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Quasi-Biennial Oscillations in Tropospheric Energy

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  • 1 Air Resources Laboratories, Environmental Research Laboratories, NOAA, Silver Spring, Md. 20910
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Abstract

Evidence is presented for an approximate year-to-year variation of the zonal available potential (AZ), eddy available potential (AE), zonal kinetic (KZ) and eddy kinetic energy (KE) in the extra-tropical troposphere between 1962 and 1971. A modification of the oscillations occurs after 1968 due to as yet undetermined causes, but prior to this there is a fairly significant correlation between these oscillations and the quasi-biennial zonal wind variation in the low tropical stratosphere. The results indicate a relative in-phase relationship between the AZ, KZ and AE, KE terms and a relative out-of-phase relationship between the AZ, AE and KZ, KE terms.

Abstract

Evidence is presented for an approximate year-to-year variation of the zonal available potential (AZ), eddy available potential (AE), zonal kinetic (KZ) and eddy kinetic energy (KE) in the extra-tropical troposphere between 1962 and 1971. A modification of the oscillations occurs after 1968 due to as yet undetermined causes, but prior to this there is a fairly significant correlation between these oscillations and the quasi-biennial zonal wind variation in the low tropical stratosphere. The results indicate a relative in-phase relationship between the AZ, KZ and AE, KE terms and a relative out-of-phase relationship between the AZ, AE and KZ, KE terms.

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