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The need for climatological data of the North Sea has increased
during the past years. The increase in offshore and recreational
activities can benefit greatly from such data. In order to meet
this need weather observations made by ships and lightvessels in
the North Sea have been processed extensively, which has resulted
in a large number of tables, charts, etc. with climatological data.
This publication gives a selection of these data, in which the
emphasis lies on wind and wave data. In addition, some
characteristic data on air and sea tempera ture, cloud cover,
precipitation, visibility and sea level pressure are given. With
regard to the observations of the lightvessels the publication can
be consi dered as a continuation of earlier work. It also concludes
the era of observations made by crew on board lightvessels, which
gradually ended in the 1970's. The observations on fixed platforms
which are now replacing the observations of the lightvessels are of
a quite different character. The data are based on observations
made on board lightvessels during the period 0 1949 -1980 and
voluntary observing ships in the area between 51 ON and 60 N during
the period 1961-1980. The observations of the lightvessels have
been compared with those published for earlier periods (1859 -1883,
1884 -1909 and 1910 -1940). The manuscript (or part of it) has been
critically examined by Prof.Dr.Ir. J.A. Battjes, E. Bouws, Dr.Ir.
J.A. Buishand, H.A.M. Geurts, Dr. GJ.Komen, Dr. G.P."
The need for climatological data of the North Sea has increased
during the past years. The increase in offshore and recreational
activities can benefit greatly from such data. In order to meet
this need weather observations made by ships and lightvessels in
the North Sea have been processed extensively, which has resulted
in a large number of tables, charts, etc. with climatological data.
This publication gives a selection of these data, in which the
emphasis lies on wind and wave data. In addition, some
characteristic data on air and sea tempera ture, cloud cover,
precipitation, visibility and sea level pressure are given. With
regard to the observations of the lightvessels the publication can
be consi dered as a continuation of earlier work. It also concludes
the era of observations made by crew on board lightvessels, which
gradually ended in the 1970's. The observations on fixed platforms
which are now replacing the observations of the lightvessels are of
a quite different character. The data are based on observations
made on board lightvessels during the period 0 1949 -1980 and
voluntary observing ships in the area between 51 ON and 60 N during
the period 1961-1980. The observations of the lightvessels have
been compared with those published for earlier periods (1859 -1883,
1884 -1909 and 1910 -1940). The manuscript (or part of it) has been
critically examined by Prof.Dr.Ir. J.A. Battjes, E. Bouws, Dr.Ir.
J.A. Buishand, H.A.M. Geurts, Dr. GJ.Komen, Dr. G.P."
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