A Lorenz/Boer energy budget for the atmosphere of Mars from a "reanalysis" of spacecraft observations

Fachreddin Tabataba-Vakili; Peter L. Read; Stephen R. Lewis; Luca Montabone; Tao Ruan; Yixiong Wang; Alexandru Valeanu; Roland M.B. Young

doi:10.1002/2015GL065659

A Lorenz/Boer energy budget for the atmosphere of Mars from a "reanalysis" of spacecraft observations

Fachreddin Tabataba-Vakili, Peter L. Read, Stephen R. Lewis, Luca Montabone, Tao Ruan, Yixiong Wang, Alexandru Valeanu, Roland M.B. Young

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We calculate a Lorenz energy budget for the Martian atmosphere from reanalysis derived from Mars Global Surveyor data for Mars years 24-27. We present global, annual mean energy and conversion rates per unit area and per unit mass and compare these to Earth data. The directions of the energy conversion terms for Mars are similar to Earth, with the exception of the barotropic conversion between zonal and eddy kinetic energy reservoirs. Further, seasonal and hemispheric decomposition reveals a strong conversion between zonal energy reservoirs over the year, but these balance each other out in global and annual mean. On separating the diurnal timescale, the contribution to the conversion terms and eddy kinetic energy for diurnal and shorter timescales in many cases (especially during planet-encircling dust storms) exceeds the contribution of longer timescales. This suggests that thermal tides have a significant effect on the generation of eddy kinetic energy.

Original language	English
Pages (from-to)	8320-8327
Number of pages	8
Journal	Geophysical Research Letters
Volume	42
Issue number	20
DOIs	https://doi.org/10.1002/2015GL065659
Publication status	Published - Oct 28 2015
Externally published	Yes

Keywords

Lorenz energy cycle
Mars
diurnal tides
hemispheres
seasons

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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10.1002/2015GL065659

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title = "A Lorenz/Boer energy budget for the atmosphere of Mars from a {"}reanalysis{"} of spacecraft observations",

abstract = "We calculate a Lorenz energy budget for the Martian atmosphere from reanalysis derived from Mars Global Surveyor data for Mars years 24-27. We present global, annual mean energy and conversion rates per unit area and per unit mass and compare these to Earth data. The directions of the energy conversion terms for Mars are similar to Earth, with the exception of the barotropic conversion between zonal and eddy kinetic energy reservoirs. Further, seasonal and hemispheric decomposition reveals a strong conversion between zonal energy reservoirs over the year, but these balance each other out in global and annual mean. On separating the diurnal timescale, the contribution to the conversion terms and eddy kinetic energy for diurnal and shorter timescales in many cases (especially during planet-encircling dust storms) exceeds the contribution of longer timescales. This suggests that thermal tides have a significant effect on the generation of eddy kinetic energy.",

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AU - Tabataba-Vakili, Fachreddin

AU - Read, Peter L.

AU - Lewis, Stephen R.

AU - Montabone, Luca

AU - Ruan, Tao

AU - Wang, Yixiong

AU - Valeanu, Alexandru

AU - Young, Roland M.B.

PY - 2015/10/28

Y1 - 2015/10/28

N2 - We calculate a Lorenz energy budget for the Martian atmosphere from reanalysis derived from Mars Global Surveyor data for Mars years 24-27. We present global, annual mean energy and conversion rates per unit area and per unit mass and compare these to Earth data. The directions of the energy conversion terms for Mars are similar to Earth, with the exception of the barotropic conversion between zonal and eddy kinetic energy reservoirs. Further, seasonal and hemispheric decomposition reveals a strong conversion between zonal energy reservoirs over the year, but these balance each other out in global and annual mean. On separating the diurnal timescale, the contribution to the conversion terms and eddy kinetic energy for diurnal and shorter timescales in many cases (especially during planet-encircling dust storms) exceeds the contribution of longer timescales. This suggests that thermal tides have a significant effect on the generation of eddy kinetic energy.

AB - We calculate a Lorenz energy budget for the Martian atmosphere from reanalysis derived from Mars Global Surveyor data for Mars years 24-27. We present global, annual mean energy and conversion rates per unit area and per unit mass and compare these to Earth data. The directions of the energy conversion terms for Mars are similar to Earth, with the exception of the barotropic conversion between zonal and eddy kinetic energy reservoirs. Further, seasonal and hemispheric decomposition reveals a strong conversion between zonal energy reservoirs over the year, but these balance each other out in global and annual mean. On separating the diurnal timescale, the contribution to the conversion terms and eddy kinetic energy for diurnal and shorter timescales in many cases (especially during planet-encircling dust storms) exceeds the contribution of longer timescales. This suggests that thermal tides have a significant effect on the generation of eddy kinetic energy.

KW - Lorenz energy cycle

KW - Mars

KW - diurnal tides

KW - hemispheres

KW - seasons

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A Lorenz/Boer energy budget for the atmosphere of Mars from a "reanalysis" of spacecraft observations

Abstract

Keywords

ASJC Scopus subject areas

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