David M Sumner, PhD
Center Director at USGS Caribbean-Florida Water Science Center
Science and Products
Variability of albedo and utility of the MODIS albedo product in forested wetlands Variability of albedo and utility of the MODIS albedo product in forested wetlands
Albedo was monitored over a two-year period (beginning April 2008) at three forested wetland sites in Florida, USA using up- and down-ward facing pyranometers. Water level, above and below land surface, is the primary control on the temporal variability of daily albedo. Relatively low reflectivity of water accounts for the observed reductions in albedo with increased inundation of the...
Authors
David M. Sumner, Qinglong Wu, Chandra S. Pathak
Calibration of GOES-derived solar radiation data using a distributed network of surface measurements in Florida, USA Calibration of GOES-derived solar radiation data using a distributed network of surface measurements in Florida, USA
Solar radiation data are critically important for the estimation of evapotranspiration. Analysis of visible-channel data derived from Geostationary Operational Environmental Satellites (GOES) using radiative transfer modeling has been used to produce spatially- and temporally-distributed datasets of solar radiation. An extensive network of (pyranometer) surface measurements of solar...
Authors
David M. Sumner, Chandra S. Pathak, John R. Mecikalski, Simon J. Paech, Qinglong Wu, Taiye Sangoyomi
Estimating changes in heat energy stored within a column of wetland surface water and factors controlling their importance in the surface energy budget Estimating changes in heat energy stored within a column of wetland surface water and factors controlling their importance in the surface energy budget
Changes in heat energy stored within a column of wetland surface water can be a considerable component of the surface energy budget, an attribute that is demonstrated by comparing changes in stored heat energy to net radiation at seven sites in the wetland areas of southern Florida, including the Everglades. The magnitude of changes in stored heat energy approached the magnitude of net...
Authors
W. Barclay Shoemaker, David M. Sumner, Adrian Castillo
Water-level maps of the alluvial aquifer, Northwestern Mississippi, April 1983 Water-level maps of the alluvial aquifer, Northwestern Mississippi, April 1983
Water levels were measured in about 500 wells in the Mississippi River valley alluvial aquifer in northwestern Mississippi during April 1983. Ground-water levels have declined in some areas in recent years as a result of heavy irrigation pumpage from this aquifer. Near the areas of principal recharge, along the major rivers, and near the Bluff Hills, ground-water levels appear to be...
Authors
David M. Sumner
Science and Products
Variability of albedo and utility of the MODIS albedo product in forested wetlands Variability of albedo and utility of the MODIS albedo product in forested wetlands
Albedo was monitored over a two-year period (beginning April 2008) at three forested wetland sites in Florida, USA using up- and down-ward facing pyranometers. Water level, above and below land surface, is the primary control on the temporal variability of daily albedo. Relatively low reflectivity of water accounts for the observed reductions in albedo with increased inundation of the...
Authors
David M. Sumner, Qinglong Wu, Chandra S. Pathak
Calibration of GOES-derived solar radiation data using a distributed network of surface measurements in Florida, USA Calibration of GOES-derived solar radiation data using a distributed network of surface measurements in Florida, USA
Solar radiation data are critically important for the estimation of evapotranspiration. Analysis of visible-channel data derived from Geostationary Operational Environmental Satellites (GOES) using radiative transfer modeling has been used to produce spatially- and temporally-distributed datasets of solar radiation. An extensive network of (pyranometer) surface measurements of solar...
Authors
David M. Sumner, Chandra S. Pathak, John R. Mecikalski, Simon J. Paech, Qinglong Wu, Taiye Sangoyomi
Estimating changes in heat energy stored within a column of wetland surface water and factors controlling their importance in the surface energy budget Estimating changes in heat energy stored within a column of wetland surface water and factors controlling their importance in the surface energy budget
Changes in heat energy stored within a column of wetland surface water can be a considerable component of the surface energy budget, an attribute that is demonstrated by comparing changes in stored heat energy to net radiation at seven sites in the wetland areas of southern Florida, including the Everglades. The magnitude of changes in stored heat energy approached the magnitude of net...
Authors
W. Barclay Shoemaker, David M. Sumner, Adrian Castillo
Water-level maps of the alluvial aquifer, Northwestern Mississippi, April 1983 Water-level maps of the alluvial aquifer, Northwestern Mississippi, April 1983
Water levels were measured in about 500 wells in the Mississippi River valley alluvial aquifer in northwestern Mississippi during April 1983. Ground-water levels have declined in some areas in recent years as a result of heavy irrigation pumpage from this aquifer. Near the areas of principal recharge, along the major rivers, and near the Bluff Hills, ground-water levels appear to be...
Authors
David M. Sumner