What question did this study set out to answer?

To calculate the spectral transports of sensible heat and momentum, as well as the conversions of available potential energy and kinetic energy between zonal flow and eddies across different seasons.

January 1, 1964Tellus A Dynamic Meteorology and OceanographyOpen Access

Further studies of energy exchange between the zonal flow and the eddies

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Authors

AWA. Wiin‐NielsenUniversity of Michigan JBJohn A. BrownNSF National Center for Atmospheric Research MDMargaret DrakeNSF National Center for Atmospheric Research

Discussion

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Implication

Observational analysis reveals seasonal energy conversions between zonal flows and eddies across atmospheric wave numbers, highlighting the dominant role of planetary waves in winter heat transport.

Key Points

To calculate the spectral transports of sensible heat and momentum, as well as the conversions of available potential energy and kinetic energy between zonal flow and eddies across different seasons.
Evaluated five atmospheric pressure levels for April, July, and October 1962 and January 1963, combined with two-level data (850 and 500 mb) for January 1959 and April, July, and October 1961.
Computed sensible heat and momentum transport alongside energy exchanges in the wave number regime using harmonic spectral analysis.
Sensible heat and momentum transports are heavily dominated by long planetary waves (wave numbers 2–3) during winter, while these waves account for a significantly smaller fraction during other seasons.
Zonal to eddy available potential energy exchange was consistently positive across all months and wave numbers, reaching seasonal maxima in winter at wave numbers 2–3 and minima in summer at shorter wavelengths.
Eddy to zonal kinetic energy exchange peaked in autumn and was generally positive but smaller than potential energy exchange, reversing to a net negative conversion in January 1963 primarily driven by wave number 3.

Cite This Study

Wiin‐Nielsen et al. (1964) studied this question.

synapsesocial.com/papers/6a6bfd0c547974b2dbf4736d https://doi.org/10.3402/tellusa.v16i2.8923

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January 1, 1964Tellus A Dynamic Meteorology and OceanographyOpen Access

Further studies of energy exchange between the zonal flow and the eddies

View Full Paper

Ask AI

Bookmark

Authors

AWA. Wiin‐NielsenUniversity of Michigan JBJohn A. BrownNSF National Center for Atmospheric Research MDMargaret DrakeNSF National Center for Atmospheric Research

Discussion

Member takes

Implication

Observational analysis reveals seasonal energy conversions between zonal flows and eddies across atmospheric wave numbers, highlighting the dominant role of planetary waves in winter heat transport.

Key Points

To calculate the spectral transports of sensible heat and momentum, as well as the conversions of available potential energy and kinetic energy between zonal flow and eddies across different seasons.
Evaluated five atmospheric pressure levels for April, July, and October 1962 and January 1963, combined with two-level data (850 and 500 mb) for January 1959 and April, July, and October 1961.
Computed sensible heat and momentum transport alongside energy exchanges in the wave number regime using harmonic spectral analysis.
Sensible heat and momentum transports are heavily dominated by long planetary waves (wave numbers 2–3) during winter, while these waves account for a significantly smaller fraction during other seasons.
Zonal to eddy available potential energy exchange was consistently positive across all months and wave numbers, reaching seasonal maxima in winter at wave numbers 2–3 and minima in summer at shorter wavelengths.
Eddy to zonal kinetic energy exchange peaked in autumn and was generally positive but smaller than potential energy exchange, reversing to a net negative conversion in January 1963 primarily driven by wave number 3.

Cite This Study

Wiin‐Nielsen et al. (1964) studied this question.

synapsesocial.com/papers/6a6bfd0c547974b2dbf4736d https://doi.org/10.3402/tellusa.v16i2.8923

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