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Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24
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| Zeitschriftentitel: | Journal of Geophysical Research: Planets |
|---|---|
| Personen und Körperschaften: | |
| In: | Journal of Geophysical Research: Planets, 123, 2018, 7, S. 1732-1745 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Wang, H. Wang, H. |
|---|---|
| author |
Wang, H. |
| spellingShingle |
Wang, H. Journal of Geophysical Research: Planets Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Geochemistry and Petrology Geophysics |
| author_sort |
wang, h. |
| spelling |
Wang, H. 2169-9097 2169-9100 American Geophysical Union (AGU) Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Geochemistry and Petrology Geophysics http://dx.doi.org/10.1029/2018je005623 <jats:title>Abstract</jats:title><jats:p>The relationship between frontal/flushing dust storms and northern hemisphere synoptic period transient eddies in Mars year 24 is examined in this paper. Frontal dust storms are observed roughly continuously during the presolstice (early/middle fall) and postsolstice (middle/late winter) time periods, but flushing dust storms that cross the equator are confined to shorter seasonal windows on both sides of the solsticial pause. In the lower atmosphere, the timing of cross‐equatorial flushing dust storms correlates better with eddy temperature than with eddy meridional wind; in the middle atmosphere, it correlates better with eddy meridional wind than with eddy temperature. This is because both the lower atmosphere eddy temperature and the middle atmosphere eddy meridional wind are dominated by zonal wave number <jats:italic>m</jats:italic> = 3 eastward traveling waves during the cross‐equatorial flushing dust storm periods. Frontal dust storms do not seem to be limited to any particular wave mode, but cross‐equatorial flushing dust storms appear to be closely related to <jats:italic>m</jats:italic> = 3 eastward traveling waves, at least in Mars year 24. The effectiveness of <jats:italic>m</jats:italic> = 3 waves in this regard is partially due to their amplitudes but more importantly due to their seasonal distributions and latitudinal positions. During the time periods when <jats:italic>m</jats:italic> = 3 waves are strong, the <jats:italic>m</jats:italic> = 3 waves are also located at lower latitudes, closer in distance to the fairly strong southward mean meridional wind in the low latitudes. Dust in frontal dust storms at high latitudes can be easily entrained into the low‐latitude circulation and be efficiently transported southward.</jats:p> Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 Journal of Geophysical Research: Planets |
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10.1029/2018je005623 |
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American Geophysical Union (AGU), 2018 |
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American Geophysical Union (AGU), 2018 |
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2169-9097 2169-9100 |
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| title |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_unstemmed |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_full |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_fullStr |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_full_unstemmed |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_short |
Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_sort |
cross‐equatorial flushing dust storms and northern hemisphere transient eddies: an analysis for mars year 24 |
| topic |
Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Geochemistry and Petrology Geophysics |
| url |
http://dx.doi.org/10.1029/2018je005623 |
| publishDate |
2018 |
| physical |
1732-1745 |
| description |
<jats:title>Abstract</jats:title><jats:p>The relationship between frontal/flushing dust storms and northern hemisphere synoptic period transient eddies in Mars year 24 is examined in this paper. Frontal dust storms are observed roughly continuously during the presolstice (early/middle fall) and postsolstice (middle/late winter) time periods, but flushing dust storms that cross the equator are confined to shorter seasonal windows on both sides of the solsticial pause. In the lower atmosphere, the timing of cross‐equatorial flushing dust storms correlates better with eddy temperature than with eddy meridional wind; in the middle atmosphere, it correlates better with eddy meridional wind than with eddy temperature. This is because both the lower atmosphere eddy temperature and the middle atmosphere eddy meridional wind are dominated by zonal wave number <jats:italic>m</jats:italic> = 3 eastward traveling waves during the cross‐equatorial flushing dust storm periods. Frontal dust storms do not seem to be limited to any particular wave mode, but cross‐equatorial flushing dust storms appear to be closely related to <jats:italic>m</jats:italic> = 3 eastward traveling waves, at least in Mars year 24. The effectiveness of <jats:italic>m</jats:italic> = 3 waves in this regard is partially due to their amplitudes but more importantly due to their seasonal distributions and latitudinal positions. During the time periods when <jats:italic>m</jats:italic> = 3 waves are strong, the <jats:italic>m</jats:italic> = 3 waves are also located at lower latitudes, closer in distance to the fairly strong southward mean meridional wind in the low latitudes. Dust in frontal dust storms at high latitudes can be easily entrained into the low‐latitude circulation and be efficiently transported southward.</jats:p> |
