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

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

ĄHigher transport results in earlier separation and vice versa

ĄLatitude 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.

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

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

ĄGS 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.