GSTDTAP

浏览/检索结果: 共17条,第1-10条 帮助

限定条件        
已选(0)清除 条数/页:   排序方式:
Late Paleozoic tectonic transition from subduction to post-collisional extension in Eastern Tianshan, Central Asian Orogenic Belt 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (7-8) : 1756-1774
作者:  Muhtar, M. N.;  Wu, Chang-Zhi;  Santosh, M.;  Lei, Ru-Xiong;  Gu, Lian-Xing;  Wang, Si-Meng;  Gan, Kai
收藏  |  浏览/下载:11/0  |  提交时间:2020/08/18
A genetic link between iron oxide-apatite and iron skarn mineralization in the Jinniu volcanic basin, Daye district, eastern China: Evidence from magnetite geochemistry and multi-mineral U-Pb geochronology 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (5-6) : 899-917
作者:  Hu, Hao;  Li, Jian-Wei;  Harlov, Daniel E.;  Lentz, David R.;  Mcfarlane, Chris R. M.;  Yang, Yue-Heng
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
Engineering covalently bonded 2D layered materials by self-intercalation 期刊论文
NATURE, 2020, 581 (7807) : 171-+
作者:  Shang, Jian;  Ye, Gang;  Shi, Ke;  Wan, Yushun;  Luo, Chuming;  Aihara, Hideki;  Geng, Qibin;  Auerbach, Ashley;  Li, Fang
收藏  |  浏览/下载:11/0  |  提交时间:2020/07/03

Two-dimensional (2D) materials(1-5) offer a unique platform from which to explore the physics of topology and many-body phenomena. New properties can be generated by filling the van der Waals gap of 2D materials with intercalants(6,7)  however, post-growth intercalation has usually been limited to alkali metals(8-10). Here we show that the self-intercalation of native atoms(11,12) into bilayer transition metal dichalcogenides during growth generates a class of ultrathin, covalently bonded materials, which we name ic-2D. The stoichiometry of these materials is defined by periodic occupancy patterns of the octahedral vacancy sites in the van der Waals gap, and their properties can be tuned by varying the coverage and the spatial arrangement of the filled sites(7,13). By performing growth under high metal chemical potential(14,15) we can access a range of tantalum-intercalated TaS(Se)(y), including 25% Ta-intercalated Ta9S16, 33.3% Ta-intercalated Ta7S12, 50% Ta-intercalated Ta10S16, 66.7% Ta-intercalated Ta8Se12 (which forms a Kagome lattice) and 100% Ta-intercalated Ta9Se12. Ferromagnetic order was detected in some of these intercalated phases. We also demonstrate that self-intercalated V11S16, In11Se16 and FexTey can be grown under metal-rich conditions. Our work establishes self-intercalation as an approach through which to grow a new class of 2D materials with stoichiometry- or composition-dependent properties.


  
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.


  
Significant emissions of dimethyl sulfide and monoterpenes by big-leaf mahogany trees: discovery of a missing dimethyl sulfide source to the atmospheric environment 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (1) : 375-389
作者:  Vettikkat, Lejish;  Sinha, Vinayak;  Datta, Savita;  Kumar, Ashish;  Hakkim, Haseeb;  Yadav, Priya;  Sinha, Baerbel
收藏  |  浏览/下载:6/0  |  提交时间:2020/07/02
Tailored multifunctional micellar brushes via crystallization-driven growth from a surface 期刊论文
SCIENCE, 2019, 366 (6469) : 1095-+
作者:  Cai, Jiandong;  Li, Chen;  Kong, Na;  Lu, Yi;  Lin, Geyu;  Wang, Xinyan;  Yao, Yuan;  Manners, Ian;  Qiu, Huibin
收藏  |  浏览/下载:10/0  |  提交时间:2020/02/17
Chemotaxis as a navigation strategy to boost range expansion 期刊论文
Nature, 2019, 575
作者:  Jonas Cremer;  Tomoya Honda;  Ying Tang;  Jerome Wong-Ng;  Massimo Vergassola;  Terence Hwa
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
U-Pb and oxygen isotope characteristics of Timanian- and Caledonian-age detrital zircons from the Brooks Range, Arctic Alaska, USA 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2019, 131: 1459-1479
作者:  Robinson, F. A.;  Toro, J.;  Pease, V
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
Carbonate stable and clumped isotopic evidence for late Eocene moderate to high elevation of the east-central Tibetan Plateau and its geodynamic implications 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2019, 131: 831-844
作者:  Li, Lin;  Fan, Majie;  Davila, Nathaniel;  Jesmok, Greg;  Mitsunaga, Bryce;  Tripati, Aradhna;  Orme, Devon
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/26
Attribution of recent increases in atmospheric methane through 3-D inverse modelling 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2018, 18 (24) : 18149-18168
作者:  McNorton, Joe;  Wilson, Chris;  Gloor, Manuel;  Parker, Rob J.;  Boesch, Hartmut;  Feng, Wuhu;  Hossaini, Ryan;  Chipperfield, Martyn P.
收藏  |  浏览/下载:13/0  |  提交时间:2019/04/09