4 km AVHRR Pathfinder v5.0 Global Day-Night Sea Surface Temperature Averages, 1985-2009 (NODC Accession 0077816)

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information
• CoRIS

Identification_Information:

Citation:

Citation_Information:

Originator: NOAA National Oceanographic Data Center (NOAA/NODC)

Publication_Date: 20110902

Title:

4 km AVHRR Pathfinder v5.0 Global Day-Night Sea Surface Temperature Averages, 1985-2009 (NODC Accession 0077816)

Edition: 1

Geospatial_Data_Presentation_Form: data files

Publication_Information:

Publication_Place: Silver Spring, MD U.S.A.

Publisher: NOAA National Oceanographic Data Center

Other_Citation_Details:

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.

Online_Linkage: https://accession.nodc.noaa.gov/0077816

Description:

Abstract:

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.

Purpose:

These data files were produced to facilitate the utilization of high resolution Pathfinder v5 sea surface temperature data within geographic information system (GIS)software.

Supplemental_Information:

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

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19850101

Beginning_Time: Unknown

Ending_Date: 20091231

Ending_Time: Unknown

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: 180.0

North_Bounding_Coordinate: 90.0

South_Bounding_Coordinate: -90.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: NODC DATA TYPES THESAURUS

Theme_Keyword: Sea Surface Temperature

Theme:

Theme_Keyword_Thesaurus: NODC INSTRUMENT TYPES THESAURUS

Theme_Keyword: AVHRR > Advanced Very High Resolution Radiometer

Theme_Keyword: AVHRR-GAC

Theme:

Theme_Keyword_Thesaurus: NODC OBSERVATION TYPES THESAURUS

Theme_Keyword: satellite data

Theme_Keyword: GIS product

Theme:

Theme_Keyword_Thesaurus: NODC PLATFORM NAMES THESAURUS

Theme_Keyword: 326S - SATELLITE

Theme_Keyword: NOAA-7 SATELLITE

Theme_Keyword: NOAA-9 SATELLITE

Theme_Keyword: NOAA-11 SATELLITE

Theme_Keyword: NOAA-14 SATELLITE

Theme_Keyword: NOAA-16 SATELLITE

Theme_Keyword: NOAA-17 SATELLITE

Theme_Keyword: NOAA-18 SATELLITE

Theme:

Theme_Keyword_Thesaurus: NODC COLLECTING INSTITUTION NAMES THESAURUS

Theme_Keyword:

UNIVERSITY OF MIAMI; ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE

Theme_Keyword: US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER

Theme:

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Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Coastal Habitat

Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat

Theme_Keyword: EARTH SCIENCE > Climate Indicators

Theme_Keyword: EARTH SCIENCE > Hydrosphere > Water Quality > Water Temperature

Theme_Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > 4km Pathfinder

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > 9km Pathfinder

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > MCSST

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR > NLSST

Theme:

Theme_Keyword_Thesaurus:

NOAA Coral Reef Information System (CoRIS) Theme Keyword Thesaurus 20090109

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR

Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature

Theme_Keyword:

EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > AVHRR

Theme:

Theme_Keyword_Thesaurus: NODC PROJECT NAMES THESAURUS

Theme_Keyword: Pathfinder

Theme:

Theme_Keyword_Thesaurus: NODC COLLECTING INSTITUTION NAMES THESAURUS

Theme_Keyword:

UNIVERSITY OF MIAMI; ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE

Theme_Keyword: US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER

Theme:

Theme_Keyword_Thesaurus: NODC SUBMITTING INSTITUTION NAMES THESAURUS

Theme_Keyword: US DOC; NOAA; NESDIS; NATIONAL OCEANOGRAPHIC DATA CENTER

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

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Theme_Keyword: 014

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Theme_Keyword: economy

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Theme_Keyword: Map Images > Sea Surface Temperature

Theme:

Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus

Theme_Keyword:

EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature > AVHRR

Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature

Theme_Keyword:

EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > AVHRR

Place:

