NOAA National Oceanographic Data Center (NOAA/NODC)
20110902
4 km AVHRR Pathfinder v5.0 Global Day-Night Sea Surface Temperature Averages, 1985-2009 (NODC Accession 0077816)
1
data files
Silver Spring, MD U.S.A.
NOAA National Oceanographic Data Center
These SST averages were produced from monthly cloud-screened day-night averages of Pathfinder v5 SST data from 1985-2009, which are archived at the National Oceanographic Data Center.
https://accession.nodc.noaa.gov/0077816
This data set contains a set of monthly and yearly global day-night sea surface temperature averages, derived from the AVHRR Pathfinder Version 5 sea surface temperature cloudscreened data set (http://pathfinder.nodc.noaa.gov) in GeoTIFF format. The AVHRR Pathfinder SST data sets provide the longest, most accurate, and highest resolution consistently-reprocessed SST climate data record from the AVHRR sensor series. These day-night combined monthly and yearly means were produced from cloud-screened day-night monthly full resolution files of Pathfinder SST data from 1985-2009. The data are available for download at https://accession.nodc.noaa.gov/0077816 or through the NODC Geoportal at https://data.nodc.noaa.gov/geoportal/. The original .HDF files are archived at the National Oceanographic Data Center under separate accession numbers. The GeoTIFF SST averages were assigned projection GCS_WGS_1984. In addition, browse images in .png format with an associated .kml file for each year are included with these data as well as detailed metadata.
These data files were produced to facilitate the utilization of high resolution Pathfinder v5 sea surface temperature data within geographic information system (GIS)software.
A land mask is not included with these data. The NODC does not routinely provide land masks in its products. A suggested shoreline is the Global Self-consistent Hierarchical High-resolution Shoreline Database (GSHHS) available at http://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html and http://www.soest.hawaii.edu/pwessel/gshhs/index.html (Wessel, P., and W. H. F. Smith, A Global Self-consistent, Hierarchical, High-resolution Shoreline Database, J. Geophys. Res., 101, 8741-8743, 1996.)
During the averaging process, NODATA pixels were not included; data pixels with no corresponding data pixels were maintained as their original number to maximize the amount of available data. The complete product development process is available at http://www.nodc.noaa.gov/SatelliteData/pathfinder4km/PFV5_GIS_tutorial.html.
The NODC collection of value-added, cloud-screened products in HDF4 were developed from original AVHRR Pathfinder files archived at the NODC. These products contain daytime, nighttime, and day-night averaged data of quality flags 4-7, as well as standard deviation and pixel count information. They have been produced from the original Pathfinder Version 5.0 data by NODC for Daily, 5-day, 7-day, and monthly temporal averages at 4km and one degree spatial resolution, as well as five degree spatial resolution for monthly products. The monthly full resolution products were utilized to develop the final GIS files of this data set. While these cloudscreened files are derived from official Pathfinder Version 5.0 data, they are NOT part of the official NODC Version 5.0 collection. To access this collection use the Version5.0/ directory at the NODC's Pathfinder section of the website. For more information on their provenance, contents, or relationship to official Pathfinder Version 5.0 data, please contact Ken Casey at Kenneth.Casey@noaa.gov. NODC December 2010
19850101
Unknown
20091231
Unknown
publication date
As needed
-180.0
180.0
90.0
-90.0
NCEI Geoportal FilterCoRIS_Metadata
NODC DATA TYPES THESAURUS
Sea Surface Temperature
NODC INSTRUMENT TYPES THESAURUS
AVHRR > Advanced Very High Resolution Radiometer
AVHRR-GAC
NODC OBSERVATION TYPES THESAURUS
satellite data
GIS product
NODC PLATFORM NAMES THESAURUS
326S - SATELLITE
NOAA-7 SATELLITE
NOAA-9 SATELLITE
NOAA-11 SATELLITE
NOAA-14 SATELLITE
NOAA-16 SATELLITE
NOAA-17 SATELLITE
NOAA-18 SATELLITE
NODC COLLECTING INSTITUTION NAMES THESAURUS
UNIVERSITY OF MIAMI; ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE
US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER
Global Change Master Directory (GCMD)
EARTH SCIENCE > Biosphere > Aquatic Habitat > Coastal Habitat
EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat
EARTH SCIENCE > Climate Indicators
EARTH SCIENCE > Hydrosphere > Water Quality > Water Temperature
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > 4km Pathfinder
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > 9km Pathfinder
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > MCSST
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > NLSST
NOAA Coral Reef Information System (CoRIS) Theme Keyword Thesaurus 20090109
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR
EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > AVHRR
NODC PROJECT NAMES THESAURUS
Pathfinder
NODC COLLECTING INSTITUTION NAMES THESAURUS
