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A remnant planetary core in the hot-Neptune desert 期刊论文
NATURE, 2020, 583 (7814) : 39-+
作者:  David J. Armstrong;  Thé;  o A. Lopez;  Vardan Adibekyan;  Richard A. Booth;  Edward M. Bryant;  Karen A. Collins;  Magali Deleuil;  Alexandre Emsenhuber;  Chelsea X. Huang;  George W. King;  Jorge Lillo-Box;  Jack J. Lissauer;  Elisabeth Matthews;  Olivier Mousis;  Louise D. Nielsen;  Hugh Osborn;  Jon Otegi;  Nuno C. Santos;  ;  rgio G. Sousa;  Keivan G. Stassun;  Dimitri Veras;  Carl Ziegler;  Jack S. Acton;  Jose M. Almenara;  David R. Anderson;  David Barrado;  Susana C. C. Barros;  Daniel Bayliss;  Claudia Belardi;  Francois Bouchy;  ;  sar Briceñ;  o;  Matteo Brogi;  David J. A. Brown;  Matthew R. Burleigh;  Sarah L. Casewell;  Alexander Chaushev;  David R. Ciardi;  Kevin I. Collins;  Knicole D. Coló;  n;  Benjamin F. Cooke;  Ian J. M. Crossfield;  Rodrigo F. Dí;  az;  Elisa Delgado Mena;  Olivier D. S. Demangeon;  Caroline Dorn;  Xavier Dumusque;  Philipp Eigmü;  ller;  Michael Fausnaugh;  Pedro Figueira;  Tianjun Gan;  Siddharth Gandhi;  Samuel Gill;  Erica J. Gonzales;  Michael R. Goad;  Maximilian N. Gü;  nther;  Ravit Helled;  Saeed Hojjatpanah;  Steve B. Howell;  James Jackman;  James S. Jenkins;  Jon M. Jenkins;  Eric L. N. Jensen;  Grant M. Kennedy;  David W. Latham;  Nicholas Law;  Monika Lendl;  Michael Lozovsky;  Andrew W. Mann;  Maximiliano Moyano;  James McCormac;  Farzana Meru;  Christoph Mordasini;  Ares Osborn;  Don Pollacco;  Didier Queloz;  Liam Raynard;  George R. Ricker;  Pamela Rowden;  Alexandre Santerne;  Joshua E. Schlieder;  Sara Seager;  Lizhou Sha;  Thiam-Guan Tan;  Rosanna H. Tilbrook;  Eric Ting;  Sté;  phane Udry;  Roland Vanderspek;  Christopher A. Watson;  Richard G. West;  Paul A. Wilson;  Joshua N. Winn;  Peter Wheatley;  Jesus Noel Villasenor;  Jose I. Vines;  Zhuchang Zhan
收藏  |  浏览/下载:17/0  |  提交时间:2020/07/06

The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of planetary cores. Exoplanets that have undergone rare evolutionary processes provide a route to understanding planetary interiors. Planets found in and near the typically barren hot-Neptune '  desert'  (1,2)(a region in mass-radius space that contains few planets) have proved to be particularly valuable in this regard. These planets include HD149026b(3), which is thought to have an unusually massive core, and recent discoveries such as LTT9779b(4)and NGTS-4b(5), on which photoevaporation has removed a substantial part of their outer atmospheres. Here we report observations of the planet TOI-849b, which has a radius smaller than Neptune'  s but an anomalously large mass of39.1-2.6+2.7Earth masses and a density of5.2-0.8+0.7grams per cubic centimetre, similar to Earth'  s. Interior-structure models suggest that any gaseous envelope of pure hydrogen and helium consists of no more than3.9-0.9+0.8 per cent of the total planetary mass. The planet could have been a gas giant before undergoing extreme mass loss via thermal self-disruption or giant planet collisions, or it could have avoided substantial gas accretion, perhaps through gap opening or late formation(6). Although photoevaporation rates cannot account for the mass loss required to reduce a Jupiter-like gas giant, they can remove a small (a few Earth masses) hydrogen and helium envelope on timescales of several billion years, implying that any remaining atmosphere on TOI-849b is likely to be enriched by water or other volatiles from the planetary interior. We conclude that TOI-849b is the remnant core of a giant planet.


Observations of TOI-849b reveal a radius smaller than Neptune'  s but a large mass of about 40 Earth masses, indicating that the planet is the remnant core of a gas giant.


  
Arctic Reactive Bromine Events Occur in Two Distinct Sets of Environmental Conditions: A Statistical Analysis of 6 Years of Observations 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (10)
作者:  Swanson, William F.;  Graham, Kelly A.;  Halfacre, John W.;  Holmes, Christopher D.;  Shepson, Paul B.;  Simpson, William R.
