Make A Graph

Dataset Title:	Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal Fronts Reanalysis, 2012-present, Daily (L3S-LEO degrees C)
Institution:	NOAA/NESDIS/STAR (Dataset ID: noaacwLEOACSPOSSTL3SCDaily)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

latitude (degrees_north)

longitude (degrees_east)

Graph Settings
Color Bar:	Continuity:	Scale:
Minimum:	Maximum:	N Sections:
Draw land mask:
Y Axis Minimum:	Maximum:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

[The graph you specified. Please be patient.]

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.513936e+8, 1.7091216e+9;
    String axis "T";
    String calendar "Gregorian";
    String comment "seconds since 1981-01-01 00:00:00";
    String coverage_content_type "coordinate";
    String ioos_category "Time";
    String long_name "reference time of sst file";
    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 -89.99, 89.99;
    String axis "Y";
    String comment "Latitudes for locating data";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    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 -179.99, 179.99;
    String axis "X";
    String comment "Longitude for locating data";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  sea_surface_temperature {
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 35.0;
    Float64 colorBarMinimum 0.0;
    String comment "SST obtained by regression with buoy measurements, sensitive to skin SST. Further information at (Petrenko et al., JGR, 2014; doi:10.1002/2013JD020637)";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Temperature";
    String long_name "sea surface sub-skin temperature";
    String source "NOAA";
    String standard_name "sea_surface_subskin_temperature";
    String units "degree_C";
    Float32 valid_max 40.0;
    Float32 valid_min -2.0;
  }
  sses_bias {
    Float32 _FillValue -275.198;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String comment "Bias is derived against Piecewise Regression SST produced by local regressions with buoys. Subtracting sses_bias from sea_surface_temperature produces more accurate estimate of SST at the depth of buoys. Further information at (Petrenko et al., JTECH, 2016; doi:10.1175/JTECH-D-15-0166.1)";
    String coverage_content_type "qualityInformation";
    String ioos_category "Statistics";
    String long_name "SSES bias estimate";
    String units "degree_C";
    Float32 valid_max -271.118;
    Float32 valid_min -275.182;
  }
  sses_standard_deviation {
    Float32 _FillValue -274.43;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String comment "Standard deviation of sea_surface_temperature from SST measured by drifting buoys. Further information at (Petrenko et al., JTECH, 2016; doi:10.1175/JTECH-D-15-0166.1)";
    String coverage_content_type "qualityInformation";
    String ioos_category "Statistics";
    String long_name "SSES standard deviation";
    String units "degree_C";
    Float32 valid_max -271.88;
    Float32 valid_min -274.42;
  }
  l2p_flags {
    Int16 _FillValue 32767;
    Float64 colorBarMaximum 0.0;
    Float64 colorBarMinimum -30000.0;
    String comment "L2P common flags in bits 1-3 and data provider flags (from ACSPO mask) in bits 9-16. For backwards compatibility with legacy reader software, the data provider flags (last 8 bits) contain redundant land and ice information that is also available in bits 2 and 3, respectively. Description of individual bits:  bit01 (0=IR: 1=microwave); bit02 (0=not_land; 1=land (from land-sea mask)); bit03 (0=not_ice; 1=ice (from first-guess L4 SST)); bits04-08 (reserved,set to 0); bit09 (0=valid_radiance; 1=invalid_radiance); bit10 (0=nighttime; 1=daytime); bit11 (0=not_land; 1=land (identical to bit02)); bit12 (0=good quality data; 1=twilight_degradation (degraded quality data due to \"twilight\" region)); bit13 (0=not_sunglint; 1=sunglint); bit14 (0=not_ice; 1=ice (identical to bit03)); bit15 (0=sst; 1=SST_not_valid_or_degraded (not_valid or degraded SST w/QL<5)); bit16 (0=water (ocean, lake, river); 1=not_water (land, ice, invalid))";
    String coverage_content_type "qualityInformation";
    Int16 flag_masks 1, 2, 4, 256, 512, 1024, 2048, 4096, 8192, 16384, -32768;
    String flag_meanings "microwave land ice invalid_radiance daytime land twilight_degradation sunglint ice SST_not_valid_or_degraded not_water";
    String ioos_category "Quality";
    String long_name "L2P flags";
    Int16 valid_max 32767;
    Int16 valid_min -32768;
  }
  l3s_flags {
    Int16 _FillValue -32768;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment "L3S-LEO data availability flags in bits 1-4 and bits 5-16 are reserved for future use. bit01 (0=L3S-LEO_PM_N unavailable: 1=L3S-LEO_PM_N available); bit02 (0=L3S-LEO_PM_D unavailable: 1=L3S-LEO_PM_D available); bit03 (0=L3S-LEO_AM_N unavailable: 1=L3S-LEO_AM_N available); bit04 (0=L3S-LEO_AM_D unavailable: 1=L3S-LEO_AM_D available)";
    String coverage_content_type "thematicClassification";
    Byte flag_masks 1, 2, 4, 8;
    String flag_meanings "LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D";
    String ioos_category "Quality";
    String long_name "L3S flags";