UNIVERSITY OF MIAMI; ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE
US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER
NODC SUBMITTING INSTITUTION NAMES THESAURUS
US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER
ISO 19115 Topic Category
climatologyMeteorologyAtmosphere
004
oceans
014
environment
007
biota
002
economy
005
CoRIS Discovery Thesaurus
Map Images > Sea Surface Temperature
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR
EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > AVHRR
NODC SEA AREA NAMES THESAURUS
World-Wide Distribution
North Pacific Ocean
South Pacific Ocean
North Atlantic Ocean
South Atlantic Ocean
Indian Ocean
Arctic Ocean
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii > Hawaii (21N160W0000)
COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii (21N160W0000)
OCEAN BASIN > Atlantic Ocean
OCEAN BASIN > Indian Ocean
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000)
COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000)
COUNTRY/TERRITORY > United States of America > Puerto Rico > Puerto Rico (18N066W0000)
OCEAN BASIN > Atlantic Ocean > Caribbean Sea /North Atlantic Ocean > Puerto Rico > Puerto Rico (18N066W0000)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)
COUNTRY/TERRITORY > United States of America > Navassa Island > Navassa Island > Navassa Island (18N075W0001)
OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Navassa Island > Navassa Island > Navassa Island (18N075W0001)
COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > U. S. Virgin Islands > U. S. Virgin Islands (17N064W0000)
OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Lesser Antilles > U. S. Virgin Islands (17N064W0000)
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Carolines > Palau ( Belau ) (07N134E0000)
COUNTRY/TERRITORY > Palau > Palau > Palau ( Belau ) (07N134E0000)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000)
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Carolines > Micronesia (07N150E0000)
COUNTRY/TERRITORY > Micronesia > Micronesia (07N150E0000)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Marshall Islands > Marshall Islands (09N168E0000)
COUNTRY/TERRITORY > Marshall Islands > Marshall Islands > Marshall Islands (09N168E0000)
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000)
COUNTRY/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000)
COUNTRY/TERRITORY > United States of America > Florida
OCEAN BASIN > Atlantic Ocean > North Atlantic Ocean > Florida
OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Florida
COUNTRY/TERRITORY > United States of America > Texas > West Flower Garden Banks (27N093W0002)
COUNTRY/TERRITORY > United States of America > Texas > East Flower Garden Banks (27N093W0001)
OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Flower Garden Banks > East Flower Garden Banks (27N093W0001)
OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Flower Garden Banks > West Flower Garden Banks (27N093W0002)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Wake Atoll (19N167E0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Johnston Atoll (16N169W0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Jarvis Island (00S160W0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Kingman Reef (06N162W0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Palmyra Atoll (05N162W0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)
COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Baker Island (00N176W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Wake Atoll > Wake Atoll (19N167E0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Johnston Atoll > Johnston Atoll (16N169W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Jarvis Island (00S160W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Kingman Reef (06N162W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Palmyra Atoll (05N162W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Baker Island > Baker Island (00N176W0001)
OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)
CoRIS Region
PR
Florida
PRIA
AmSam
Guam
CNMI
MHI
NWHI
Palau
RMI
Navassa
USVI
FGB
FSM
None
Please acknowledge the use of these data with - The Pathfinder Version 5 SST Data were provided by the NOAA/National Oceanographic Data Center at URL: http://pathfinder.nodc.noaa.gov
NOAA National Oceanographic Data Center
Sheri Phillips
mailing
SSMC 3, 4th Floor, E/OC1
1315 East-West Highway
Silver Spring
MD
20910
USA
301-713-3277
301-713-3302
NODC.Services@noaa.gov
9-5:00 PM, EST
Phone, FAX, Letter, E-mail during normal business hours
