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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
Multiagency Initiative Begins Work on Critical Minerals and Geothermal Energy Research in Nevada 新闻
来源平台:US Geological Survey. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:5/0  |  提交时间:2020/09/22
Retrieval of microphysical dust particle properties from SALTRACE lidar observations: Case studies 期刊论文
Atmospheric Chemistry and Physics, 2020
作者:  Stefanos Samaras, Christine Böckmann, Moritz Haarig, Albert Ansmann, Adrian Walser, and Bernadett Weinzierl
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/06
Radiative effects of long-range-transported Saharan air layers as determined from airborne lidar measurements 期刊论文
Atmospheric Chemistry and Physics, 2020
作者:  Manuel Gutleben, Silke Groß, Martin Wirth, and Bernhard Mayer
收藏  |  浏览/下载:4/0  |  提交时间:2020/06/16
The vertical structure and spatial variability of lower-tropospheric water vapor and clouds in the trades 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (10) : 6129-6145
作者:  Naumann, Ann Kristin;  Kiemle, Christoph
收藏  |  浏览/下载:5/0  |  提交时间:2020/06/01
Small-scale structure of thermodynamic phase in Arctic mixed-phase clouds observed by airborne remote sensing during a cold air outbreak and a warm air advection event 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (9) : 5487-5511
作者:  Ruiz-Donoso, Elena;  Ehrlich, Andre;  Schaefer, Michael;  Jaekel, Evelyn;  Schemann, Vera;  Crewell, Susanne;  Mech, Mario;  Kulla, Birte Solveig;  Kliesch, Leif-Leonard;  Neuber, Roland;  Wendisch, Manfred
收藏  |  浏览/下载:10/0  |  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.


  
Investigating emission sources and transport of aerosols in Siberia using airborne and spaceborne LIDAR measurements 期刊论文
Atmospheric Chemistry and Physics, 2020
作者:  Antonin Zabukovec, Gerard Ancellet, Iwan E. Penner, Mikhail Arshinov, Valery Kozlov, Jacques Pelon, Jean-Daniel Paris, Grigory Kokhanenko, Yuri S. Balin, Dmitry Chernov, and Boris D. Belan
收藏  |  浏览/下载:7/0  |  提交时间:2020/05/13
3D models of mountain lakes with a portable sonar and airborne laser 新闻
来源平台:EurekAlert! - Earth Science. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:2/0  |  提交时间:2020/04/21
Models transport Saharan dust too low in the atmosphere compared to observations 期刊论文
Atmospheric Chemistry and Physics, 2020
作者:  Debbie O'Sullivan, Franco Marenco, Claire L. Ryder, Yaswant Pradhan, Zak Kipling, Ben Johnson, Angela Benedetti, Melissa Brooks, Matthew McGill, John Yorks, and Patrick Selmer
收藏  |  浏览/下载:6/0  |  提交时间:2020/05/13