In our April 2002 issue, we reviewed the adverse effects on Pacific diving of the impending El Niņo that
some researchers opined would last well into 2003.
Indeed water surface temps did rise, but much less than during the 1997-1998 El Niņo when temperatures
went as high as 13oF above normal in some locations. With the present water temperatures between the
International Date Line and the coast of South America only 1.5oF to 3.5oF above expectation, experts are
terming it a weak to moderate event.
As with past El Niņos, this heating has cooled diving adrenaline. James Lyle of southern California made
his second trip to Cocos Island in early January of this year and reported: " ... the waters around Cocos are
much warmer than usual. The surface temps were 86-87oF with a thermocline at 90 feet below which the water
was 78oF. We did not observe any coral bleaching and encountered abundant fish life but fewer hammerhead
sharks than we did four years ago."
Interestingly, areas immediately off the coast of South America, including the Galapagos, have recorded
normal water temperatures. And big animal sightings have been consistently high. Zeina Siraudin of
Philadelphia, Pa., did a week on the Galapagos Aggressor in December, when temperatures above the thermocline
were running in the high 60s to low 70s oF in the southern islands, in the mid to upper 70s oF for the
northern islands, and proportionately cooler below the thermocline. Siraudin reported 25 whale shark
sightings and plenty of hammerheads as long as there was a brisk current.
Many experts are predicting El Niņo conditions will weaken through the spring of 2003, but until the
climatological all-clear is sounded, keep your expectations in check.
- Doc Vikingo