Maldives-Male Sea Surface Temperature and Degree Heating Week Time Series Charts - NOAA Twice-Weekly Near-Real-Time 50 km Satellite Nighttime AVHRR

Metadata also available as - [Outline]

Frequently-anticipated questions:

What does this data set describe?

Title:
Maldives-Male Sea Surface Temperature and Degree Heating Week Time Series Charts - NOAA Twice-Weekly Near-Real-Time 50 km Satellite Nighttime AVHRR
Abstract:
These web-posted charts show NOAA Coral Reef Watch (CRW)'s satellite sea surface temperature (SST) time series and coral bleaching Degree Heating Weeks (DHW) time series at a representative satellite pixel location for Maldives-Male coral reefs. In each chart, the corresponding thermal condition related to coral bleaching is color-coded based on a CRW standard and plotted below the time series. The time series were extracted from CRW's twice-weekly near-real-time 50 km satellite global nighttime AVHRR SSTs and SST derived DHWs. DHW product is one of CRW's near-real-time satellite coral bleaching monitoring products. DHW, in units of degree Celsius-weeks, are the accumulation of bleaching HotSpot anomalies during the previous 12 weeks whenever the SST equals or exceeds the coral bleaching threshold SST at the pixel. Bleaching HotSpots are SST anomalies exceeding the maximum monthly mean SST (shorten as MMMSST). The MMMSST is the maximum of twelve monthly mean SST climatology values, and the Coral Bleaching Threshold SST is defined as the MMMSST plus one degree Celsius. The MMMSST is location-specific. The time series cover a time period from Dec 2000 through the most recent twice-weekly time period up to near-real-time. Satellite data from the Advanced Very High Resolution Radiometer (AVHRR) on NOAA's Polar Orbiting Environmental Satellite (POES) are used to generate AVHRR SST. The near-real-time global SST data and bleaching DHW data and the time series charts for Maldives-Male coral reefs are produced twice-weekly on every Tuesday (using AVHRR data from the previous Saturday through Monday) and on every Saturday (using AVHRR data from the previous Tuesday through Friday).
Supplemental_Information:
These time series are extracted from global SST and DHW data which are displayed at <http://coralreefwatch.noaa.gov/satellite/current/key_sst_50km_field.html> <http://www.osdpd.noaa.gov/PSB/EPS/SST/dhw_retro.html>
  1. How should this data set be cited?

    NOAA Coral Reef Watch, 20001201, Maldives-Male Sea Surface Temperature and Degree Heating Week Time Series Charts - NOAA Twice-Weekly Near-Real-Time 50 km Satellite Nighttime AVHRR: NOAA Coral Reef Watch, Silver Spring, Maryland, USA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 72.0
    East_Bounding_Coordinate: 72.0
    North_Bounding_Coordinate: 4.0
    South_Bounding_Coordinate: 4.0

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 01-Dec-2000
    Ending_Date: present
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: PNG images

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: location name
      This is a Point data set.

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    NOAA Coral Reef Watch
    c/o C. Mark Eakin, Coordinator, NOAA Coral Reef Watch
    NOAA E/RA31, SSMC1, Room 5308, 1335 East West Hwy
    Silver Spring, Maryland 20910-3226
    USA

    301-713-2857 x 109 (voice)
    301-713-3136 (FAX)
    coralreefwatch@noaa.gov, mark.eakin@noaa.gov

Why was the data set created?

The SST and DHW time series at selected locations, including Maldives-Male, were primarily developed for NOAA's Coral Reef Watch (CRW) from satellite data for both monitoring and assessment of coral bleaching. CRW's Other coral bleaching monitoring and assessment products include the SST anomalies, coral bleaching HotSpots, Degree Heating Weeks, Tropical Coral Bleaching Indices.

How was the data set created?

