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# Unit 2 Introductory PPT Slides

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Slides to help introduce the activities in Unit 2.

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• About seventy TAO/TRITON buoys collect meteorological data in the equatorial Pacific Ocean between the Galapagos Islands and New Guinea. Scientists retrieve the data in real time via satellite.
• Use this slide to introduce students to the type of data they will be looking at. The most difficult aspects of interpreting these maps lie in understanding wind anomalies. Without going into the definition of a vector, indicate to students that they should understand that the length of the wind anomaly error tells us about the size of the anomaly, and that the direction of the anomaly arrow tells us how the wind direction is different from normal or average.
• ### Unit 2 Introductory PPT Slides

1. 1. Ocean buoys collect data over many years – changes in the atmosphere and ocean over many years provide clues to climate variability. We need to look at the ANOMALIES to identify variability. Anomaly: Difference from normal (or difference from the average conditions) Climate of Change – Unit 2: Deciphering Climate Variability NOAA Image
2. 2. The TAO/TRITON buoys are in an area of the Pacific where there are few islands or ships to collect weather data. Japan maintains 15 of the buoys (labeled TRITON below). The other 55 are maintained by the United States, through the National Data Buoy Center, which is a division of NOAA. Climate of Change – Unit 2: Deciphering Climate Variability NOAA Image
3. 3. Instruments on the TAO/TRITON buoys measure sea-surface temperature, wind speed and direction, relative humidity, air temperature, and subsurface temperatures in the upper 500 meters of the ocean. The buoys are moored in place with an anchor. Climate of Change – Unit 2: Deciphering Climate Variability NOAA Image
4. 4. Six to eight times a year, scientists and technicians go out on the NOAA ship Ka’imimoana to repair and replace buoys along different sections of the array. Climate of Change – Unit 2: Deciphering Climate Variability NOAA Image
5. 5. (Averages) Arrows depict wind strength and direction (longer arrow = stronger wind) TAO/TRITON Monthly Sea Surface Temp (SST) in °C and Winds (m/s2) Long arrows indicate wind is stronger than average (and in same direction) Short arrows indicate wind is similar to the long-term average Climate of Change – Unit 2: Deciphering Climate Variability