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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.


  
Structure, Variability, and Mean-Flow Interactions of the January 2015 Quasi-2-Day Wave at Middle and High Southern Latitudes 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (12) : 5981-6008
作者:  Fritts, David C.;  Iimura, Hiroyuki;  Janches, Diego;  Lieberman, Ruth S.;  Riggin, Dennis M.;  Mitchell, Nicholas J.;  Vincent, Robert A.;  Reid, Iain M.;  Murphy, Damian J.;  Tsutsumi, Masaki;  Kavanagh, Andrew J.;  Batista, Paulo P.;  Hocking, Wayne K.
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/26
quasi-2-day wave  quasi-2-day wave transience  planetary-wave  mean-flow interactions  planetary-wave Eliassen-Palm fluxes  
Momentum Flux Spectra of a Mountain Wave Event Over New Zealand 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (18) : 9980-9991
作者:  Bossert, Katrina;  Fritts, David C.;  Heale, Christopher J.;  Eckermann, Stephen D.;  Plane, John M. C.;  Snively, Jonathan B.;  Williams, Bifford P.;  Reid, Iain M.;  Murphy, Damian J.;  Spargo, Andrew J.;  MacKinnon, Andrew D.
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
gravity waves  mountain waves  momentum flux  DEEPWAVE