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WATER CLARITY ASSESSMENT ALONG
THE FLORIDA KEYS REEF TRACT USING OCEAN COLOR
SATELLITE DATABrian Barnes,
Chris Ellis, Bill Fisher, Chuanmin Hu, John Lehrter,
Luke McEachron, Kathleen O’Keife, Blake Schaeffer,
Bruce Spiering, Lauren Underwood
26 September 2012
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Objectives Describe new satellite products Applications of satellite data products in
FKNMS Rezoning EffortEcological Research and Monitoring (W.33)Florida Bay influences (W.24)Researching Water Quality Issues (W.32)
Provide FKNMS with satellite data products Discussion
Assess utility of data products as part of FKNMS Rezoning Effort
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In situ water clarity measurements April 2011, August 2012 HyperPRO – hyperspectral
Kd
26 stations, 53 profiles 33 profiles passed QA 10 concurrent with satellite
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Sat
elli
te d
eriv
ed K
d 4
88 (
m-1)
HyperPRO in situ Kd 488 (m-1)
R2=0.91
Validation of satellite water clarity
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January April
July October
Status & Trends: average condition
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BB
UKMK
LKMQDT
AF
ED
CB
a
b
d
ce
d
εδ
γβ
αζ
Status & Trends: regional variation
Distance from Shore
0 – 4 km
4 – 8 km
8 – 12 km
(from Boyer, WQMP)
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Status & Trends: seasonal variation
Amplitude of Seasonal
Cycle
82002 2004 2006 2008 2010
-80.5
-81
-81.5
-82
Episodic events:Monthly
mean
92002 2004 2006 2008 2010
-80.5
-81
-81.5
-82
Episodic events:Monthly
anomaly
10November 23, 2005
Florida Bay Influences
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Florida Bay Influences
December 7, 2003
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Monitoring: track water masses
December 20, 2003(two weeks later)
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Ecological Research and MonitoringLooe Key CREMP Station
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Other remote sensing data sources
Temperature (MODIS, AVHRR) Satellite overpasses several times
daily Chlorophyll, CDOM concentrations
Satellite algorithms in validation stage
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Distribution mechanisms
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Discussion Use for zoning decision making
Temporal zoningBased upon seasonal events
Zone specific regulationsSize, resource protection
Protect and preserve coral reefsMinimize adverse socioeconomic impacts
Socioeconomic considerationsProvide water clarity for divers
Assess rezoning performance results based upon data products providedSolicit feedback from WQPP, SAC