Description Format Source References

The dataset contains *590* (transformed) daily maxima of five
air pollutants (respectively PM10, NO, NO2, 03 and S02) recorded in Leeds (U.K.) during five winter
seasons (November-Februrary) between 1994 and 1998. Contains `NA`

's.
Outliers have been removed according to Heffernan and Tawn (2004).

A *590*5* matrix.

Heffernan, J. E., and Tawn, J. A. (2004).
A conditional approach for multivariate extreme values.
*Journal of the Royal Statistical Society, Series B, Methodology*, **66**, 497–546

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