    Int16 valid_max 32767;
    Int16 valid_min -32767;
  }
  sst_count {
    Byte _FillValue -128;
    String _Unsigned "false";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "Number of L3U pixels contributing to L3S pixel";
    String coverage_content_type "referenceInformation";
    String ioos_category "Statistics";
    String long_name "Count of input L3U SST pixels";
    Byte valid_max 127;
    Byte valid_min 0;
  }
  quality_level {
    Byte _FillValue -128;
    String _Unsigned "false";
    Float64 colorBarMaximum 6.0;
    Float64 colorBarMinimum 0.0;
    String comment "SST quality levels: 5 corresponds to “clear-sky” pixels and is recommended for operational applications and validation.";
    String coverage_content_type "qualityInformation";
    String flag_meanings "no_data bad_data not_used not_used not_used best_quality";
    Int16 flag_values 0, 1, 2, 3, 4, 5;
    String ioos_category "Quality";
    String long_name "quality level of SST pixel";
    Byte valid_max 5;
    Byte valid_min 0;
  }
  sst_source {
    Byte _FillValue -128;
    String _Unsigned "false";
    Float64 colorBarMaximum 4.0;
    Float64 colorBarMinimum 0.0;
    String comment "Major contributor to SST. The major contributor is defined as the L3S-LEO product with highest weighed l3s-daily observation.";
    String coverage_content_type "qualityInformation";
    String flag_meanings "LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D";
    Byte flag_values 0, 1, 2, 3;
    String ioos_category "Temperature";
    String long_name "Source of major (highest weight) contribution to sst";
    Byte valid_max 3;
    Byte valid_min 0;
  }
  satellite_zenith_angle {
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Satellite zenith angle corresponding to L3S-LEO SST measurement with highest weight.";
    String coverage_content_type "referenceInformation";
    String height "10 m";
    String ioos_category "Unknown";
    String long_name "satellite zenith angle";
    String units "degrees";
    Float32 valid_max 327.67;
    Float32 valid_min -327.67;
  }
  dt_analysis {
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum -5.0;
    String comment "Deviation from reference SST, i.e., dt_analysis = SST - reference SST";
    String coverage_content_type "qualityInformation";
    String ioos_category "Statistics";
    String long_name "deviation from SST reference";
    String source "20240204120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc";
    String units "kelvin";
    Float32 valid_max 327.67;
    Float32 valid_min -327.67;
  }
  sea_ice_fraction {
    Float32 _FillValue -1.28;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "Fractional sea ice cover";
    String coverage_content_type "qualityInformation";
    String ioos_category "Ice Distribution";
    String long_name "sea ice fraction";
    String source "20240204120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc";
    String standard_name "sea_ice_area_fraction";
    String units "1";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  wind_speed {
    Float32 _FillValue -0.15;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String comment "Typically represents surface winds (10 meters above the sea surface). The wind speeds reported here are a daily mean value.";
    String coverage_content_type "auxiliaryInformation";
    String height "10 m";
    String ioos_category "Wind";
    String long_name "wind speed";
    String source "MERRA2 tavg1_2d_ocn_Nx: 2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Ocean Surface Diagnostics";
    String standard_name "wind_speed";
    String units "m s-1";
    Float32 valid_max 38.1;
    Float32 valid_min 0.0;
  }
  sst_dtime {
    Float32 _FillValue -5.3687091e+8;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum -10.0;
    String comment "time plus sst_dtime gives seconds since 1981-01-01 00:00:00 UTC";
    String coverage_content_type "referenceInformation";
    String ioos_category "Temperature";
    String long_name "time difference from reference time";
    String units "seconds";
    Float32 valid_max 5.3687091e+8;
    Float32 valid_min -5.3687091e+8;
  }
  measurement_dtime {
    Float32 _FillValue -5.3687091e+8;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum -10.0;
    String comment "time plus measurement_dtime gives seconds since 1981-01-01 00:00:00 UTC";
    String coverage_content_type "referenceInformation";
    String ioos_category "Temperature";
    String long_name "time difference of highest weighted input SST from reference time. Is equal to sst_dtime for pixels where L3S-LEO-PM_N is available";
    String units "seconds";
    Float32 valid_max 5.3687091e+8;
    Float32 valid_min -5.3687091e+8;
  }
  sst_gradient_magnitude {
    Float32 _FillValue -32.768;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum -40.0;
    String comment "Gradient magnitude calculated from SST field in all grids with valid SST";
    String ioos_category "Temperature";
    String long_name "SST gradient magnitude value";
    String units "kelvin/km";
    Float32 valid_max 32.767;
    Float32 valid_min -32.767;
  }
  sst_front_position {
    Byte _FillValue -128;
