English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This note studies the impact of horizontal diffusion (HD) on the thermohaline circulation (THC) within a modified Stommel’s box model, which was introduced by Longworth et al. HD may arise as a result of mesoscale eddies from the instability of wind-driven gyres. Focuses are on the multi-equilibriums’ existence and nonlinear stability of the THC. A nonlinear approach called conditional nonlinear optimal perturbation (CNOP) is adopted. Both numerical and analytical analyses suggest that there exists a physical mechanism, which makes HD result in more decrement of salinity difference in the meridional direction than that of temperature difference. Consequently, the effects of HD on the thermally and salinity-driven equilibriums of THC are different: HD stabilizes the former but destabilizes the latter.

Impact of Horizontal Diffusion on the Nonlinear Stability of Thermohaline Circulation in a Modified Box Model