An Investigation of the Ionospheric <i>D</i> Region at Sunrise: 2, Estimation of Some Photodetachment Rates

Turco, R. P.; Sechrist, C. F.

doi:10.1029/rs007i007p00717

Cited by 28 publications

(14 citation statements)

References 11 publications

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“…It follows from Turco and Sechrist (1972) , and v B 92°for NO 3 -. It was shown by Turco and Sechrist (1972) that a difference between the photodetachment rate coefficients of NO 3 -calculated at 50 km altitude with and without taking into account absorption of solar radiation by neutral species of the atmosphere is not negligible even if the solar zenith angle is close to 76°.…”

Section: Influence Of Atmospheric Solar Radiation Absorption On Photomentioning

confidence: 92%

“…It should be noted that changes in the photodetachment rate coefficients of O -, O 2 -, NO 2 -, and NO 3 -ions (see reactions 1, 3, 6, and 7 of Table 1) caused by solar radiation atmospheric absorption were studied by Turco and Sechrist (1972) in the altitude range between 50 and 90 km of the atmosphere. It follows from Turco and Sechrist (1972) , and v B 92°for NO 3 -.…”

Section: Influence Of Atmospheric Solar Radiation Absorption On Photomentioning

confidence: 99%

“…It follows from Turco and Sechrist (1972) that these changes depend on the solar zenith angle, v, an altitude of the atmosphere, and kind of ions under consideration. The objective of this work is to study effects of atmospheric solar radiation absorption on the photodestruction rate coefficients…”

Section: Introductionmentioning

confidence: 98%

“…Changes in the photodetachment rate coefficients of O -, O 2 -, NO 2 -, and NO 3 -ions caused by solar radiation atmospheric absorption were studied by Turco and Sechrist (1972) at D-region altitudes of the ionosphere ignoring atmospheric scattering of solar radiation. It follows from Turco and Sechrist (1972) that these changes depend on the solar zenith angle, v, an altitude of the atmosphere, and kind of ions under consideration.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Atmospheric Solar Radiation Absorption on Photodestruction of Ions at D-Region Altitudes of the Ionosphere

Павлов

2016

Surv Geophys

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The influence of atmospheric solar radiation absorption on the photodetachment, dissociative photodetachment, and photodissociation rate coefficients (photode-, and NO ? (CO 2 ) at D-region altitudes of the ionosphere is studied. A numerical one-dimensional time-dependent neutral atmospheric composition model has been developed to estimate this influence. The model simulations are carried out for the geomagnetically quiet time period of 15 October 1998 at moderate solar activity over the Boulder ozonesonde. If the solar zenith angle is not more than 90°then the strongest influence of atmospheric solar radiation absorption on photodestruction of ions is found for photodissociation of CO 4 -ions when CO 3 -ions are formed. It follows from the calculations that decreases in the photodestruction rate coefficients of ions under consideration caused by this influence are less than 2 % at 70 km altitude and above this altitude if the solar zenith angle does not exceed 90°.

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Section: Influence Of Atmospheric Solar Radiation Absorption On Photomentioning

confidence: 92%

Section: Influence Of Atmospheric Solar Radiation Absorption On Photomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Atmospheric Solar Radiation Absorption on Photodestruction of Ions at D-Region Altitudes of the Ionosphere

Павлов

2016

Surv Geophys

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“…tf(x) is a function of solar zenith angle, taken from Turco and Sechrist (1972). Torkar and Friedrich (1983) (Fig.…”

Section: The Methodsmentioning

confidence: 99%

Quantitative Studies of Energetic Particle Precipitation Using Incoherent Scatter Radar.

Kirkwood

Osepian

1995

J. geomagn. geoelec

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The most direct effect of energetic particle precipitation in the upper atmosphere is electron density enhancement. Measurements of the altitude profile of electron density and its time variations can in many circumstances be used for quantitative studies of the parameters of the energetic particle flux. The inversion techniques which have been previously developed to relate typical animal particle fluxes to measurements of electron density in the E-region, and some of the results obtained, are briefly reviewed. Newly developed techniques which allow the inversion procedure to be extended to D-region electron densities and to correspondingly more energetic particles are described. Some tests of these techniques are presented and their application to substorm aurora, pulsating aurora and a polar cap absorption event are illustrated.

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Global modeling of the low‐ and middle‐latitude ionospheric D and lower E regions and implications for HF radio wave absorption

et al. 2017

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We compare D and lower E region ionospheric model calculations driven by the Whole Atmosphere Community Climate Model (WACCM) with a selection of electron density profiles made by sounding rockets over the past 50 years. The WACCM model, in turn, is nudged by winds and temperatures from the Navy Operational Global Atmospheric Prediction System‐Advanced Level Physics High Altitude (NOGAPS‐ALPHA). This nudging has been shown to greatly improve the representation of key neutral constituents, such as nitric oxide (NO), that are used as inputs to the ionospheric model. We show that with this improved representation, we greatly improve the comparison between calculated and observed electron densities relative to older studies. At midlatitudes, for both winter and equinoctal conditions, the model agrees well with the data. At tropical latitudes, our results confirm a previous suggestion that there is a model deficit in the calculated electron density in the lowermost D region. We then apply the calculated electron densities to examine the variation of HF absorption with altitude, latitude, and season and from 2008 to 2009. For low latitudes, our results agree with recent studies showing a primary peak absorption in the lower E region with a secondary peak below 75 km. For midlatitude to high latitude, the absorption contains a significant contribution from the middle D region where ionization of NO drives the ion chemistry. The difference in middle‐ to high‐latitude absorption from 2008 to 2009 is due to changes in the NO abundance near 80 km from changes in the wintertime mesospheric residual circulation.

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An Investigation of the Ionospheric D Region at Sunrise: 2, Estimation of Some Photodetachment Rates

Cited by 28 publications

References 11 publications

Influence of Atmospheric Solar Radiation Absorption on Photodestruction of Ions at D-Region Altitudes of the Ionosphere

Influence of Atmospheric Solar Radiation Absorption on Photodestruction of Ions at D-Region Altitudes of the Ionosphere

Quantitative Studies of Energetic Particle Precipitation Using Incoherent Scatter Radar.

Global modeling of the low‐ and middle‐latitude ionospheric D and lower E regions and implications for HF radio wave absorption

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