  1. From what previous works were the data drawn?

    NOAA CRW Near-Real-Time 50 km Satellite Global Nighttime AVHRR SSTs (source 1 of 2)
    NOAA Coral Reef Watch, 20000101, NOAA Coral Reef Watch Near-Real-Time 50 km Satellite Global Nighttime AVHRR Sea Surface Temperatures: NOAA Coral Reef Watch, Suitland, Maryland, USA.

    Type_of_Source_Media: Digital
    Source_Contribution:
    SST time series in the product were extracted from this source data.

    NOAA CRW Near-Real-Time 50 km Satellite Global Coral Bleaching Degree Heating Weeks (source 2 of 2)
    NOAA Coral Reef Watch NOAA/NESDIS, 20000101, NOAA Coral Reef Watch Near-Real-Time 50 km Satellite Global Coral Bleaching Degree Heating Weeks (Global): NOAA Coral Reef Watch, Suitland, Maryland, USA.

    Type_of_Source_Media: data file
    Source_Contribution: DHW time series in the product were extracted from this source.

  2. How were the data generated, processed, and modified?

    Date: not complete (process 1 of 1)
    Raw or Level 0, 1a, or 1b data from satellite sensors is processed to the product level and mapped. The SST and DHW time series are extracted from the global SST and DHW datasets at the geographic location of the satellite observations nearest the selected reef site and then visualized in the time series charts. The following references may be helpful to describe the data processing for the corresponding products. 1) Strong, A. E., C. S. Barrientos, C. Duda, and J. Sapper, 1997: Improved Satellite Technique for Monitoring Coral Reef Bleaching. Proc 8th International Coral Reef Symposium 2:1495-1498. Available also online at URL <http://www.osdpd.noaa.gov/PSB/EPS/SST/icrs_dud.html> 2) Liu, G., W. Skirving, and A.E. Strong. 2003. Remote sensing of sea surface temperatures during 2002 Barrier Reef coral bleaching. EOS, 84(15), 137-144. 3) Skirving, W.J., A.E. Strong, G. Liu, C. Liu, F. Arzayus, J. Sapper and E. Bayler, Extreme events and perturbations of coastal ecosystems: Sea surface temperature change and coral bleaching. Chapter 2 in Remote Sensing of Aquatic Coastal Ecosystem Processes, L.L. Richardson and E.F. LeDrew (Co-Eds), Kluwer publishers, January, 2006 4) The information for the AVHRR-derived sea surface temperature is described in the following user's guide. Goodrum G., K. B. Kidwell, and W. Winston, 2000, NOAA KLM USER'S GUIDE. U.S. Department of Commerce, National Oceanic and Atmospheric Administration National Environmental Satellite, Data, and Information Service, National Climatic Data Center, Climate Services Division, Satellite Services Branch, FOB3, Room G227, E/CC33, 5200 Auth Road, Suitland, MD 20746-4304, USA. This manual is available on line at <http://www2.ncdc.noaa.gov/docs/klm/cover.htm>. To request additional information contact: Telephone: (828) 271-4850, Telefax: (828) 271-4876, Email: satorder@ncdc.noaa.gov.

    Person who carried out this activity:

    NOAA Coral Reef Watch
    c/o C. Mark Eakin, Coordinator, NOAA Coral Reef Watch
    NOAA E/RA31, SSMC1, Room 5308, 1335 East West Hwy
    Silver Spring, Maryland 20910-3226
    USA

    301-713-2857 x 109 (voice)
    301-713-3136 (FAX)
    coralreefwatch@noaa.gov, mark.eakin@noaa.gov

    Data sources used in this process:
    • NOAA CRW Near-Real-Time 50 km Satellite Global Nighttime Sea Surface Temperature Fields
    • NOAA CRW Near-Real-Time 50 km Satellite Global Coral Bleaching Degree Heating Weeks

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Polar Orbiting Environmental Satellite (POES) AVHRR-SST values are accurate to within 0.5 degrees C and adjusted by in-situ information (buoys) to best-approximate SST at a depth of 1 meter. However, to provide a complete global coverage, estimation of SSTs at all pixels that are cloud covered may occasionally reduce the accuracy of SST at these pixels. The accuracy of the DHW depends on both SST and the SST climatology used for deriving DHW. No estimation on the accuracy of DHW has been done yet.

