Effects of eddies on an ocean observing system with profiling floats

Idealized simulations of the Argo array

Igor Kamenkovich, Wei Cheng, Claudia Schmid, D. E. Harrison

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study aims at evaluating effects of the mesoscale variability on the expected accuracy of reconstruction of temperature, salinity, and velocities from the Argo measurements and trajectories. For this purpose, an idealized observing system with profiling floats is simulated in a high-resolution ocean model of the North Atlantic set up to produce annual mean hydrography and circulation. The simulations with and without mesoscale variability are compared, and the effects of the time mean and mesoscale eddy-induced advection are effectively separated and investigated. The results demonstrate several effects of mesoscale eddies on the expected accuracy of the Argo-based reconstructions of temperature, salinity, and horizontal velocities. In most of the domain, the eddies help to achieve uniform spatial coverage. The effects of eddy advection on reconstruction errors are, however, complex but moderate in most of the domain. High-frequency variability in temperature and salinity leads to enhancement of reconstruction errors, especially if the sampling is carried out for only a few years. The reconstruction of horizontal velocities from trajectories of the profiling floats is capable of detecting multiple zonal jets which have been observed already. The reconstruction of the meridional velocities is significantly less reliable, primarily due to a small signal-to-noise ratio in the in the interior of domain.

Original languageEnglish (US)
Article numberC06003
JournalJournal of Geophysical Research C: Oceans
Volume116
Issue number6
DOIs
StatePublished - 2011

Fingerprint

Argo
floats
eddy
oceans
vortices
Advection
ocean
salinity
simulation
mesoscale eddy
Trajectories
advection
hydrography
trajectory
trajectories
Temperature
Signal to noise ratio
ocean models
temperature
Sampling

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Oceanography

Cite this

Effects of eddies on an ocean observing system with profiling floats : Idealized simulations of the Argo array. / Kamenkovich, Igor; Cheng, Wei; Schmid, Claudia; Harrison, D. E.

In: Journal of Geophysical Research C: Oceans, Vol. 116, No. 6, C06003, 2011.

Research output: Contribution to journalArticle

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