PowerPoint Presentation - Impacts of Climate and Interannual variability on the seeding and distribution of Calanus finmarchicus in the Gulf of Maine and Georges Bank

NAO, GS Position and GS Transport
Parsons-Veronis Model

•Parsons-Veronis model relates upstream GS transport as a function of GS separation [Gangopadhyay et al., 1992].

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•Higher transport results in earlier separation and vice versa

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•Latitude of separation can be determined as a function of geostrophic transport (Tg) and transport due to Ekman drift (Te) which is derived from zonally integrated wind stress.

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•Te estimated from NCEP-derived wind stress climatologies for high and low NAO phases.

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•Parsons-Veronis model and NABM-derived transport induced GS separation latitudes are in agreement.

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•GS transport response before separation is most likely forced by NAO-induced wind stress variation. Extensive research by other studies suggest GS transport response after separation is due to NAO-induced local wind stress curl variation.

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