Assume that the sea water density variations in the upper 600 m of the ocean can be expressed by the equation p(p, z) = Po + Asin2 TI Z 2 d + Bsin?($) with the three density constants po = 1023 kg/m3, A = 4 kg/m3, B =2 kg/m and d = 600 m. o symbolizes the latitude in the range -7/2