The Interannual Relationship between the Latitude of the Eddy-Driven Jet and the Edge of the Hadley Cell
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- The Interannual Relationship between the Latitude of the Eddy-Driven Jet and the Edge of the Hadley Cell
- Kang, Sarah M.; Polvani, Lorenzo M.
- Atmospheric circulation; Climate change; Eddies; Interannual variability; Jets
- Issue Date
- AMER METEOROLOGICAL SOC
- JOURNAL OF CLIMATE, v.24, no.2, pp.563 - 568
- A strong correlation between the latitudes of the eddy-driven jet and of the Hadley cell edge, on interannual time scales, is found to exist during austral summer, in both the NCEP-NCAR reanalysis and the models participating in the Coupled Model Intercomparison Project, phase 3 (CMIP3). In addition, a universal ratio close to 1:2 characterizes the robust connection between these two latitudes on a year-to-year basis: for a 2 degrees shift of the eddy-driven jet, the edge of the Hadley cell shifts by 1 degrees. This 1:2 interannual ratio remains the same in response to climate change, even though the values of the two latitudes increase. The corresponding trends are also highly correlated; in the CMIP3 scenario integrations, however, no universal ratio appears to exist connecting these long-term trends. In austral winter and in the Northern Hemisphere, no strong interannual correlations are found.
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