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Sea Temperatures
AIMS has been recording sea temperature data since 1987. Sea
temperature is the most important environmental variable
governing the abundance and distribution of life in our coastal
seas. Even on tropical coral reefs, sea temperature has a
surprisingly large influence on what grows where. Reef corals,
for example, have a very narrow range of thermal tolerance.
Temperature tolerance in reef corals is as much
about how long they spend at high temperatures as it is about how high
temperatures get.
| For example, corals at Magnetic Island in the
central GBR can happily stand 30.5°C for 20 days, but just 90km
away at Davies Reef, the same species of corals will bleach
within a day and at Great Keppel Island in the southern GBR, they
would be dead within a day. Prolonged exposure to warm sea temperatures has been linked by
AIMS research to an increase in the frequency of mass coral
bleaching events, outbreaks of coral disease and plagues of
crown-of-thorns starfish. |

Bleached Keppel Island corals.
Photo: Dr Ray Berkelmans.
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AIMS sea surface temperature data is also used in-house to
calibrate temperature reconstructions from coral cores and
satellite imagery, and also to better understand other biological
processes on coral reefs such as coral growth and reproduction.
AIMS monitors sea temperature using remote satellites as well
as in-situ temperature loggers. These instruments are now managed
by AIMS as part of its role in coordinating the Great Barrier
Reef Ocean Observing System (GBROOS) node of the nation-wide
Integrated Marine Observing System (IMOS).
In-situ sea temperature data
Satellite sea surface temperature data
Great Barrier Reef Ocean Observing System
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November 7, 2008
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