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Dataset Title:  SST, Pathfinder Ver 5.3 (L3C), Day, Global, 0.0417°, 1981-present, Science
Quality (Monthly Composite)
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Institution:  NOAA NCEI   (Dataset ID: erdPH53sstdmday)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (Centered Time, UTC) ?      448    30 days 10h 31m 25s (uneven)
  < slider >
 latitude (degrees_north) ?      4320    -0.04166667 (uneven)
  < slider >
 longitude (degrees_east) ?      8640    0.04166667 (uneven)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 sea_surface_temperature (degree_C) ?
 sea_ice_fraction (1) ?
 wind_speed (10m wind speed, m s-1) ?
 l2p_flags ?

File type: (more info)

(Documentation / Bypass this form) ?
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 3.694464e+8, 1.5450048e+9;
    String axis "T";
    String calendar "gregorian";
    String comment "The midpoint of the composite time period.";
    String ioos_category "Time";
    String long_name "Centered Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.97916, 89.97917;
    String axis "Y";
    String comment "Latitude values are the centers of the grid cells";
    String ioos_category "Location";
    String long_name "Latitude";
    String reference_datum "Geographical coordinates, WGS84 datum";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.9792, 179.9792;
    String axis "X";
    String comment "Longitude values are the centers of the grid cells";
    String ioos_category "Location";
    String long_name "Longitude";
    String reference_datum "Geographical coordinates, WGS84 datum";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  sea_surface_temperature {
    Float64 _FillValue -99.99000000000001;
    String ancillary_variables "l2p_flags";
    String cell_methods "time: mean (interval: 1.0 month)";
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String comment "Skin temperature of the ocean. This dataset contains only the highest quality data (level 5, best_quality) as defined by the GHRSST Data Specification version 2.";
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "NOAA Climate Data Record of Sea Surface Skin Temperature";
    String standard_name "sea_surface_skin_temperature";
    String units "degree_C";
    Float64 valid_max 45.0;
    Float64 valid_min -1.8;
  }
  sea_ice_fraction {
    Float64 _FillValue -1.28;
    String cell_methods "time: mean (interval: 1.0 month)";
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "Sea ice concentration data are taken from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSISAF) Global Daily Sea Ice Concentration Reprocessing Data Set (https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0068294) when these data are available. The data are reprojected and interpolated from their original polar stereographic projection at 10km spatial resolution to the 4km Pathfinder Version 5.3 grid. When the OSISAF data are not available for both hemispheres on a given day, the sea ice concentration data are taken from the sea_ice_fraction variable found in the L4 GHRSST DailyOI SST product from NOAA/NCDC, and are interpolated from the 25km DailyOI grid to the 4km Pathfinder Version 5.3 grid.";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "crs";
    String ioos_category "Ice Distribution";
    String long_name "Sea Ice Fraction";
    String references "Reynolds, et al.(2006) Daily High-resolution Blended Analyses. Available at https://doi.org/10.7289/V5SQ8XB5";
    String source "NOAA/NESDIS/NCDC Daily optimum interpolation(OI) SST on 1/4-degree grid";
    String standard_name "sea_ice_area_fraction";
    String units "1";
    Float64 valid_max 1.26;
    Float64 valid_min -1.27;
  }
  wind_speed {
    Byte _FillValue -128;
    String cell_methods "time: mean (interval: 1.0 month)";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String comment "These wind speeds were created by NCEP-DOE Atmospheric Model Intercomparison Project (AMIP-II) reanalysis (R-2) and represent winds at 10 metres above the sea surface.";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "crs";
    String height "10 m";
    String ioos_category "Wind";
    String long_name "10m wind speed";
    String source "NCEP/DOE AMIP-II Reanalysis (Reanalysis-2)";
