Troposphere‐thermosphere tidal coupling as measured by the SABER instrument on TIMED during July–September 2002

Forbes, Jeffrey M.; Russell, James M.; Miyahara, S.; Zhang, X.; Palo, S. E.; Mlynczak, M. G.; Mertens, C. J.; Hagan, M. E.

doi:10.1029/2005ja011492

Cited by 175 publications

(224 citation statements)

References 63 publications

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“…The ozone profiles are retrieved from the 9.6 µm channel, in the vertical range ∼12-∼100 km with a vertical spacing of ∼0.4 km. The temperature and wind data have been used extensively for comparisons and scientific publications (e.g., Sica et al, 2008;Forbes et al, 2006;Petelina et al, 2005b;Mertens et al, 2004). However, at the time of writing, there are no published comparisons for the SABER trace gas data.…”

Section: Timed/sabermentioning

confidence: 99%

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

145

126

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Abstract. This paper presents extensive bias determination analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloonborne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45-60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within ±10% (average values within ±6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (∼35-55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45-55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.

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Section: Timed/sabermentioning

confidence: 99%

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

145

126

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“…In the universal time (UT) frame, these tides can be expressed as (Forbes et al, 2006) A n, s cos(n t + sλ − φ n, s ),…”

Section: Y-l Zhou Et Al: Solar Activity Dependence Of Nonmigratingmentioning

confidence: 99%

The solar activity dependence of nonmigrating tides in electron density at low and middle latitudes observed by CHAMP and GRACE

et al. 2016

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Abstract. In this paper we use more than a decade of in situ electron density observations from CHAMP and GRACE satellites to investigate the solar activity dependence of nonmigrating tides at both low and middle latitudes. The results indicate that the longitudinal patterns of F region electron density vary with season and latitude, which are exhibiting a wavenumber 4 (WN4) pattern around September equinox at low latitudes and WN1/WN2 patterns during local summer at the southern/northern middle latitudes. These wave patterns in the F region ionosphere can clearly be seen during both solar maximum and minimum years. At low latitudes the absolute amplitudes of DE3 (contributing to the WN4 pattern) are found to be highly related to the solar activity, showing larger amplitudes during solar maximum years. Similarly a solar activity dependence can also be found for the absolute amplitudes of D0, DW2 and DE1 (contributing to the WN1 and WN2 pattern) at middle latitudes. The relative amplitudes (normalized by the zonal mean) of these nonmigrating tides at both low and middle altitudes show little dependence on solar activity. We further found a clear modulation by the quasi-biennial oscillation (QBO) of the relative DE3 amplitudes in both satellite observations, which is consistent with the QBO dependence as reported for the E region temperatures and zonal wind. It also supports the strong coupling of the low-latitude nonmigrating tidal activity between the E and F regions. However, the QBO dependence cannot be found for the relative amplitudes of the nonmigrating tides at middle latitudes, which implies that these tides are generated in situ at F region altitudes.

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“…The general mathematical formulation of the relationship between longitudinal patterns in satellite observations and the non-migrating tidal description in the Earth-fixed frame is given by Forbes et al (2006) and Häusler and Lühr (2009). In this study, the thermospheric mass density and zonal wind data has been first sorted into longitude (15 • ) × local time (1 h) bins.…”

Section: Processing Approachmentioning

confidence: 99%

“…Due to the rapid development of the upper atmospheric observations in the past decade, significant progress has been made in the investigation of the coupling of the upper atmosphere and ionosphere. At equatorial and low latitude regions, the longitudinal wavenumber-4 (WN4) and wavenumber-3 (WN3) patterns have been widely studied, based on model simulations and observations from sunsynchronous and slowly precessing platforms in space (e.g., Sagawa et al, 2005;Immel et al, 2006;England et al, 2006England et al, , 2010Forbes et al, 2006;Lühr et al, 2008Lühr et al, , 2012Oberheide et al, 2009Oberheide et al, , 2011bLiu et al, 2009;Häusler and Lühr, 2009). These WN4/WN3 patterns are considered to be associated with the eastward-propagating non-migrating tides DE3/DE2, that are primary excited by latent heat release in the tropical troposphere (Hagan and Forbes, 2003;Wan et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Tidal signatures of the thermospheric mass density and zonal wind at midlatitude: CHAMP and GRACE observations

et al. 2015

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Abstract. By using the accelerometer measurements from CHAMP and GRACE satellites, the tidal signatures of the thermospheric mass density and zonal wind at midlatitudes have been analyzed in this study. The results show that the mass density and zonal wind at southern midlatitudes are dominated by a longitudinal wave-1 pattern. The most prominent tidal components in mass density and zonal wind are the diurnal tides D0 and DW2 and the semidiurnal tides SW1 and SW3. This is consistent with the tidal signatures in the F region electron density at midlatitudes as reported by Xiong and Lühr (2014). These same tidal components are observed both in the thermospheric and ionospheric quantities, supporting a mechanism that the non-migrating tides in the upper atmosphere are excited in situ by ion-neutral interactions at midlatitudes, consistent with the modeling results of Jones Jr. et al. (2013). We regard the thermospheric dynamics as the main driver for the electron density tidal structures. An example is the in-phase variation of D0 between electron density and mass density in both hemispheres. Further research including coupled atmospheric models is probably needed for explaining the similarities and differences between thermospheric and ionospheric tidal signals at midlatitudes.

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Troposphere‐thermosphere tidal coupling as measured by the SABER instrument on TIMED during July–September 2002

Cited by 175 publications

References 63 publications

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

The solar activity dependence of nonmigrating tides in electron density at low and middle latitudes observed by CHAMP and GRACE

Tidal signatures of the thermospheric mass density and zonal wind at midlatitude: CHAMP and GRACE observations

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