1 0 -120 8000000 Sea Surface Height Anomalies during El Nino/La Nina Event of 1997-1998 The El Nino/La Nina event in 1997-1999 was particularly intense, but was also very well observed by satellites and buoys. Changes in the normal height of the ocean's surface were observed by the TOPEX/Poseidon altimeter. Animation (1020x252) This animation shows El Nino and La Nina from 1997 through 1998. Each frame is a ten-day average of sea surface height (SSH) anomalies--that is, of differences from normal SSH values. The area shown in the animation is the Pacific ocean from -20.5 to +20.5 latitude and +120.5 to +289.5 East longitude. 1 0 1997-01-01 2000-01-05T23:59:59Z 1997-01-01 1 1 1997-01-01 1997-01-10T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0001.png -21 21 120 290.000000 1997-01-11 1 1 1997-01-11 1997-01-20T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0002.png -21 21 120 290.000000 1997-01-21 1 1 1997-01-21 1997-01-30T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0003.png -21 21 120 290.000000 1997-01-31 1 1 1997-01-31 1997-02-09T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0004.png -21 21 120 290.000000 1997-02-10 1 1 1997-02-10 1997-02-19T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0005.png -21 21 120 290.000000 1997-02-20 1 1 1997-02-20 1997-03-01T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0006.png -21 21 120 290.000000 1997-03-02 1 1 1997-03-02 1997-03-11T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0007.png -21 21 120 290.000000 1997-03-12 1 1 1997-03-12 1997-03-21T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0008.png -21 21 120 290.000000 1997-03-22 1 1 1997-03-22 1997-04-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0009.png -21 21 120 290.000000 1997-04-01 1 1 1997-04-01 1997-04-10T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0010.png -21 21 120 290.000000 1997-04-11 1 1 1997-04-11 1997-04-20T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0011.png -21 21 120 290.000000 1997-04-21 1 1 1997-04-21 1997-05-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0012.png -21 21 120 290.000000 1997-05-01 1 1 1997-05-01 1997-05-10T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0013.png -21 21 120 290.000000 1997-05-11 1 1 1997-05-11 1997-05-20T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0014.png -21 21 120 290.000000 1997-05-21 1 1 1997-05-21 1997-05-30T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0015.png -21 21 120 290.000000 1997-05-31 1 1 1997-05-31 1997-06-09T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0016.png -21 21 120 290.000000 1997-06-10 1 1 1997-06-10 1997-06-19T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0017.png -21 21 120 290.000000 1997-06-20 1 1 1997-06-20 1997-06-29T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0018.png -21 21 120 290.000000 1997-06-30 1 1 1997-06-30 1997-07-09T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0019.png -21 21 120 290.000000 1997-07-10 1 1 1997-07-10 1997-07-19T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0020.png -21 21 120 290.000000 1997-07-20 1 1 1997-07-20 1997-07-29T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0021.png -21 21 120 290.000000 1997-07-30 1 1 1997-07-30 1997-08-08T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0022.png -21 21 120 290.000000 1997-08-09 1 1 1997-08-09 1997-08-18T23:59:59Z http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003142/frames/1020x252/ssh1997-1999.0023.png -21 21 120 290.000000 1997-08-19 1 1 1997-08-19 1997-08-28T23:59:59Z 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