Place_Keyword_Thesaurus: NODC SEA AREA NAMES THESAURUS

Place_Keyword: World-Wide Distribution

Place_Keyword: North Pacific Ocean

Place_Keyword: South Pacific Ocean

Place_Keyword: North Atlantic Ocean

Place_Keyword: South Atlantic Ocean

Place_Keyword: Indian Ocean

Place_Keyword: Arctic Ocean

Place:

Place_Keyword_Thesaurus: CoRIS Place Thesaurus

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OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii > Hawaii (21N160W0000)

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OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000)

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COUNTRY/TERRITORY > United States of America > Puerto Rico > Puerto Rico (18N066W0000)

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OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)

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COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > Navassa Island > Navassa Island > Navassa Island (18N075W0001)

Place_Keyword:

OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Navassa Island > Navassa Island > Navassa Island (18N075W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > U. S. Virgin Islands > U. S. Virgin Islands (17N064W0000)

Place_Keyword:

OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Lesser Antilles > U. S. Virgin Islands (17N064W0000)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Carolines > Palau ( Belau ) (07N134E0000)

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OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000)

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Place_Keyword: COUNTRY/TERRITORY > United States of America > Florida

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COUNTRY/TERRITORY > United States of America > Texas > West Flower Garden Banks (27N093W0002)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > Texas > East Flower Garden Banks (27N093W0001)

Place_Keyword:

OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Flower Garden Banks > East Flower Garden Banks (27N093W0001)

Place_Keyword:

OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Flower Garden Banks > West Flower Garden Banks (27N093W0002)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Wake Atoll (19N167E0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Johnston Atoll (16N169W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Jarvis Island (00S160W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Kingman Reef (06N162W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Palmyra Atoll (05N162W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Baker Island (00N176W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Wake Atoll > Wake Atoll (19N167E0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Johnston Atoll > Johnston Atoll (16N169W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Jarvis Island (00S160W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Kingman Reef (06N162W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Palmyra Atoll (05N162W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Baker Island > Baker Island (00N176W0001)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)

Place:

Place_Keyword_Thesaurus: CoRIS Region

Place_Keyword: PR

Place_Keyword: Florida

Place_Keyword: PRIA

Place_Keyword: AmSam

Place_Keyword: Guam

Place_Keyword: CNMI

Place_Keyword: MHI

Place_Keyword: NWHI

Place_Keyword: Palau

Place_Keyword: RMI

Place_Keyword: Navassa

Place_Keyword: USVI

Place_Keyword: FGB

Place_Keyword: FSM

Access_Constraints: None

Use_Constraints:

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>

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA National Oceanographic Data Center

Contact_Person: Sheri Phillips

Contact_Address:

Address_Type: mailing

Address: SSMC 3, 4th Floor, E/OC1

Address: 1315 East-West Highway

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone: 301-713-3277

Contact_Facsimile_Telephone: 301-713-3302

Contact_Electronic_Mail_Address: NODC.Services@noaa.gov

Hours_of_Service: 9-5:00 PM, EST

Contact_Instructions: Phone, FAX, Letter, E-mail during normal business hours

Browse_Graphic:

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Browse_Graphic_File_Type: PNG

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Browse_Graphic_File_Type: PNG

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Browse image of global average yearly sea surface temperatures for 2007 from Pathfinder v5 day/night full resolution cloudscreened files.

Browse_Graphic_File_Type: PNG

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Browse_Graphic_File_Type: PNG

Browse_Graphic:

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Browse image of global average yearly sea surface temperatures for 2009 from Pathfinder v5 day/night full resolution cloudscreened files.

Browse_Graphic_File_Type: PNG

Data_Set_Credit:

Sheri Phillips, Yuanjie Li, Upendra Dadi, and Tess Brandon, NOAA National Oceanographic Data Center

Security_Information:

Security_Classification_System: not applicable

Security_Classification: Unclassified

Security_Handling_Description: not applicable

Native_Data_Set_Environment:

Arc GIS, geospatial information system software and/or Google Earth or compatible.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

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.

