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The Moving-Boundary Approach for Modeling 2-D Gravity-Driven Stable and Unstable Flow in Partially Wettable Soils 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (5)
作者:  Brindt, Naaran;  Wallach, Rony
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/02
gravity-induced fingering  dynamic water entry value  preferential flow  subcritical water repellency  saturation overshoot  unstable flow modeling  
Low threshold for nitrogen concentration saturation in headwaters increases regional and coastal delivery 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (4)
作者:  Schmadel, Noah M.;  Harvey, Judson W.;  Alexander, Richard B.;  Boyer, Elizabeth W.;  Schwarz, Gregory E.;  Gomez-Velez, Jesus D.;  Scott, Durelle;  Konrad, Christopher P.
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/02
regional nitrogen budget  nitrogen concentration saturation  headwaters  river corridor  
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:26/0  |  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.


  
Eddy Saturation of the Southern Ocean: A Baroclinic Versus Barotropic Perspective 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (21) : 12202-12212
作者:  Constantinou, Navid C.;  Hogg, Andrew McC
收藏  |  浏览/下载:4/0  |  提交时间:2020/02/17
Southern Ocean  Antarctic Circumpolar Current  eddy saturation  ocean eddies  topographic form stress  wind stress  
A new method utilizing smart meter data for identifying the existence of air conditioning in residential homes 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (9)
作者:  Chen, Mo;  Sanders, Kelly T.;  Ban-Weiss, GeorgeA
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
smart meter  residential electricity  air conditioning penetration  saturation  building energy  climate change  urban heat island  
Effects of bedrock type and soil chemistry on the fine roots of European beech - A study on the belowground plasticity of trees 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 444: 256-268
作者:  Kirfel, Kristina;  Heinze, Stefanie;  Hertel, Dietrich;  Leuschner, Christoph
收藏  |  浏览/下载:12/0  |  提交时间:2019/11/27
Base saturation  Depth distribution  Fagus sylvatica  Live:dead ratio  Profile depth  Root system plasticity  Root tips  Specific root area  Subsoil  
Soil solution, foliar concentrations and tree growth response to 8 years of ammonium-nitrate additions in two boreal forests of Quebec, Canada 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 437: 263-271
作者:  Houle, Daniel;  Moore, Jean-David
收藏  |  浏览/下载:6/0  |  提交时间:2019/04/09
Boreal forest  Nitrogen fertilization  Nitrogen saturation  Tree growth  Soil solution  Foliar concentration  
Environmental limits to mammal diversity vary with latitude and global temperature 期刊论文
ECOLOGY LETTERS, 2019, 22 (3) : 480-485
作者:  Brodie, Jedediah F.
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
Community saturation  diversification  diversity-dependence  global climate  latitudinal diversity gradient  speciation  
Saturation Dependence of Non-Fickian Transport in Porous Media 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (2) : 1153-1166
作者:  Hasan, Sharul;  Joekar-Niasar, Vahid;  Karadimitriou, Nikolaos K.;  Sahimi, Muhammad
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/26
dispersion  unsaturated soil  non-Fickian transport  stagnant saturation  relative permeability  pore network model  
Simulation of Capillary Pressure Overshoot in Snow Combining Trapping of the Wetting Phase With a Nonequilibrium Richards Equation Model 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (1) : 236-248
作者:  Leroux, Nicolas R.;  Pomeroy, John W.
收藏  |  浏览/下载:2/0  |  提交时间:2019/04/09
unsaturated flow  snow  capillary overshoot  saturation overshoot  Richards equation  entrapment of wetting phase