Skip to main content
Advanced Search

Filters: Tags: {"type":"Theme"} (X)

Folders: ROOT > ScienceBase Catalog > Alaska Science Center (ASC) > _Water Ice & Landscapes ( Show direct descendants )

23 results (158ms)   

Location

Folder
ROOT
_ScienceBase Catalog
__Alaska Science Center (ASC)
____Water Ice & Landscapes
View Results as: JSON ATOM CSV
thumbnail
This is a child item of the USGS Data Release: https://doi.org/10.5066/P9KFIRWQ This dataset contains aerial oblique digital photos taken of the arctic landscape during low altitude photo survey transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk Valley National Park, and Noatak National Preserve) and the U.S. Fish and Wildlife Service's Selawik National Wildlife Refuge. Version History: First release: May 2014 Revised:August 2021 (ver. 1.01) Revised:August 2023 (ver. 1.1)
Categories: Data, Data Release - Revised; Tags: Aerial Photography, Alaska, Arctic Network, Bering Land Bridge National Preserve, Biota, All tags...
thumbnail
This dataset contains observations of the distribution of end-of-summer snow cover on approximately 3000 glaciers across Alaska and Northwest Canada. The data are provided as: (1) GeoTIFF rasters indicating the spatial extent of end-of-summer snow cover on each glacier's surface in each year (one raster per glacier per year), and (2) yearly tables with the equilibrium line altitude and the accumulation area ratio of the glaciers derived from the snow cover extent geotiffs. Snow cover was identified in Sentinel-2 imagery using a random forest algorithm trained with a manually-created validation dataset. A series of post-processing steps were used to infill missing data from terrain shadowing and cloud cover, and...
thumbnail
This dataset contains drainage basin boundaries for 253 U.S. Geological Survey (USGS) streamgages in Alaska that had at least 5 years of daily streamflow through September 30, 2017, three of which were delineated for alternate basin conditions. This compilation includes selected boundaries produced in 2014 (https://doi.org/10.5066/P143KNEJ). Additional basin boundaries were delineated from the streamgage location to the nearest USGS Watershed Boundary Dataset (WBD) HUC boundary and along HUC boundaries from that intersection to the basin headwaters. Streamgages selected for drainage basin delineation included streamgages in Alaska that met selection criteria for a statewide study of seasonal flow regimes (Curran...
thumbnail
This data package documents selected special conditions affecting the magnitude of peak flows at streamgages in Alaska. The data consist of a table of special conditions for selected peak flows and a table of data sources. This dataset resolves ambiguity introduced by historical variations in USGS National Water Information System (NWIS; https://doi.org/10.5066/F7P55KJN) peak-flow code assignment practices or inherent in defining multiple possible conditions for a single code. For peak flows assigned a code 3 or 9 in the NWIS peak-flow database, the special conditions forming the basis for code assignment were (1) snowmelt or (2) a sudden release of water. Sudden releases of water included glacier dammed lake outburst,...
thumbnail
This is a child item of the USGS Data Release: https://doi.org/10.5066/P9KFIRWQ This dataset contains aerial nadir digital photos and ecotype classification data determined from the photos. Aerial nadir photos were taken at 5 second intervals of the arctic landscape during low altitude photo survey transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk Valley National Park, and Noatak National Preserve) and the U.S. Fish and Wildlife Service's Selawik National Wildlife Refuge. Version History:...
Categories: Data, Data Release - Revised; Tags: Aerial Photography, Alaska, Arctic Network, Bering Land Bridge National Preserve, Biota, All tags...
thumbnail
This dataset is comprised of 11 geo-referenced aerial images of two study areas (Teshekpuk Lake Special Area and the Chipp River) in the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain. The images are from aerial photo survey flown by NASA in 1974, 1977, 1979 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website in 2013. The images represent a historical snapshot of the landscape from that time. Version History: First release: March 2015 Revised September 2022 (ver. 1.1)
thumbnail
This dataset is comprised of one geo-referenced aerial image from the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain taken on 21 June 1955 by the U.S. Air Force and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website in 2013. The image represents a historical snapshot of the landscape from that time. Version History: First release: March 2015 Revised September 2022 (ver. 1.1)
thumbnail
This dataset provides computed remotely-sensed streamflows (RSQ) at river reaches of selected rivers in Alaska. We used the relation between water-surface elevation data derived from satellite altimetry and dynamic surface water extent data derived from LANDSAT and Sentinel imagery data with the Modified Optimized Manning Method Algorithm (MOMMA) to compute remotely sensed streamflows. Data are organized in ZIP packages named for each river reach. Reach-specific details are provided in a README file included in each river reach ZIP package. Depending on the input data available for specific reaches, we used different workflows to estimate river reach width and process the data from river reaches. Each workflow...
thumbnail
Since 1993 the U.S. Geological Survey (USGS) has worked with the Alaska Department of Transportation and Public Facilities (ADOT&PF) to provide hydraulic assessments of scour for bridges throughout Alaska. As part of this effort, repeat channel cross section surveys, or channel soundings, have been collected at either the upstream or downstream side of bridges on an annual or as needed basis. Streambed and bank elevations are measured using USGS sounding weights and reels, weighted measuring tapes, acoustic Doppler current profilers, multibeam echo sounders and light detection and ranging and are referenced to the datum of as-built plan set to provide context for the streambed elevations in relation to bridge structures....
