Institute of Oceanology PAS,
Oceanologia No. 37 (1) / 95

Contents

Papers

Reviews

Dissertations

Papers

Sergey V. Semowski, Bogdan Wozniak

Model of the annual phytoplankton cycle in the marine ecosystem- assimilation of monthly satelite chrolophyll data for the North Atlantic and Baltic

Manuscript received November 23, 1994, in final form January 25, 1995

Abstract
An annual-cycle model for the phytoplankton-zooplankton-nutrients ecosystem is presented for the North Atlantic and Baltic Sea. Satellite-derived surface chlorophyll data assimilation in the ecosystem model are discussed, and a number of methods of fitting model dynamics to the data are proposed. Statistical analysis of simulation results yields the main types of annual chlorophyll and primary production variability.

Jolanta Kusmierczyk-Michulec

A semi-empirical expression for the solar spectral diffuse irradiance at the sea surface

Manuscript received November 7, 1994, in final form January 12, 1995

Abstract
A simple, semi-empirical expression, valid in the visible spectrum for calculations of the solar diffuse irradiance, is presented. This relation is based on experimental data collected on cloudless days in 1993 and 1994 over the southern Baltic Sea. In order to illustrate the accuracy of the proposed formula, the aerosol optical thickness is calculated. The semi-empirical diffuse irradiance and the aerosol optical thickness.

Jan Piechura, Waldemar Walczowski

The Arctic Front: structure and dynamics

Manuscript received January 4, 1995, in final form February 2, 1995

Abstract
During summer expeditions of r/v "Oceania" to the Arctic Seas, the Arctic Front has been crossed and investigated each time since 1987. The 1993 cruise initiated more detailed investigations of this phenomenon. In the area delimited by longitudes 2o41'W and 2o05'E and lattitudes 70o54'N and 72o32'N, five CTD transects were done with the CTD cast every 5 or 2 nm on each transect.
The location and direction of the front have been defined. The geostrophic component of the general circulation shows good agreement with the earlier data: a strong current (up to 40 cm s-1) on the Atlantic side of the front, about zero velocity in the middle and weak a current (5-10 cm s-1) on the Arctic side of the front. The steepest horizontal gradients were ca 0.5oC km-1 (temperature) and ca 0.04 psu km-1 (salinity). The data reveal the complicated structure of the front with its intrusions, meanders and gyres.

Maciej Matciak, Jacek Nowacki

The Vistula river discharge front-surface observations

Grazyna Kowalewska

Metalloporphyrins in recent sediments of the Baltic Sea

Amany Mohamed Haroon, Anna Szaniawska, Waldemar Surosz

Changes in heavy metal accumulation in Enteromorpha spp. from the Gulf of Gdansk

Aldona Dobrzycka, Anna Szaniawska

The effect of salinity on osmoregulation in Corophium volutator (Pallas) and Saduria entomon (Linnaeus) from the Gulf of Gdansk

Marcin Plinski

Phytoplankton of the Gulf of Gdansk in 1992 and 1993

Reviews

Andrzej Icha

The theory of turbulence in stratified media (review by Czeslaw Druet)

Dissertations

Slawomir Kwasniewski

Mesozooplankton distribution in the epipelagial of the Norwegian-Barents Seas boundary in summer (review by Jan Marcin Weslawski)

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Marcin Wichorowski <wichor@iopan.gda.pl.pl>, 26.09.1995