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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  
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  
Integration of WorldView-2 and airborne laser scanning data to classify defoliation levels in Quercus ilex L. Dehesas affected by root rot mortality: Management implications 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 451
作者:  Navarro-Cerrillo, Rafael M.;  Varo-Martinez, Ma Angeles;  Acosta, Cristina;  Palacios Rodriguez, Guillermo;  Sanchez-Cuesta, Rafael;  Gomez, Francisco J. Ruiz
收藏  |  浏览/下载:15/0  |  提交时间:2019/11/27
Dehesas forest type  Holm oak decline  Defoliation  Predictor remote sensing datasets  Segmentation  Random forest  
ICESat-2 Surface Height and Sea Ice Freeboard Assessed With ATM Lidar Acquisitions From Operation IceBridge 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Kwok, R.;  Kacimi, S.;  Markus, T.;  Kurtz, N. T.;  Studinger, M.;  Sonntag, J. G.;  Manizade, S. S.;  Boisvert, L. N.;  Harbeck, J. P.
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
ICESat-2  validation  assessment  surface height  freeboard  sea ice  
On promoting the use of lidar systems in forest ecosystem research 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 450
作者:  Beland, Martin;  Parker, Geoffrey;  Sparrow, Ben;  Harding, David;  Chasmer, Laura;  Phinn, Stuart;  Antonarakis, Alexander;  Strahler, Alan
收藏  |  浏览/下载:14/0  |  提交时间:2019/11/27
Lidar systems  Lidar products  Forest structure  
Exploring the relation between remotely sensed vertical canopy structure and tree species diversity in Gabon 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (9)
作者:  Marselis, Suzanne Marielle;  Tang, Hao;  Armston, John;  Abernethy, Katharine;  Alonso, Alfonso;  Barbier, Nicolas;  Bissiengou, Pulcherie;  Jeffery, Kathryn;  Kenfack, David;  Labriere, Nicolas;  Lee, Seung-Kuk;  Lewis, Simon L.;  Memiaghe, Herve;  Poulsen, John R.;  White, Lee;  Dubayah, Ralph
收藏  |  浏览/下载:15/0  |  提交时间:2019/11/27
biodiversity  radar  lidar  LVIS  ICESat  GEDI  TanDEM-X  
High-resolution mapping of aboveground biomass for forest carbon monitoring system in the Tri-State region of Maryland, Pennsylvania and Delaware, USA 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (9)
作者:  Huang, Wenli;  39;Neil-Dunne, Jarlath
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
forest aboveground biomass  carbon monitoring system  lidar  forest inventory analysis  Maryland  Delaware  Pennsylvania  
Pre-stratified modelling plus residuals kriging reduces the uncertainty of aboveground biomass estimation and spatial distribution in heterogeneous savannas and forest environments 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 445: 96-109
作者:  Silveira, Eduarda M. O.;  Espirito Santo, Fernando D.;  Wulder, Michael A.;  Acerbi Junior, Fausto W.;  Carvalho, Monica C.;  Mello, Carlos R.;  Mello, Jose M.;  Shimabukuro, Yosio E.;  Nunes Santos Terra, Marcela Castro;  Carvalho, Luis Marcelo T.;  Scolforo, Jose R. S.
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
AGB  Random forests  Brazilian biomes  Climate  Seasonality  
An overview of ABoVE airborne campaign data acquisitions and science opportunities 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (8)
作者:  Miller, C. E.;  Griffith, P. C.;  Goetz, S. J.;  Hoy, E. E.;  Pinto, N.;  McCubbin, I. B.;  Thorpe, A. K.;  Hofton, M.;  Hodkinson, D.;  Hansen, C.;  Woods, J.;  Larson, E.;  Kasischke, E. S.;  Margolis, H. A.
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
ABoVE  arctic  ecosystems  boreal forest  tundra  permafrost  airborne remote sensing