You are here

Warming Off The Peruvian Coast: Potential Consequences And Implications

Sea Surface Temperature Anomalies (SSTA) in the eastern Pacific on May 7, 2012.
Monday, May 7, 2012

Sea surface temperature anomalies (SSTA) in the Eastern Pacific, specifically off the Peruvian coast, have shown a recent warming. SSTA is defined as the difference between the actual temperature and normal conditions for that time of year. Negative anomalies indicate cooler than normal temperatures, while positive anomalies indicate warmer than normal temperatures. Warm anomalies greater than 2°C have been persistent off the northern to central coast of Peru for over one month. Such warming events off Peru have been historically known to precede El Niño conditions in the Equatorial Pacific. Although it is too early to determine whether such warm anomalies will lead to a shift to El Niño conditions in the Equatorial Pacific, some local effects have already been seen.