Search Results - "Gillespie, Alan R"

Multiple dust sources in the Sahara Desert: The importance of sand dunes by Crouvi, Onn, Schepanski, Kerstin, Amit, Rivka, Gillespie, Alan R., Enzel, Yehouda

“…We determine the current sources of dust in the Sahara Desert using quantitative correlation between the number of days with dust storms (NDS), derived from…”
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Outburst floods of the Maly Yenisei. Part I by Batbaatar, Jigjidsurengiin, Gillespie, Alan R.

“…The Yenisei, the largest river flowing to the Arctic Ocean, repeatedly hosted cataclysmic floods during the Pleistocene. The largest of the known floods likely…”
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A New Approach to Change Vector Analysis Using Distance and Similarity Measures by Carvalho Júnior, Osmar A., Guimarães, Renato F., Gillespie, Alan R., Silva, Nilton C., Gomes, Roberto A. T.

“…The need to monitor the Earth’s surface over a range of spatial and temporal scales is fundamental in ecosystems planning and management. Change-Vector…”
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Significance of primary hilltop loess in reconstructing dust chronology, accretion rates, and sources: An example from the Negev Desert, Israel by Crouvi, Onn, Amit, Rivka, Porat, Naomi, Gillespie, Alan R., McDonald, Eric V., Enzel, Yehouda

“…Although high‐latitude loess sequences have been studied extensively for reconstructing past climates, loess in desert margins has been mostly overlooked…”
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Late Quaternary glaciation in the Kyrgyz Tien Shan by Koppes, Michéle, Gillespie, Alan R., Burke, Raymond M., Thompson, Stephen C., Stone, John

“…The Tien Shan of Kyrgyzstan contains multiple moraines and drift from late Quaternary glaciations. The spatial/temporal distribution of the glaciers inferred…”
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Karst Depression Detection Using ASTER, ALOS/PRISM and SRTM-Derived Digital Elevation Models in the Bambuí Group, Brazil by de Carvalho, Osmar Abilio, Guimaraes, Renato Fontes, Montgomery, David R, Gillespie, Alan R, Gomes, Roberto Arnaldo Trancoso, de Souza Martins, eder, Silva, Nilton Correia

“…Remote sensing has been used in karst studies to identify limestone terrain, describe exokarst features, analyze karst depressions, and detect geological…”
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Radiometric Normalization of Temporal Images Combining Automatic Detection of Pseudo-Invariant Features from the Distance and Similarity Spectral Measures, Density Scatterplot Analysis, and Robust Regression by De Carvalho, Osmar, Guimarães, Renato, Silva, Nilton, Gillespie, Alan, Gomes, Roberto, Silva, Cristiano, De Carvalho, Ana

“…Radiometric precision is difficult to maintain in orbital images due to several factors (atmospheric conditions, Earth-sun distance, detector calibration,…”
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Effect of obliteration on crater-count chronologies for Martian surfaces by Smith, Matthew R., Gillespie, Alan R., Montgomery, David R.

“…The density of impact craters calibrated against lunar data is currently the only quantitative measure of surface age for terrestrial planetary surfaces…”
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Mapping sub-pixel surface roughness on Mars using high-resolution satellite image data by Mushkin, Amit, Gillespie, Alan R.

“…The ratio between co‐registered pixels in stereo or repeat image pairs is used to constrain the deviation of the Martian surface from Lambertian reflection due…”
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Active sand seas and the formation of desert loess by Crouvi, Onn, Amit, Rivka, Enzel, Yehouda, Gillespie, Alan R.

“…Loess is a widespread eolian deposit dominated by coarse silt and very fine sand quartz grains (20–80 μm) that serve as an important archive of information on…”
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Residual errors in ASTER temperature and emissivity standard products AST08 and AST05 by Gillespie, Alan R., Abbott, Elsa A., Gilson, Laura, Hulley, Glynn, Jiménez-Muñoz, Juan-C., Sobrino, José A.

“…Land surface temperature and emissivity are independent variables, and the thermal-infrared spectral radiance measured in remote sensing is dependent on both…”
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Outburst floods of the Maly Yenisei. Part II - new age constraints from Darhad basin by Batbaatar, Jigjidsurengiin, Gillespie, Alan R.

“…Some of the largest cataclysmic floods of the Quaternary followed multiple breaches of glaciers damming the headwaters of the Maly Yenisei river in southern…”
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Field validation of the ASTER Temperature–Emissivity Separation algorithm by Sabol, Donald E., Gillespie, Alan R., Abbott, Elsa, Yamada, Gail

“…The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) has operated since 19 December 1999 from NASA's Terra Earth-orbiting,…”
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Assessing satellite-based and aircraft-based thermal infrared remote sensing for monitoring Pacific Northwest river temperature by Cherkauer, K.A, Burges, S.J, Handcock, R.N, Kay, J.E, Kampf, S.K, Gillespie, A.R

“…One central issue affecting the health of native fish species in the Pacific Northwest is water temperature. In situ observation methods monitor point…”
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Toward the Detection of Permafrost Using Land-Surface Temperature Mapping by Batbaatar, Jigjidsurengiin, Gillespie, Alan R., Sletten, Ronald S., Mushkin, Amit, Amit, Rivka, Trombotto Liaudat, Darío, Liu, Lu, Petrie, Gregg

“…Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing carbon from soils, and altering seasonal water availability…”
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Validation of ASTER Emissivity Retrieval Using the Mako Airborne TIR Imaging Spectrometer at the Algodones Dune Field in Southern California, USA by Mushkin, Amit, Gillespie, Alan R., Abbott, Elsa A., Batbaatar, Jigjidsurengiin, Hulley, Glynn, Tan, Howard, Tratt, David M., N. Buckland, Kerry

“…Validation of emissivity (ε) retrievals from spaceborne thermal infrared (TIR) sensors typically requires spatial extrapolations over several orders of…”
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Spectral constraints on the composition of low-albedo slope streaks in the Olympus Mons Aureole by Mushkin, Amit, Gillespie, Alan R., Montgomery, David R., Schreiber, B. Charlotte, Arvidson, Ray E.

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Performance of a thermal-infrared radiosity and heat-diffusion model for estimating sub-pixel radiant temperatures over the course of a day by Danilina, Iryna, Gillespie, Alan R., Balick, Lee K., Mushkin, Amit, O'Neal, Michael A.

“…Temperature/emissivity estimation from remotely measured radiances generally assumes that scene elements represented by pixels in fact have a single emissivity…”
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Thermal-infrared imaging of weathering and alteration changes on the surfaces of basalt flows, Hawai‘i, USA by Abbott, Elsa A, Gillespie, Alan R, Kahle, Anne B

“…Basaltic pahoehoe lavas weather on time scales of decades to millennia and are chemically altered by volcanic heat and gases on time scales of days to decades…”
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Interpretation and topographic compensation of conifer canopy self-shadowing by Kane, Van R., Gillespie, Alan R., McGaughey, Robert, Lutz, James A., Ceder, Kevin, Franklin, Jerry F.

“…The self-shadowing of conifer canopies results from the size and arrangement of trees within a stand and is a first-order term controlling radiance from…”
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