[Coral-List] New Training on Coral Reef Remote Sensing Now Available
Mark.Eakin at noaa.gov
Tue Mar 3 08:03:08 EST 2009
NOAA's Coral Reef Watch (CRW) program is pleased to announce a new
interactive lesson for the Bilko software that teaches users how to
predict coral bleaching from satellite sea surface temperature data.
The lesson and software are both available for FREE download at: www.unesco.bilko.org
The interactive training module was developed as part of the education
and public awareness initiative of the Remote Sensing Working Group of
the GEF/World Bank Coral Reef Targeted Research program (www.gefcoral.org
), in collaboration with UNESCO’s Bilko remote-sensing distance-
The step-by-step lesson follows the operational CRW methodology, so
users will gain in-depth knowledge of how the NOAA data are produced.
We begin with sea surface temperature (SST) data files derived from
AVHRR imagery, and leads you through the steps to calculate a long-
term average temperature and SST anomalies. You will then calculate a
specialized anomaly, called a HotSpot, that shows areas that are above
the average temperature for the warmest month of the year. It is these
areas where corals are under stress and likely to be bleaching.
Finally, you will look for regions under HotSpot stress for a
prolonged period, calculating a metric called the Degree Heating Week.
The number of DHWs show how much thermal stress has accumulated in an
area over the preceding 12 weeks.
To demonstrate how these satellite data are used in the real world,
the lesson ends with an activity based on a bleaching event in the
Caribbean Sea in 2005. You will interpret satellite data to predict
coral bleaching, then compare your predictions with in situ bleaching
Bilko is a complete system for learning and teaching remote sensing
image analysis. Current lessons focus on the application of remote
sensing to oceanography and coastal management, but Bilko routines may
be applied to the analysis of any image in an appropriate format, and
include a wide range of standard image processing functions. Supported
by UNESCO, Bilko is available to registered users absolutely free and
is used by thousands of students of remote sensing worldwide.
For more information:
C. Mark Eakin, Ph.D.
Coordinator, NOAA Coral Reef Watch
National Oceanic and Atmospheric Administration
Center for Satellite Applications and Research
Satellite Oceanography & Climate Division
e-mail: mark.eakin at noaa.gov
E/RA31, SSMC1, Room 5308
1335 East West Hwy
Silver Spring, MD 20910-3226
301-713-2857 x109 Fax: 301-713-3136
"Now is the time to confront [the climate change] challenge once and
for all. Delay is no longer an option.
Denial is no longer an acceptable response. The stakes are too high.
The consequences, too serious."
President-Elect Barack Obama, Nov. 18 2008
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