Type of resources
Data Type: Oceans/Coasts; A data set of AVHRR derived sea surface temperature for the SEA study area. This project is not yet complete. The aim of the project is to develop an annual spring through summer time-series of ocean temperatures for 1985-1990. These layers are being produced using the same protocols as that being used by Dr. David Eslinger and his students at the University of Alaska Fairbanks (UAF) to process daily sea surface temperature under another project. Eventually, they hope to integrate the two data sets into one uninterrupted series.
Parameter SST from AVHRR Measurement Details "SST measurements from AVHRR instrument on polar orbiting weather satellites. Spatial resolution is about 1 km (at nadir). Cloud cover is a SERIOUS limitation to this data set. Calibration of satellite data to actual sea surface temperature values requires some ""ground-truth"" (can be provided from the buoy system). Satellite pass images are reviewed and rectified images are produced for selected areas when cloud cover permits. Cloud cover makes the data archive heavily biased towards summer images." Geographic Area California coast to Beaufort Sea IOSPBS Data Distribution Searchable database of images (by time, area) available at IOS. Images are retrieved from off-line storage on request. PSARC_Utility "Limited use (directly) in stock assessment. Satellite images provide areal coverage that is helpful in interpreting the significance of ""fixed point"" measurements such as lighthouse or buoy measurements." Improvements "On-line searchable inventory of images would be useful, particularly if low-resolution ""quick look"" images could be incorporated." [ A TCODE project ]
Data Type: Remotely Sensed Data; Alaska AVHRR Data Set is comprised of twice-monthly maximum Normalized Difference Vegetation Index (NDVI) composites created from daily NOAA-11 satellite observations. The goal of the Alaska AVHRR project is to compile a comprehensive time series data set of calibrated, georegistered daily observations and twice monthly maximum NDVI composites for each annual growing season. This data set has applications for environmental monitoring and assessing impacts of global climate change. The NDVI composites include ten bands of information: AVHRR channels 1-5, maximum NDVI, satellite zenith, solar zenith, and relative azimuth. The daily observations, bands 1-9, have been calibrated to reflectance, scaled to byte data, and geometrically registered to the Albers Equal-Area Conic map projection. The tenth band is a pointer to identify the date and scene ID of the source daily observation (scene) for each pixel. All image processing was conducted using the Land Analysis System (LAS) software. Often when displaying data covering large areas, such as AVHRR data, it is beneficial to include an overlay of familiar linework as a location aid, or a mask to derive statistical data for regions. All of the line work images represent lines in raster format as 1 km cells and the strata are represented as polygons registered to the AVHRR data. The line work and raster polygon data sets include are the international boundaries, Alaskan roads and Trans-Alaska Pipeline, and a raster polygon mask of the State borders. The EROS Data Center standard product is a set of multiple CD-ROM.
AVHRR SST data with 1-3km resolution fields over the CCS. For full data description and data access information go to http://coho.coas.oregonstate.edu/AAGBCREADME.TXT. Data can be accessed through anonymous ftp at ftp://pisco.coas.oregonstate.edu/ebc. [ Reference: PICES Scientific Report No. 18 2001, Proceedings of the PICES/CoML/IPRC Workshop on "Impact of Climate Variability on Observation and Prediction of Ecosystem and Biodiversity Changes in the North Pacific", http://www.pices.int/publications/scientific_reports/Report18/default.aspx. ]
The right whale is the most endangered of all the large whales. The population in the North Pacific is thought to number only a few hundred individuals and recent sightings in the eastern Bering Sea are the only encouraging sign for this species. We will study these individuals to identify (1) their summer and fall foraging range, (2) their presumed late fall migration route, and (3) their winter habitat. Previous research by our team has identified North Atlantic right whales, Pacific blue whales, and Pacific humpbacks using oceanographic structures such as upwellings, eddies, and boundary regions as feeding areas. Our hypothesis is that similar areas may also be used by right whales of the North Pacific/Bering Sea. We propose to tag and track right whales in the Bering Sea during the next two years using satellite-monitored radio tags to identify these areas. We will correlate whale movements with bottom topography, television infrared observation satellite (TIROS)-N infrared images that provide sea surface temperature data (AVHRR) and productivity indices (SeaWiFS). MOCNESS samples will also enable us to identify prey species and to better describe the feeding habitats of right whales. Biopsy samples will be taken at the time of tagging to determine sex, examine genetic relationships, and test for contaminant levels. The Central Scientific Issues of the North Pacific Marine Research program suggest that we can learn more about the recent change in biological productivity in the Bering Sea ecosystem from right whales. We feel our research will provide substantial information regarding the seasonal movements of this little-known whale, which may help in better understanding species interactions within the Bering Sea ecosystem. Lipid content and contaminant testing of the biopsy samples will address body condition and risk from pollutants. An NPMR project
Four years (1 January 1973 through 31 December 1976) of Arctic and Antarctic sea ice conditions, derived from Nimbus-5 Electrically Scanning Microwave Radiometer (ESMR) brightness temperatures (TB), are mapped on polar stereographic grids enclosing the 50 degree north and 50 degree south latitude circles. Grid size varies from about 32 by 32 km at the poles to about 28 by 28 km at 50 degrees. Sea ice concentrations were calculated from TBs for each grid point with an algorithm that uses an emissivity value of 0.92 and an ice physical temperature estimate from climatological surface air temperatures. Monthly, multiyear monthly and yearly grids of TB's and sea ice concentrations were created for 1973-1976, except for seven months for which usable data were insufficient. Three-day averaged TB grids are also available for both hemispheres (two tapes per hemisphere.) Data produced by H.J. Zwally, C.L. Parkinson, J.C. Comiso, all of NASA/Goddard Space Flight Center. Published atlases for Arctic and Antarctic are available (NASA SP-489, 1987 and NASA-SP-459, 1983, respectively.) Data available via ftp, or can be packaged on 4mm or 8mm tape; data reports provided with data orders.
Imagery obtained from an Advanced Very High Resolution Radiometer (AVHRR). The AVHRR satellite imagery is collected by NOAA and is available in positive transparency format for 1974 to the present. Several passes a day covering the Beaufort, Chukchi and Bering Seas as well as mainland Alaska and the Gulf of Alaska are received in visual and infrared format. Also available are facsimile paper prints from 1982 to present.