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| author | Wang, H. |
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| description | <jats:title>Abstract</jats:title><jats:p>The relationship between frontal/flushing dust storms and northern hemisphere synoptic period transient eddies in Mars year 24 is examined in this paper. Frontal dust storms are observed roughly continuously during the presolstice (early/middle fall) and postsolstice (middle/late winter) time periods, but flushing dust storms that cross the equator are confined to shorter seasonal windows on both sides of the solsticial pause. In the lower atmosphere, the timing of cross‐equatorial flushing dust storms correlates better with eddy temperature than with eddy meridional wind; in the middle atmosphere, it correlates better with eddy meridional wind than with eddy temperature. This is because both the lower atmosphere eddy temperature and the middle atmosphere eddy meridional wind are dominated by zonal wave number <jats:italic>m</jats:italic> = 3 eastward traveling waves during the cross‐equatorial flushing dust storm periods. Frontal dust storms do not seem to be limited to any particular wave mode, but cross‐equatorial flushing dust storms appear to be closely related to <jats:italic>m</jats:italic> = 3 eastward traveling waves, at least in Mars year 24. The effectiveness of <jats:italic>m</jats:italic> = 3 waves in this regard is partially due to their amplitudes but more importantly due to their seasonal distributions and latitudinal positions. During the time periods when <jats:italic>m</jats:italic> = 3 waves are strong, the <jats:italic>m</jats:italic> = 3 waves are also located at lower latitudes, closer in distance to the fairly strong southward mean meridional wind in the low latitudes. Dust in frontal dust storms at high latitudes can be easily entrained into the low‐latitude circulation and be efficiently transported southward.</jats:p> |
| doi_str_mv | 10.1029/2018je005623 |
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| imprint | American Geophysical Union (AGU), 2018 |
| imprint_str_mv | American Geophysical Union (AGU), 2018 |
| institution | DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Zwi2, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229 |
| issn | 2169-9097, 2169-9100 |
| issn_str_mv | 2169-9097, 2169-9100 |
| language | English |
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| physical | 1732-1745 |
| publishDate | 2018 |
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| publisher | American Geophysical Union (AGU) |
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| series | Journal of Geophysical Research: Planets |
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| spelling | Wang, H. 2169-9097 2169-9100 American Geophysical Union (AGU) Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Geochemistry and Petrology Geophysics http://dx.doi.org/10.1029/2018je005623 <jats:title>Abstract</jats:title><jats:p>The relationship between frontal/flushing dust storms and northern hemisphere synoptic period transient eddies in Mars year 24 is examined in this paper. Frontal dust storms are observed roughly continuously during the presolstice (early/middle fall) and postsolstice (middle/late winter) time periods, but flushing dust storms that cross the equator are confined to shorter seasonal windows on both sides of the solsticial pause. In the lower atmosphere, the timing of cross‐equatorial flushing dust storms correlates better with eddy temperature than with eddy meridional wind; in the middle atmosphere, it correlates better with eddy meridional wind than with eddy temperature. This is because both the lower atmosphere eddy temperature and the middle atmosphere eddy meridional wind are dominated by zonal wave number <jats:italic>m</jats:italic> = 3 eastward traveling waves during the cross‐equatorial flushing dust storm periods. Frontal dust storms do not seem to be limited to any particular wave mode, but cross‐equatorial flushing dust storms appear to be closely related to <jats:italic>m</jats:italic> = 3 eastward traveling waves, at least in Mars year 24. The effectiveness of <jats:italic>m</jats:italic> = 3 waves in this regard is partially due to their amplitudes but more importantly due to their seasonal distributions and latitudinal positions. During the time periods when <jats:italic>m</jats:italic> = 3 waves are strong, the <jats:italic>m</jats:italic> = 3 waves are also located at lower latitudes, closer in distance to the fairly strong southward mean meridional wind in the low latitudes. Dust in frontal dust storms at high latitudes can be easily entrained into the low‐latitude circulation and be efficiently transported southward.</jats:p> Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 Journal of Geophysical Research: Planets |
| spellingShingle | Wang, H., Journal of Geophysical Research: Planets, Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Geochemistry and Petrology, Geophysics |
| title | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_full | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_fullStr | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_full_unstemmed | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_short | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| title_sort | cross‐equatorial flushing dust storms and northern hemisphere transient eddies: an analysis for mars year 24 |
| title_unstemmed | Cross‐Equatorial Flushing Dust Storms and Northern Hemisphere Transient Eddies: An Analysis for Mars Year 24 |
| topic | Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Geochemistry and Petrology, Geophysics |
| url | http://dx.doi.org/10.1029/2018je005623 |