Forcing mechanisms of the terdiurnal tide
<p>Using a nonlinear mechanistic global circulation model we analyze the migrating terdiurnal tide in the middle atmosphere with respect to its possible forcing mechanisms, i.e., the absorption of solar radiation in the water vapor and ozone band, nonlinear tidal interactions, and gravity...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/15725/2018/acp-18-15725-2018.pdf |
| _version_ | 1818036173937836032 |
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| author | F. Lilienthal C. Jacobi C. Geißler |
| author_facet | F. Lilienthal C. Jacobi C. Geißler |
| author_sort | F. Lilienthal |
| collection | DOAJ |
| description | <p>Using a nonlinear mechanistic global circulation model we analyze the
migrating terdiurnal tide in the middle atmosphere with respect to its
possible forcing mechanisms, i.e., the absorption of solar radiation in the
water vapor and ozone band, nonlinear tidal interactions, and gravity
wave–tide interactions. In comparison to the forcing mechanisms of diurnal
and semidiurnal tides, these terdiurnal forcings are less well understood and
there are contradictory opinions about their respective relevance. In our
simulations we remove the wave number 3 pattern for each forcing individually
and analyze the remaining tidal wind and temperature fields. We find that the
direct solar forcing is dominant and explains most of the migrating
terdiurnal tide's amplitude. Nonlinear interactions due to other tides or
gravity waves are most important during local winter. Further analyses show
that the nonlinear forcings are locally counteracting the solar forcing due
to destructive interferences. Therefore, tidal amplitudes can become even
larger for simulations with removed nonlinear forcings.</p> |
| first_indexed | 2024-12-10T07:06:45Z |
| format | Article |
| id | doaj.art-e27b9f290625498784ce0c4f48edb7f5 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-10T07:06:45Z |
| publishDate | 2018-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-e27b9f290625498784ce0c4f48edb7f52022-12-22T01:58:10ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-11-0118157251574210.5194/acp-18-15725-2018Forcing mechanisms of the terdiurnal tideF. Lilienthal0C. Jacobi1C. Geißler2Institute for Meteorology, Universität Leipzig, Stephanstr. 3, 04103 Leipzig, GermanyInstitute for Meteorology, Universität Leipzig, Stephanstr. 3, 04103 Leipzig, GermanyInstitute for Meteorology, Universität Leipzig, Stephanstr. 3, 04103 Leipzig, Germany<p>Using a nonlinear mechanistic global circulation model we analyze the migrating terdiurnal tide in the middle atmosphere with respect to its possible forcing mechanisms, i.e., the absorption of solar radiation in the water vapor and ozone band, nonlinear tidal interactions, and gravity wave–tide interactions. In comparison to the forcing mechanisms of diurnal and semidiurnal tides, these terdiurnal forcings are less well understood and there are contradictory opinions about their respective relevance. In our simulations we remove the wave number 3 pattern for each forcing individually and analyze the remaining tidal wind and temperature fields. We find that the direct solar forcing is dominant and explains most of the migrating terdiurnal tide's amplitude. Nonlinear interactions due to other tides or gravity waves are most important during local winter. Further analyses show that the nonlinear forcings are locally counteracting the solar forcing due to destructive interferences. Therefore, tidal amplitudes can become even larger for simulations with removed nonlinear forcings.</p>https://www.atmos-chem-phys.net/18/15725/2018/acp-18-15725-2018.pdf |
| spellingShingle | F. Lilienthal C. Jacobi C. Geißler Forcing mechanisms of the terdiurnal tide Atmospheric Chemistry and Physics |
| title | Forcing mechanisms of the terdiurnal tide |
| title_full | Forcing mechanisms of the terdiurnal tide |
| title_fullStr | Forcing mechanisms of the terdiurnal tide |
| title_full_unstemmed | Forcing mechanisms of the terdiurnal tide |
| title_short | Forcing mechanisms of the terdiurnal tide |
| title_sort | forcing mechanisms of the terdiurnal tide |
| url | https://www.atmos-chem-phys.net/18/15725/2018/acp-18-15725-2018.pdf |
| work_keys_str_mv | AT flilienthal forcingmechanismsoftheterdiurnaltide AT cjacobi forcingmechanismsoftheterdiurnaltide AT cgeißler forcingmechanismsoftheterdiurnaltide |