Search Results - "COHEN, WARREN B"

Detecting trends in forest disturbance and recovery using yearly Landsat time series: 1. LandTrendr — Temporal segmentation algorithms by Kennedy, Robert E., Yang, Zhiqiang, Cohen, Warren B.

“…We introduce and test LandTrendr (Landsat-based detection of Trends in Disturbance and Recovery), a new approach to extract spectral trajectories of land…”
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Detecting trends in forest disturbance and recovery using yearly Landsat time series: 2. TimeSync — Tools for calibration and validation by Cohen, Warren B., Yang, Zhiqiang, Kennedy, Robert

“…Availability of free, high quality Landsat data portends a new era in remote sensing change detection. Using dense (~ annual) Landsat time series (LTS), we can…”
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Implementation of the LandTrendr Algorithm on Google Earth Engine by Kennedy, Robert, Yang, Zhiqiang, Gorelick, Noel, Braaten, Justin, Cavalcante, Lucas, Cohen, Warren, Healey, Sean

“…The LandTrendr (LT) algorithm has been used widely for analysis of change in Landsat spectral time series data, but requires significant pre-processing, data…”
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The global Landsat archive: Status, consolidation, and direction by Wulder, Michael A., White, Joanne C., Loveland, Thomas R., Woodcock, Curtis E., Belward, Alan S., Cohen, Warren B., Fosnight, Eugene A., Shaw, Jerad, Masek, Jeffrey G., Roy, David P.

“…New and previously unimaginable Landsat applications have been fostered by a policy change in 2008 that made analysis-ready Landsat data free and open access…”
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Forest disturbance across the conterminous United States from 1985–2012: The emerging dominance of forest decline by Cohen, Warren B., Yang, Zhiqiang, Stehman, Stephen V., Schroeder, Todd A., Bell, David M., Masek, Jeffrey G., Huang, Chengquan, Meigs, Garrett W.

“…•We characterized annual rates of forest disturbance between 1985 and 2012.•Landsat time series were visually interpreted, with support of ancillary data.•A…”
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A Landsat time series approach to characterize bark beetle and defoliator impacts on tree mortality and surface fuels in conifer forests by Meigs, Garrett W., Kennedy, Robert E., Cohen, Warren B.

“…Insects are important forest disturbance agents, and mapping their effects on tree mortality and surface fuels represents a critical research challenge…”
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Automated cloud and cloud shadow identification in Landsat MSS imagery for temperate ecosystems by Braaten, Justin D., Cohen, Warren B., Yang, Zhiqiang

“…Automated cloud and cloud shadow identification algorithms designed for Landsat Thematic Mapper (TM) and Thematic Mapper Plus (ETM+) satellite images have…”
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Quality control and assessment of interpreter consistency of annual land cover reference data in an operational national monitoring program by Pengra, Bruce W., Stehman, Stephen V., Horton, Josephine A., Dockter, Daryn J., Schroeder, Todd A., Yang, Zhiqiang, Cohen, Warren B., Healey, Sean P., Loveland, Thomas R.

“…The U.S. Geological Survey Land Change Monitoring, Assessment and Projection (USGS LCMAP) initiative is working toward a comprehensive capability to…”
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Monitoring coniferous forest biomass change using a Landsat trajectory-based approach by Main-Knorn, Magdalena, Cohen, Warren B., Kennedy, Robert E., Grodzki, Wojciech, Pflugmacher, Dirk, Griffiths, Patrick, Hostert, Patrick

“…Forest biomass is a major store of carbon and thus plays an important role in the regional and global carbon cycle. Accurate forest carbon sequestration…”
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Bringing an ecological view of change to Landsat-based remote sensing by Kennedy, Robert E, Andréfouët, Serge, Cohen, Warren B, Gómez, Cristina, Griffiths, Patrick, Hais, Martin, Healey, Sean P, Helmer, Eileen H, Hostert, Patrick, Lyons, Mitchell B, Meigs, Garrett W, Pflugmacher, Dirk, Phinn, Stuart R, Powell, Scott L, Scarth, Peter, Sen, Susmita, Schroeder, Todd A, Schneider, Annemarie, Sonnenschein, Ruth, Vogelmann, James E, Wulder, Michael A, Zhu, Zhe

