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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.


  
Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Jia, Juan;  Cao, Zhenjiao;  Liu, Chengzhu;  Zhang, Zhenhua;  Lin, Li;  Wang, Yiyun;  Haghipour, Negar;  Wacker, Lukas;  Bao, Hongyan;  Dittmar, Thorston;  Simpson, Myrna J.;  Yang, Huan;  Crowther, Thomas W.;  Eglinton, Timothy, I;  He, Jin-Sheng;  Feng, Xiaojuan
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/27
deep soil  lignin decomposition  physical fraction  radiocarbon  soil organic carbon  warming  
Reorganization of surviving mammal communities after the end-Pleistocene megafaunal extinction 期刊论文
SCIENCE, 2019, 365 (6459) : 1305-+
作者:  Toth, Aniko B.;  Lyons, S. Kathleen;  Barr, W. Andrew;  Behrensmeyer, Anna K.;  Blois, Jessica L.;  Bobe, Rene;  Davis, Matt;  Du, Andrew;  Eronen, Jussi T.;  Faith, J. Tyler;  Fraser, Danielle;  Gotelli, Nicholas J.;  Graves, Gary R.;  Jukar, Advait M.;  Miller, Joshua H.;  Pineda-Munoz, Silvia;  Soul, Laura C.;  Villasenor, Amelia;  Alroy, John
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/27
Late Upper Paleolithic occupation at Cooper's Ferry, Idaho, USA, similar to 16,000 years ago 期刊论文
SCIENCE, 2019, 365 (6456) : 891-+
作者:  Davis, Loren G.;  Madsen, David B.;  Becerra-Valdivia, Lorena;  Higham, Thomas;  Sisson, David A.;  Skinner, Sarah M.;  Stueber, Daniel;  Nyers, Alexander J.;  Keen-Zebert, Amanda;  Neudorf, Christina;  Cheyney, Melissa;  Izuho, Masami;  Iizuka, Fumie;  Burns, Samuel R.;  Epps, Clinton W.;  Willis, Samuel C.;  Buvit, Ian
收藏  |  浏览/下载:18/0  |  提交时间:2019/11/27
Pervasive Arctic lead pollution suggests substantial growth in medieval silver production modulated by plague, climate, and conflict 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (30) : 14910-14915
作者:  McConnell, Joseph R.;  Chellman, Nathan J.;  Wilson, Andrew I.;  Stohl, Andreas;  Arienzo, Monica M.;  Eckhardt, Sabine;  Fritzsche, Diedrich;  Kipfstuhl, Sepp;  Opel, Thomas;  Place, Philip F.;  Steffensen, Jorgen Peder
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
ice core  lead pollution  Arctic  plague  Middle Ages  
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (5) : 1746-1764
作者:  Voigt, Carolina;  Marushchak, Maija E.;  Mastepanov, Mikhail;  Lamprecht, Richard E.;  Christensen, Torben R.;  Dorodnikov, Maxim;  Jackowicz-Korczynski, Marcin;  Lindgren, Amelie;  Lohila, Annalea;  Nykanen, Hannu;  Oinonen, Markku;  Oksanen, Timo;  Palonen, Vesa;  Treat, Claire C.;  Martikainen, Pertti J.;  Biasi, Christina
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/26
climate warming  CO2  greenhouse gas  mesocosm  methane oxidation  permafrost-carbon-feedback  
Anthropogenic strath terrace formation caused by reduced sediment retention 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (18) : 8734-8739
作者:  Schanz, Sarah A.;  Montgomery, David R.;  Collins, Brian D.
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
Anthropocene  river incision  terrace formation  Pacific Northwest  
Drainage enhances modern soil carbon contribution but reduces old soil carbon contribution to ecosystem respiration in tundra ecosystems 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (4) : 1315-1325
作者:  Kwon, Min Jung;  Natali, Susan M.;  Pries, Caitlin E. Hicks;  Schuur, Edward A. G.;  Steinhof, Axel;  Crummer, K. Grace;  Zimov, Nikita;  Zimov, Sergey A.;  Heimann, Martin;  Kolle, Olaf;  Goeckede, Mathias
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
carbon source partitioning  drying experiment  ecosystem respiration  permafrost  radiocarbon  soil hydrology  
Dating glacier ice of the last millennium by quantum technology 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (18) : 8781-8786
作者:  Feng, Zhongyi;  Bohleber, Pascal;  Ebser, Sven;  Ringena, Lisa;  Schmidt, Maximilian;  Kersting, Arne;  Hopkins, Philip;  Hoffmann, Helene;  Fischer, Andrea;  Aeschbach, Werner;  Oberthaler, Markus K.
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
glacier ice dating  argon-39  atom trap trace analysis  
Rivers across the Siberian Arctic unearth the patterns of carbon release from thawing permafrost 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (21) : 10280-10285
作者:  Wild, Birgit;  Andersson, August;  Broder, Lisa;  Vonk, Jorien;  Hugelius, Gustaf;  McClelland, James W.;  Song, Wenjun;  Raymond, Peter A.;  Gustafsson, Orjan
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
carbon cycle  climate change  radiocarbon  peat  leaching