Western Geographic Science Center

Publications

Filter Total Items: 386
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Year Published: 2019

An evidence-based approach for supporting scientists communicating earthquake forecasts

No abstract available.

Hudson-Doyle, E.E.; McBride, Sara; Wein, Anne M.; Becker, Julia S.; Potter, Sally H.; Hudson-Doyle, E.E.

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Year Published: 2019

Population vulnerability to tsunami hazards informed by previous and projected disasters: A case study of American Samoa

Population vulnerability from tsunamis is a function of the number and location of individuals in hazard zones and their ability to reach safety before wave arrival. Previous tsunami disasters can provide insight on likely evacuation behavior, but post-disaster assessments have not been used extensively in evacuation modeling. We demonstrate the...

Wood, Nathan J.; Jones, Jeanne M.; Yamazaki, Yoshiki; Cheung, Kwok-Fai; Brown, Jacinta; Jones, Jamie; Abdollahian, Nina

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Year Published: 2019

Nominal 30-m cropland extent map of continental Africa by integrating pixel-based and object-based algorithms using Sentinel-2 and Landsat-8 Data on Google Earth Engine

A satellite-derived cropland extent map at high spatial resolution (30-m or better) is a must for food and water security analysis. Precise and accurate global cropland extent maps, indicating cropland and non-cropland areas, are starting points to develop higher-level products such as crop watering methods (irrigated or rainfed), cropping...

Xiong, Jun N.; Thenkabail, Prasad S.; James C. Tilton; Gumma, Murali Krishna; Teluguntla, Pardhasaradhi G.; Oliphant, Adam; Congalton, Russell G.; Yadav, Kamini; Gorelick, Noel

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Year Published: 2019

MODIS phenology-derived, multi-year distribution of conterminous U.S. crop types

Innovative, open, and rapid methods to map crop types over large areas are needed for long-term cropland monitoring. We developed two novel and automated decision tree classification approaches to map crop types across the conterminous United States (U.S.) using MODIS 250 m resolution data: 1) generalized, and 2) year-specific...

Massey, Richard; Sankey, T.T; Congalton, Russ; Yadav, Kamini; Thenkabail, Prasad; Ozdogan, Mutlu; Meador, Sanchez

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Year Published: 2018

Grasslands

Key findings:Total grassland carbon stocks in the conterminous United States, estimated to be about 7.4 petagrams of carbon (Pg C) in 2005, are projected to increase to about 8.2 Pg C by 2050. Although U.S. grasslands are expected to remain carbon sinks over this period, the uptake rate is projected to decline by about half. In the U.S. Great...

Cavallaro, Nancy; Shrestha, Gyami; Birdsey, Richard; Mayes, Melanie A.; Najjar, Raymond G.; Reed, Sasha C.; Romero-Lankao, Patricia; Zhu, Zhiliang; Pendall, Elise; Bachelet, Dominique; Conant, Richard T.; El Masri, Bassil; Flanagan, Lawrence B.; Knapp, Alan K.; Liu, Jinxun; Liu, Shuguang; Schaeffer, Sean M.

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Year Published: 2018

Accuracies achieved in classifying five leading world crop types and their growth stages using optimal Earth Observing-1 Hyperion hyperspectral narrowbands on Google Earth Engine

As the global population increases, we face increasing demand for food and nutrition. Remote sensing can help monitor food availability to assess global food security rapidly and accurately enough to inform decision-making. However, advances in remote sensing technology are still often limited to multispectral broadband sensors. Although these...

Aneece, Itiya; Thenkabail, Prasad S.

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Year Published: 2018

Spaceborne hyperspectral EO-1 hyperion data pre-processing: Methods, approaches, and algorithms

No abstract available.

Thenkabail, Prasad S.; Lyon, J.G.; Huete, Alfredo; Aneece, Itiya P.; Thenkabail, Prasad S.; Lyon, John G.; Huete, Alfredo; Slonecker, E. Terrence

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Year Published: 2018

Crop water productivity estimation with hyperspectral remote sensing

Crop water productivity (CWP) is the ratio of accumulated crop biomass or yield (Y) to the water utilized to produce it, which is typically estimated using transpiration (ETC). CWP is an important metric to test and monitor water-saving strategies in agroecosystems across the globe. Red and near-infrared broadbands have been used to estimate CWP,...

Marshall, Michael; Aneece, Itiya; Foley, Daniel; Xueliang, Cai; Biggs, Trent

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Year Published: 2018

Fifty-years of advances in hyperspectral remote sensing of agriculture and vegetation: Summary, insights, and highlights of Volume I: Hyperspectral processes, densors, and fata snalysis Vol II

This chapter provides a concise summary, insights, and highlights of the last 50 years of advances in hyperspectral remote sensing science pertaining to agriculture and vegetation. Topics covered in each of the 22 chapters of this Volume (Volume I: Hyperspectral Processes, Sensors, and Data Analysis) are discussed considering the strengths and...

Thenkabail, Prasad S.; Lyon, John G.; Huete, Alfredo

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Year Published: 2018

Status of tidal marsh mapping for blue carbon inventories

Remote-sensing-based maps of tidal marshes, both of their extents and carbon stocks, will play a key role in conducting greenhouse gas (GHG) inventories.The U.N. Environment Programme World Conservation Monitoring Centre has produced a new Global Distribution of Salt Marsh dataset that estimates global salt marsh area at 5.5 Mha.A Tier 1–2 GHG...

Byrd, Kristin B.; Mcowen, Chris; Weatherdon, Lauren; Holmquist, James; Crooks, Stephen