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Aircraft laser derived chlorophyll distribution across the Iceland-Faeroe frontThe ocean surface color (water-leaving radiances) and thermal structure across the Iceland-Faeroe Front under both clear and cloudy conditions were measured from a NASA research aircraft on 25 May 1989. The measurements were made along four north-south lines that were 125 km in length and spaced 35 km apart. The color measurements were made with a 14 channel, non-polarized Multispectral Airborne Radiometer System (MARS) while the thermal data were collected by a thermal radiometer and aircraft bathythermographs. The satellite imagery (NOAA AVHRR) sequence show the development of meanders through the frontal region. These aircraft ocean color and thermal data characterize the biological distribution and are closely coupled to the physical processes occurring in the frontal systems. The ratio of several channels of the ocean color data are used to determine the surface chlorophyll. The retrieved data correlate well with laser-induced chlorophyll fluorescence obtained at the same time and historical chlorophyll data. The observed chlorophyll patchiness appearing across the Iceland-Faeroe Front is believed to be directly and indirectly related to primary and secondary circulation processes in ocean frontal systems. High chlorophyll concentrations were observed on the north side of the front and are inferred to be the result from the advection of Icelandic Coastal Water into the region. The sharp chlorophyll decline at and south of the thermal frontal boundary is clearly related to the subsurface thermal structure.
Document ID
19910016137
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Arnone, Robert A.
(NASA John C. Stennis Space Center Bay Saint Louis, MS, United States)
Laviolette, Paul E.
(NASA John C. Stennis Space Center Bay Saint Louis, MS, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Publication Information
Publication: NASA, Washington, 4th Airborne Geoscience Workshop
Subject Category
Earth Resources And Remote Sensing
Accession Number
91N25451
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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