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Global change and variation in SST and Chl-a (2004-2018)

Created 25/06/2025

Updated 25/06/2025

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Changes over the scale of decades in oceanic environments present a range of challenges for management and utilisation of ocean resources. Here we investigate sources of global temporal variation in Sea Surface Temperature (SST), Ocean Colour (Chla, a proxy for primary production) and their co-variation, over a 14 year period using statistical methodologies that partition sources of variation into inter-annual and annual components and explicitly account for daily auto-correlation. The variation in SST shows bands of increasing variability with increasing latitude, while the analysis of annual variability in Chl-a shows mostly mid-latitude high variability bands. Covariation patterns of SST and Chl-a suggests several different mechanisms impacting Chl-a change and variance. Our high resolution analysis indicates these are likely to be operating at relatively small spatial scales. There are large regions showing warming and rising of Chl-a, contrasting with regions that show warming and decreasing Chl-a. The covariation pattern in annual variation in SST and Chl-a reveals broad latitudinal bands. On smaller scales there are significant regional anomalies where upwellings are known to occur. Over decadal time scales both trend and variation in SST, Chl-a and their covariance is highly spatially heterogeneous, indicating that monitoring and resource management must be regionally appropriate.

Files and APIs

Additional Info

Field Value
Title Global change and variation in SST and Chl-a (2004-2018)
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/24bcbbca-3322-4d27-bdab-9d10585d63cb
Contact Point
CSIRO Marlin Data Catalogue
Piers.Dunstan@csiro.au
Reference Period 09/10/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
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Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "Global change and variation in SST and Chl-a (2004-2018)". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/global-change-and-variation-in-sst-and-chl-a-2004-2018