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Visualizing the QBO

Visualizing the QBO. Jon Schrage ATS 553. Quasibiennial Oscillation. Occurs in the tropical stratosphere Only the zonal component of the wind. From Climate Diagnostics Bulletin. http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/bulletin/figt3.html. QBO. Period = 26 months

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Visualizing the QBO

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  1. Visualizing the QBO Jon Schrage ATS 553

  2. Quasibiennial Oscillation • Occurs in the tropical stratosphere • Only the zonal component of the wind

  3. From Climate Diagnostics Bulletin http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/bulletin/figt3.html

  4. QBO • Period = 26 months • These anomalies propagate downward at about 1 km / month

  5. http://tao.atmos.washington.edu/data_sets/qbo/

  6. Stratosphere 30mb 100mb Tropopause Troposphere

  7. QBO • Limited to the deep tropics • Not a function of latitude • Suggests that it might be a type of Kelvin Wave

  8. However: • Climate models are NOT able to produce a QBO, despite the fact that models are good at making Kelvin Waves.

  9. Current Thinking: • The radiative impacts of ozone are important in maintaining the Kelvin Wave.

  10. Why We Care: • May have impacts and implications for long range forecasting. • Has an influence on tropical cyclogenesis and is used by Bill Gray in his forecasts.

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