The World's Eye in Search of the Invisible El Niño

The equatorial Pacific is so vast that a single ship or satellite cannot assess its condition. The NOAA Climate Prediction Center releases ENSO diagnostics by synthesizing sea temperature, wind, precipitation, and models, while the Pacific Marine Environmental Laboratory tracks changes in the sea surface and underwater via the TAO buoy array. The World Meteorological Organization compiles data from various countries to provide global forecasts, and the Australian Bureau of Meteorology and the Korea Meteorological Administration offer region-specific monitoring information.

The moored buoys that stay in one spot in the ocean, Argo floats that move up and down in the water column, and the Sentinel-6 satellite that broadly measures sea level height fill different gaps. This list not only names the organizations but also explains what each observation device measures and how the data leads to forecasts. For actual institutional locations, representative addresses and latitudes/longitudes have been inputted to distinguish research and presentation bases.

ENSO forecasts are created through collaboration among observation networks. Moored buoys display continuous changes at the same location, Argo fills in vertical temperature and salinity across the wide ocean, and satellites spatially connect sea level height and surface conditions. Research institutions manage data quality and input it into prediction models, while forecast centers examine commonalities and uncertainties among various models to provide probabilistic diagnostics.

Since the alarm names and criteria periods differ slightly by institution, comparing the colors of a single announcement can lead to confusion. It’s better to check the sea temperature, wind, and atmospheric responses of the same date, and to separately read about their impact on daily life in Korea in the seasonal forecast from the Meteorological Administration. Coordinates point to each institution’s representative base, and the scattered buoys and floats in the sea have not been assigned single tourist coordinates.