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Aircraft Remote Sensing of Surface Chlorophyll in Chesapeake Bay
Entry ID: NOAA_CBO_ODAS_SURFACE_CHL



Summary
Abstract: These data are maps of remotely sensed chlorophyll observations
starting in 1990. The data were obtained using the Ocean Data
Acquisition System (ODAS), an ocean color instrument developed by
NASA. ODAS consists of 3 radiometers in the blue-green region of the
visible spectrum that measure water-leaving radiance at 460, 490 and
520 nm. This region of the spectrum is responsive to changes in
concentrations of chlorophyll. The instrument package also includes a
Loran-C that acquires navigation data, an infrared sensor to measure
sea surface temperature, and an on-board computer to log the data.

In 1996, a new instrument, the SeaWiFS Aircraft Simulator (SAS II),
was used in parallel with the ODAS instrument. SAS II contains sensors
at 7 wavebands, including the 6 visible bands of the Sea-viewing Wide
Field-of-view Sensor (SeaWiFS) satellite ocean color instrument. The
additional bands of SAS II allows improved recoveries of chlorophyll
in highly turbid conditions or at the extremely high concentrations
that accompany red tides. SAS II also gives data unaffected by the
atmosphere for comparison with satellite data and thus serves as a way
to validate SeaWiFS data for Chesapeake Bay. Map images of chlorophyll
for 1996 and later were generated from SAS II data.

Measurements by both ODAS and SAS instruments are made in low altitude
(150 meters) surveys using small aircraft, such as the De Havilland "Beaver"
which was operated by the Virginia Institute of Marine Science, or newer
aircraft including a Piper Aztec and Cessna 172 Skyhawk. A set of flight tracks
encompassing the Bay is sampled 1-2 times per week. Over 200 flights with
ODAS were made over the Chesapeake Bay and additional 200 flights using
SAS instruments since the inception of the program. The first year of the
program in 1989 focused on developing algorithms for recovering chlorophyll
concentrations by coordinating ship and aircraft measurements. Since 1990,
regular series of 25-30 flights per year have been conducted, spanning the most
productive parts of the year.
[This summary was derived from the NOAA Chesapeake Bay Office WWW page.]

Related URL
Link: VIEW PROJECT HOME PAGE
Description: NOAA Chesapeake Bay Office, website for Study of Phytoplankton Blooms
in the Chesapeake Bay using Aircraft Remote Sensing.


Geographic Coverage
 N: 40.0 S: 36.0  E: -75.0  W: -78.0

Temporal Coverage
Start Date: 1990-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND > Chesapeake Bay
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VIRGINIA > Chesapeake Bay


Science Keywords
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CHLOROPHYLL    [Definition]
OCEANS >COASTAL PROCESSES >ESTUARIES    [Definition]
OCEANS >OCEAN OPTICS >OCEAN COLOR    [Definition]
OCEANS >OCEAN OPTICS >WATER-LEAVING RADIANCE    [Definition]
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
SPECTRAL/ENGINEERING >VISIBLE WAVELENGTHS >VISIBLE IMAGERY    [Definition]
OCEANS >OCEAN CHEMISTRY >PIGMENTS >CHLOROPHYLL    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS >ESTUARY    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS    [Definition]


ISO Topic Category
BIOTA
ENVIRONMENT


Platform
C-130 >Lockheed C-130 Hercules    [Information]


Instrument
LORAN >Long Range Navigation    [Information]
RADIOMETERS    [Information]


Keywords
ODAS
PHYTOPLANKTON BIOMASS
PHYTOPLANKTON BLOOM
PLANKTON BLOOM


Data Set Progress
IN WORK


Originating Center
NOAA/CBO


Data Center
NOAA Chesapeake Bay Office, U.S. Department of Commerce    [Information]
Data Center URL: http://noaa.chesapeakebay.gov/

Data Center Personnel
Name: NOAA CHESAPEAKE BAY OFFICE
Phone: 410-267-5660
Fax: 410-267-5666
Email: derek.orner at noaa.gov
Contact Address:
NOAA Chesapeake Bay Office
410 Severn Ave., Suite 107A
City: Annapolis
Province or State: MD
Postal Code: 21043
Country: USA



Distribution
Distribution_Media: World Wide Web
Distribution_Format: GIF


Personnel
MELANIE F. MEAUX
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov


Publications/References
Synoptic measurements of the distribution of chlorophyll in the
Chesapeake Bay using aircraft remote sensing, L.W. Harding, Jr., and
E.C. Itsweire, in New Perspectives in the Chesapeake System: A
Research and Management Partnership (J. Mihursky and A. Chaney, Eds),
147-160 (1991).

Comparison of phytoplankton biomass estimates for the Chesapeake Bay
using aircraft remote sensing and in-situ chlorophyll data,
E.C. Itsweire, L.W. Harding, Jr., and L. H. Bahner, in New
Perspectives in the Chesapeake System: A Research and Management
Partnership (J. Mihursky and A. Chaney, Eds), 161 - 168 (1991).

Determination of Phytoplankton Chlorophyll Concentrations in the
Chesapeake Bay with Aircraft Remote Sensing, L.W. Harding, Jr.,
E.C. Etsweire and W.E. Esaias, Remote Sensing of the Env., 40: 79-100
(1992).

Estimates of Phytoplankton Biomass in the Chesapeake Bay from Aircraft
Remote Sensing of Chlorophyll Concentrations, 1989-92, L. W. Harding,
Jr., E.C. Itsweire and W.E. Esaias. Remote Sensing of the Env., 49:
41-56 (1994).

Creation and Review Dates
Last DIF Revision Date: 2016-11-18


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