explain surface circulation of the south pacific ocean and how it changes durind an el nino event?

Hi Ashlee,
this is not as heavy reading as you think, you can read the gist of it by skimming through and find all of the important facts you need.
read pp. 4-23 that is the gist of it skip pp. 24-29 (references)
pp. 30-32 are figure discriptions and the rest of the document are figures to give you a visual discription.

http://www.crces.org/presentations/paper_id_jpo.pdf.new