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

Although potential vorticity (PV) is central to many theories of the oceanic circulation, the entry / exit of PV at the sea surface has not been thoroughly discussed from an observational perspective. After clarifying the notion of ‘PV entry and exit’, and the mechanisms responsible for it, we present a climatology of this quantity for the Northern Hemisphere. It is found that surface PV loss over western boundary current regions and their interior extension is a robust feature over the North Pacic,and Atlantic basins. At high latitudes, mechanical and diabatic eects act in concert in the North Atlantic to drive net PV exit. In the Pacic, however, these eects oppose each other and the net entry - exit of PV is more uncertain. At low latitudes, surface winds are found particularly important in setting surface PV exit in the Pacic, equatorward of the inter-tropical convergence zone. 3

Observations of Entry and Exit of Potential Vorticity at the Sea Surface