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1985/browse/1985_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1985 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1986/browse/1986_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1986 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1987/browse/1987_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1987 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1988/browse/1988_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1988 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1989/browse/1989_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1989 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1990/browse/1990_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1990 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1991/browse/1991_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1991 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1992/browse/1992_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1992 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1993/browse/1993_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1993 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1994/browse/1994_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1994 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1995/browse/1995_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1995 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1996/browse/1996_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1996 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1997/browse/1997_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1997 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1998/browse/1998_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1998 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/1999/browse/1999_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 1999 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2000/browse/2000_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2000 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2001/browse/2001_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2001 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2002/browse/2002_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2002 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2003/browse/2003_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2003 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2004/browse/2004_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2004 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2005/browse/2005_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2005 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2006/browse/2006_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2006 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2007/browse/2007_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2007 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0077816/2008/browse/2008_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2008 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
https://data.nodc.noaa.gov/nodc/archive/data/0077816/2009/browse/2009_Pathv5.0_daynight_SST_meanc1.png
Browse image of global average yearly sea surface temperatures for 2009 from Pathfinder v5 day/night full resolution cloudscreened files.
PNG
Sheri Phillips, Yuanjie Li, Upendra Dadi, and Tess Brandon, NOAA National Oceanographic Data Center
not applicable
Unclassified
not applicable
Arc GIS, geospatial information system software and/or Google Earth or compatible.
The original .HDF files used to develop these averages are 16-bit files, and pixel values can range from 0 to 65535 (2 to the 16th power). However, realistic pixel values for SST will always be less than 600 or so. The 'calculate histogram' feature was utilized from within Arc-GIS software to establish actual pixel values for each monthly .HDF file used for each yearly average. In addition, a reclassification was performed on each monthly file to remove unrealistic pixel data values of 15 and less. 'Land' has a value of 1. SST in degC = 0.075 x pixel value - 3.
Files were visually inspected to ensure a valid sea surface temperature range and distribution. As an additional spot-check, for several years, files were then compared against annual averages calculated in Matlab. Differences between GIS- and Matlab-derived annual averages were found to be negligible, and could be attributed to rounding error.
A reclassification was performed utilizing GIS software against each monthly .HDF file used in producing each yearly average to remove artifact pixel values of 15 and less.
The major sources of error in geo-locating AVHRR data are (a) drift in the spacecraft clock (which causes errors in the estimated along-track position), and (b) uncertainty errors in spacecraft and sensor attitude. (a) Clock Correction To minimize error in the along track position estimated by the orbital model, a satellite a clock correction factor is applied to the time code imbedded in each piece. The method used to determine these clock correction factors is presented below. The clock aboard a given satellite drifts continually at a relatively constant rate (e.g., for NOAA-14, ~9msday-1) compared to the reference clock on Earth. Because of this drift, the NOAA/NESDIS Satellite Operation Control Center periodically sends a command to the satellite to reset the on-board clock to a new baseline thereby eliminating the accumulation of a large time offset error between the Earth and satellite