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Dataset Title:  NOAA Global Coral Bleaching Monitoring Products: Daily 5-km Subscribe RSS
Institution:  NOAA Coral Reef Watch   (Dataset ID: NOAA_DHW_5km)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
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Y Axis:  ?
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time (UTC) ?     specify just 1 value →
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longitude (degrees_east) ?
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    Int32 _ChunkSizes 1;
    String _CoordinateAxisType "Time";
    Float64 actual_range 4.806e+8, 1.5684624e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    String ioos_category "Time";
    String long_name "reference time of the daily bleaching alert area field";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    Int32 _ChunkSizes 3600;
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.975, 89.975;
    String axis "Y";
    String comment "equirectangular projection and grid centers";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 89.975;
    Float32 valid_min -89.975;
  }
  longitude {
    Int32 _ChunkSizes 7200;
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.975, 179.975;
    String axis "X";
    String comment "equirectangular projection and grid centers";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 179.975;
    Float32 valid_min -179.975;
  }
  CRW_DHW {
    Int32 _ChunkSizes 1, 1557, 3114;
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 16.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "degree heating week";
    String units "Celsius weeks";
    Float32 valid_max 100.0;
    Float32 valid_min 0.0;
  }
  CRW_HOTSPOT {
    Int32 _ChunkSizes 1, 1200, 2400;
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "coral bleaching hotspot";
    String units "Celsius";
    Float32 valid_max 15.0;
    Float32 valid_min -15.0;
  }
  CRW_BAA {
    Int32 _ChunkSizes 1, 1800, 3600;
    Byte _FillValue -5;
    Float64 colorBarMaximum 4.0;
    Float64 colorBarMinimum 0.0;
    String comment "Bleaching Alert Area (BAA) values are coral bleaching heat stress levels: 0 - No Stress; 1 - Bleaching Watch; 2 - Bleaching Warning; 3 - Bleaching Alert Level 1; 4 - Bleaching Alert Level 2. Product description is provided at https://coralreefwatch.noaa.gov/product/5km/index.php.";
    String coverage_content_type "thematicClassification";
    String flag_meanings "no_stress watch warning alert_level1 alert_level2";
    String flag_values "0, 1, 2, 3, 4";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "bleaching alert area (7-day max)";
    String units "1";
    Byte valid_max 4;
    Byte valid_min 0;
  }
  CRW_SST {
    Int32 _ChunkSizes 1, 1200, 2400;
    Float64 _FillValue -327.68;
    Float64 colorBarMaximum 34.0;
    Float64 colorBarMinimum -2.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "sea surface temperature";
    String standard_name "sea_surface_temperature";
    String units "Celsius";
    Float64 valid_max 50.0;
    Float64 valid_min -2.0;
  }
  CRW_SSTANOMALY {
    Int32 _ChunkSizes 1, 1200, 2400;
    Float32 _FillValue -327.68;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum -5.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "sea surface temperature anomaly";
    String units "Celsius";
    Float32 valid_max 15.0;
    Float32 valid_min -15.0;
  }
  NC_GLOBAL {
    String acknowledgement "NOAA Coral Reef Watch";
    String cdm_data_type "Grid";
    String comment "This is a product of the NOAA Coral Reef Watch Daily Global 5km Satellite Coral Bleaching Heat Stress Monitoring Product Suite Version 3.1, derived from CoralTemp v1.0.";
    String contributor_name "C. Mark Eakin";
    String contributor_role "Coordinator, NOAA Coral Reef Watch";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "coralreefwatch@noaa.gov";
    String creator_institution "National Oceanic and Atmospheric Administration (NOAA)";
    String creator_name "NOAA Coral Reef Watch";
    String creator_type "institution";
    String creator_url "http://coralreefwatch.noaa.gov";
    String date_created "2017-05-19";
    String date_issued "2017-05-19";
    String date_metadata_modified "2018-11-14";
    String date_modified "2018-11-14";
    Float64 Easternmost_Easting 179.975;
    String geospatial_bounds "POLYGON ((-90 -180, 90 -180, 90 180, -90 180, -90 -180))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 89.975;
    Float64 geospatial_lat_min -89.975;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.975;
    Float64 geospatial_lon_min -179.975;
    String geospatial_lon_units "degrees_east";
    String history 
"Data obtained from NOAA Coral Reef Watch and re-distributed via THREDDS Data Server (TDS) at the Pacific Islands Ocean Observing System (PacIOOS) to provide temporal aggregation and distribution through NetCDF/OPeNDAP utilities like Godiva2, Live Access Server (LAS), and ERDDAP (05/2017), Upgraded data stream from v3.0 to v3.1, which also extends start date from 2013-06-03 back to 1985-03-25 (11/2018)
2019-09-16T11:01:41Z http://localhost:8080/thredds/dodsC/hioos/satellite/dhw_5km
2019-09-16T11:01:41Z http://oos.soest.hawaii.edu/griddap/NOAA_DHW_5km.das";
    String id "dhw_5km";
    String infoUrl "http://coralreefwatch.noaa.gov/satellite/";
    String institution "NOAA Coral Reef Watch";
