Ocean chlorophyll studies from a U-2 aircraft platform

Technical Report · Wed Aug 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5309225· OSTI ID:5309225

Kim, H. H.; McClain, C. R.; Blaine, L. R.; Hart, W. D.; Atkinson, L. P.; Yoder, J. A.

Chlorophyll gradient maps of large ocean areas were generated from U2/OCS data obtained over test sites in the Pacific and Atlantic Oceans. The delineation of oceanic features using the upward radiant intensity relies on an analysis method which presupposes that radiation backscattered from the atmosphere and ocean surface can be properly modeled using a measurement made at 778 nm. The calculation of atmospheric radiance was performed using a method developed by J.V. Dave. An estimation of the chlorophyll concentration is performed by properly ratioing radiances measured at 472 nm and 548 nm after removing the atmospheric effects. The correlation between the remotely sensed data and in-situ surface chlorophyll measurements has been validated in two sets of data. The results show that the correlation between the in-situ measured chlorophyll and the derived quantity is a negative exponential function and the correlation was calculated to be -0.965.

• Research Organization: NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
• DOE Contract Number: AS09-76EV00936
• OSTI ID: 5309225
• Report Number(s): DOE/EV/00936-T1
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
47 OTHER INSTRUMENTATION
CHLOROPHYLL
AERIAL MONITORING
OPTICAL SPECTROMETERS
PERFORMANCE
COMPUTER CALCULATIONS
MATHEMATICAL MODELS
QUANTITY RATIO
REMOTE SENSING
SEAS
CARBOXYLIC ACIDS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MEASURING INSTRUMENTS
MONITORING
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
SPECTROMETERS
SURFACE WATERS
520100* - Environment
Aquatic- Basic Studies- (-1989)
440300 - Miscellaneous Instruments- (-1989)