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Global Measurements of Brown Carbon and Estimated Direct Radiative Effects 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (13)
作者:  Zeng, Linghan;  Zhang, Aoxing;  Wang, Yuhang;  Wagner, Nicholas L.;  Katich, Joseph M.;  Schwarz, Joshua P.;  Schill, Gregory P.;  Brock, Charles;  Froyd, Karl D.;  Murphy, Daniel M.;  Williamson, Christina J.;  Kupc, Agnieszka;  Scheuer, Eric;  Dibb, Jack;  Weber, Rodney J.
收藏  |  浏览/下载:14/0  |  提交时间:2020/06/22
aerosol  light absorption  brown carbon  radiation forcing  black carbon  biomass burning  
Monumental architecture at Aguada Fenix and the rise of Maya civilization 期刊论文
NATURE, 2020
作者:  Bedding, Timothy R.;  Murphy, Simon J.;  Hey, Daniel R.;  Huber, Daniel;  Li, Tanda;  Smalley, Barry;  Stello, Dennis;  White, Timothy R.;  Ball, Warrick H.;  Chaplin, William J.;  Colman, Isabel L.;  Fuller, Jim;  Gaidos, Eric;  Harbeck, Daniel R.;  Hermes, J. J.;  Holdsworth, Daniel L.;  Li, Gang;  Li, Yaguang;  Mann, Andrew W.;  Reese, Daniel R.;  Sekaran, Sanjay;  Yu, Jie;  Antoci, Victoria;  Bergmann, Christoph;  Brown, Timothy M.;  Howard, Andrew W.;  Ireland, Michael J.;  Isaacson, Howard;  Jenkins, Jon M.;  Kjeldsen, Hans;  McCully, Curtis;  Rabus, Markus;  Rains, Adam D.;  Ricker, George R.;  Tinney, Christopher G.;  Vanderspek, Roland K.
收藏  |  浏览/下载:30/0  |  提交时间:2020/07/03

Archaeologists have traditionally thought that the development of Maya civilization was gradual, assuming that small villages began to emerge during the Middle Preclassic period (1000-350 bc  dates are calibrated throughout) along with the use of ceramics and the adoption of sedentism(1). Recent finds of early ceremonial complexes are beginning to challenge this model. Here we describe an airborne lidar survey and excavations of the previously unknown site of Aguada Fenix (Tabasco, Mexico) with an artificial plateau, which measures 1,400 m in length and 10 to 15 m in height and has 9 causeways radiating out from it. We dated this construction to between 1000 and 800 bc using a Bayesian analysis of radiocarbon dates. To our knowledge, this is the oldest monumental construction ever found in the Maya area and the largest in the entire pre-Hispanic history of the region. Although the site exhibits some similarities to the earlier Olmec centre of San Lorenzo, the community of Aguada Fenix probably did not have marked social inequality comparable to that of San Lorenzo. Aguada Fenix and other ceremonial complexes of the same period suggest the importance of communal work in the initial development of Maya civilization.


Lidar survey of the Maya lowlands uncovers the monumental site of Aguada Fenix, which dates to around 1000-800 bc and points to the role of communal construction in the development of Maya civilization.


  
Model-measurement consistency and limits of bioaerosol abundance over the continental United States 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (22) : 13859-13870
作者:  Zawadowicz, Maria A.;  Froyd, Karl D.;  Perring, Anne E.;  Murphy, Daniel M.;  Spracklen, Dominick, V;  Heald, Colette L.;  Buseck, Peter R.;  Cziczo, Daniel J.
收藏  |  浏览/下载:8/0  |  提交时间:2020/02/17
Observationally constrained analysis of sea salt aerosol in the marine atmosphere 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (16) : 10773-10785
作者:  Bian, Huisheng;  Froyd, Karl;  Murphy, Daniel M.;  Dibb, Jack;  Darmenov, Anton;  Chin, Mian;  Colarco, Peter R.;  da Silva, Arlindo;  Kucsera, Tom L.;  Schill, Gregory;  Yu, Hongbin;  Bui, Paul;  Dollner, Maximilian;  Weinzierl, Bernadett;  Smirnov, Alexander
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
The distribution of sea-salt aerosol in the global troposphere 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (6) : 4093-4104
作者:  Murphy, Daniel M.;  Froyd, Karl D.;  Bian, Huisheng;  Brock, Charles A.;  Dibb, Jack E.;  DiGangi, Joshua P.;  Diskin, Glenn;  Dollner, Maximillian;  Kupc, Agnieszka;  Scheuer, Eric M.;  Schill, Gregory P.;  Weinzierf, Bernadett;  Williamson, Christina J.;  Yu, Pengfei
收藏  |  浏览/下载:20/0  |  提交时间:2019/11/26
Efficient In-Cloud Removal of Aerosols by Deep Convection 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (2) : 1061-1069
作者:  Yu, Pengfei;  Froyd, Karl D.;  Portmann, Robert W.;  Toon, Owen B.;  Freitas, Saulo R.;  Bardeen, Charles G.;  Brock, Charles;  Fan, Tianyi;  Gao, Ru-Shan;  Katich, Joseph M.;  Kupc, Agnieszka;  Liu, Shang;  Maloney, Christopher;  Murphy, Daniel M.;  Rosenlof, Karen H.;  Schill, Gregory;  Schwarz, Joshua P.;  Williamson, Christina
收藏  |  浏览/下载:12/0  |  提交时间:2019/04/09
Heterogeneous Ice Nucleation in the Tropical Tropopause Layer 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (21) : 12210-12227
作者:  Jensen, Eric J.;  Kaercher, Bernd;  Ueyama, Rei;  Pfister, Leonhard;  Bui, Theopaul V.;  Diskin, Glenn S.;  DiGangi, Joshua P.;  Woods, Sarah;  Lawson, R. Paul;  Froyd, Karl D.;  Murphy, Daniel M.
收藏  |  浏览/下载:13/0  |  提交时间:2019/04/09
Earth's oldest stable crust in the Pilbara Craton formed by cyclic gravitational overturns 期刊论文
NATURE GEOSCIENCE, 2018, 11 (5) : 357-+
作者:  Wiemer, Daniel;  Schrank, Christoph E.;  Murphy, David T.;  Wenham, Lana;  Allen, Charlotte M.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
Investigating biomass burning aerosol morphology using a laser imaging nephelometer 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2018, 18 (3) : 1879-1894
作者:  Manfred, Katherine M.;  Washenfelder, Rebecca A.;  Wagner, Nicholas L.;  Adler, Gabriela;  Erdesz, Frank;  Womack, Caroline C.;  Lamb, Kara D.;  Schwarz, Joshua P.;  Franchin, Alessandro;  Selimovic, Vanessa;  Yokelson, Robert J.;  Murphy, Daniel M.
收藏  |  浏览/下载:6/0  |  提交时间:2019/04/09
Improved identification of primary biological aerosol particles using single-particle mass spectrometry 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2017, 17 (11)
作者:  Zawadowicz, Maria A.;  Froyd, Karl D.;  Murphy, Daniel M.;  Cziczo, Daniel J.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09