The El Nino Southern Oscillation
 http://www.john-daly.com/elnino.htm

El Nino. A bibliography
http://www.eh-resources.org/bibliography/biblio_nino.html

What is an El Nino?
http://www.pmel.noaa.gov/tao/elnino/el-nino-story.html

Origins-Ground Zero
http://www.pbs.org/wgbh/nova/elnino/anatomy/origins.html

Creating an Earth System: El Nino
http://images.google.com/imgres?imgurl=http://www.ucmp.berkeley.edu/education/dynamic/session4/images_sess4/elnino1.gif&imgrefurl=http://www.ucmp.berkeley.edu/education/dynamic/session4/sess4_hydroatmo3.htm&usg=__BY7t3hG8LV6TMxAUZ6TOz9qHeLY=&h=309&w=404&sz=5&hl=en&start=32&um=1&tbnid=Vw0M2GAxB_c9EM:&tbnh=95&tbnw=124&prev=/images%3Fq%3Del%2Bnino%2Bsouthern%2Boscillation%26ndsp%3D20%26hl%3Den%26safe%3Dactive%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DPot%26sa%3DN%26start%3D20%26um%3D1

Goldstein, Mel. The Complete Idiots Guide to Weather.
          USA: Butler- Knight, 2002.

 

Botkin and Keller. Environmental Science.
        John Wiley & Sons Inc. 2007