By H. van Loon, D. J. Shea (auth.), Professor Dr. Dietrich Sahrhage (eds.)
During the intensification of analysis actions within the Southern Ocean lately, either at nationwide degrees and during overseas cooperation in such initiatives as BIOMASS with its FIBEX and SIBEX levels, the necessity used to be felt more and more for nearer collaboration among biologists, meteorologists, and oceanographers within the examine of the interplay among the atmospheric forces, the water lots, and the residing assets. greater wisdom during this regard is not just of medical curiosity but in addition of sensible value, in particular for the administration of the assets and the security of the Antarctic marine surroundings. As a follow-up on a advice via the IOC software workforce for the Southern Oceans made in March 1983, the Intergovernmental Oceanographic fee geared up a gathering of specialists on oceanography on the topic of the dynamics of the Antarctic ecosystems. in this assembly, held in Kiel, Federal Republic of Ger many, in could 1984, biologists and oceanographers all for BIOMASS actions met with the oceanographers of SCOR operating workforce seventy four to debate methods and capacity for extra actual and chemical observations within the oceanographic study inside of BIOMASS. It used to be the time whilst huge fluctuations within the distribution of krill with next damaging results on predator species depending on krill had simply been saw, and the query arose even if this was once potentially the results of alterations within the Antarctic water circulation.
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Additional resources for Antarctic Ocean and Resources Variability
At all latitudes. 6 units (hPa2 ). 5°S (Fig. 80 within this frequency band without pronounced phase differences (Fig. l2c). 5°S; furthermore, phase differences are negligible. 5°S, but they reveal no significant correlation with the neighboring latitude belts. Furthermore, spectral variance is low for periods of 3 years or more. The same investigation was performed with the deviations from longitudinal means, divided into the northerly (50-60 0 S) and the southerly (60-70 0 S) zone. 45 years (5 months) reach high values of more than 5 hPa 2 .
6. Seasonal courses and yearly means of air pressure at latitudes in summer and winter. This half-yearly cycle is much stronger than the yearly one in the regions in question. According to van Loon and Rogers (1984), close to the tip of the Antarctic Peninsula it reaches 90% of the total annual variance. In the yearly average the strongest winds in the area under consideration occur between 50 and 55°S with more than 7 mIs, and the weakest in the cyclonic belt between 65 and 700S. This statement is valid only for the zonal component and for monthly means, not for actual weather situations.
It is assumed that warm or cold conditions usually continue into the following austral summer season, so that for example 1980 means cold conditions in the beginning of the 1980/81 season, as actually observed. The years listed coincide to a great extent with those identified by Limbert (1974). On the basis of data from Grytviken, Deacon (1977) characterized the seasons 1927/28 and 1930/31 as cold years and the seasons 1929/30 and 1936/37 as warm years. This is in agreement with the results of Mackintosh (1972), who furthermore showed for the period 1926-1938 that variations of the air temperatures for the middle of each year at the South Orkney Islands were very similar to those of sea temperatures at South Georgia 6 months later.