    String instrument "Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > AHI > Advanced Himawari Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > AVHRR > Advanced Very High Resolution Radiometer, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > GOES-13 Imager > Geostationary Operational Environmental Satellite 13-Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > GOES-15 Imager > Geostationary Operational Environmental Satellite 15-Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > SEVIRI > Spinning Enhanced Visible and Infrared Imager, Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > VIIRS > Visible-Infrared Imager-Radiometer Suite";
    String instrument_vocabulary "GCMD Instrument Keywords";
    String ISO_Topic_Categories "biota, oceans";
    String keywords "Earth Science > Oceans > Coastal Processes > Coral Reefs, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The data produced by Coral Reef Watch are available for use without restriction, but Coral Reef Watch relies on the ethics and integrity of the user to ensure that the source of the data and products is appropriately cited and credited. When using these data and products, credit and courtesy should be given to NOAA Coral Reef Watch. Please include the appropriate DOI associated with this dataset in the citation. For more information, visit the NOAA Coral Reef Watch website: https://coralreefwatch.noaa.gov. Recommendations for citing and providing credit are provided at https://coralreefwatch.noaa.gov/satellite/docs/recommendations_crw_citation.php. Users are referred to the footer section of the Coral Reef Watch website (https://coralreefwatch.noaa.gov/index.php) for disclaimers, policies, notices pertaining to the use of the data.";
    String locations "Geographic Region > Global Ocean";
    String locations_vocabulary "GCMD Location Keywords";
    String Metadata_Link "https://www.pacioos.hawaii.edu/metadata/dhw_5km.html";
    String naming_authority "org.pacioos";
    Float64 Northernmost_Northing 89.975;
    String platform "Earth Observation Satellites > GOES (Geostationary Operational Environmental Satellite) > GOES-13, Earth Observation Satellites > GOES (Geostationary Operational Environmental Satellite) > GOES-15, Earth Observation Satellites > Himawari > Himawari Meteorological Satellites, Earth Observation Satellites > Joint Polar Satellite System (JPSS) > SUOMI-NPP > Suomi National Polar-orbiting Partnership, Earth Observation Satellites > METEOSAT > METEOSAT-8, Earth Observation Satellites > METEOSAT > METEOSAT-11, Earth Observation Satellites > METOP > METOP-B > Meteorological Operational Satellite - B";
    String platform_vocabulary "GCMD Platform Keywords";
    String processing_level "Level 4";
    String product_version "3.1";
    String program "NOAA Coral Reef Watch";
    String project "NOAA Coral Reef Watch";
    String publisher_email "info@pacioos.org";
    String publisher_institution "University of Hawaii";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_type "group";
    String publisher_url "http://www.pacioos.hawaii.edu";
    String references "http://coralreefwatch.noaa.gov/satellite/";
    String source "satellite data";
    String sourceUrl "http://localhost:8080/thredds/dodsC/hioos/satellite/dhw_5km";
    Float64 Southernmost_Northing -89.975;
    String standard_name_vocabulary "CF Standard Name Table v39";
    String summary "Contains a suite of NOAA Coral Reef Watch (CRW) version 3.1 operational global satellite coral bleaching thermal stress monitoring products at 5-km resolution produced daily in near real-time, including sea surface temperature (SST), SST anomaly, HotSpot, Degree Heating Week (DHW), and a 7-day maximum Bleaching Alert Area (BAA). These data are based on CoralTemp Version 1.0, a daily global 5-km sea surface temperature dataset combined from: (1.) NOAA/NESDIS operational near-real-time daily global 5-km geostationary-polar-orbiting (geo-polar) blended night-only SST analysis, (2.) NOAA/NESDIS 2002-2016 reprocessed daily global 5-km geo-polar blended night-only SST analysis, and (3.) United Kingdom Met Office 1985-2002 daily global 5-km night-only SST reanalysis of Operational SST and Sea Ice Analysis (OSTIA). The SST anomaly is the difference of SST compared to daily SST climatology. The coral bleaching HotSpot is a special type of sea surface temperature (SST) anomaly and shows the difference of SST compared to a coral bleaching SST threshold climatology. DHW is the accumulation of Coral Bleaching HotSpots over a period of 12 consecutive weeks. The DHW value at any particular location at any particular time is the summation of the product of HotSpot values which are at least 1 deg C above the bleaching threshold SST and their durations in weeks over the most recent 12-week period. One DHW is equivalent to 1 week of SST at 1 deg C above the threshold or 0.5 week of SST at 2 deg C above the threshold, etc.  The units for DHW are deg C-weeks, combining the intensity and duration of thermal stress into one single number. Based on research at Coral Reef Watch, when the thermal stress reaches 4 deg C-weeks, you can expect to see significant coral bleaching, especially in more sensitive species. When thermal stress is 8 deg C-weeks or higher, you would likely see widespread bleaching and mortality from the thermal stress.";
    String testOutOfDate "now-60hours";
    String time_coverage_duration "P1D";
    String time_coverage_end "2019-09-14T12:00:00Z";
    String time_coverage_resolution "P1D";
    String time_coverage_start "1985-03-25T12:00:00Z";
    String title "NOAA Global Coral Bleaching Monitoring Products: Daily 5-km";
    Float64 Westernmost_Easting -179.975;
  }
}

 

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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