  2. How accurate are the geographic locations?

    Users are referred to the following guide. Goodrum G., K. B. Kidwell, and W. Winston, 2000, NOAA KLM USER'S GUIDE. U.S. Department of Commerce, National Oceanic and Atmospheric Administration National Environmental Satellite, Data, and Information Service, National Climatic Data Center, Climate Services Division, Satellite Services Branch, FOB3, Room G227, E/CC33, 5200 Auth Road, Suitland, MD 20746-4304, USA. This manual is available on line at <http://www2.ncdc.noaa.gov/docs/klm/cover.htm>. To request additional information contact: Telephone: (828) 271-4850, Telefax: (828) 271-4876, Email: satorder@ncdc.noaa.gov.

  3. How accurate are the heights or depths?

    none

  4. Where are the gaps in the data? What is missing?

    Selected references: 1) The information for the AVHRR-derived sea surface temperature is described in the following guide. Goodrum G., K. B. Kidwell, and W. Winston, 2000, NOAA KLM USER'S GUIDE. U.S. Department of Commerce, National Oceanic and Atmospheric Administration National Environmental Satellite, Data, and Information Service, National Climatic Data Center, Climate Services Division, Satellite Services Branch, FOB3, Room G227, E/CC33, 5200 Auth Road, Suitland, MD 20746-4304, USA. This manual is available on line at <http://www2.ncdc.noaa.gov/docs/klm/cover.htm>. To request additional information contact: Telephone: (828) 271-4850, Telefax: (828) 271-4876, Email: satorder@ncdc.noaa.gov. 2) Strong, A. E., C. S. Barrientos, C. Duda, and J. Sapper, 1997: Improved Satellite Technique for Monitoring Coral Reef Bleaching. Proc 8th International Coral Reef Symposium 2:1495-1498. Available also online at URL <http://www.osdpd.noaa.gov/PSB/EPS/SST/icrs_dud.html>. 3) Liu, G., W. Skirving, and A.E. Strong. 2003. Remote sensing of sea surface temperatures during 2002 Barrier Reef coral bleaching. EOS, 84(15), 137-144. 4) Skirving, W.J., A.E. Strong, G. Liu, C. Liu, F. Arzayus, J. Sapper and E. Bayler, Extreme events and perturbations of coastal ecosystems: Sea surface temperature change and coral bleaching. Chapter 2 in Remote Sensing of Aquatic Coastal Ecosystem Processes, L.L. Richardson and E.F. LeDrew (Co-Eds), Kluwer publishers, January, 2006.

  5. How consistent are the relationships among the observations, including topology?

    none

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints:
Not intended for legal use. Data may contain inaccuracies due to clouded or mixed pixels.

  1. Who distributes the data set? (Distributor 1 of 1)

    NOAA Coral Reef Watch
    c/o C. Mark Eakin, Coordinator, NOAA Coral Reef Watch
    NOAA E/RA31, SSMC1, Room 5308, 1335 East West Hwy
    Silver Spring, Maryland 20910-3226
    USA

    301-713-2857 x 109 (voice)
    301-713-3136 (FAX)
    coralreefwatch@noaa.gov, mark.eakin@noaa.gov

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA 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.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 12-Aug-2008
Metadata author:
NOAA Coral Reef Watch
c/o C. Mark Eakin, Coordinator, NOAA Coral Reef Watch
NOAA E/RA31, SSMC1, Room 5308, 1335 East West Hwy
Silver Spring, Maryland 20910-3226
USA

301-713-2857 x 109 (voice)
301-713-3136 (FAX)
coralreefwatch@noaa.gov, mark.eakin@noaa.gov

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.8.23 on Sun Oct 12 04:25:55 2008