This document contains instructions to: 1) redraw a diagram of summer sea densities with labels of expected water masses, coastal jets, and frontal systems; 2) mathematically estimate front positions and explain the two most important factors in predicting shelf fronts; and 3) name and explain phytoplankton groups found in different water masses, noting that their presence depends on turbulence, nutrients and irradiance.

1. This is a diagram of the general densities contour distributions in summer in the English sea
a) draw this diagram again but add labels of were you would expect water masses, coastal jets
and the different frontal systems you would expect to be there
b) how would you estimate the position of the fronts (above) mathematically and what are the 2
most important parts in the prediction kf shelf fronts?
c) name and explain the phytoplankton groups that could be found in the variety of the water
masses above
whether phytoplankton is there or not is due to a number of features such as turbulence, nutrients
and irradiance