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Large temperature plunges recorded by data loggers at different depths on an Indian Ocean atoll: comparison with satellite data and relevance to coral refuges
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Sheppard, Charles (Charles R. C.) (2009) Large temperature plunges recorded by data loggers at different depths on an Indian Ocean atoll: comparison with satellite data and relevance to coral refuges. Coral Reefs, Vol.28 (No.2). pp. 399-403. doi:10.1007/s00338-009-0476-x ISSN 0722-4028.
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Official URL: http://dx.doi.org/10.1007/s00338-009-0476-x
Abstract
Seawater temperature was recorded at two-hourly intervals for two years (March 2006-March 2008) by six data loggers in Diego Garcia atoll, central Indian Ocean. Loggers were substrate mounted, in two transects of 5, 15 and 25 m depth on a seaward reef and in a lagoonal pass. During the season of mixed but predominantly northwest winds, regular plunges of temperature of 5-7A degrees C occurred with a periodicity of 1-4 days. This partly coincided with the period of greatest annual warming. Temperature fluctuations increased with increasing depth. Temperature traces are compared with HadISST1 and AVHRR satellite-derived temperature data which do not capture the deeper water temperature plunges. Reasons for the regular temperature plunges appear to include both tidal cycles and unidentified, internal waves. This is important for issues of coral refuges, complicating use of satellite-derived temperature data for planning optimal coral reef conservation areas.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QH Natural history > QH301 Biology | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Biological Sciences ( -2010) | ||||
Journal or Publication Title: | Coral Reefs | ||||
Publisher: | Springer | ||||
ISSN: | 0722-4028 | ||||
Official Date: | June 2009 | ||||
Dates: |
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Volume: | Vol.28 | ||||
Number: | No.2 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 399-403 | ||||
DOI: | 10.1007/s00338-009-0476-x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | United Kingdom's OTEP |
Data sourced from Thomson Reuters' Web of Knowledge
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