Non‐parametric trend test of baltic sea data

Environmetrics - Tập 2 Số 3 - Trang 263-278 - 1991
Per Sandén1, Lars Rahm2, Fredrik Wulff2
1Swedish Meteorological and Hydrological Institute, S‐60176 Norrköping, Sweden
2Department of Systems Ecology, University of Stockholm, S‐10691 Stockholm, Sweden

Tóm tắt

AbstractThe recently reported tendencies toward decreasing total amounts of silicate in the Baltic Sea are investigated by use of non‐parametric trend analysis. The period 1968‐1986 showed significant falling trends in surface waters from the whole system. The deepest parts of the Baltic proper did in contrast reveal strong increasing trends. These trends are more pronounced during the latter part of the analysis period which is characterized by stagnant conditions in the Baltic proper. These conditions have been prevailing since the major inflow in 1976. The causes of the observed changes are unclear. The increased load of nutrients and accompanying increase in primary production is, however, one factor. Another is coupled to the stagnation conditions of the Baltic Proper.

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Environmetrics

Tập 2 Số 3

263-278

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