    String standard_name "wind_speed";
    String units "m s-1";
    Byte valid_max 127;
    Byte valid_min -127;
  }
  l2p_flags {
    Float64 colorBarMaximum 16.0;
    Float64 colorBarMinimum 0.0;
    String comment "Bit zero (0) is always set to zero to indicate infrared data. Bit one (1) is set to zero for any pixel over water (ocean, lakes and rivers). Land pixels were determined by rasterizing the Global Self-consistent Hierarchical High-resolution Shoreline (GSHHS) Database from the NOAA National Geophysical Data Center. Any 4 km Pathfinder pixel whose area is 50% or more covered by land has bit one (1) set to 1. Bit two (2) is set to 1 when the sea_ice_fraction is 0.15 or greater. Bits three (3) and four (4) indicate lake and river pixels, respectively, and were determined by rasterizing the US World Wildlife Fund's Global Lakes and Wetlands Database. Any 4 km Pathfinder pixel whose area is 50% or more covered by lake has bit three (3) set to 1. Any 4 km Pathfinder pixel whose area is 50% or more covered by river has bit four (4) set to 1.";
    String coverage_content_type "referenceInformation";
    Int16 flag_masks 1, 2, 4, 8, 16, 32, 64, 128, 256;
    String flag_meanings "microwave land ice lake river reserved_for_future_use unused_currently unused_currently unused_currently";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "L2P flags";
    Int16 valid_max 256;
    Int16 valid_min 0;
  }
  NC_GLOBAL {
    String acknowledgement "Please acknowledge the use of these data with the following statement: \"These data were provided by GHRSST and the NOAA National Centers for Environmental Information (NCEI). This project was supported in part by a grant from the NOAA Climate Data Record (CDR) Program for satellites. The data were downloaded from NOAA CoastWatch-West Coast Regional Node and Southwest Fisheries Science Center's Environment Research Division.\" To cite these data in a paper, please follow the instructions in the license and at this link: https://coastwatch.pfeg.noaa.gov/erddap/information.html#citeDataset";
    String cdm_data_type "Grid";
    String cdr_id "gov.noaa.ncdc:C00983";
    String cdr_program "NOAA Climate Data Record Program for satellites";
    String cdr_variable "sea_surface_temperature";
    String comment "SST from AVHRR Pathfinder v. 5.3";
    String contributor_name "Kenneth Casey";
    String contributor_role "Source of original L3 daily Pathfinder data";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "erd.data@noaa.gov";
    String creator_institution "NOAA/NMFS/SWFSC/Environmental Research Division, NOAA CoastWatch West Coast";
    String creator_name "NOAA NMFS SWFSC ERD, NOAA CoastWatch West Coast";
    String creator_type "institution";
    String creator_url "https://coastwatch.pfeg.noaa.gov/erddap";
    String date_created "2019-02-27T00:22:52.192Z";
    String date_metadata_modified "2019-02-27T00:22:52.192Z";
    String date_modified "2019-02-27T00:22:52.192Z";
    String day_or_night "Day";
    Float64 Easternmost_Easting 179.9792;
    Float32 easternmost_longitude 180.0;
    String gds_version_id "2.0";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 89.97917;
    Float64 geospatial_lat_min -89.97916;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9792;
    Float64 geospatial_lon_min -179.9792;
    String geospatial_lon_units "degrees_east";
    String history 
"Daily Pathfinder V5.3 data created by NOAA NESDIS NCEI, Kenneth S. Casey (Kenneth.Casey@noaa.gov), et al.
Data periodically downloaded from https://data.nodc.noaa.gov/pathfinder/Version5.3/L3C/ to NOAA NMFS SWFSC ERD.
2018-10-03 Daily Pathfinder Version 5.3 daily composites were obtained from https://coastwatch.pfeg.noaa.gov/erddap/griddap/nceiPH53sstd1day at NOAA NMFS SWFSC ERD by erd.data@noaa.gov . Multi-day composites were created by averaging, pixel by pixel, data from the daily files.
2019-08-20T05:57:51Z (local files)
2019-08-20T05:57:51Z http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdPH53sstdmday.das";
    String id "https://coastwatch.pfeg.noaa.gov/erddap/griddap/nceiPH53sstdmday.html";
    String infoUrl "https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:AVHRR_Pathfinder-NCEI-L3C-v5.3";
    String institution "NOAA NCEI";
