proposed research: temporal dynamics of coral reefs using remotely sensed data alicia l. simonti...
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Proposed Research:Temporal Dynamics of Coral Reefs using Remotely Sensed
DataAlicia L. [email protected]
http://students.clarku.edu/~asimonti/
Master of Arts Candidate inGeographic Information Science for Development and the Environment
International Development, Community, and EnvironmentGraduate School of Geography
Clark UniversityWorcester, MA USA
Research Advisors: Ron Eastman & John Rogan
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Research Question
Can a correlation between
sea surface temperature and changes in
live coral cover be determined using a
Time Series Analysis of MODIS imagery?
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Outline
• Importance of coral reefs• Importance of remote sensing to
coral reef monitoring• Study Area• Methodology• Conclusion: review the research
question• Q & A time
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Why are coral reefs important?
Biological importance:• most diverse of all marine ecosystems
Economical importance:• stabilize shorelines/prevent erosion• multi-million dollar fisheries industry• tourism
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Benefits of Remote Sensing to Coral Reefs
Alleviates many limitations of in situ data collection
• Ability to observe and analyze reef status across large geographic areas
• Ability to observe and analyze reef status with much greater temporal resolution
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Study Area: Mesoamerican Barrier Reef
l
Map courtesy of the National Oceanic and Atmospheric Administration (NOAA)http://www.coral.noaa.gov/reef_maps/volume1/belize_large.jpg
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Data and ImageryModerate Resolution Imaging Spectrodiometer
(MODIS):Multispectral, 250 m, 1-2 days, 2000-2007Sea Surface Temperature Product
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER):
Multispectral, 15 & 30 m, 5 days, 2000-2007
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Methodology
• Summarize current literature • Mask out terrestrial areas
• Depth/bathymetry determination• Depth/bathymetric correction
• Map live coral cover• Time series analysis• Correlation
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MethodologyInterference of Water
Image courtesy of Joyce and Phinn, in prep
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Methodology: Live Coral Index
Images courtesy of Joyce et al., in preparation
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Methodology: Time Series Analysis
TSA Component 5: South America
-0.15
-0.10
-0.05
0.00
0.05
0.10
0.15
1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
ND
VI
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Methodology: Correlation
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MethodologyAcquire & organize data
Summarize water & coral
Learn LCI (Live coral index)
Mask land
Water determination/correction
Apply LCI
Develop LCI for MODIS
LCI
Time Series
Correlation
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Research Question
Can a correlation between
sea surface temperature and changes in
live coral cover be determined using a
Time Series Analysis of MODIS imagery?
Proposed Research:Temporal Dynamics of Coral Reefs using Remotely Sensed
DataAlicia L. [email protected]
http://students.clarku.edu/~asimonti/
Master of Arts Candidate inGeographic Information Science for Development and the Environment
International Development, Community, and EnvironmentGraduate School of Geography
Clark UniversityWorcester, MA USA
Research Advisors: Ron Eastman & John Rogan
16
TimelineSummer 2007 Acquire & organize data
Summarize: coral and waterResearch LCI
Fall 2007 PreprocessingApply LCITime series analysis
Spring 2008 CorrelationCompare with current literatureGenerate final paper