Thomas Loveland (Former Employee)
Science and Products
Filter Total Items: 143
Mapping an invasive plant, Phragmites australis, in coastal wetlands using the EO-1 Hyperion hyperspectral sensor Mapping an invasive plant, Phragmites australis, in coastal wetlands using the EO-1 Hyperion hyperspectral sensor
Mapping tools are needed to document the location and extent of Phragmites australis, a tall grass that invades coastal marshes throughout North America, displacing native plant species and degrading wetland habitat. Mapping Phragmites is particularly challenging in the freshwater Great Lakes coastal wetlands due to dynamic lake levels and vegetation diversity. We tested the...
Authors
Bruce Pengra, C.A. Johnston, Thomas R. Loveland
Comparative analysis of GPP products estimated from an empirical model and MODIS Comparative analysis of GPP products estimated from an empirical model and MODIS
Carbon-cycle models have uncertainties associated with data inputs, parameters, and model algorithms. The prerequisite for an applicable model is that it should perform at an acceptable level of accuracy and uncertainties should be documented. In this study, we validated the gross primary productivity (GPP) data from a piecewise regression (PWR) model and the MODIS GPP model at five...
Authors
Li Zhang, Bruce K. Wylie, Thomas Loveland, Lei Ji
Upscaling terrestrial carbon dynamics from sites to regions with uncertainty measures—The GEMS experience Upscaling terrestrial carbon dynamics from sites to regions with uncertainty measures—The GEMS experience
No abstract available.
Authors
Shuguang Liu, Z. Li, Jinxun Liu, Thomas Loveland, M. Chen, Larry L. Tieszen
Land use/land cover change effects on temperature trends at U.S. Climate Normals stations Land use/land cover change effects on temperature trends at U.S. Climate Normals stations
Alterations in land use/land cover (LULC) in areas near meteorological observation stations can influence the measurement of climatological variables such as temperature. Urbanization near climate stations has been the focus of considerable research attention, however conversions between non-urban LULC classes may also have an impact. In this study, trends of minimum, maximum, and...
Authors
R. C. Hale, K. P. Gallo, T.W. Owen, Thomas R. Loveland
United States of America United States of America
No abstract available.
Authors
D.E. Napton, Thomas R. Loveland
Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000 Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000
Estimating dynamic terrestrial ecosystem carbon (C) sources and sinks over large areas is difficult. The scaling of C sources and sinks from the field level to the regional level has been challenging due to the variations of climate, soil, vegetation, and disturbances. As part of an effort to estimate the spatial, temporal, and sectional dimensions of the United States C sources and...
Authors
J. Liu, S. Liu, Thomas R. Loveland
Spatial-temporal carbon sequestration under land use and land cover change Spatial-temporal carbon sequestration under land use and land cover change
No abstract available.
Authors
Shuguang Liu, Jinxun Liu, Thomas Loveland
Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015 Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015
This report presents a science strategy for the geographic research of the U.S. Geological Survey (USGS) for the years 2005-2015. The common thread running through the vision, mission, and science goals presented in the plan is that USGS geographers will provide national leadership to understand coupled human-environmental systems in the face of land change and will deliver pertinent...
Authors
Gerard McMahon, Susan P. Benjamin, Keith Clarke, John E. Findley, Robert N. Fisher, William L. Graf, Linda C. Gundersen, John Jones, Thomas R. Loveland, Keven S. Roth, E. Lynn Usery, Nathan J. Wood
Perspectives on the use of land-cover data for ecological investigations Perspectives on the use of land-cover data for ecological investigations
No abstract available.
Authors
Thomas R. Loveland, Alisa L. Gallant, James E. Vogelmann
Rural land-use trends in the conterminous United States, 1950-2000 Rural land-use trends in the conterminous United States, 1950-2000
In order to understand the magnitude, direction, and geographic distribution of land-use changes, we evaluated land-use trends in U.S. counties during the latter half of the 20th century. Our paper synthesizes the dominant spatial and temporal trends in population, agriculture, and urbanized land uses, using a variety of data sources and an ecoregion classification as a frame of...
Authors
Daniel G. Brown, Kenneth M. Johnson, Thomas R. Loveland, David M. Theobald
Soil organic carbon dynamics as related to land use history in the northwestern Great Plains Soil organic carbon dynamics as related to land use history in the northwestern Great Plains
Strategies for mitigating the global greenhouse effect must account for soil organic carbon (SOC) dynamics at both spatial and temporal scales, which is usually challenging owing to limitations in data and approach. This study was conducted to characterize the SOC dynamics associated with land use change history in the northwestern Great Plains ecoregion. A sampling framework (40 sample...
Authors
Z. Tan, S. Liu, C.A. Johnston, Thomas R. Loveland, L.L. Tieszen, J. Liu, R. Kurtz
An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover
Statistical sampling offers a cost-effective, practical alternative to complete-coverage mapping for the objective of estimating gross change in land cover over large areas. Because land cover change is typically rare, the sampling strategy must take advantage of design and analysis tools that enhance precision. Using two populations of land cover change in the eastern United States, we
Authors
S.V. Stehman, Terry L. Sohl, Thomas R. Loveland
Science and Products
Filter Total Items: 143
Mapping an invasive plant, Phragmites australis, in coastal wetlands using the EO-1 Hyperion hyperspectral sensor Mapping an invasive plant, Phragmites australis, in coastal wetlands using the EO-1 Hyperion hyperspectral sensor
Mapping tools are needed to document the location and extent of Phragmites australis, a tall grass that invades coastal marshes throughout North America, displacing native plant species and degrading wetland habitat. Mapping Phragmites is particularly challenging in the freshwater Great Lakes coastal wetlands due to dynamic lake levels and vegetation diversity. We tested the...