“…When characterizing the processes that shape ecosystems, ecologists increasingly use the unique perspective offered by repeat observations of remotely sensed…”
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Diversity of Algorithm and Spectral Band Inputs Improves Landsat Monitoring of Forest Disturbance by Cohen, Warren B., Healey, Sean P., Yang, Zhiqiang, Zhu, Zhe, Gorelick, Noel

“…Disturbance monitoring is an important application of the Landsat times series, both to monitor forest dynamics and to support wise forest management at a…”
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Statistical properties of hybrid estimators proposed for GEDI-NASA's global ecosystem dynamics investigation by Patterson, Paul L, Healey, Sean P, Ståhl, Göran, Saarela, Svetlana, Holm, Sören, Andersen, Hans-Erik, Dubayah, Ralph O, Duncanson, Laura, Hancock, Steven, Armston, John, Kellner, James R, Cohen, Warren B, Yang, Zhiqiang

“…NASA's Global Ecosystem Dynamics Investigation (GEDI) mission will collect waveform lidar data at a dense sample of ∼25 m footprints along ground tracks…”
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Landsat-based monitoring of annual wetland change in the Willamette Valley of Oregon, USA from 1972 to 2012 by Fickas, Kate C, Cohen, Warren B, Yang, Zhiqiang

“…In Oregon’s Willamette Valley, remaining wetlands are at high risk to loss and degradation from agricultural activity and urbanization. With an increased need…”
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Radiometric correction of multi-temporal Landsat data for characterization of early successional forest patterns in western Oregon by Schroeder, Todd A., Cohen, Warren B., Song, Conghe, Canty, Morton J., Yang, Zhiqiang

“…Detecting and characterizing continuous changes in early forest succession using multi-temporal satellite imagery requires atmospheric correction procedures…”
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Landsat's Role in Ecological Applications of Remote Sensing by COHEN, WARREN B, GOWARD, SAMUEL N

“…Remote sensing, geographic information systems, and modeling have combined to produce a virtual explosion of growth in ecological investigations and…”
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Landsat continuity: Issues and opportunities for land cover monitoring by Wulder, Michael A., White, Joanne C., Goward, Samuel N., Masek, Jeffrey G., Irons, James R., Herold, Martin, Cohen, Warren B., Loveland, Thomas R., Woodcock, Curtis E.

“…Initiated in 1972, the Landsat program has provided a continuous record of earth observation for 35 years. The assemblage of Landsat spatial, spectral, and…”
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An empirical, integrated forest biomass monitoring system by Kennedy, Robert E, Ohmann, Janet, Gregory, Matt, Roberts, Heather, Yang, Zhiqiang, Bell, David M, Kane, Van, Hughes, M Joseph, Cohen, Warren B, Powell, Scott, Neeti, Neeti, Larrue, Tara, Hooper, Sam, Kane, Jonathan, Miller, David L, Perkins, James, Braaten, Justin, Seidl, Rupert

“…The fate of live forest biomass is largely controlled by growth and disturbance processes, both natural and anthropogenic. Thus, biomass monitoring strategies…”
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Evaluation of MODIS NPP and GPP products across multiple biomes by Turner, David P., Ritts, William D., Cohen, Warren B., Gower, Stith T., Running, Steve W., Zhao, Maosheng, Costa, Marcos H., Kirschbaum, Al A., Ham, Jay M., Saleska, Scott R., Ahl, Douglas E.

“…Estimates of daily gross primary production (GPP) and annual net primary production (NPP) at the 1 km spatial resolution are now produced operationally for the…”
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Recent rates of forest harvest and conversion in North America by Masek, Jeffrey G., Cohen, Warren B., Leckie, Donald, Wulder, Michael A., Vargas, Rodrigo, de Jong, Ben, Healey, Sean, Law, Beverly, Birdsey, Richard, Houghton, R. A., Mildrexler, David, Goward, Samuel, Smith, W. Brad

“…Incorporating ecological disturbance into biogeochemical models is critical for estimating current and future carbon stocks and fluxes. In particular,…”
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Estimates of forest canopy height and aboveground biomass using ICESat by Lefsky, Michael A., Harding, David J., Keller, Michael, Cohen, Warren B., Carabajal, Claudia C., Del Bom Espirito-Santo, Fernando, Hunter, Maria O., de Oliveira Jr, Raimundo

“…Exchange of carbon between forests and the atmosphere is a vital component of the global carbon cycle. Satellite laser altimetry has a unique capability for…”
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