The velocity and mixing time scale of the Arctic Ocean Boundary Current estimated with transient tracers

A. Mauldin, Peter Schlosser, R. Newton, W. M. Smethie, R. Bayer, M. Rhein, E. Peter Jones

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The Arctic Ocean Boundary Current (AOBC) is a persistent, large-scale feature of Arctic circulation that transports water of Atlantic origin around the Eurasian and Canadian Basins. Despite its importance as a link between North Atlantic sea surface temperature and the heat budget of the Arctic Ocean, elements of the pathways of the AOBC are still not well understood. Here we use transient tracer data collected during the 1990s at 22 locations to calculate the velocity and mixing time scale of the AOBC. The apparent spreading velocity derived from correlating 3H-3He ages in the Barents Sea branch water (BSBW) with the distance from its entry point at the Santa Anna Trough is 0.9 cm s-1. To correct this apparent velocity for the effects of mixing along the pathway, the AOBC is modeled as a leaky pipe, and 3H-3He and chlorofluorocarbon data are used to calculate the parameters of its transit time distribution function. The modeled velocity of the AOBC is 2.5 ± 0.5 cm s-1, and the time scale for mixing of waters between the core of the boundary current and the adjacent water masses is 5-10 years. These results imply that the advective time for transport around the perimeter of the Arctic Ocean from the Santa Anna Trough to the southern Canada Basin (approximately 6000 km) is 7.5 years, and the amplitude of a temperature anomaly or salinity anomaly in BSBW should decrease by 50%-75% along this path.

Original languageEnglish (US)
Article numberC08002
JournalJournal of Geophysical Research: Oceans
Volume115
Issue number8
DOIs
StatePublished - Jan 1 2010
Externally publishedYes

Fingerprint

Arctic Ocean
boundary current
tracers
Arctic region
tracer techniques
tracer
timescale
Water
Barents Sea
water
Chlorofluorocarbons
troughs
trough
heat budget
anomalies
chlorofluorocarbons
Distribution functions
basins
time functions
CFC

ASJC Scopus subject areas

  • Geophysics
  • Oceanography
  • Forestry
  • Aquatic Science
  • Ecology
  • Condensed Matter Physics
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Materials Chemistry
  • Palaeontology

Cite this

The velocity and mixing time scale of the Arctic Ocean Boundary Current estimated with transient tracers. / Mauldin, A.; Schlosser, Peter; Newton, R.; Smethie, W. M.; Bayer, R.; Rhein, M.; Jones, E. Peter.

In: Journal of Geophysical Research: Oceans, Vol. 115, No. 8, C08002, 01.01.2010.

Research output: Contribution to journalArticle

Mauldin, A. ; Schlosser, Peter ; Newton, R. ; Smethie, W. M. ; Bayer, R. ; Rhein, M. ; Jones, E. Peter. / The velocity and mixing time scale of the Arctic Ocean Boundary Current estimated with transient tracers. In: Journal of Geophysical Research: Oceans. 2010 ; Vol. 115, No. 8.
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