Research output: Contribution to journal › Conference article › peer-review
Measurement of rate constant for quenching CO2(0110) by atomic oxygen at low temperatures : Reassessment of the population of CO 2(0110) and the CO215-μm emission cooling in the lower thermosphere. / Shved, Gustav M.; Khvorostovskaya, Lyudmila E.; Potekhin, Igor Yu; Ogibalov, Vladimir P.; Uzyukova, Tatyana V.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4882, 01.12.2002, p. 106-116.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Measurement of rate constant for quenching CO2(0110) by atomic oxygen at low temperatures
T2 - Remote Sensing of Clouds and the Atmosphere VII
AU - Shved, Gustav M.
AU - Khvorostovskaya, Lyudmila E.
AU - Potekhin, Igor Yu
AU - Ogibalov, Vladimir P.
AU - Uzyukova, Tatyana V.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - The paper presents the first laboratory measurement of the rate constant for quenching the CO2(0110) state during collisions of CO2 molecules with O atoms at temperatures realized near the Earth's mesopause. The measurement was carried out with a hollow-cathode glow discharge in the temperature range 206-358 K. The measured values are significantly smaller than those commonly used in solving the non-LTE CO2 problem for the vibrational states of the mode v2 in the atmospheres of the Earth, Venus, and Mars. The measured temperature dependence of the rate constant is approximated by a simple relation, which is recommended for solving the above problem. The value of this rate constant is absolutely critical to remotely sense temperature, and hence also constituent densities, in the upper mesosphere and lower thermosphere of the Earth. The use of the new values of the rate constant significantly decreased the rate of cooling by the CO 2 15-μm emission in the terrestrial lower thermosphere as compared to the previous estimates obtained for this rate. Over the most area of the Earth's surface, the maximum cooling rate occurs at an altitude of about 110 km and amounts to about 20 K/day.
AB - The paper presents the first laboratory measurement of the rate constant for quenching the CO2(0110) state during collisions of CO2 molecules with O atoms at temperatures realized near the Earth's mesopause. The measurement was carried out with a hollow-cathode glow discharge in the temperature range 206-358 K. The measured values are significantly smaller than those commonly used in solving the non-LTE CO2 problem for the vibrational states of the mode v2 in the atmospheres of the Earth, Venus, and Mars. The measured temperature dependence of the rate constant is approximated by a simple relation, which is recommended for solving the above problem. The value of this rate constant is absolutely critical to remotely sense temperature, and hence also constituent densities, in the upper mesosphere and lower thermosphere of the Earth. The use of the new values of the rate constant significantly decreased the rate of cooling by the CO 2 15-μm emission in the terrestrial lower thermosphere as compared to the previous estimates obtained for this rate. Over the most area of the Earth's surface, the maximum cooling rate occurs at an altitude of about 110 km and amounts to about 20 K/day.
KW - Atmospheric infrared emission
KW - Hollow-cathode glow discharge
KW - Non-LTE
KW - V-T collisional transfer
UR - http://www.scopus.com/inward/record.url?scp=0041730196&partnerID=8YFLogxK
U2 - 10.1117/12.463371
DO - 10.1117/12.463371
M3 - Conference article
AN - SCOPUS:0041730196
VL - 4882
SP - 106
EP - 116
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
SN - 0277-786X
Y2 - 24 September 2002 through 27 September 2002
ER -
ID: 39862527