clocks. To correct for clock drift between these resets, correction factors were determined from a database of satellite clock time and Earth time offsets collected at the RSMAS High Resolution Picture Transmission (HRPT) receiving station. During HRPT transmission, both the satellite clock (used to create the embedded time code in each piece) and the Earth clock are simultaneously available. The clock correction bias was determined by (1) visual examination of the Earth/satellite clock differences collected in the database to locate the precise magnitude and timing of clock resets performed by the Satellite Operation Control Center and (2) recorded time differences between the identified reset periods were then filtered to remove spurious noise, and regressed against the corresponding satellite time to determine the clock drift correction. These drift corrections were then applied to all data time-stamped during a given reset period. Refer to Sea Surface Temperature Global Area Coverage (GAC) Processing Appendix A: Calibration and Navigation Correction Factors for a list of clock offsets for each NOAA spacecraft (http://www.rsmas.miami.edu/groups/rrsl/pathfinder/Processing/proc_app_a.html). (b) Attitude Corrections - After clock correction, a nominal attitude correction is then applied to minimize the uncertainty in regard to the direction in which the spacecraft is pointing. The nominal attitude correction applied was determined by averaging the absolute attitude of the spacecraft over many geographic locations and times along the orbital track. The method used to determine the absolute attitude of the spacecraft involves matching a digital coastal outline to a given image and recording the amount of pitch, yaw, and roll required to make the outline and land coincide. This method has the advantage that it can be performed over small geographical distances and is similar to other techniques which rely on widely separated geographical control points to anchor the navigation. The resultant navigation information, output by the SECTOR procedure for each piece, provides the mapping parameters needed to convert between the satellite perspective of pixel and scan line, and Earth-based latitude and longitude coordinates. Refer to Sea Surface Temperature Global Area Coverage (GAC) Processing Appendix A: Calibration and Navigation Correction Factors for attitude correction factors for each NOAA spacecraft (http://www.rsmas.miami.edu/groups/rrsl/pathfinder/Processing/proc_app_a.html).
Refer to the Horizontal Positional Accuracy Report of this metadata record for a discussion of sources of error in geo-locating AVHRR data.
NOAA National Oceanographic Data Center
20110422
Unknown
Pathfinder v5.0 Cloudscreened data product files
data files
Silver Spring, MD
NOAA National Oceanographic Data Center
The AVHRR Pathfinder data files are a collection of value-added, cloud-screened products in HDF4. These products contain daytime, nighttime, and day-night averaged data of quality flags 4-7 only, as well as standard deviation and pixel count information. They have been produced from the original Pathfinder Version 5.0 data by NODC for Daily, 5-day, 7-day, and monthly temporal averages at 4km and one degree spatial resolution, as well as five degree spatial resolution for monthly products. While these files are derived from official Pathfinder Version 5.0 data, they are NOT part of the official NODC Pathfinder Version 5.0 collection. To access this collection use the Version5.0/directory at NODC's online Pathfinder pages For more information on their provenance, contents, or relationship to official Pathfinder Version 5.0 data, please contact Ken Casey at Kenneth.Casey@noaa.gov. NODC December 2010
http://www.nodc.noaa.gov/SatelliteData/pathfinder4km/available.html
5
data files
19850101
Unknown
20091231
Unknown
publication date
Pathfinder v5 monthly cloudscreened files
Monthly and yearly GIS-format SST averages were developed from the AVHRR Pathfinder v5 cloudscreened day-night monthly files.
The SST averages were developed within ESRI Corporation ArcGIS v10.0 software in combination with the ArcGIS Spatial Analyst Tool. Basic procedure - 1) Obtain 12 months of Pathfinder yearly cloudscreened files for a given year. For each month: 2) In GIS, run histogram for each layer month 3) Assign null value (NODATA) to 0 (land) via SETNULL, RASTER CALCULATOR, or reclassification for each layer month (e.g, pixel values less than 15 are assigned NODATA). 4) Use RASTER CALCULATOR to convert pixel values for each month to degrees C (Raster *.075 -3). 5) Use LOCAL CELL STATISTICS TOOL to compute average for the 12 month period. During the averaging process, NODATA pixels were not included; data pixels with no corresponding data pixels were maintained as their original number to maximize the amount of available data. The complete product development process is available at http://www.nodc.noaa.gov/SatelliteData/pathfinder4km/PFV5_GIS_tutorial.html and is documented in the NODC_Path5_means_methodology.pdf file. 6) Assign projection.
