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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:31/0  |  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.


  
Riparian Lowlands in Clay Till Landscapes Part II: Nitrogen Reduction and Release Along Variable Flow Paths 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (4)
作者:  Petersen, R. J.;  Prinds, C.;  Jessen, S.;  Iversen, B. V.;  Kjaergaard, C.
收藏  |  浏览/下载:5/0  |  提交时间:2020/07/02
Riparian lowlands  Nitrogen  Denitrification  Nitrate  Wetlands  Overland flow  
Rapid initialization of retrogressive thaw slumps in the Canadian high Arctic and their response to climate and terrain factors 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (5)
作者:  Jones, Melissa K. Ward;  Pollard, Wayne H.;  Jones, Benjamin M.
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/26
permafrost  thermokarst  retrogressive thaw slumps  landscape change  Eureka sound lowlands  high arctic  climate change  
Temporal Variations of the Mole Fraction, Carbon, and Hydrogen Isotope Ratios of Atmospheric Methane in the Hudson Bay Lowlands, Canada 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (9) : 4695-4711
作者:  Fujita, Ryo;  Morimoto, Shinji;  Umezawa, Taku;  Ishijima, Kentaro;  Patra, Prabir K.;  Worthy, Douglas E. J.;  Goto, Daisuke;  Aoki, Shuji;  Nakazawa, Takakiyo
收藏  |  浏览/下载:15/0  |  提交时间:2019/04/09
methane  carbon and hydrogen isotopes  wetlands  Hudson Bay Lowlands  
Permafrost and lakes control river isotope composition across a boreal Arctic transect in the Western Siberian lowlands 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (3)
作者:  Ala-aho, P.;  Soulsby, C.;  Pokrovsky, O. S.;  Kirpotin, S. N.;  Karlsson, J.;  Serikova, S.;  Manasypov, R.;  Lim, A.;  Krickov, I.;  Kolesnichenko, L. G.;  Laudon, H.;  Tetzlaff, D.
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/09
stable water isotopes  Western Siberia Lowlands  mean transit time  hydrological connectivity  permafrost  
A Stochastic Water Balance Framework for Lowland Watersheds 期刊论文
WATER RESOURCES RESEARCH, 2017, 53 (11)
作者:  Thompson, Sally;  MacVean, Lissa;  Sivapalan, Murugesu
收藏  |  浏览/下载:1/0  |  提交时间:2019/04/09
lowlands  water balance  flood  stochastic  analytic  levee