Asignación de profundidad significativa a las observaciones remotas de la temperatura superficial del mar

Se asigna una profundidad efectiva para las medidas de temperatura superficial del mar obtenida mediante AVHRR en aguas del Atlántico Centro-Oriental. Las distribuciones espaciales de temperatura a cierta profundidad pueden definirse por satélite. En la mesoescala (l° mes) y para una precisión absoluta de 1ºK. Se encuentra que el espesor de la capa homogénea varía entre unos 100 m en febrero aproximadamente 20m de septiembre. ABSTRACT: Using a 11 years time series of monthly mean AVHRR sea surface temperatures and a comparable time series of XBT data for Central Eastem Atlantic, a representative depth is assigned to satellite measurements. At mesoscale (1 degree, month resolution) the thickness of fue homogeneous surface layer varíes from approximately 100 m in February to only 20 m in september, for an accuracy of loK in the temperature deterrnination.

Zooplankton oxygen consumption and nutrient release in relation to species composition, animals size and enviromental conditions in the Baltic Sea during May and August

[EN] Zooplankton metabolism in terms of oxygen consumption and ñutrient reléase (ammonia, phosphate) were measiu'ed in the Baltic Sea, a températe área with high envirormiental changes both in space and in time. Plankton of the surface layer were analysed with balance measurements in 4 size classes between 50 and 1000 nm during spring in 1988, 1990 and 1991, in summer 19^8 and 1990 as well. The use of electrón transport system (ETS), and the Glutamate Dehydrogenase (GDH) activity as indicators for respiration and ammonia reléase respectively, enlarged the data density and made a three dimensional resolution available (May 1990, 1991). Data are in the range of the latitudinal dependend magnitude. They reflect slight interannual, more seasonal and regional aspects. Animáis size, temperature, food concentration, and species composition influence the specific rates