Salinity signature of the Pacific Decadal Oscillation

Details Salinity signature of the Pacific Decadal Oscillation Salinity signature of the Pacific Decadal Oscillation

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1337o&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 9, p. 1337-1340

Physics

11

Oceanography: General: Climate And Interannual Variability, Oceanography: Physical: Hydrography, Information Related To Geographic Region: Pacific Ocean

Scientific paper

Three sites in the North Pacific have temperature and salinity observations in most months for several years before and after 1977. The Gulf of Alaska station (57°N, 148°W) showed a 2°C warming and a 0.6 freshening in salinity at 10 m depth in the 1980s compared to the 1970s. OWS PAPA (50°N, 145°W) and PAPA line station 7 (49.1°N, 132.4°W) show warming of 0.6°C and 0.9°C, with no major salinity change. The decrease in density and increase in stratification in the Gulf of Alaska after 1977 corresponds primarily to a decrease in salinity in the upper 150 m. We propose that while the Pacific Decadal Oscillation has an east/west character in temperature, the salinity signature will have a NNW/SSE character, similar to the pattern of interannual variability in precipitation.

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