20110408
NOAA National Oceanographic Data Center
Sheri Phillips
Oceanographer
mailing
SSMC3, 4th Floor, E/OC1
1315 East-West Highway
Silver Spring
MD
20910
USA
301-713-3277
301-713-3302
NODC.Services@noaa.gov
9-5:30 PM, EST
Phone/FAX/E-mail/letter during normal business hours
Unknown
Global sea surface temperature values (-180 to 180 and -90 to 90 longitude and latitude)
Raster
Pixel
4096
8192
.0439
.0439
Decimal Degrees
WGS84
WGS84
6378137.0
298.257223563
Pathfinder Version 5.0 SST Data
Temporal averages of SST data (monthly and yearly)
NOAA National Oceanographic Data Center/Satellite Oceanography Group
All Pixel Sea Surface Temperature (SST)
The all-pixel SST files contain values for each pixel location, including those contaminated with clouds or other sources of error. The Overall Quality Flag values (4-7) may be used to filter out these unwanted values. The SST value in each pixel location is an average of the highest quality AVHRR Global Area Coverage (GAC) observations available in each roughly 4 km bin. SST is a difficult parameter to define exactly because the upper ocean (~10 m) has a complex and variable vertical temperature structure that is related to ocean turbulence and the air-sea fluxes of heat, moisture and momentum. Definitions of SST provide a necessary theoretical framework that can be used to understand the information content and relationships between measurements of SST made by different instruments. The following explanatory statements attempt to provide this framework and encapsulate the effects of the dominant heat transport processes and time scale of variability associated with distinct vertical and volume regimes within a vertical element of the water column (horizontal and temporal variability is implicitly assumed): -The interface SST, SSTint, is the temperature of an infinitely thin layer at the exact air-sea interface. It represents the temperature at the top of the SSTskin temperature gradient (layer) and cannot be measured using current technology. It is important to note that it is the SSTint that interacts with the atmosphere. -The skin SST, SSTskin, is a temperature measured within a thin water layer (<500 micrometer) adjacent to the air-sea interface. It is where conductive, diffusive and molecular heat transfer processes dominate. A strong vertical temperature gradient is characteristically maintained in this thin layer sustained by the magnitude and direction of the ocean-atmosphere heat flux. Thus, SSTskin varies according to the actual measurement depth within the layer. This layer provides the connectivity between
Modified from http://podaac.jpl.nasa.gov/ghrsst/SST-definitions.html
sea surface temperature
The .HDF files are 16-bit files, and pixel values can range from 0 to 65535 (2 to the 16th power). However, realistic pixel values for SST will always be less than 600 or so. SST in degrees C = (0.075 * pixel value) - 3.0, so a pixel value of 600 equals 42 degrees C, a temperature which exceeds normal SST limits. Temperatures are represented in 0.075 degree C increments
Dr. Kenneth Casey, NOAA/NODC/Satellite Oceanography Group
AVHRR Pathfinder v5 monthly and yearly means of day-night combined sea surface temperatures in GIS-ready format (developed from Pathfinder v5 day-night cloudscreened files, quality level 4-7)
NOAA National Oceanographic Data Center/Satellite Oceanography Group
NOAA National Oceanographic Data Center
NODC User Services
mailing and physical
NOAA/NESDIS E/OC1
SSMC3, 4th Floor
1315 East-West Highway
Silver Spring
MD
20910-3282
USA
301-713-3277
301-713-3302
NODC.Services@noaa.gov
9-5:30 PM, EST
Phone/FAX/E-mail/Letter during regular business hours
Downloadable Data
NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA and NODC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
TIFF
201109
GeoTIFF
Global monthly and yearly SST averages developed from Pathfinder v. 5 day-night cloudscreened full resolution data
No compression applied
11250.0
https://accession.nodc.noaa.gov/0077816
Data may be directly downloaded at the URL listed or accessed through the NODC website at: http://www.nodc.noaa.gov/Archive/Search. NODC can be contacted directly for custom orders. (When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record).
PC, Mac, Linux, UNIX, Standard Internet browser; FTP capability
PNG
201109
Portable Network Graphics
Browse graphics associated with corresponding SST GeoTIFFs
No compression applied
3750.0
https://accession.nodc.noaa.gov/0077816
Data may be directly downloaded at the URL listed or accessed through the NODC website at: http://www.nodc.noaa.gov/Archive/Search. NODC can be contacted directly for custom orders. (When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record).
