1960s nimbus sea ice extent - project basis 1 the recent project to recover nimbus data is an...
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1960s Nimbus Sea Ice Extent - Project Basis
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• The recent project to recover Nimbus data is an opportunity to use this 1960s data to create sea ice extent and climate data records (CDRs) for this era.
• A critical need in climate research is to obtain continuous high quality data records and images as far back in time as is practical for statistical significance.
• Early Earth-observing satellite data were not fully explored due to the limitations of historical programs and processing systems.
• Much of the digital data has never been seen, some of the tapes and films are either missing or deteriorating.
• The original engineers and researchers are now mostly in their 70s and 80s, and time is running out to contact them.
• Only a portion of the original 6-bit, 7 track tapes have been recovered and none has been converted to modern formats (such as HDF or NetCDF).
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Nimbus II HRIR in Google Earth, Sept 23, 1966
THE POTENTIAL FOR DETERMINING HISTORIC SEA-
ICE EXTENT FROM 1960’S NIMBUS HRIR SATELLITE DATA
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Prior Work on Sea Ice with Nimbus (1972)
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From: Nimbus satellite data for polar ice survey. J. Sissala et al, Polar Record, 1972
July 1966-15.26 106km2, 1969-16.83 106km2, 1970-17.62 106km2 2010~15.88 106km2
August 1966-15.17 106km2, 1969-17.19 106km2, 1970-18.55 106km2
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THE POTENTIAL FOR DETERMINING HISTORIC SEA-
ICE EXTENT FROM 1960’S NIMBUS HRIR SATELLITE DATA
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19701969
1966 1966
19691970
17.6216.83
15.26
18.55
17.19
15.17
Nimbus Values (Sissala)
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Chart of Polar 1960s observing satellites(August 1960-December 1969)Yellow=possible dataGreen=confirmed data
250+ Satellites (American & Soviet)
Only 20+ with confirmed data still in existenceData Quality very high
Inclination of at least 58°Recorded visible light and/or IRSensors include- HRIR, AVCSCosmos 243 passive microwave
Months
Sate
llite
s
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Nimbus I AVCS Image September 9, 1964
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From: Nimbus satellite data for polar ice survey. J. Sissala et al, Polar Record, 1972
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ARGON Greenland Mosaics, 1962 & 1963
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From: Greenland Ice Sheet Mapping using 1960s DISP Imagery.
Guoqing Zhou
Guoqing Zhou et al 2003
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Other Satellite Sources
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Meteor-Priroda (1978)Apollo 10 Image of The Arctic April 1969 AS10-34-5013
TIROS IX Image of Ross Ice Shelf January 1965
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Other Satellite Sources
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Meteor-Priroda (1978)Apollo 10 Image of The Arctic April 1969 AS10-34-5013
TIROS IX Image of Ross Ice Shelf January 1965