Logical_Consistency_Report:

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.

Completeness_Report:

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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

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>).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Refer to the Horizontal Positional Accuracy Report of this metadata record for a discussion of sources of error in geo-locating AVHRR data.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: NOAA National Oceanographic Data Center

Publication_Date: 20110422

Publication_Time: Unknown

Title: Pathfinder v5.0 Cloudscreened data product files

Geospatial_Data_Presentation_Form: data files

Publication_Information:

Publication_Place: Silver Spring, MD

Publisher: NOAA National Oceanographic Data Center

Other_Citation_Details:

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

Online_Linkage:

<http://www.nodc.noaa.gov/SatelliteData/pathfinder4km/available.html>

Source_Scale_Denominator: 5

Type_of_Source_Media: data files

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19850101

Beginning_Time: Unknown

Ending_Date: 20091231

Ending_Time: Unknown

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Pathfinder v5 monthly cloudscreened files

Source_Contribution:

Monthly and yearly GIS-format SST averages were developed from the AVHRR Pathfinder v5 cloudscreened day-night monthly files.

Process_Step:

Process_Description:

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.

Process_Date: 20110408

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA National Oceanographic Data Center

Contact_Person: Sheri Phillips

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing

Address: SSMC3, 4th Floor, E/OC1

Address: 1315 East-West Highway

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone: 301-713-3277

Contact_Facsimile_Telephone: 301-713-3302

Contact_Electronic_Mail_Address: NODC.Services@noaa.gov

Hours_of_Service: 9-5:30 PM, EST

Contact_Instructions: Phone/FAX/E-mail/letter during normal business hours

Cloud_Cover: Unknown

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Global sea surface temperature values (-180 to 180 and -90 to 90 longitude and latitude)

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 4096

Column_Count: 8192

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: .0439

Longitude_Resolution: .0439

Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS84

Ellipsoid_Name: WGS84

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Pathfinder Version 5.0 SST Data

Entity_Type_Definition: Temporal averages of SST data (monthly and yearly)

Entity_Type_Definition_Source:

NOAA National Oceanographic Data Center/Satellite Oceanography Group

Attribute:

Attribute_Label: All Pixel Sea Surface Temperature (SST)

Attribute_Definition:

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

Attribute_Definition_Source:

Modified from <http://podaac.jpl.nasa.gov/ghrsst/SST-definitions.html>

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: sea surface temperature

Enumerated_Domain_Value_Definition:

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

Enumerated_Domain_Value_Definition_Source: Dr. Kenneth Casey, NOAA/NODC/Satellite Oceanography Group

Overview_Description:

Entity_and_Attribute_Overview:

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)

Entity_and_Attribute_Detail_Citation:

NOAA National Oceanographic Data Center/Satellite Oceanography Group

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA National Oceanographic Data Center

Contact_Person: NODC User Services

Contact_Address:

Address_Type: mailing and physical

Address: NOAA/NESDIS E/OC1

Address: SSMC3, 4th Floor

Address: 1315 East-West Highway

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910-3282

Country: USA

Contact_Voice_Telephone: 301-713-3277

Contact_Facsimile_Telephone: 301-713-3302

Contact_Electronic_Mail_Address: NODC.Services@noaa.gov

Hours_of_Service: 9-5:30 PM, EST

Contact_Instructions: Phone/FAX/E-mail/Letter during regular business hours

Resource_Description: Downloadable Data

Distribution_Liability:

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: TIFF

Format_Version_Date: 201109

Format_Specification: GeoTIFF

Format_Information_Content:

Global monthly and yearly SST averages developed from Pathfinder v. 5 day-night cloudscreened full resolution data

File_Decompression_Technique: No compression applied

Transfer_Size: 11250.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://accession.nodc.noaa.gov/0077816

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, Mac, Linux, UNIX, Standard Internet browser; FTP capability

Digital_Form:

Digital_Transfer_Information:

Format_Name: PNG

Format_Version_Date: 201109

Format_Specification: Portable Network Graphics

Format_Information_Content: Browse graphics associated with corresponding SST GeoTIFFs

File_Decompression_Technique: No compression applied

Transfer_Size: 3750.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://accession.nodc.noaa.gov/0077816

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, Mac, Linux, Unix; standard web browser

Digital_Form:

Digital_Transfer_Information:

Format_Name: KML

Format_Information_Content:

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.