收藏  |  浏览/下载:12/0  |  提交时间:2020/07/02
tropospheric chemistry  Arctic  bromine  statistical analysis  meteorology  sea ice  
Nitrogen and phosphorus constrain the CO2 fertilization of global plant biomass (vol 21, pg 561, 2020) 期刊论文
NATURE CLIMATE CHANGE, 2020, 10 (7) : 696-697
作者:  Terrer, Cesar;  Jackson, Robert B.;  Prentice, I. Colin;  Keenan, Trevor F.;  Kaiser, Christina;  Vicca, Sara;  Fisher, Joshua B.;  Reich, Peter B.;  Stocker, Benjamin D.;  Hungate, Bruce A.;  Penuelas, Josep;  McCallum, Ian;  Soudzilovskaia, Nadejda A.;  Cernusak, Lucas A.;  Talhelm, Alan F.;  Van Sundert, Kevin;  Piao, Shilong;  Newton, Paul C. D.;  Hovenden, Mark J.;  Blumenthal, Dana M.;  Liu, Yi Y.;  Mueller, Christoph;  Winter, Klaus;  Field, Christopher B.;  Viechtbauer, Wolfgang;  Van Lissa, Caspar J.;  Hoosbeek, Marcel R.;  Watanabe, Makoto;  Koike, Takayoshi;  Leshyk, Victor O.;  Polley, H. Wayne;  Franklin, Oskar
收藏  |  浏览/下载:31/0  |  提交时间:2020/06/01
Increasing contribution of peatlands to boreal evapotranspiration in a warming climate 期刊论文
NATURE CLIMATE CHANGE, 2020, 10 (6) : 555-+
作者:  Helbig, Manuel;  Waddington, James Michael;  Alekseychik, Pavel;  Amiro, Brian D.;  Aurela, Mika;  Barr, Alan G.;  Black, T. Andrew;  Blanken, Peter D.;  Carey, Sean K.;  Chen, Jiquan;  Chi, Jinshu;  Desai, Ankur R.;  Dunn, Allison;  Euskirchen, Eugenie S.;  Flanagan, Lawrence B.;  Forbrich, Inke;  Friborg, Thomas;  Grelle, Achim;  Harder, Silvie;  Heliasz, Michal;  Humphreys, Elyn R.;  Ikawa, Hiroki;  Isabelle, Pierre-Erik;  Iwata, Hiroki;  Jassal, Rachhpal;  Korkiakoski, Mika;  Kurbatova, Juliya;  Kutzbach, Lars;  Lindroth, Anders;  Lofvenius, Mikaell Ottosson;  Lohila, Annalea;  Mammarella, Ivan;  Marsh, Philip;  Maximov, Trofim;  Melton, Joe R.;  Moore, Paul A.;  Nadeau, Daniel F.;  Nicholls, Erin M.;  Nilsson, Mats B.;  Ohta, Takeshi;  Peichl, Matthias;  Petrone, Richard M.;  Petrov, Roman;  Prokushkin, Anatoly;  Quinton, William L.;  Reed, David E.;  Roulet, Nigel T.;  Runkle, Benjamin R. K.;  Sonnentag, Oliver;  Strachan, Ian B.;  Taillardat, Pierre;  Tuittila, Eeva-Stiina;  Tuovinen, Juha-Pekka;  Turner, Jessica;  Ueyama, Masahito;  Varlagin, Andrej;  Wilmking, Martin;  Wofsy, Steven C.;  Zyrianov, Vyacheslav
收藏  |  浏览/下载:14/0  |  提交时间:2020/05/13
Scaling up zero-deforestation initiatives through public-private partnerships: A look inside post-conflict Colombia 期刊论文
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS, 2020, 62
作者:  Furumo, Paul R.;  Lambin, Eric F.
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/02
Agenda setting  Global forest governance  Low-emissions rural development  Post-conflict  REDD  Sustainable supply chains  
Missing OH reactivity in the global marine boundary layer 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (6) : 4013-4029
作者:  Thames, Alexander B.;  Brune, William H.;  Miller, David O.;  Allen, Hannah M.;  Apel, Eric C.;  Blake, Donald R.;  Bui, T. Paul;  Commane, Roisin;  Crounse, John D.;  Daube, Bruce C.;  Diskin, Glenn S.;  DiGangi, Joshua P.;  Elkins, JamesW.;  Hall, Samuel R.;  Hanisco, Thomas F.;  Hannun, Reem A.;  Hintsa, Eric;  Hornbrook, Rebecca S.;  Kim, Michelle J.;  McKain, Kathryn;  Moore, Fred L.;  Nicely, Julie M.;  Peischl, Jeffrey;  Ryerson, Thomas B.;  St Clair, Jason M.;  Sweeney, Colm;  Teng, Alex;  Thompson, Chelsea R.;  Ullmann, Kirk;  Wennberg, Paul O.;  Wolfe, Glenn M.
