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Discovery of 66 New Roman Army Sites Shows More Clues About One of the Empire 新闻
来源平台:Science Daily. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2020/12/23
Stanford engineers combine light and sound to see underwater 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2020/12/02
Engineers Combine Light and Sound to See Underwater 新闻
来源平台:Science Daily. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:9/0  |  提交时间:2020/12/02
Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults from Differencing Repeat Airborne Lidar 期刊论文
Geophysical Research Letters, 2020
作者:  Chelsea Phipps Scott;  Stephen B. DeLong;  J. Ramó;  n Arrowsmith
收藏  |  浏览/下载:2/0  |  提交时间:2020/11/09
Sensitivities in Satellite Lidar‐derived Estimates of Daytime Top‐of‐the‐Atmosphere Optically‐Thin Cirrus Cloud Radiative Forcing: A Case Study 期刊论文
Geophysical Research Letters, 2020
作者:  Erica K. Dolinar;  James R. Campbell;  Simone Lolli;  Scott C. Ozog;  John E. Yorks;  Christopher Camacho;  Yu Gu;  Anthony Bucholtz;  Matthew J. McGill
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/14
Ozone Transport to the San Joaquin Valley 新闻
来源平台:American Meteorological Society. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:8/0  |  提交时间:2020/06/24
Ozone Production in the Soberanes Smoke Haze: Implications for Air Quality in the San Joaquin Valley During the California Baseline Ozone Transport Study 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (11)
作者:  Langford, Andrew O.;  Alvarez, Raul J., II;  Brioude, J.;  Caputi, Dani;  Conley, Stephen A.;  Evan, S.;  Faloona, Ian C.;  Iraci, Laura T.;  Kirgis, Guillaume;  Marrero, Josette E.;  Ryoo, Ju-Mee;  Senff, Christoph J.;  Yates, Emma L.
收藏  |  浏览/下载:14/0  |  提交时间:2020/08/18
ozone  wildfire  lidar  aircraft  California  San Joaquin Valley  
Intercomparison of wind observations from the European Space Agency’s Aeolus satellite mission and the ALADIN Airborne Demonstrator 科技报告
来源:European Geosciences Union. 出版年: 2020
作者:  admin
收藏  |  浏览/下载:5/0  |  提交时间:2020/06/16
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.


  
Aboveground carbon emissions from gold mining in the Peruvian Amazon 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (1)
作者:  Csillik, Ovidiu;  Asner, Gregory P.
收藏  |  浏览/下载:11/0  |  提交时间:2020/07/02
deep learning  forest degradation  gold mining  Madre de Dios  Planet Dove  REDD plus  tropical forest