File_Decompression_Technique: No compression applied

Transfer_Size: .21191

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<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>

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, UNIX, MAC, Linux, standard Internet browser

Fees:

None for direct download. Contact the NODC for recovery fees for copy to hard media.

Ordering_Instructions:

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).

Turnaround: Within 24 hours for direct download

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: TIFF

Format_Version_Date: 201109

Format_Specification: GeoTIFF

Format_Information_Content:

Global monthly and yearly SST averages developed from Pathfinder v. 5 day-night cloudscreened full resolution data

File_Decompression_Technique: No compression applied

Transfer_Size: 11250.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <ftp://ftp.nodc.noaa.gov/nodc/archive/arc0041/0077816/>

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, Unix, Mac, Linux; Internet browser; FTP capability

Digital_Form:

Digital_Transfer_Information:

Format_Name: PNG

Format_Version_Date: 201109

Format_Specification: GeoTIFFs exported to .png via ArcMap v10

Format_Information_Content: Browse graphics associated with corresponding SST GeoTIFFs

File_Decompression_Technique: No compression applied

Transfer_Size: 3750.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <ftp://ftp.nodc.noaa.gov/nodc/archive/arc0041/0077816/>

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, Mac, Unix, Linux; standard Internet browser, FTP capability

Digital_Form:

Digital_Transfer_Information:

Format_Name: KML

Format_Information_Content:

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.

File_Decompression_Technique: No compression applied

Transfer_Size: .21191

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <ftp://ftp.nodc.noaa.gov/nodc/archive/arc0041/0077816/>

Access_Instructions:

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).

Online_Computer_and_Operating_System: PC, UNIX, MAC, Linux, standard Internet browser, FTP capability

Fees: None for direct download, contact the NODC for custom orders

Ordering_Instructions:

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).

Turnaround: Usually within 24 hours.

Custom_Order_Process:

Contact the NODC User Services Group via phone/FAX/E-mail: nodc.services@noaa.gov

Technical_Prerequisites:

PC, Mac, UNIX or other, standard Internet browser, ability to work with/utilize GIS files strongly recommended, knowledge of satellite data products

Available_Time_Period:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20110930

Beginning_Time: Unknown

Ending_Date: Present

Metadata_Reference_Information:

Metadata_Date: 20170124

Metadata_Review_Date: 20120502

Metadata_Future_Review_Date: 20120730

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA National Oceanographic Data Center

Contact_Person: Sheri Phillips

Contact_Position: oceanographer

Contact_Address:

Address_Type: mailing

Address: SSMC3, 4th Floor, E/OC1

Address: 1315 East-West Highway

City: Silver Spring

State_or_Province: Maryland

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone: 301-713-3280 x127

Contact_Facsimile_Telephone: 301-713-3302

Contact_Electronic_Mail_Address: sheri.phillips@noaa.gov

Hours_of_Service: 10-6:30 PM, EST

Contact_Instructions: Phone, E-mail, letter at address listed in this metadata record

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: Local Time

Metadata_Access_Constraints: none

Metadata_Use_Constraints: none

Metadata_Security_Information:

Metadata_Security_Classification_System: not applicable

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: not applicable

CoRIS:

CoRIS_ID: 20120203071909

CoRIS_Children: None

CoRIS_Beginning_Date: 19850101

CoRIS_Ending_Date: 20091231

CoRIS_Metadata_Link:

https://www.coris.noaa.gov/metadata/records/html/fgdc_meta_0077816_short_version.html

CoRIS_Tracking_ID: 6439