Authors
Bruce Pengra, C.A. Johnston, Thomas R. Loveland
Comparative analysis of GPP products estimated from an empirical model and MODIS Comparative analysis of GPP products estimated from an empirical model and MODIS
Carbon-cycle models have uncertainties associated with data inputs, parameters, and model algorithms. The prerequisite for an applicable model is that it should perform at an acceptable level of accuracy and uncertainties should be documented. In this study, we validated the gross primary productivity (GPP) data from a piecewise regression (PWR) model and the MODIS GPP model at five...
Authors
Li Zhang, Bruce K. Wylie, Thomas Loveland, Lei Ji
Upscaling terrestrial carbon dynamics from sites to regions with uncertainty measures—The GEMS experience Upscaling terrestrial carbon dynamics from sites to regions with uncertainty measures—The GEMS experience
No abstract available.
Authors
Shuguang Liu, Z. Li, Jinxun Liu, Thomas Loveland, M. Chen, Larry L. Tieszen
Land use/land cover change effects on temperature trends at U.S. Climate Normals stations Land use/land cover change effects on temperature trends at U.S. Climate Normals stations
Alterations in land use/land cover (LULC) in areas near meteorological observation stations can influence the measurement of climatological variables such as temperature. Urbanization near climate stations has been the focus of considerable research attention, however conversions between non-urban LULC classes may also have an impact. In this study, trends of minimum, maximum, and...
Authors
R. C. Hale, K. P. Gallo, T.W. Owen, Thomas R. Loveland
United States of America United States of America
No abstract available.
Authors
D.E. Napton, Thomas R. Loveland
Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000 Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000
Estimating dynamic terrestrial ecosystem carbon (C) sources and sinks over large areas is difficult. The scaling of C sources and sinks from the field level to the regional level has been challenging due to the variations of climate, soil, vegetation, and disturbances. As part of an effort to estimate the spatial, temporal, and sectional dimensions of the United States C sources and...
Authors
J. Liu, S. Liu, Thomas R. Loveland
Spatial-temporal carbon sequestration under land use and land cover change Spatial-temporal carbon sequestration under land use and land cover change
No abstract available.
Authors
Shuguang Liu, Jinxun Liu, Thomas Loveland
Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015 Geography for a Changing World - A science strategy for the geographic research of the U.S. Geological Survey, 2005-2015
This report presents a science strategy for the geographic research of the U.S. Geological Survey (USGS) for the years 2005-2015. The common thread running through the vision, mission, and science goals presented in the plan is that USGS geographers will provide national leadership to understand coupled human-environmental systems in the face of land change and will deliver pertinent...
Authors
Gerard McMahon, Susan P. Benjamin, Keith Clarke, John E. Findley, Robert N. Fisher, William L. Graf, Linda C. Gundersen, John Jones, Thomas R. Loveland, Keven S. Roth, E. Lynn Usery, Nathan J. Wood
Perspectives on the use of land-cover data for ecological investigations Perspectives on the use of land-cover data for ecological investigations
No abstract available.
Authors
Thomas R. Loveland, Alisa L. Gallant, James E. Vogelmann
Rural land-use trends in the conterminous United States, 1950-2000 Rural land-use trends in the conterminous United States, 1950-2000
In order to understand the magnitude, direction, and geographic distribution of land-use changes, we evaluated land-use trends in U.S. counties during the latter half of the 20th century. Our paper synthesizes the dominant spatial and temporal trends in population, agriculture, and urbanized land uses, using a variety of data sources and an ecoregion classification as a frame of...
Authors
Daniel G. Brown, Kenneth M. Johnson, Thomas R. Loveland, David M. Theobald
Soil organic carbon dynamics as related to land use history in the northwestern Great Plains Soil organic carbon dynamics as related to land use history in the northwestern Great Plains
Strategies for mitigating the global greenhouse effect must account for soil organic carbon (SOC) dynamics at both spatial and temporal scales, which is usually challenging owing to limitations in data and approach. This study was conducted to characterize the SOC dynamics associated with land use change history in the northwestern Great Plains ecoregion. A sampling framework (40 sample...
Authors
Z. Tan, S. Liu, C.A. Johnston, Thomas R. Loveland, L.L. Tieszen, J. Liu, R. Kurtz
An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover An evaluation of sampling strategies to improve precision of estimates of gross change in land use and land cover
Statistical sampling offers a cost-effective, practical alternative to complete-coverage mapping for the objective of estimating gross change in land cover over large areas. Because land cover change is typically rare, the sampling strategy must take advantage of design and analysis tools that enhance precision. Using two populations of land cover change in the eastern United States, we
Authors
S.V. Stehman, Terry L. Sohl, Thomas R. Loveland