and Innovation  Defense Strategy and Capabilities  Defense and Security  Economics  Energy and Geopolitics  Energy and Sustainability  Europe  European Union  Food and Agriculture  Geopolitics and International Security  Global Health  Governance and Rule of Law  Human Rights  India  Infectious Disease  Innovation and New Energy Sources  International Development  Japan  Korea  Markets  Trends  and Outlooks  Middle East  NATO  North Africa  North America  Pakistan  Post-Soviet Europe  Private Sector Development  Russia  Russia and Eurasia  South America  Southeast Asia  Space  Sub-Saharan Africa  The South Caucasus  Turkey  U.S. Development Policy  U.S.-EU Partnership Committee for Ukraine  Weapons of Mass Destruction Proliferation  
Earth Observation for Climate Change 科技报告
来源:Center for Strategic and International Studies (CSIS). 出版年: 2010
作者:  James Andrew Lewis;  Sarah Ladislaw;  Denise E. Zheng
收藏  |  浏览/下载:1/0  |  提交时间:2019/04/05
Analysis  Climate Change and Environmental Impacts  Cybersecurity and Technology  Energy and National Security Program  Energy and Sustainability  Space  Strategic Technologies Program  Technology and Innovation