We examine the long-range variability in the oceanographic regime of the Bering Sea during the second half of the twentieth century using the largest T-S data set available, containing about 58,000 stations. We focus on changes in the ice-regime and atmospheric processes over the Bering Sea and Western Arctic. Significant differences in the physical state of the Bering Sea were found between a group of anomalous 'cold' (1955, 1964, 1971, 1972, 1975, 1976, 1977, 1984, 1988) years and 'warm' (1958, 1959, 1962, 1963, 1967, 1978, 1981, 1982, 1987) years. The time-spatial EOF-analyses (product of the first components) show a general cooling in the Bering Sea in 1953-1977 and 1978-1993, and a strong 'warming' in 1977-1978. Likewise, the spatial distribution of EOF temperature (2-4 components) indicates opposite thermal states in the western and eastern part of the Bering Sea: if it becomes warmer in the eastern sector, it becomes cooler in the western. Interaction between the Aleutian Low and Siberian High determines the change over the Bering Sea Region.
ASJC Scopus subject areas
- Aquatic Science