Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29i..65b&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 9, pp. 65-1, CiteID 1351, DOI 10.1029/2001GL013806
Physics
7
Oceanography: Physical: Fronts And Jets, Oceanography: Physical: Upper Ocean Processes, Information Related To Geographic Region: Pacific Ocean, Global Change: Oceans (4203)
Scientific paper
Over 200 hydrographic sections are used to trace the Polar Front defined as the southern boundary of the ``pure'' subarctic stratification with a pronounced, extremely cold, subsurface temperature minimum underlain by a temperature maximum. The front extends from 40°N off Japan to 57°N in the Gulf of Alaska where it retroflects and continues WSW with the Alaskan Stream. The front's decadal variability from 1977-1999 is examined along 150°E, 170°E, 175.5°E, and 180°E. At these longitudes the front is relatively stable, except for 170°E, where it shifts north-south by 400 km every 6 years. Most time series reveal a subsurface warming of ~1°C per decade, and a surface cooling, of the front. Since the subsurface temperature minimum is a remnant of winter convection, the subsurface warming signals an amelioration of the winter climate, whereas the summer climate becomes colder.
Belkin Igor
Honjo Susumu
Krishfield Richard
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