A numerical study on amplitude characteristics of the terdiurnal tide excited by nonlinear interaction between the diurnal and semidiurnal tides

Huang, Chun Ming; Zhang, Shaodong; Yi, Fan

doi:10.1186/bf03353094

Cited by 18 publications

(23 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The excitation mechanisms of the TDT have been investigated by several model studies (Akmaev, 2001;Smith and Ortland, 2001;Huang et al, 2007;Du and Ward, 2010;Lilienthal et al, 2018) but with partly inconclusive results. This is most likely caused by different models and analysis techniques, e.g., Akmaev (2001) and Smith and Ortland (2001) use models with explicit lower boundary forcing of DT and SDT whereas the simulations of Du and Ward (2010) and Lilienthal et al (2018) are based on fully self-consistent tides.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation

Lilienthal

Jacobi

2019

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. We investigate the forcing mechanisms of the terdiurnal solar tide in the middle atmosphere using a mechanistic global circulation model. In order to quantify their individual contributions, we perform several model experiments and separate each forcing mechanism by switching off the remaining sources. We find that the primary excitation is owing to the terdiurnal component of solar radiation absorption in the troposphere and stratosphere. Secondary sources are nonlinear tide–tide interactions and gravity wave–tide interactions. Thus, although the solar heating clearly dominates the terdiurnal forcing in our simulations, we find that nonlinear tidal and gravity wave interactions contribute in certain seasons and at certain altitudes. By slightly enhancing the different excitation sources, we test the sensitivity of the background circulation to these changes of the dynamics. As a result, the increase of terdiurnal gravity wave drag can strongly affect the middle and upper atmosphere dynamics, including an irregular change of the terdiurnal amplitude, a weakening of neutral winds in the thermosphere, and a significant temperature change in the thermosphere, depending on the strength of the forcing. On the contrary, the influence of nonlinear tidal interactions on the middle atmosphere background dynamics is rather small.

show abstract

Section: Introductionmentioning

confidence: 99%

Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation

Lilienthal

Jacobi

2019

Ann. Geophys.

View full text Add to dashboard Cite

show abstract

“…The TDT is thought to be excited both directly by the terdiurnal component of solar radiative heating and indirectly by wave-wave interactions between the semidiurnal tide (SDT) and the diurnal tide (DT) (Teitelbaum et al 1989). Model studies indicate that nonlinear interactions contribute to the TDT preferably at low and midlatitudes (Smith and Ortland 2001;Huang et al 2007). The TDT amplitudes in wind are generally smaller than the ones of the SDT and DT; therefore, earlier investigations had focused on the latter ones, and the seasonal and global distribution of the TDT is not that well known.…”

Section: Introductionmentioning

confidence: 99%

Global distribution of the migrating terdiurnal tide seen in sporadic E occurrence frequencies obtained from GPS radio occultations

et al. 2014

View full text Add to dashboard Cite

Global Positioning System radio occultation measurements by FORMOsa SATellite mission-3/Constellation Observing System for Meteorology, Ionosphere and Climate satellites were used to analyse the characteristics of the 8-h oscillation in sporadic E (E S) layers. Six-year averages based on the 3-monthly mean zonal means from December 2006 to November 2012 were constructed for the amplitude of the terdiurnal oscillation in the occurrence frequency of E S. A global distribution from 60°S to 60°N is given, revealing two peaks above 100 km during solstice with one maximum at low and midlatitudes (approximately 10°to 40°) in each hemisphere. During equinox, the global distribution is marked by two dominant peaks centred at midlatitudes, while an additional weak maximum is located at very low southern latitudes. The seasonal characteristics around 110 km reveal large values during equinox at low and midlatitudes (<40°N), while further peaks occur in April at >40°S and in July near 30°S. The pattern around 90 km is dominated by a broad peak between 20°and 30°S from March to September. Comparisons with the terdiurnal oscillation in the neutral atmosphere derived from zonal wind and vertical zonal wind shear simulated with a circulation model of the middle atmosphere, as well as with satellite observations of the terdiurnal tide in temperature, fit quite well for the results above 100 km, but do not show agreement for lower altitudes.

show abstract

Section: Introductionmentioning

confidence: 99%

“…[8] Several works have investigated the terdiurnal tide using numerical models [Akmaev, 2001;Huang et al, 2007;Du and Ward, 2010;Smith and Ortland, 2001]. Akmaev [2001], Huang et al [2007], and Smith and Ortland [2001] all argue that excitation of TW3 is due to some combination of direct thermal forcing and nonlinear interaction between DW1 and SW2, although they disagree on the relative importance of these two mechanisms. On the one hand, Huang et al [2007] maintain that DW1-SW2 nonlinear interactions are the predominant forcing for TW3, while the Smith and Ortland [2001] model shows thermal forcing to be dominant for TW3 at middle and high latitudes and that nonlinear interactions contribute more to low-latitude TW3.…”

Section: Introductionmentioning

confidence: 99%

A decade‐long climatology of terdiurnal tides using TIMED/SABER observations

Moudden

Forbes

2013

JGR Space Physics

View full text Add to dashboard Cite

[1] In this paper, we globally characterize the solar terdiurnal tide in the 80-110 km region of Earth's atmosphere through analysis of 10 years of temperature measurements made by the Sounding of the Atmosphere using Broadband Emission Radiometry instrument on the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics spacecraft. The Sun-synchronous ("migrating") component (TW3), which is longitude-independent and achieves maximum amplitudes of order of 5 K (10 K) at 90 km (110 km), not too different than the 7-15 K amplitudes that are typical of the migrating diurnal and semidiurnal tides in this region. Significant longitude variability ( 20-25%) in terdiurnal temperature amplitudes also exists, which is decomposed into zonal wave number components. The largest of these (TE1, TW4, and TW5) reveal distinct seasonal-latitudinal and height versus latitude patterns and interannual consistency. In addition, it is demonstrated that these particular components vary in ways that suggest that they originate from nonlinear interactions between diurnal and semidiurnal tides, specifically between DE3 and SW2 for TE1, between DW2 and SW2 for TW4, and between DW1 and SW4 for TW5. We also demonstrate that the terdiurnal tides derived here are not influenced to any significant degree by aliasing due to the presence of other waves.

show abstract

A numerical study on amplitude characteristics of the terdiurnal tide excited by nonlinear interaction between the diurnal and semidiurnal tides

Cited by 18 publications

References 24 publications

Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation

Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation

Global distribution of the migrating terdiurnal tide seen in sporadic E occurrence frequencies obtained from GPS radio occultations

A decade‐long climatology of terdiurnal tides using TIMED/SABER observations

Contact Info

Product

Resources

About