thumbnail
This data package includes 17,014 pairs of raster geotiffs. Each pair is made up of two geotiff rasters derived from historical observations from Landsat satellites (04-09) over the Yukon, Kuskokwim, and Tanana rivers in Alaska. One raster reports estimated mid-day water surface temperature (ST) in degrees Celsius (deg_Cc). The second raster reports the surface temperature quality assessment (sST_QA_c) and provides the ST product uncertainty (also in degrees). The period of observation is May through October for the years 1984-2022.
thumbnail
This data release includes 5 child items with photos and videos taken during low altitude photo survey transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk Valley National Park, and Noatak National Preserve) and the U.S. Fish and Wildlife Service's Selawik National Wildlife Refuge. The aerial photo surveys were flown for the WildCast Project (WILDlife Potential Habitat ForeCASTing), a collaboration of the U.S. Geological Survey, National Park Service, U.S. Fish and Wildlife Service, and...
Categories: Data, Data Release - Revised; Tags: Aerial Photography, Alaska, Arctic Network, Bering Land Bridge National Preserve, Biota, All tags...
thumbnail
This dataset includes locations, and water surface elevations from two submersible pressure transducers deployed in the channel of the Tanana River downstream of Fairbanks Alaska in 2016.
thumbnail
These data include water chemistry from springs, streams, rivers, and shallow groundwater collected in the Arctic National Wildlife Refuge in northern Alaska. Chemical analyses were performed for hydrochemical parameters including field parameters, major ions, nutrients, metals, stable isotopes of water, and tritium, as well as for dissolved gases useful for determining the timescale over which the water was in the subsurface (i.e. age dating tracers), including noble gases and chlorofluorocarbons.
thumbnail
This dataset summarizes selected basin and streamflow special conditions for USGS streamgages in Alaska that are commonly used for site and period of record selection for regional analyses, through water year 2022. The data consist of a table providing information about the type of streamflow available for the site, site special conditions related to the timing of data collection, basin special conditions related to drainage area and urbanization, and a summary of water years for daily mean streamflow and annual peak streamflow affected by regulation or outburst flooding. The data were compiled using peak-streamflow codes assigned in the USGS National Water Information System (NWIS; https://doi.org/10.5066/F7P55KJN),...
thumbnail
These are data from cruises carried out in April, May and July 2010 from the Copper River (AK) mouth to beyond the shelf break, approximately 150 km from shore. The focus of the dataset is the iron (Fe) data, intended to help infer the processes controlling concentrations of Fe. The data include concentrations of total dissolvable Fe (TDFe), dissolved Fe (dFe), nitrate, and salinity, temperature and fluorescence data (CTD) as background. This also includes sea surface height deviation data for a two month interval when a Yakutat eddy passed by the sampling site. Also included is a simple 1-dimensional numerical model used to simulate the the April DFe data assuming a DFe flux from shelf sediments, horizontal transport...
thumbnail
This is a child item of the USGS Data Release: https://doi.org/10.5066/P9KFIRWQ This dataset contains aerial oblique video segments from a Panasonic Lumix DMC-FZ200 (24x superzoom, variable focal length) and a Panasonic Lumix DMC-SZ7 (10x superzoom, variable focal length) of the arctic landscape during low altitude transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk Valley National Park, and Noatak National Preserve) and the U.S. Fish and Wildlife Service's Selawik National Wildlife Refuge....
Categories: Data, Data Release - Revised; Tags: Aerial Photography, Alaska, Arctic Network, Bering Land Bridge National Preserve, Biota, All tags...
thumbnail
These data comprise 505 unique geospatial raster datasets which describe persistent river ice (aufeis) occurrence within floodplains of select rivers and creeks in the 1002 Area of the Arctic National Wildlife Refuge in northern Alaska. Each raster is derived from a historical observation made by one of five Landsat satellites. Surface reflectance in the green and shortwave infrared wavelengths are used to classify the aufeis occurrence within individual pixels. Pixel values of "1" correspond to aufeis presence while "0" corresponds to its absence. Rasters are generated from cloud and snow-filtered images captured between May and September for the years 1985-2022.
thumbnail
This dataset is comprised of 35 geo-referenced aerial images of four study areas (Teshekpuk Lake Special Area, Chipp River, Colville River Delta, and Dalton Highway Corridor) on Alaska's Arctic Coastal Plain. The images are from aerial photo surveys flown in 1948-1949 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website. The images represent a historical snapshot of the landscape from that time. Version History: First release: March 2015 Revised September 2022 (ver. 1.1)
thumbnail
This is a child item of the USGS Data Release: https://doi.org/10.5066/P9KFIRWQ This dataset contains aerial nadir video segments from a GoPro Hero3 Black Edition (focal length 2.77 mm; 60 frames per second) of the arctic landscape during low altitude photo survey transects in northwest Alaska, July 2013. Two flight transects were conducted from small aircraft over the National Park Service's Bering Land Bridge National Preserve and the U.S. Fish and Wildlife Service's Selawik National Wildlife Refuge. Version History: First release: May 2014 Revised:August 2021 (ver. 1.01) Revised:August 2023 (ver. 1.1)
Categories: Data, Data Release - Revised; Tags: Aerial Photography, Alaska, Arctic Network, Bering Land Bridge National Preserve, Biota, All tags...


