Data

Mean Monthly Coastal Zone Colour Scanner (CZCS) Maps 1978-1986

Australian Ocean Data Network
CSIRO O&A, Information & Data Centre (Point of contact) CSIRO Oceans & Atmosphere - Hobart (Associated with)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://marlin.csiro.au/geonetwork/srv/eng/catalog.search#/metadata/b5a8d8b4-dd0f-4d13-bce1-805fd4a7ff53&rft.title=Mean Monthly Coastal Zone Colour Scanner (CZCS) Maps 1978-1986&rft.identifier=Anzlic Identifier: ANZCW0306005097&rft.publisher=Australian Ocean Data Network&rft.description=Coastal Zone Colour Scanner (CZCS) composited mean-monthly maps for the Australian EEZ region. The original NASA monthly composites have been processed by John Parslow and Chris Rathbone of the CSIRO Division of Fisheries to produce, for each month, images which are the mean over the 8 years of sampling. These have then been very simply remapped to a 1/2 degree grid, compatible with the regional seasonal ocean physical property maps. The maps are all in units of pigment/m3.Progress Code: completedMaintenance and Update Frequency: notPlannedStatement: NASA CZCS composite images: The Coastal Zone Color Scanner (CZCS) aboard the Nimbus-7 satellite is the first space-borne ocean color sensor designed for measuring phytoplankton pigment concentrations in surface water of the ocean. The sensor operated during November 1978 to July 1986. Global composite data were processed as below by Gene Feldman et al. at NASA Goddard Space Flight Cente. The monthly composites are arithmetic averages of pigment for all pixels containing valid data from daily composite images. Because of the intermittent operation of the sensor, and its limitation to high daylight, many areas are sparsely sampled in a very biassed way. (eg: No winter sampling in higher latitudes). The composites have been produced from level 1 single scene data with the following steps: -subsampled at 1 in 4. -sensor calibration using improved sensor degradation. -multiple scattering rayleigh correction. -aerosol correction with epilsons of 1. -daily ozone concentrations from the TOMS sensor on the Nimbus-7 satellite. -quality control checks. -earth gridding and binning of data to 20 km resolution to daily composites -arithmetic averaging of daily composites to monthly using all pixels with valid data. Analysis by Division Of Fisheries: The images are generated from the 92 monthly composites by the following method: The Australasian region data set of monthly composites of ocean chlorophyll concentration supplied by NASA was analysed in space and time by least squares fitting of time series through the 92 monthly points and at each individual pixel in space. Coherent spatial patterns are observed when the resulting parameters of seasonal variation are presented in image form. For each sea pixel with a sufficient number of months with data, a time series of the log chlorophyll concentration was constructed by least squares fitting of the following parameters. The linear regressions were in terms of the logarithm of concentration in the scale as supplied by NASA.&rft.creator=Anonymous&rft.date=1999&rft.coverage=westlimit=100; southlimit=-50; eastlimit=180; northlimit=0&rft.coverage=westlimit=100; southlimit=-50; eastlimit=180; northlimit=0&rft_rights=Released to CSIRO DMR by permission of custodian May be released to external research bodies, on application to custodian.&rft_subject=oceans&rft_subject=Earth Science | Biosphere | Aquatic Ecosystems | Marine Habitat&rft_subject=Earth Science | Biosphere | Ecological Dynamics | Ecosystem Functions | Primary Production&rft_subject=Earth Science | Oceans | Ocean Chemistry | Pigments&rft_subject=Satellites&rft_subject=Marine Features (Australia) | Australian EEZ&rft_subject=Oceans EEZ 1997-2001&rft.type=dataset&rft.language=English Access the data
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Coastal Zone Colour Scanner (CZCS) composited mean-monthly maps for the Australian EEZ region. The original NASA monthly composites have been processed by John Parslow and Chris Rathbone of the CSIRO Division of Fisheries to produce, for each month, images which are the mean over the 8 years of sampling. These have then been very simply remapped to a 1/2 degree grid, compatible with the "regional seasonal ocean physical property maps". The maps are all in units of pigment/m3.

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Progress Code: completed
Maintenance and Update Frequency: notPlanned
Statement: NASA CZCS composite images: The Coastal Zone Color Scanner (CZCS) aboard the Nimbus-7 satellite is the first space-borne ocean color sensor designed for measuring phytoplankton pigment concentrations in surface water of the ocean. The sensor operated during November 1978 to July 1986. Global composite data were processed as below by Gene Feldman et al. at NASA Goddard Space Flight Cente. The monthly composites are arithmetic averages of pigment for all pixels containing valid data from daily composite images. Because of the intermittent operation of the sensor, and its limitation to high daylight, many areas are sparsely sampled in a very biassed way. (eg: No winter sampling in higher latitudes). The composites have been produced from level 1 single scene data with the following steps: -subsampled at 1 in 4. -sensor calibration using "improved" sensor degradation. -multiple scattering rayleigh correction. -aerosol correction with epilsons of 1. -daily ozone concentrations from the TOMS sensor on the Nimbus-7 satellite. -quality control checks. -earth gridding and binning of data to 20 km resolution to daily composites -arithmetic averaging of daily composites to monthly using all pixels with valid data. Analysis by Division Of Fisheries: The images are generated from the 92 monthly composites by the following method: The Australasian region data set of monthly composites of ocean chlorophyll concentration supplied by NASA was analysed in space and time by least squares fitting of time series through the 92 monthly points and at each individual pixel in space. Coherent spatial patterns are observed when the resulting parameters of seasonal variation are presented in image form. For each sea pixel with a sufficient number of months with data, a time series of the log chlorophyll concentration was constructed by least squares fitting of the following parameters. The linear regressions were in terms of the logarithm of concentration in the scale as supplied by NASA.

Notes

Credit
NASA (for CZCS composite images)
Credit
John Parslow
Credit
Chris Rathbone

Data time period: 1978-11 to 1986-07

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180,0 180,-50 100,-50 100,0 180,0

140,-25

text: westlimit=100; southlimit=-50; eastlimit=180; northlimit=0

Subjects
Earth Science | Biosphere | Aquatic Ecosystems | Marine Habitat | Earth Science | Biosphere | Ecological Dynamics | Ecosystem Functions | Primary Production | Earth Science | Oceans | Ocean Chemistry | Pigments | Marine Features (Australia) | Australian EEZ | Oceans EEZ 1997-2001 | Satellites | oceans |

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Identifiers
  • Local : Anzlic Identifier: ANZCW0306005097
  • Local : Marlin Record Number: 5097
  • global : b5a8d8b4-dd0f-4d13-bce1-805fd4a7ff53