PC, Mac, Linux, Unix; standard web browser
KML
The file Pathfinder_v5.0_monthly&yearly_mean_daynight_SST.kml links to and displays monthly and yearly SST .png browse images included in this data set. Additional .kml files for individual years are in each yearly browse folder.
No compression applied
.21191
http://www.nodc.noaa.gov/archive/arc0041/0077816/2.3/data/0-data/Pathfinder_v5.0_SST-all_kml_file/Pathfinder_v5.0_monthly&yearly_mean_daynight_SST.kml
Data may be directly downloaded at the URL listed or accessed through the NODC website at: http://www.nodc.noaa.gov/Archive/Search. NODC can be contacted directly for custom orders. (When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record).
PC, UNIX, MAC, Linux, standard Internet browser
None for direct download. Contact the NODC for recovery fees for copy to hard media.
These data may be directly downloaded from the NOAA NODC Oceanographic Data Archive, or contact the NODC for custom orders (when ordering data from the NODC, a data set may be referred to by the 7-digit Accession Number listed in the RESOURCE DESCRIPTION field of this metadata record).
Within 24 hours for direct download
TIFF
201109
GeoTIFF
Global monthly and yearly SST averages developed from Pathfinder v. 5 day-night cloudscreened full resolution data
No compression applied
11250.0
ftp://ftp-oceans.ncei.noaa.gov/pub/data.nodc/ncei/archive/data/0077816/
Navigate to the ftp location listed in this metadata record, or contact the NODC for custom orders (when ordering data from the NODC, a data set may be referred to by the 7-digit Accession Number listed in the RESOURCE DESCRIPTION field of this metadata record).
PC, Unix, Mac, Linux; Internet browser; FTP capability
PNG
201109
GeoTIFFs exported to .png via ArcMap v10
Browse graphics associated with corresponding SST GeoTIFFs
No compression applied
3750.0
ftp://ftp-oceans.ncei.noaa.gov/pub/data.nodc/ncei/archive/data/0077816/
Navigate to the ftp location listed in this metadata record, or contact the NODC for custom orders (when ordering data from the NODC, a data set may be referred to by the 7-digit Accession Number listed in the RESOURCE DESCRIPTION field of this metadata record).
PC, Mac, Unix, Linux; standard Internet browser, FTP capability
KML
The file Pathfinder_v5.0_monthly&yearly_mean_daynight_SST.kml contains and displays monthly and yearly SST .png browse images included in this data set. Additional .kml files for individual years are in each yearly browse folder.
No compression applied
.21191
ftp://ftp.nodc.noaa.gov/nodc/archive/arc0041/0077816/
Navigate to the ftp location listed in this metadata record, or contact the NODC for custom orders (when ordering data from the NODC, a data set may be referred to by the 7-digit Accession Number listed in the RESOURCE DESCRIPTION field of this metadata record).
PC, UNIX, MAC, Linux, standard Internet browser, FTP capability
None for direct download, contact the NODC for custom orders
Navigate to the ftp location listed in this metadata record, or contact the NODC for custom orders (when ordering data from the NODC, a data set may be referred to by the 7-digit Accession Number listed in the RESOURCE DESCRIPTION field of this metadata record).
Usually within 24 hours.
Contact the NODC User Services Group via phone/FAX/E-mail: nodc.services@noaa.gov
PC, Mac, UNIX or other, standard Internet browser, ability to work with/utilize GIS files strongly recommended, knowledge of satellite data products
20110930
Unknown
Present
20230830
20120502
20120730
NOAA National Oceanographic Data Center
Sheri Phillips
oceanographer
mailing
SSMC3, 4th Floor, E/OC1
1315 East-West Highway
Silver Spring
Maryland
20910
USA
301-713-3280 x127
301-713-3302
sheri.phillips@noaa.gov
10-6:30 PM, EST
Phone, E-mail, letter at address listed in this metadata record
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
none
none
not applicable
Unclassified
not applicable
20120203071909
None
19850101
20091231
https://www.coris.noaa.gov/metadata/records/html/fgdc_meta_0077816_short_version.html
6439