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| Titel |
The 2011 marine heat wave in Cockburn Sound, southwest Australia |
| VerfasserIn |
T. H. Rose, D. A. Smale, G. Botting |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 8, no. 4 ; Nr. 8, no. 4 (2012-07-27), S.545-550 |
| Datensatznummer |
250005749
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| Publikation (Nr.) |
 copernicus.org/os-8-545-2012.pdf |
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| Zusammenfassung |
| Over 2000 km of Western Australian coastline experienced a significant marine
heat wave in February and March 2011. Seawater temperature anomalies of
+2–4 °C were recorded at a number of locations, and
satellite-derived SSTs (sea surface temperatures) were the highest on record. Here, we present seawater
temperatures from southwestern Australia and describe, in detail, the marine
climatology of Cockburn Sound, a large, multiple-use coastal embayment. We
compared temperature and dissolved oxygen levels in 2011 with data from
routine monitoring conducted from 2002–2010. A significant warming event,
2–4 °C in magnitude, persisted for > 8 weeks, and seawater
temperatures at 10 to 20 m depth were significantly higher than those
recorded in the previous 9 yr. Dissolved oxygen levels were depressed at
most monitoring sites, being ~ 2 mg l−1 lower than usual in
early March 2011. Ecological responses to short-term extreme events are
poorly understood, but evidence from elsewhere along the Western Australian
coastline suggests that the heat wave was associated with high rates of coral
bleaching; fish, invertebrate and macroalgae mortalities; and algal blooms.
However, there is a paucity of historical information on
ecologically-sensitive habitats and taxa in Cockburn Sound, so that formal
examinations of biological responses to the heat wave were not possible. The
2011 heat wave provided insights into conditions that may become more
prevalent in Cockburn Sound, and elsewhere, if the intensity and frequency of
short-term extreme events increases as predicted. |
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