    String _Unsigned "false";
    Float64 colorBarMaximum 1.5;
    Float64 colorBarMinimum 0.0;
    String comment "Binary indicator of SST front position in the valid SST clear-sky domain: 1 - SST front present, 0 - no front present";
    String ioos_category "Temperature";
    String long_name "Binary SST front position indicator";
    Byte valid_max 1;
    Byte valid_min 0;
  }
  NC_GLOBAL {
    String acknowledgement "Please acknowledge the use of these data with the following statement: These data were provided by Group for High Resolution Sea Surface Temperature (GHRSST) and the National Oceanic and Atmospheric Administration (NOAA).";
    String aggregator_version "V1.00";
    String cdm_data_type "Grid";
    Int32 col_count 18000;
    Int32 col_start 0;
    String collation_version "2.11.0";
    String comment "SSTs are a weighted average of the SSTs of contributing pixels. WARNING: some applications are unable to properly handle signed byte values. If byte values > 127 are encountered, subtract 256 from this reported value.";
    String Conventions "CF-1.7, ACDD-1.3, COARDS";
    String creator_email "Alex.Ignatov@noaa.gov";
    String creator_name "Alex Ignatov";
    String creator_type "person";
    String creator_url "http://www.star.nesdis.noaa.gov";
    String date_created "2022-09-03T06:02:56Z";
    String day_or_night "both";
    Float64 Easternmost_Easting 179.99;
    String gds_version_id "02.0";
    Float64 geospatial_lat_max 89.99;
    Float64 geospatial_lat_min -89.99;
    Float64 geospatial_lat_resolution 0.02;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.99;
    Float64 geospatial_lon_min -179.99;
    Float64 geospatial_lon_resolution 0.02;
    String geospatial_lon_units "degrees_east";
    String grid_mapping_horizontal_datum_name "World Geodetic System 1984";
    String grid_mapping_long_name "coordinate reference system";
    String grid_mapping_name "latitude_longitude";
    String grid_mapping_prime_meridian_name "Greenwich";
    String grid_mapping_reference_ellipsoid_name "WGS84";
    String history 
"Created by the L2-to-L3 conversion tool,  which was developed and provided by NOAA/NESDIS/STAR and CCNY. The version is 4.9.0
2024-04-19T11:36:19Z (local files)
2024-04-19T11:36:19Z http://coastwatch.pfeg.noaa.gov/griddap/noaacwLEOACSPOSSTL3SCDaily.das";
    String id "L3S_LEO_DY-STAR-v2.81";
    String infoUrl "http://www.star.nesdis.noaa.gov";
    String institution "NOAA/NESDIS/STAR";
    String instrument "AVHRR,VIIRS";
    String keywords "angle, area, atmosphere, atmospheric, available, bias, binary, contribution, count, cryosphere, data, deviation, difference, distribution, dt_analysis, dtime, 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, equal, error, estimate, extent, flags, fraction, front, gradient, highest, ice, ice distribution, indicator, information, input, l2p, l2p_flags, l3s, l3s-leo-pm, l3s_flags, l3u, leo, level, magnitude, major, measurement_dtime, national, nesdis, noaa, ocean, oceans, office, pixel, pixels, position, produced, quality, quality_level, reference, retrievals, satellite, satellite_zenith_angle, science, sea, sea_ice_area_fraction, sea_ice_fraction, sea_surface_subskin_temperature, sea_surface_temperature, sensor, service, single, skin, source, speed, sses, sses_bias, sses_standard_deviation, sst, sst_count, sst_dtime, sst_front_position, sst_gradient_magnitude, sst_source, standard, star, statistics, sub, sub-skin, subskin, surface, temperature, time, value, weight, weighted, where, wind, wind_speed, winds, zenith";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "GHRSST protocol describes data use as free and open";
    String metadata_link "https://cmr.earthdata.nasa.gov/search/concepts/C2805339147-POCLOUD";
    String naming_authority "org.ghrsst";
    Float64 Northernmost_Northing 89.99;
    String platform "MetOp-B,MetOp-C,N20,N21,NPP";
    String preprocessor_version "1.17.0";
    String processing_level "L3S";
    String product_version "L2 algorithm V2.80; L3 algorithm V4.9.0";
    String project "Group for High Resolution Sea Surface Temperature";
    String publisher_email "ghrsst-po@nceo.ac.uk";
    String publisher_name "The GHRSST Project Office";
    String publisher_type "group";
    String publisher_url "https://www.ghrsst.org";
    String references "Data convention: GHRSST Data Specification (GDS) v2.0. Algorithms: ACSPO-VIIRS ATBD (NOAA/NESDIS/STAR)";
    Int32 row_count 9000;
    Int32 row_start 0;
    String sensor "AVHRR,VIIRS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.99;
    String spatial_resolution "0.02 deg";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Sea surface temperature retrievals produced by NOAA/NESDIS/STAR office";
    String testOutOfDate "now-95days";
    String time_coverage_end "2024-02-28T12:00:00Z";
    String time_coverage_start "2000-02-24T12:00:00Z";
    String title "Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal Fronts Reanalysis, 2012-present, Daily (L3S-LEO degrees C)";
    Float64 Westernmost_Easting -179.99;
  }
}

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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.