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On the relationship between cloud water composition and cloud droplet number concentration 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (13) : 7645-7665
作者:  MacDonald, Alexander B.;  Mardi, Ali Hossein;  Dadashazar, Hossein;  Aghdam, Mojtaba Azadi;  Crosbie, Ewan;  Jonsson, Haflidi H.;  Flagan, Richard C.;  Seinfeld, John H.;  Sorooshian, Armin
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/06
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:18/0  |  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.


  
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  
Advances in Quantifying Streamflow Variability Across Continental Scales: 2. Improved Model Regionalization and Prediction Uncertainties Using Hierarchical Bayesian Methods 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (12) : 11061-11087
作者:  Alexander, Richard B.;  Schwarz, Gregory E.;  Boyer, Elizabeth W.
收藏  |  浏览/下载:8/0  |  提交时间:2020/02/16
hierarchical Bayesian  hydrological modeling  SPARROW  regionalization methods  
Advances in Quantifying Streamflow Variability Across Continental Scales: 1. Identifying Natural and Anthropogenic Controlling Factors in the USA Using a Spatially Explicit Modeling Method 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (12) : 10893-10917
作者:  Alexander, Richard B.;  Schwarz, Gregory E.;  Boyer, Elizabeth W.
收藏  |  浏览/下载:5/0  |  提交时间:2020/02/16
Effects of Biomass Burning on Stratocumulus Droplet Characteristics, Drizzle Rate, and Composition 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (22) : 12301-12318
作者:  Mardi, Ali Hossein;  Dadashazar, Hossein;  MacDonald, Alexander B.;  Crosbie, Ewan;  Coggon, Matthew M.;  Aghdam, Mojtaba Azadi;  Woods, Roy K.;  Jonsson, Haflidi H.;  Flagan, Richard C.;  Seinfeld, John H.;  Sorooshian, Armin
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
Biomass Burning  Stratocumulus  Aerosol  Cloud  EVS-3  ACTIVATE  
The formation of human populations in South and Central Asia 期刊论文
SCIENCE, 2019, 365 (6457) : 999-+
作者:  Narasimhan, Vagheesh M.;  Patterson, Nick;  Moorjani, Priya;  Rohland, Nadin;  Bernardos, Rebecca;  Mallick, Swapan;  Lazaridis, Losif;  Nakatsuka, Nathan;  Olalde, Iffigo;  Lipson, Mark;  Kim, Alexander M.;  Olivieri, Luca M.;  Coppa, Alfredo;  Vidale, Massimo;  Mallory, James;  Moiseyev, Vyacheslav;  Kitov, Egor;  Monge, Janet;  Adamski, Nicole;  Alexi, Neel;  Broomandkhoshbacht, Nasreen;  Candilio, Francesca;  Callan, Kimberly;  Cheronet, Olivia;  Culleton, Brendan J.;  Ferry, Matthew;  Fernandes, Daniel;  Freilih, Suzanne;  Gamarra, Beatriz;  Gaudio, Daniel;  Hajdinjak, Mateja;  Harney, Eadaoin;  Harper, Thomas K.;  Keatin, Denise;  Lawson, Ann Marie;  Mah, Matthew;  Mandl, Kirsten;  Michel, Megan;  Novak, Mario;  Oppenheimer, Jonas;  Rai, Niraj;  Sirak, Kendra;  Slon, Viviane;  Stewardson, Kristin;  Zalzala, Fatma;  Zhang, Zhao;  Akhatov, Gaziz;  Bagashev, Anatoly N.;  Bagnera, Alessandra;  Baitanayev, Bauryzhan;  Bendezu-Sarmiento, Julio;  Bissembaev, Arman A.;  Bonora, Gian Luca;  Chargynov, Temirlan T.;  Chikisheva, Tatiana;  Dashkovskiy, Petr K.;  Derevianko, Anatoly;  Dobes, Miroslav;  Douka, Katerina;  Dubova, Nadezhda;  Duisengali, Meiram N.;  Enshin, Dmitry;  Epimakhov, Andrey;  Fribus, Alexey V.;  Fuller, Dorian;  Goryachev, Alexander;  Gromov, Andrey;  Grushin, Sergey P.;  Hanks, Bryan;  Judd, Margaret;  Kazizov, Erlan;  Khokhlov, Aleksander;  Krygin, Aleksander P.;  Kupriyanova, Elena;  Kuznetsov, Pavel;  Luiseli, Donata;  Maksudov, Farhod;  Mamedov, Asian M.;  Mamirov, Talgat B.;  Meiklejohn, Christopher;  Merrett, Deborah C.;  Micheli, Roberto;  Mochalov, Oleg;  Mustafokulov, Samariddin;  Nayak, Ayushi;  Pettener, Davide;  Potts, Richard;  Razhev, Dmitry;  Rykun, Marina;  Sarno, Stefania;  Savenkova, Tatyana M.;  Sikhymbaeva, Kulyan;  Slepchenko, Sergey M.;  Soltobaev, Oroz A.;  Stepanova, Nadezhda;  Svyatko, Svetlana;  Tabaldiev, Kubatbek;  Teschler-Nicola, Maria;  Tishkin, Alexey A.;  Tkachev, Vitaly V.;  Vasilyev, Sergey;  Veleminsky, Petr;  Voyakin, Dmitriy;  Yermolayeva, Antonina;  Zahir, Muhammad;  Zubkov, Valery S.;  Zubova, Alisa;  Shinde, Vasant S.;  Lalueza-Fox, Carles;  Meyer, Matthias;  Anthony, David;  Boivin, Nicole;  Thangaraj, Kumnarasamy;  Kennett, Douglas J.;  Frachetti, Michael;  Pinhasi, Ron;  Reich, David
收藏  |  浏览/下载:22/0  |  提交时间:2019/11/27
Rethinking resilience to wildfire 期刊论文
NATURE SUSTAINABILITY, 2019, 2 (9) : 797-804
作者:  McWethy, David B.;  Schoennagel, Tania;  Higuera, Philip E.;  Krawchuk, Meg;  Harvey, Brian J.;  Metcalf, Elizabeth C.;  Schultz, Courtney;  Miller, Carol;  Metcalf, Alexander L.;  Buma, Brian;  Virapongse, Arika;  Kulig, Judith C.;  Stedman, Richard C.;  Ratajczak, Zak;  Nelson, Cara R.;  Kolden, Crystal
收藏  |  浏览/下载:6/0  |  提交时间:2020/08/19
Small Ponds in Headwater Catchments Are a Dominant Influence on Regional Nutrient and Sediment Budgets 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (16) : 9669-9677
作者:  Schmadel, Noah M.;  Harvey, Judson W.;  Schwarz, Gregory E.;  Alexander, Richard B.;  Gomez-Velez, Jesus D.;  Scott, Durelle;  Ator, Scott W.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
Arctic marine secondary organic aerosol contributes significantly to summertime particle size distributions in the Canadian Arctic Archipelago 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (5) : 2787-2812
作者:  Croft, Betty;  Martin, Randall, V;  Leaitch, W. Richard;  Burkart, Julia;  Chang, Rachel Y-W;  Collins, Douglas B.;  Hayes, Patrick L.;  Hodshire, Anna L.;  Huang, Lin;  Kodros, John K.;  Moravek, Alexander;  Mungall, Emma L.;  Murphy, Jennifer G.;  Sharma, Sangeeta;  Tremblay, Samantha;  Wentworth, Gregory R.;  Willis, Megan D.;  Abbate, Jonathan P. D.;  Pierce, Jeffrey R.
收藏  |  浏览/下载:11/0  |  提交时间:2019/04/09