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Subseasonal Prediction of Land Cold Extremes in Boreal Wintertime 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Xiang, Baoqiang;  Sun, Y. Qiang;  Chen, Jan-Huey;  Johnson, Nathaniel C.;  Jiang, Xianan
收藏  |  浏览/下载:12/0  |  提交时间:2020/08/18
subseasonal prediction  extremes  surface air temperature  predictability sources  land-atmosphere coupling  
Representation of low-tropospheric temperature inversions in ECMWF reanalyses over Europe 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (7)
作者:  Palarz, Angelika;  Luterbacher, Juerg;  Ustrnul, Zbigniew;  Xoplaki, Elena;  Celinski-Myslaw, Daniel
收藏  |  浏览/下载:8/0  |  提交时间:2020/08/18
temperature inversions  lower-tropospheric stability  ECMWF reanalyses  upper-air soundings  data evaluation  
Role of Atmospheric Variability in Driving the "Warm-Arctic, Cold-Continent" Pattern Over the North America Sector and Sea Ice Variability Over the Chukchi-Bering Sea 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (13)
作者:  Guan, Weina;  Jiang, Xianan;  Ren, Xuejuan;  Chen, Gang;  Ding, Qinghua
收藏  |  浏览/下载:15/0  |  提交时间:2020/06/09
Arctic warming  surface air temperature  sea ice loss  atmospheric variability  large-scale circulation  
Where Do Cold Air Outbreaks Occur, and How Have They Changed Over Time? 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (13)
作者:  Smith, Erik T.;  Sheridan, Scott C.
收藏  |  浏览/下载:7/0  |  提交时间:2020/05/20
cold air outbreaks  extreme cold events  climate change  polar outbreak  temperature trends  ERA5  
Implementation and Evaluation of an Improved Lake Scheme in Beijing Climate Center Atmosphere-Vegetation Interaction Model 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (9)
作者:  Qiu, Bo;  Huang, Anning;  Shi, Xueli;  Dai, Yongjiu;  Wei, Nan;  Gu, Weidong;  Li, Weiping;  Lazhu;  Zhang, Yanwu;  Fu, Zhipeng;  Ling, Xiaolu
收藏  |  浏览/下载:15/0  |  提交时间:2020/07/02
lake scheme  lake surface temperature  Great Lakes  land surface model  land-air interactions  
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.


  
Rossby Waves Detection in the CO2 and Temperature Multilayer Climate Network 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (2)
作者:  Ying, N.;  Zhou, D.;  Han, Z. G.;  Chen, Q. H.;  Ye, Q.;  Xue, Z. G.
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/02
mid-troposphere CO2 concentrations  surface air temperature  multilayer climate network  Rossby waves  
On the association between characteristics of the atmospheric boundary layer and air pollution concentrations 期刊论文
ATMOSPHERIC RESEARCH, 2020, 231
作者:  Yuval;  Levi, Yoav;  Dayan, Uri;  Levy, Ilan;  Broday, David M.
收藏  |  浏览/下载:5/0  |  提交时间:2020/07/02
Air pollution  Convective boundary layer  Residual boundary layer  Stable boundary layer  Temperature lapse rate  
The past and future of global river ice 期刊论文
NATURE, 2020, 577 (7788) : 69-+
作者:  Yang, Xiao;  Pavelsky, Tamlin M.;  Allen, George H.
收藏  |  浏览/下载:6/0  |  提交时间:2020/05/13

More than one-third of Earth'  s landmass is drained by rivers that seasonally freeze over. Ice transforms the hydrologic(1,2), ecologic(3,4), climatic(5) and socio-economic(6-8) functions of river corridors. Although river ice extent has been shown to be declining in many regions of the world(1), the seasonality, historical change and predicted future changes in river ice extent and duration have not yet been quantified globally. Previous studies of river ice, which suggested that declines in extent and duration could be attributed to warming temperatures(9,10), were based on data from sparse locations. Furthermore, existing projections of future ice extent are based solely on the location of the 0-degrees C isotherm11. Here, using satellite observations, we show that the global extent of river ice is declining, and we project a mean decrease in seasonal ice duration of 6.10 +/- 0.08 days per 1-degrees C increase in global mean surface air temperature. We tracked the extent of river ice using over 400,000 clear-sky Landsat images spanning 1984-2018 and observed a mean decline of 2.5 percentage points globally in the past three decades. To project future changes in river ice extent, we developed an observationally calibrated and validated model, based on temperature and season, which reduced the mean bias by 87 per cent compared with the 0-degree-Celsius isotherm approach. We applied this model to future climate projections for 2080-2100: compared with 2009-2029, the average river ice duration declines by 16.7 days under Representative Concentration Pathway (RCP) 8.5, whereas under RCP 4.5 it declines on average by 7.3 days. Our results show that, globally, river ice is measurably declining and will continue to decline linearly with projected increases in surface air temperature towards the end of this century.


  
Impact of Lake Surface Temperature Variations on Lake Effect Snow Over the Great Lakes Region 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019
作者:  Shi, Qi;  Xue, Pengfei
收藏  |  浏览/下载:13/0  |  提交时间:2020/02/17
Lake Effect Snow  Great Lakes  Lake Surface Temperature  Wind Divergence  Air-Lake Coupled Dynamics