Persistent Link:
http://hdl.handle.net/10150/186462
Title:
Energy balance and solar heating in Neptune's upper atmosphere.
Author:
Wang, Yiping.
Issue Date:
1993
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
We have constructed the thermal structure of Neptune's stratosphere and low thermosphere with pressures between 10⁻³ μbar and 100 mbar using a radiative-conductive model which includes solar UV and EUV heating, non-LTE cooling by hydrocarbon fundamental bands, cooling by H₂ collisional induced opacities, and heating by the CH₄ near and far infrared bands. We have thoroughly investigated the availabilities of different techniques in modeling the CH₄ near-IR bands (3.3, 2.3, and 1.7 μm) and calculating the heating rates of these bands for pressures between 10⁻³ μbar and 100 mbar and temperatures between 50 K to 300 K. We have established an accurate and efficient way which is a combined method of correlated-k model and the Baines et al. (1993) empirical model to calculate these heating rates. The same method can also be applied to any other atmosphere of a Jovian planet. Through comparing the calculated temperature profiles and the measured one of Neptune's upper atmosphere, we have set constraints on the magnitudes, locations and the regions those are extended by for the stratospheric aerosol heating, heating by the source located in the mesosphere and heating by the conducted flux from the thermosphere. We also found that by using a constant CH₄ mixing ratio in the stratosphere of Neptune, 1.3 x 10⁻³, obtained by Yelle et al. (1993) through analyzing Voyager solar occultation data, the measured stratospheric temperatures between 20 to 100 mbar can be best matched by the calculational results.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Dissertations, Academic.; Astrophysics.; Atmospheric physics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Planetary Sciences; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Yelle, Roger V.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleEnergy balance and solar heating in Neptune's upper atmosphere.en_US
dc.creatorWang, Yiping.en_US
dc.contributor.authorWang, Yiping.en_US
dc.date.issued1993en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractWe have constructed the thermal structure of Neptune's stratosphere and low thermosphere with pressures between 10⁻³ μbar and 100 mbar using a radiative-conductive model which includes solar UV and EUV heating, non-LTE cooling by hydrocarbon fundamental bands, cooling by H₂ collisional induced opacities, and heating by the CH₄ near and far infrared bands. We have thoroughly investigated the availabilities of different techniques in modeling the CH₄ near-IR bands (3.3, 2.3, and 1.7 μm) and calculating the heating rates of these bands for pressures between 10⁻³ μbar and 100 mbar and temperatures between 50 K to 300 K. We have established an accurate and efficient way which is a combined method of correlated-k model and the Baines et al. (1993) empirical model to calculate these heating rates. The same method can also be applied to any other atmosphere of a Jovian planet. Through comparing the calculated temperature profiles and the measured one of Neptune's upper atmosphere, we have set constraints on the magnitudes, locations and the regions those are extended by for the stratospheric aerosol heating, heating by the source located in the mesosphere and heating by the conducted flux from the thermosphere. We also found that by using a constant CH₄ mixing ratio in the stratosphere of Neptune, 1.3 x 10⁻³, obtained by Yelle et al. (1993) through analyzing Voyager solar occultation data, the measured stratospheric temperatures between 20 to 100 mbar can be best matched by the calculational results.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectDissertations, Academic.en_US
dc.subjectAstrophysics.en_US
dc.subjectAtmospheric physics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplinePlanetary Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairYelle, Roger V.en_US
dc.contributor.committeememberHunten, Donald M.en_US
dc.contributor.committeememberLunine, Jonathan I.en_US
dc.contributor.committeememberGarcia, J. D.en_US
dc.contributor.committeememberSandel, Bill R.en_US
dc.identifier.proquest9410663en_US
dc.identifier.oclc721329889en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.