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

4

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