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  <ncml:attribute name="acknowledgement" value="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)." />
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  <ncml:attribute name="creator_email" value="Alex.Ignatov@noaa.gov" />
  <ncml:attribute name="creator_name" value="Alex Ignatov" />
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  <ncml:attribute name="history" value="Created by the L2-to-L3 conversion tool,  which was developed and provided by NOAA/NESDIS/STAR and CCNY. The version is 4.6.9" />
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  <ncml:attribute name="keywords" value="Oceans &gt; Ocean Temperature &gt; Sea Surface Temperature" />
  <ncml:attribute name="keywords_vocabulary" value="NASA Global Change Master Directory (GCMD) Science Keywords" />
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  <ncml:attribute name="publisher_name" value="The GHRSST Project Office" />
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  <ncml:attribute name="references" value="Data convention: GHRSST Data Specification (GDS) v2.0. Algorithms: ACSPO-MODIS ATBD (NOAA/NESDIS/STAR)" />
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      <attribute name="date" value="2023-07-23T10:43:34Z" type="modified" />
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  <ncml:variable name="sea_surface_temperature" shape="time lat lon" type="float">
    <ncml:attribute name="comment" value="SST obtained by regression with buoy measurements, sensitive to skin SST. Further information at (Petrenko et al., JGR, 2014; doi:10.1002/2013JD020637)&#xA;                        " />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="sea surface sub-skin temperature" />
    <ncml:attribute name="source" value="NOAA" />
    <ncml:attribute name="units" value="kelvin" />
    <ncml:attribute name="standard_name" value="sea_surface_subskin_temperature" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="physicalMeasurement" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="sses_bias" shape="time lat lon" type="float">
    <ncml:attribute name="comment" value="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)" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="SSES bias estimate" />
    <ncml:attribute name="units" value="kelvin" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="sses_standard_deviation" shape="time lat lon" type="float">
    <ncml:attribute name="comment" value="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)" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="SSES standard deviation" />
    <ncml:attribute name="units" value="kelvin" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="l2p_flags" shape="time lat lon" type="short">
    <ncml:attribute name="valid_min" type="short" value="-32768" />
    <ncml:attribute name="valid_max" type="short" value="32767" />
    <ncml:attribute name="long_name" value="L2P flags" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="flag_meanings" value="microwave land ice invalid_radiance daytime land twilight_degradation sunglint ice SST_not_valid_or_degraded not_water" />
    <ncml:attribute name="flag_masks" type="short" value="1 2 4 256 512 1024 2048 4096 8192 16384 -32768" />
    <ncml:attribute name="comment" value="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 &quot;twilight&quot; 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&lt;5)); bit16 (0=water (ocean, lake, river); 1=not_water (land, ice, invalid))" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="l3s_flags" shape="time lat lon" type="short">
    <ncml:attribute name="_FillValue" type="short" value="-32768" />
    <ncml:attribute name="valid_min" type="short" value="-32767" />
    <ncml:attribute name="valid_max" type="short" value="32767" />
    <ncml:attribute name="long_name" value="L3S flags" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="flag_meanings" value="LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D" />
    <ncml:attribute name="flag_masks" type="byte" value="1 2 4 8" />
    <ncml:attribute name="comment" value="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)" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="thematicClassification" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="sst_count" shape="time lat lon" type="byte">
    <ncml:attribute name="_FillValue" type="byte" value="-128" />
    <ncml:attribute name="valid_min" type="byte" value="0" />
    <ncml:attribute name="valid_max" type="byte" value="127" />
    <ncml:attribute name="long_name" value="Count of input L3U SST pixels" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="comment" value="Number of L3U pixels contributing to L3S pixel" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="referenceInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="quality_level" shape="time lat lon" type="byte">
    <ncml:attribute name="_FillValue" type="byte" value="-128" />
    <ncml:attribute name="valid_min" type="byte" value="0" />
    <ncml:attribute name="valid_max" type="byte" value="5" />
    <ncml:attribute name="long_name" value="quality level of SST pixel" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="flag_meanings" value="no_data bad_data not_used not_used not_used best_quality" />
    <ncml:attribute name="flag_values" type="short" value="0 1 2 3 4 5" />
    <ncml:attribute name="comment" value="SST quality levels: 5 corresponds to “clear-sky” pixels and is recommended for operational applications and validation." />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="sst_source" shape="time lat lon" type="byte">
    <ncml:attribute name="_FillValue" type="byte" value="-128" />
    <ncml:attribute name="valid_min" type="byte" value="0" />
    <ncml:attribute name="valid_max" type="byte" value="3" />
    <ncml:attribute name="long_name" value="Source of major (highest weight) contribution to sst" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="flag_meanings" value="LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D" />
    <ncml:attribute name="flag_values" type="byte" value="0 1 2 3" />
    <ncml:attribute name="comment" value="Major contributor to SST. The major contributor is defined as the L3S-LEO product with highest weighed l3s-daily observation." />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="satellite_zenith_angle" shape="time lat lon" type="float">
    <ncml:attribute name="units" value="degrees" />
    <ncml:attribute name="height" value="10 m" />
    <ncml:attribute name="comment" value="Satellite zenith angle corresponding to L3S-LEO SST measurement with highest weight." />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="satellite zenith angle" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="referenceInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="dt_analysis" shape="time lat lon" type="float">
