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Increasing dependence of lowland populations on mountain water resources 期刊论文
NATURE SUSTAINABILITY, 2020
作者:  Viviroli, Daniel;  Kummu, Matti;  Meybeck, Michel;  Kallio, Marko;  Wada, Yoshihide
收藏  |  浏览/下载:14/0  |  提交时间:2020/07/09
Experimental evidence for lava-like mud flows under Martian surface conditions 期刊论文
NATURE GEOSCIENCE, 2020, 13 (6) : 403-+
作者:  Broz, Petr;  Kryza, Ondrej;  Wilson, Lionel;  Conway, Susan J.;  Hauber, Ernst;  Mazzini, Adriano;  Raack, Jan;  Balme, Matthew R.;  Sylvest, Matthew E.;  Patel, Manish R.
收藏  |  浏览/下载:9/0  |  提交时间:2020/05/20
Generation of chilling hours maps using surface observations and satellite data 期刊论文
ATMOSPHERIC RESEARCH, 2020, 236
作者:  Jimenez, Maria A.;  Grau, Antoni;  Cuxart, Joan
收藏  |  浏览/下载:6/0  |  提交时间:2020/07/02
Nocturnal cooling  Chilling hours  Weak-wind nights  2 m-temperature  Land surface temperature  Clear-sky  Surface heterogeneities  
Fast response of cold ice-rich permafrost in northeast Siberia to a warming climate 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Nitzbon, Jan;  Westermann, Sebastian;  Langer, Moritz;  Martin, Leo C. P.;  Strauss, Jens;  Laboor, Sebastian;  BOike, Julia
收藏  |  浏览/下载:12/0  |  提交时间:2020/05/13
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.


  
Groundwater Release on Early Mars: Utilizing Models and Proposed Evidence for Groundwater Release to Estimate the Required Climate and Subsurface Water Budget 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (8)
作者:  Palumbo, Ashley M.;  Head, James W.
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
Riparian Lowlands in Clay Till Landscapes: Part I-Heterogeneity of Flow Paths and Water Balances 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (4)
作者:  Petersen, R. J.;  Prinds, C.;  Iversen, B. V.;  Engesgaard, P.;  Jessen, S.;  Kjaergaard, C.
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
riparian lowland  infiltration  water balance  overland flow  peat  drain water  
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  
Recurring outburst floods from drained lakes: an emerging Arctic hazard 期刊论文
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT, 2020
作者:  Arp, Christopher D.;  Jones, Benjamin M.;  Hinkel, Kenneth M.;  Kane, Douglas L.;  Whitman, Matthew S.;  Kemnitz, Richard
收藏  |  浏览/下载:6/0  |  提交时间:2020/07/02
A thick crustal block revealed by reconstructions of early Mars highlands 期刊论文
NATURE GEOSCIENCE, 2020, 13 (2) : 105-+
作者:  Bouley, Sylvain;  Keane, James Tuttle;  Baratoux, David;  Langlais, Benoit;  Matsuyama, Isamu;  Costard, Francois;  Hewins, Roger;  Payre, Valerie;  Sautter, Violaine;  Sejourne, Antoine;  Vanderhaeghe, Olivier;  Zanda, Brigitte
收藏  |  浏览/下载:7/0  |  提交时间:2020/05/13