map background search result map search result map Gulf of Alaska Shelf and Slope Iron and Nitrate Data, Copper River Region, 2010 Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 3: Oblique Photographs Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 4: Nadir Videos Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 2: Nadir Photographs Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Water Surfaces Elevations from Pressure Transducers on the Tanana River near Fairbanks, Alaska, 2016 Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949 Aerial Image of Alaska's Arctic Coastal Plain, 1955 Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979 Computed Streamflow Using Satellite Data for Selected Rivers in Alaska Selected Peak-Flow Special Conditions for USGS Streamgages in Alaska Rasters of Observed Aufeis Deposits Within Rivers of the 1002 Area Based on Historical Landsat Imagery, 1985-2022 Hydrochemistry and Age Date Tracers from Springs, Streams, and Rivers in the Arctic National Wildlife Refuge, 2019-2022 Historical Landsat-Derived Water Surface Temperature for Three Large Alaska Rivers 1984-2022 Sounding Cross Section Surveys at Alaska Bridge Crossings Selected Basin Boundaries for USGS Streamgages in Alaska through 2019 Child Item 5: Oblique Videos Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Surface Water and Groundwater Hydrology and Temperature, Beaver Creek, Kenai Peninsula, Alaska, 2022-2023 Summary of Selected Basin and Streamflow Special Conditions for USGS Streamgages in Alaska Water Surfaces Elevations from Pressure Transducers on the Tanana River near Fairbanks, Alaska, 2016 Surface Water and Groundwater Hydrology and Temperature, Beaver Creek, Kenai Peninsula, Alaska, 2022-2023 Rasters of Observed Aufeis Deposits Within Rivers of the 1002 Area Based on Historical Landsat Imagery, 1985-2022 Hydrochemistry and Age Date Tracers from Springs, Streams, and Rivers in the Arctic National Wildlife Refuge, 2019-2022 Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949 Aerial Image of Alaska's Arctic Coastal Plain, 1955 Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979 Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 3: Oblique Photographs Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 4: Nadir Videos Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 2: Nadir Photographs Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Child Item 5: Oblique Videos Taken During Low-Altitude Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Historical Landsat-Derived Water Surface Temperature for Three Large Alaska Rivers 1984-2022 Computed Streamflow Using Satellite Data for Selected Rivers in Alaska Summary of Selected Basin and Streamflow Special Conditions for USGS Streamgages in Alaska Sounding Cross Section Surveys at Alaska Bridge Crossings Selected Basin Boundaries for USGS Streamgages in Alaska through 2019 Selected Peak-Flow Special Conditions for USGS Streamgages in Alaska