OH airglow phenomena during the 5–6 July 1982 total lunar eclipse

Peterson, A. W.; Adams, G. W.

doi:10.1364/ao.22.002682

Cited by 22 publications

(11 citation statements)

References 5 publications

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“…Ripples typically have small horizontal wavelengths less than 16 km [ Peterson and Adams , 1983]. Some other boundaries of horizontal wavelength between gravity waves (bands) and ripples have been suggested in previous papers (e.g., 17.5 km [ Nakamura et al , 1999], 15 km [ Yue et al , 2010]).…”

Section: Resultsmentioning

confidence: 98%

Short-period gravity waves and ripples in the South Pole mesosphere

Suzuki¹,

Tsutsumi²,

Palo³

et al. 2011

J. Geophys. Res.

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[1] In this study, we determined the characteristics of mesospheric wave structures over South Pole Station (90°S) derived from sodium airglow imaging observations. During the winter months of 2003 to 2005 (105 nights), we extracted a total of 768 wave events and separated them into two types (band-type gravity waves and ripples) according to their horizontal wavelengths. The distributions of the observed wave parameters, except for the horizontal propagation directions, were similar to those obtained by imaging observations at other latitudes. The observed gravity waves showed a preference for propagation toward 30°-60°E and 210°-240°E, whereas the ripples showed a preference for motion toward 90°-120°E and 300°-330°E. The gravity waves had a weak tendency of being observed in 0100-0700 UT, although the ripples did not show such a time dependence. We also investigated the characteristics of atmospheric instabilities from the alignment of the phase fronts of the observed ripples.

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Section: Resultsmentioning

confidence: 98%

Short-period gravity waves and ripples in the South Pole mesosphere

Suzuki¹,

Tsutsumi²,

Palo³

et al. 2011

J. Geophys. Res.

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“…The features currently referred to in the literature as ripples (Figure 2) have been defined as having horizontal wavelengths of between 5 and 20 km. It has been noted that ripples sometimes appear only in portions of airglow images for a limited period of time (less than 45 min but sometimes for only a few minutes) [ Peterson , 1979; Peterson and Adams , 1983; Clairemidi et al , 1985; Taylor and Hapgood , 1990; Taylor and Hill , 1991; Taylor et al , 1995, 1997; Nakamura et al , 1999]. They were first referred to as ripples by Peterson [1979], who thought they might be associated with atmospheric lunar tides.…”

Section: Airglow Imaging Observationsmentioning

confidence: 99%

“… Peterson and Kieffabber [1973] were the first to show that such images of the night sky often showed wavelike patterns of bright and dark areas perturbing the airglow emission. Since that work, airglow imaging has become the standard technique for investigating these two‐dimensional structures that are often present in the 80–105 km altitude region over the entire night sky from horizon to horizon; see, for example, the following studies (and references therein): Peterson and Kieffabber [1973], Moreels and Herse [1977], Peterson [1979], Armstrong [1982], Peterson and Adams [1983], Clairemidi et al [1985], Taylor et al [1987], Taylor and Hapgood [1990], Taylor and Hill [1991], Wiens et al [1993], Hecht et al [1994], Swenson and Mende [1994], Hecht et al [1995], Swenson et al [1995], Taylor et al [1995], Gardner et al [1996], Wu and Killeen [1996], Garcia et al [1997], Hecht et al [1997a], Isler et al [1997], Taylor et al [1997], Gardner and Taylor [1998], Nakamura et al [1999], Shiokawa et al [1999], Swenson et al [1999], Walterscheid et al [1999], Frey et al [2000], Hecht et al [2000], and Smith et al [2000].…”

Section: Introductionmentioning

confidence: 99%

Instability layers and airglow imaging

Hecht

2004

Reviews of Geophysics

113

164

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For over 30 years it has been recognized that atmospheric gravity waves (AGWs) in the 80–110 km region significantly perturb the basic atmospheric state, perhaps causing instability regions and subsequent turbulence. It has also been recognized for nearly as long that AGWs cause strong fluctuations in the airglow emissions that originate in this altitude region. Airglow images have been obtained since 1973, and they have shown structures that have mainly been attributed to the passage of AGWs through this region as predicted theoretically. The AGWs have been assumed to originate largely in the troposphere because of either convective activity or the flow of air over large mountain ranges. However, intensive analysis of the properties of a class of small‐scale features currently known as ripples [Taylor et al., 1997; Nakamura et al., 1999] suggests that these features are not AGWs but are rather instability features generated in situ. The basis for this hypothesis is examined in this review, and it is concluded that while there is support for the instability hypothesis as the origin of ripple features, at present the exact nature of the instabilities causing these features is not known.

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“…The ripples, which were first identified by Peterson and Kieffaber [] in OH airglow images, are the small‐scale wavelike patterns with bright and dark areas perturbing the airglow emission. These structures typically contain 3–10 wavecrests with horizontal wavelength of 5–15 km and lifetime of a few minutes up to 45 min [ Peterson and Adams , ; Adams et al ., ] and have been extensively investigated in the literature [ Taylor and Hapgood , ; Taylor et al ., , ; Hecht et al ., , ; Hecht , ; F. Li et al ., ; T. Li et al ., ; Hecht et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of ripple structures revealed in OH airglow images

Dou

et al. 2017

JGR Space Physics

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Small‐scale ripple structures observed in OH airglow images are most likely induced by either dynamic instability due to large wind shear or convective instability due to superadiabatic lapse rate. Using the data set taken in the mesopause region with an OH all‐sky imager at Yucca Ridge Field Station, Colorado (40.7°N, 104.9°W), from September 2003 to December 2005, we study the characteristics and seasonal variations of ripple structures. By analyzing the simultaneous background wind and temperature observed by the nearby sodium temperature/wind lidar at Fort Collins, Colorado (40.6°N, 105°W), and a nearby medium‐frequency radar at Platteville, Colorado (40.2°N, 105.8°W), we are able to statistically study the possible relation between ripples and the background atmosphere conditions. Characteristics and seasonal variations of ripples are presented in detail in this study. The occurrence frequency of ripples exhibits clear seasonal variability, with peak in autumn. The occurrence of ripples shows a local time dependence, which is most likely associated with the solar tides. The lifetime and spatial scale of these ripples are typically 5–20 min and 5–10 km, respectively, and most of the ripples move preferentially either southward or northward. However, more than half of the observed ripples do not advect with background flow; they have higher Richardson numbers than those ripples that advect with background flow. It is possible that they are not instability features but wave structures that are hard to be distinguished from the real instability features.

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OH airglow phenomena during the 5–6 July 1982 total lunar eclipse

Cited by 22 publications

References 5 publications

Short-period gravity waves and ripples in the South Pole mesosphere

Short-period gravity waves and ripples in the South Pole mesosphere

Instability layers and airglow imaging

Characteristics of ripple structures revealed in OH airglow images

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