收藏  |  浏览/下载:14/0  |  提交时间:2020/07/02
Environmental reservoir dynamics predict global infection patterns and population impacts for the fungal disease white-nose syndrome 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (13) : 7255-7262
作者:  Hoyt, Joseph R.;  Langwig, Kate E.;  Sun, Keping;  Parise, Katy L.;  Li, Aoqiang;  Wang, Yujuan;  Huang, Xiaobin;  Worledge, Lisa;  Miller, Helen;  White, J. Paul;  Kaarakka, Heather M.;  Redell, Jennifer A.;  Gorfol, Tamas;  Boldogh, Sandor Andras;  Fukui, Dai;  Sakuyama, Muneki;  Yachimori, Syuuji;  Sato, Akiyoshi;  Dalannast, Munkhnast;  Jargalsaikhan, Ariunbold;  Batbayar, Nyambayar;  Yovel, Yossi;  Amichai, Eran;  Natradze, Ioseb;  Frick, Winifred F.;  Foster, Jeffrey T.;  Feng, Jiang;  Kilpatrick, A. Marm
收藏  |  浏览/下载:14/0  |  提交时间:2020/05/13
environmental pathogen reservoir  global disease dynamics  white-nose syndrome  Pseudogymnoascus destructans  
Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  Gray, William R.;  Wills, Robert C. J.;  Rae, James W. B.;  Burke, Andrea;  Ivanovic, Ruza F.;  Roberts, William H. G.;  Ferreira, David;  Valdes, Paul J.
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
North Pacific  deglaciation  gyre circulation  westerlies  oxygen isotopes  climate models  
Spatial heterogeneity in CO2, CH4, and energy fluxes: insights from airborne eddy covariance measurements over the Mid-Atlantic region 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (3)
作者:  Hannun, Reem A.;  Wolfe, Glenn M.;  Kawa, S. Randy;  Hanisco, Thomas F.;  Newman, Paul A.;  Alfieri, Joseph G.;  Barrick, John;  Clark, Kenneth L.;  DiGangi, Joshua P.;  Diskin, Glenn S.;  King, John;  Kustas, William P.;  Mitra, Bhaskar;  Noormets, Asko;  Nowak, John B.;  Thornhill, K. Lee;  Vargas, Rodrigo
收藏  |  浏览/下载:12/0  |  提交时间:2020/07/02
airborne eddy covariance  CO2 and CH4  fluxes  biosphere-atmosphere exchange  
Initial results from the InSight mission on Mars 期刊论文
NATURE GEOSCIENCE, 2020, 13 (3) : 183-+
作者:  Banerdt, W. Bruce;  Smrekar, Suzanne E.;  Banfield, Don;  Giardini, Domenico;  Golombek, Matthew;  Johnson, Catherine L.;  Lognonne, Philippe;  Spiga, Aymeric;  Spohn, Tilman;  Perrin, Clement;  Staehler, Simon C.;  Antonangeli, Daniele;  Asmar, Sami;  Beghein, Caroline;  Bowles, Neil;  Bozdag, Ebru;  Chi, Peter;  Christensen, Ulrich;  Clinton, John;  Collins, Gareth S.;  Daubar, Ingrid;  Dehant, Veronique;  Drilleau, Melanie;  Fillingim, Matthew;  Folkner, William;  Garcia, Raphael F.;  Garvin, Jim;  Grant, John;  Grott, Matthias;  Grygorczuk, Jerzy;  Hudson, Troy;  Irving, Jessica C. E.;  Kargl, Guenter;  Kawamura, Taichi;  Kedar, Sharon;  King, Scott;  Knapmeyer-Endrun, Brigitte;  Knapmeyer, Martin;  Lemmon, Mark;  Lorenz, Ralph;  Maki, Justin N.;  Margerin, Ludovic;  McLennan, Scott M.;  Michaut, Chloe;  Mimoun, David;  Mittelholz, Anna;  Mocquet, Antoine;  Morgan, Paul;  Mueller, Nils T.;  Murdoch, Naomi;  Nagihara, Seiichi;  Newman, Claire;  Nimmo, Francis;  Panning, Mark;  Pike, W. Thomas;  Plesa, Ana-Catalina;  Rodriguez, Sebastien;  Rodriguez-Manfredi, Jose Antonio;  Russell, Christopher T.;  Schmerr, Nicholas;  Siegler, Matt;  Stanley, Sabine;  Stutzmann, Eleanore;  Teanby, Nicholas;  Tromp, Jeroen;  Van Driel, Martin;  Warner, Nicholas;  Weber, Renee;  Wieczorek, Mark
收藏  |  浏览/下载:24/0  |  提交时间:2020/05/13