what is the meaning of the first term?
It is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water.
El Niño
El Niño (; ) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (between approximately the International Date Line and 120°W), including the area off the Pacific coast of South America. 
what is the average winter temperature in pensacola florida Great Freeze of 1894-5* when did a recent thunderstorm happen? UNANSWERABLE what are the effects of climate cycles? El Niño brings above average rainfall in the spring and is followed by wildfire threat when rain dries up.
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El Niño [SEP] Introduction
El Niño (; ) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (between approximately the International Date Line and 120°W), including the area off the Pacific coast of South America. The ENSO is the cycle of warm and cold sea surface temperature (SST) of the tropical central and eastern Pacific Ocean. El Niño is accompanied by high air pressure in the western Pacific and low air pressure in the eastern Pacific. El Niño phases are known to last close to four years, however, records demonstrate that the cycles have lasted between two and seven years.