    <ncml:attribute name="comment" value="Deviation from reference SST, i.e., dt_analysis = SST - reference SST" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="deviation from SST reference" />
    <ncml:attribute name="units" value="kelvin" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="source" value="20190215120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="sea_ice_fraction" shape="time lat lon" type="float">
    <ncml:attribute name="comment" value="Fractional sea ice cover" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="sea ice fraction" />
    <ncml:attribute name="standard_name" value="sea_ice_area_fraction" />
    <ncml:attribute name="units" value="1" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="qualityInformation" />
    <ncml:attribute name="source" value="20190215120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="wind_speed" shape="time lat lon" type="float">
    <ncml:attribute name="units" value="m s-1" />
    <ncml:attribute name="height" value="10 m" />
    <ncml:attribute name="comment" value="Typically represents surface winds (10 meters above the sea surface). The wind speeds reported here are a daily mean value." />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="long_name" value="wind speed" />
    <ncml:attribute name="standard_name" value="wind_speed" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="auxiliaryInformation" />
    <ncml:attribute name="source" value="MERRA2 tavg1_2d_ocn_Nx: 2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Ocean Surface Diagnostics" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="sst_dtime" shape="time lat lon" type="float">
    <ncml:attribute name="long_name" value="time difference from reference time" />
    <ncml:attribute name="units" value="seconds" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="comment" value="time plus sst_dtime gives seconds since 1981-01-01 00:00:00 UTC" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="referenceInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1500 3000" />
  </ncml:variable>
  <ncml:variable name="measurement_dtime" shape="time lat lon" type="float">
    <ncml:attribute name="long_name" value="time difference of highest weighted input SST from reference time. Is equal to sst_dtime for pixels where L3S-LEO-PM_N is available" />
    <ncml:attribute name="units" value="seconds" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="comment" value="time plus measurement_dtime gives seconds since 1981-01-01 00:00:00 UTC" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="coverage_content_type" value="referenceInformation" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1500 3000" />
  </ncml:variable>
  <ncml:variable name="crs" shape="" type="int">
    <ncml:attribute name="prime_meridian_name" value="Greenwich" />
    <ncml:attribute name="long_name" value="coordinate reference system" />
    <ncml:attribute name="grid_mapping_name" value="latitude_longitude" />
    <ncml:attribute name="horizontal_datum_name" value="World Geodetic System 1984" />
    <ncml:attribute name="reference_ellipsoid_name" value="WGS84" />
    <ncml:attribute name="_CoordinateTransformType" value="Projection" />
    <ncml:attribute name="_CoordinateAxisTypes" value="GeoX GeoY" />
  </ncml:variable>
  <ncml:variable name="sst_gradient_magnitude" shape="time lat lon" type="float">
    <ncml:attribute name="long_name" value="SST gradient magnitude value" />
    <ncml:attribute name="comment" value="Gradient magnitude calculated from SST field in all grids with valid SST" />
    <ncml:attribute name="coverage_content_type" value="physicalMeasurement" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="units" value="kelvin/km" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 1800 3600" />
  </ncml:variable>
  <ncml:variable name="sst_front_position" shape="time lat lon" type="byte">
    <ncml:attribute name="_FillValue" type="byte" value="-128" />
    <ncml:attribute name="comment" value="Binary indicator of SST front position in the valid SST clear-sky domain: 1 - SST front present, 0 - no front present" />
    <ncml:attribute name="coverage_content_type" value="image" />
    <ncml:attribute name="coordinates" value="lon lat" />
    <ncml:attribute name="grid_mapping" value="crs" />
    <ncml:attribute name="long_name" value="Binary SST front position indicator" />
    <ncml:attribute name="valid_min" type="byte" value="0" />
    <ncml:attribute name="valid_max" type="byte" value="1" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1 2250 4500" />
  </ncml:variable>
  <ncml:variable name="lat" shape="lat" type="float">
    <ncml:attribute name="long_name" value="latitude" />
    <ncml:attribute name="comment" value="Latitudes for locating data" />
    <ncml:attribute name="units" value="degrees_north" />
    <ncml:attribute name="axis" value="Y" />
    <ncml:attribute name="valid_min" type="float" value="-90.0" />
    <ncml:attribute name="valid_max" type="float" value="90.0" />
    <ncml:attribute name="standard_name" value="latitude" />
    <ncml:attribute name="coverage_content_type" value="coordinate" />
    <ncml:attribute name="_ChunkSizes" type="int" value="9000" />
    <ncml:attribute name="_CoordinateAxisType" value="Lat" />
  </ncml:variable>
  <ncml:variable name="lon" shape="lon" type="float">
    <ncml:attribute name="long_name" value="longitude" />
    <ncml:attribute name="comment" value="Longitude for locating data" />
    <ncml:attribute name="units" value="degrees_east" />
    <ncml:attribute name="axis" value="X" />
    <ncml:attribute name="valid_min" type="float" value="-180.0" />
    <ncml:attribute name="valid_max" type="float" value="180.0" />
    <ncml:attribute name="standard_name" value="longitude" />
    <ncml:attribute name="coverage_content_type" value="coordinate" />
    <ncml:attribute name="_ChunkSizes" type="int" value="18000" />
    <ncml:attribute name="_CoordinateAxisType" value="Lon" />
  </ncml:variable>
  <ncml:variable name="time" shape="time" type="int">
    <ncml:attribute name="long_name" value="reference time of sst file" />
    <ncml:attribute name="units" value="seconds since 1981-01-01 00:00:00" />
    <ncml:attribute name="comment" value="seconds since 1981-01-01 00:00:00" />
    <ncml:attribute name="standard_name" value="time" />
    <ncml:attribute name="calendar" value="Gregorian" />
    <ncml:attribute name="axis" value="T" />
    <ncml:attribute name="coverage_content_type" value="coordinate" />
    <ncml:attribute name="_ChunkSizes" type="int" value="1" />
    <ncml:attribute name="_CoordinateAxisType" value="Time" />
  </ncml:variable>
</ncml:netcdf>

