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Approximately 5,000 km. long network of ice roads/Rolligon trails is used to serve the oil and gas infrastructure facilities in the study area. State of Alaska regulations allow building of ice roads in areas with 6” to 9” of snow depth and with soil temperature of -5C at 30cm depth. The short-term impacts on the environment have been studied, and the impacts are reported to be more severe than seismic trails. Rolligon trails are built in the study area to transport freight to remote drilling sites, and for travel between Barrow and Atquasuk and Nuiqsut. These trails are built for special vehicles called Rolligons, equipped with large inflatable bags for wheels. Rolligons can carry large loads (approximately 40...
Within the study area, small and large stream ecosystems provide important habitat for aquatic insects, fish, and waterbirds. Small streams are generally slow moving and freeze completely during the winter. However, some small streams may provide overwinter habitat in the form of springs and deep pools. Small stream ecosystems support extensive spawning and rearing habitat for numerous fish species in the study area. Small streams also provide important habitat for aquatic invertebrates as well as important transportation and recreational uses for local residents. Large streams are typically less productive than smaller streams due to warmer temperatures in smaller tributaries. Consequently, smaller streams are...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - This file includes a downscaled projection of decadal cliomes for the decades 2010-2019, 2020-2029, and 2060-2069 at 2km spatial resolution. It represents the projection for the A2 emissions scenario and the spatial extent is the NOS REA study area. "Cliomes" can be considered to be assemblages of species and aggregated communities...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Construction or development, especially oil and gas operations near deep connected lakes could increase sedimentation to lakes. Run-off from unpaved roads can result in sedimentation to lakes increasing turbidity and impacting water quality for aquatic organisms and human use. Oil and gas activities near streams that are connected...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Growing season length was extracted to raptor concentration areas. Both summer temperature and growing season will increase by the 2060s. Growing season length (estimated days with mean temperatures above freezing) across the North Slope study area is currently (2010s) between 110 to 130 days, but by the 2060s will increase...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The results of our analysis indicate that within the current modeled distribution of raptor concentration areas, both summer temperature and growing season will increase by 2060. Summer temperatures increases will be significant, by as much as 1.3°C, with the warmest temperatures occurring in the Brooks Foothills. Warmer temperatures...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Mean March-April-May Precipitation was extracted to raptor concentration areas. An increase in the frequency and severity of erratic weather events has the potential to cause heavy rains that may negatively affect raptor productivity during incubation and brood rearing. Recently, researchers in the Canadian Arctic have linked...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Resource extraction and infrastructure development have caused the fragmentation of caribou habitat throughout Alaska. Patch sizes are likely to decrease with increased development. While a previous study in Prudhoe Bay found that caribou cows and calves did not avoid drilling areas, more recent studies have found that caribou...
Current landscape condition within the current total annual range of the Western Arctic, Teshekpuk, Central Arctic, and Porcupine caribou herds. 2040 high-development scenario landscape condition within the current total annual range of the Western Arctic, Teshekpuk, Central Arctic, and Porcupine caribou herds in the North Slope study area. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate...
Distribution of deep (greater than 1.6m depth) lakes. Distribution of shallow (less than 1.6m depth) lakes. Distribution of lakes and modeled increase in July temperature change from 2010 - 2060. Relationship between the current distribution of lakes and thermokarst potential. Current, medium scenario (2040), and high scenario (2040) future landscape condition (summarized at the 5th level HUC) within current shallow lakes habitat. Current, medium scenario (2040), and high scenario (2040) future landscape condition (summarized at the 5th level HUC) within current deep lakes habitat. Current, medium scenario (2040), and high scenario (2040) future landscape condition (summarized at the 5th level HUC) within current...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The overall status of the alpine dwarf shrub tundra CE was assessed by intersecting landscape condition with the alpine dwarf shrub distribution for the current condition and two development scenarios, medium and high. Landscape condition is a way to measure the impact of the human footprint on a landscape. The impact of the...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The overall status of tidal marsh was assessed by intersecting Landscape Condition with tidal marsh distribution for a current development scenario, medium (2040) development scenario, and high (2040) development scenario. Within the North Slope study area, future impacts are driven by changes in oil and gas infrastructure....
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The overall status of the alpine dwarf shrub tundra CE was assessed by intersecting landscape condition with the alpine dwarf shrub distribution for the current condition and two development scenarios, medium and high. Landscape condition is a way to measure the impact of the human footprint on a landscape. The impact of the...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - This file includes a downscaled projection of length of growing season (number of days, 0-365) for the decades 2010-2019, 2020-2029, and 2060-2069 at 771x771 meter spatial resolution. The file represents a decadal mean of annual means calculated from mean monthly data, using the A2 emissions scenario. The spatial extent is...
To estimate the potential of mineral resources in the Bureau of Land Management Central Yukon Planning Area using geographic information systems (GIS) analysis of muliple statewide datasets. The six mineral deposit models are: 1) REE-Th-Y-Nb deposits associated with peralkaline to carbonatitic intrusive rocks, 2) placer and paleoplacer Au, 3) PGE (-Co-Cr-Ni-Ti-V) deposits associated with mafic-to-ultramafic intrusive rocks, 4) carbonate-hosted Cu (-Co-Ag-Ge-Ga) deposits, 5) sandstone U (-V-Cu) deposits, and 6) Sn-W-Mo (-Ta-In-fluorspar) deposits in specialized granites. GIS data layers available for analysis include sediment and rock geochemistry, pan concentrate mineralogy and geochemistry, Alaska Resource Data...
The majority of the transportation infrastructure is related to oil industry activities. Other community transportation infrastructure – existing and planned – is small in comparison to the oil industry’s activities, as well as small in comparison to other U.S. communities. The transportation network in the region includes airstrips, few paved or gravel roads within communities, and a network of trails to subsistence use areas and those that connect communities. Most communities in the region are located along the northern coast of Alaska, with Nuiqsut, Prudhoe Bay, Atquasuk, and Noatak located along rivers. Travel to and from communities in the region is largely limited to air travel. While many rivers in the region...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Climate models indicate that warm season length (number of days between date of thaw and date of freeze) is projected to increase, on average, anywhere from 10 to 16 days across the North Slope study area, with the smallest increases seen in more southern and inland communities. A longer growing season may benefit caribou...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The majority of current raptor concentration distribution locations are in areas with very high (intact) landscape condition. Future projections of landscape condition suggest very little change in landscape condition in the vicinity of riparian corridors and areas occupied by these species. Although landscape condition appears...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The majority of current greater white-fronted goose habitat is in areas with very high (intact) landscape condition. However, very low condition is indicated in high density nesting areas around Prudhoe Bay and Nuiqsut. Future scenarios of landscape condition do not indicate any significant changes in both medium and high...
Some of the NOS rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Coastal Plain Wetland is covered with thermokarst (thaw) lakes and basins over much of the arctic coastal plain. It occurs along lake margins and in drained lake basins. Soils are saturated, and standing water is usually present during the growing season. A thick organic horizon typically occurs over silty deposits of marine,...
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