Statistically significant trends of ocean colour intensity 1998–2009

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Created : Dec 07, 2010 Published : Dec 07, 2010 Last modified : Nov 29, 2012 11:41 AM

Topics: Coasts and seas ,

The figure shows statistically significant trends of ocean colour intensity 1998–2009 at the 95 % confidence level (Mann–Kendall test)

http://www.eea.europa.eu/data-and-maps/figures/statistically-significant-trends-of-ocean/statistically-significant-trends-of-ocean/image_original

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Statistically significant trends of ocean colour intensity 1998–2009 at the 95% confidence level (Mann–Kendall test) - Excel file

Microsoft Excel spreadsheet
2.38 MB

Statistically significant trends of ocean colour intensity 1998–2009 at the 95% confidence level (Mann–Kendall test) - Excel file

Metadata

Last upload:

07 Dec 2010

Dynamic

Temporal coverage:

1998-2009

Tags:

Geographical coverage:

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Albania Belgium Bosnia and Herzegovina Bulgaria Croatia Cyprus Denmark Estonia Finland France Germany Greece Iceland Ireland Italy Latvia Lithuania Malta Montenegro Netherlands Norway Poland Portugal Romania Russia Serbia Slovenia Spain Sweden Turkey United Kingdom

Methodology:

For each grid point a time series of summer mean Chl-a concentration was calculated for the period 1998-2009, using the same definition of summer as in the observations. The trend in these time series are tested for significance using the Mann-Kendall test.

Rights:

EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (http://www.eea.europa.eu/legal/copyright). Copyright holder: European Environment Agency (EEA).

Owners:

European Environment Agency (EEA)

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Figure type:

Map

Additional information

This analysis is based on satellite observations of ocean colour which is equivalent to chl-a. A global dataset covering the period 1998-2009 and without regional corrections has been used. This dataset is most accurate in the Mediterranean Sea. In the Black Sea, few in-situ observations are available and the satellite imagery is unverified. In the Baltic Sea high concentrations of humic substances in the sea requires a regional correction of the satellite observations, making the analysis less certian in this area.