Enso Diagram On Map

The three phases of the el ninosouthern oscillation enso the neutral phase in the neutral state neither el nino nor la nina trade winds blow east to west across the surface of the tropical pacific ocean bringing warm moist air and warmer surface waters towards the western pacific and keeping the central pacific ocean relatively cool. Monitoring of el nino and la nina requires observations from both the atmosphere and oceans. The maps opposite show rainfall patterns for sep oct nov southern hemisphere spring and for dec jan feb southern hemisphere winter generated from a merged analysis of precipitation from 1979 to 2003.

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The left side of each diagram is the western pacific ocean near asia and the right side is the eastern pacific ocean near south america.

Enso diagram on map. This section contains maps time series and other analyses useful for monitoring enso and identifying the presence of a shift into el nino or la nina. Schematic diagrams of el nino normal and la nina conditions. Where they improve on the existing grid data sets developed by other methods have been included. The top row shows the average daily rainfall that prevails for the given period and enso conditions.

The map is based upon bathymetry data from the gebco08 grid version 20100927 a global bathymetric grid with 30 arc second spacing. Redorange colors indicate warm ocean surface temperatures yellowgreenish colors indicate cooler temperatures. El nino and la nina are the warm and cool phases of a recurring climate pattern across the tropical pacificthe el nino southern oscillation or enso for short. These observations are often summarized in terms of various atmospheric and.

The grid is largely based upon a database of ship track soundings with interpolation between soundings guided by satellite derived gravity data. The bottom row shows how the values in the map above. Darker colors indicate more rain. The pattern can shift back and forth irregularly every two to seven years and each phase triggers predictable disruptions of temperature precipitation and winds.

The blue band is the thermocline approximately the location of water that is. Schematic diagram showing the physical mechanisms by which the sst shaded olr contours surface zonal and meridional winds vectors and sea level pressure represented by h and l which indicate the high and low pressure center respectively determine the wintertime multivariate enso index mei during a el nino and b la nina events.