    String keywords "10m, advanced, area, atmosphere, atmospheric, avhrr, center, centers, climate, coastwatch, coastwatch west coast, composite, cryosphere, data, day, distribution, earth, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, Earth Science > Oceans > Sea Ice > Ice Extent, environmental, extent, fisheries, flags, fraction, ghrsst, global, high, high-resolution, ice, ice distribution, information, l2p, l2p_flags, l3c, latitude, longitude, marine, monthly, national, ncei, nesdis, nmfs, noaa, ocean, oceans, pathfinder, quality, radiometer, record, resolution, science, science quality, sea, sea_ice_area_fraction, sea_ice_fraction, sea_surface_skin_temperature, sea_surface_temperature, service, skin, southwest, speed, sst, surface, swfsc, temperature, time, very, vhrr, wind, wind_speed, winds";
    String keywords_vocabulary "NASA Global Change Master Directory (GCMD) Science Keywords v8.4";
    String license "These data are available for use without restriction. Please acknowledge the use of these data with the following statement: \"These data were provided by GHRSST and the NOAA National Centers for Environmental Information (NCEI). This project was supported in part by a grant from the NOAA Climate Data Record (CDR) Program for satellites. The data were downloaded from NOAA CoastWatch-West Coast Regional Node and Southwest Fisheries Science Center's Environment Research Division.\" To cite these data in a paper, please follow the instructions in the license and at this link: https://coastwatch.pfeg.noaa.gov/erddap/information.html#citeDataset";
    String metadata_link "https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:AVHRR_Pathfinder-NCEI-L3C-v5.3";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    String ncei_template_version "NCEI_NetCDF_Grid_Template_v2.0";
    Float32 northernmost_latitude 90.0;
    Float64 Northernmost_Northing 89.97917;
    String orbit_node "Ascending";
    String processing_level "L3C";
    String product_version "PFV5.3 (source data)";
    String program "NOAA Climate Data Record (CDR) Program for satellites (source data)";
    String project "Group for High Resolution Sea Surface Temperature (source data)";
    String publisher_email "erd.data@noaa.gov";
    String publisher_institution "NOAA NMFS SWFSC ERD, NOAA CoastWatch West Coast";
    String publisher_name "NOAA NMFS SWFSC ERD, NOAA CoastWatch West Coast";
    String publisher_type "institution";
    String publisher_url "https://coastwatch.pfeg.noaa.gov";
    String references "https://pathfinder.nodc.noaa.gov and Casey, K.S., T.B. Brandon, P. Cornillon, and R. Evans: The Past, Present and Future of the AVHRR Pathfinder SST Program, in Oceanography from Space: Revisited, eds. V. Barale, J.F.R. Gower, and L. Alberotanza, Springer, 2010. DOI: 10.1007/978-90-481-8681-5_16.";
    String sea_name "World-Wide Distribution";
    String source "Satellite observations from GAC AVHRR using version 5.3 of the Pathfinder algorithm";
    String sourceUrl "(local files)";
    Float32 southernmost_latitude -90.0;
    Float64 Southernmost_Northing -89.97916;
    String spatial_resolution "0.0416667 degree";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "This dataset contains monthly composites of daytime sea surface temperature (SST) data produced as part of the AVHRR Pathfinder SST Project. The source data were created using Version 5.3 of the Pathfinder algorithm and the file is nearly but not completely compliant with the GHRSST Data Specifications V2.0 (GDS2). Source data were created by the NOAA National Centers for Environmental Information (NCEI). Multi-day composites were created by NOAA CoastWatch-West Coast and NOAA/SWFSC/ERD.";
    String time_coverage_duration "P1M";
    String time_coverage_end "2018-12-17T00:00:00Z";
    String time_coverage_resolution "P1M";
    String time_coverage_start "1981-09-16T00:00:00Z";
    String title "SST, Pathfinder Ver 5.3 (L3C), Day, Global, 0.0417°, 1981-present, Science Quality (Monthly Composite)";
    Float64 Westernmost_Easting -179.9792;
    Float32 westernmost_longitude -180.0;
  }
}

 

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its projection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.


 
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