On the sodium D line emission in the terrestrial nightglow
On the sodium D line emission in the terrestrial nightglow
复制标题
陆地夜光中钠 D 线发射
DOI:
10.1016/j.jastp.2011.10.019
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发表时间:
2012
影响因子:
1.9
通讯作者:
Plane J
中科院分区:
文献类型:
--
作者:
Plane J
Emission from atomic Na, consisting of a doublet of lines at 589.0 and 589.6nm, is a prominent feature of the earth’s nightglow. A large data-base of measurements of the relative intensities of the D lines (RD) was gathered at three locations: the ALOMAR observatory, Andenes (Norway, 69°N), Kuujjuarapik (Canada, 55°N) and the Danum Valley (Borneo, 8°N). RDvaries between 1.5 and 2.0, with an average value of 1.67. These results were interpreted using a theoretical model of the Na nightglow which involves initial production of electronically excited NaO(A2Σ) from the reaction between Na and O3, followed either by reaction with O to generate Na(2PJ) with a branching ratio of 1/6 and a J=3/2 to 1/2 propensity of 2.0, or quenching of NaO(A) to NaO(X2Π) by O2. The resulting NaO(X) then reacts with O to generate Na(2PJ) with a branching ratio of 1/6 and a J=3/2 to 1/2 propensity of 1.5. These branching ratios and spin-orbit propensities are derived from statistical correlation of the electronic potential energy surfaces connecting the reactants NaO(A)+O and NaO(X)+O with the products Na+O2, through the Na+O2−ion-pair intermediate. A fit of this statistical model to the results of an earlier laboratory study (Slanger et al., 2005), where RDwas measured as a function of the ratio [O]/[O2], indicates that the rate coefficient for the quenching of NaO(A) by O2is around 1×10−11cm3molecule−1s−1. The statistical model is also in good accord with recent high resolution observations of the Na D line widths (Harrell et al., 2010). An atmospheric model is then used to show that gravity wave-driven perturbations to the Na layer can account for the observed variability of RD.
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DOI:
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发表时间:
1995
期刊:
影响因子:
--
作者:
B. Clemesha;D. Simonich;H. Takahashi;S. Melo;J. Plane
通讯作者:
J. Plane
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
R. M. Cox;J. Plane
通讯作者:
J. Plane
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
T. G. Wright;A. Ellis;J. Dyke
通讯作者:
J. Dyke
影响因子:
64.8
作者:
D. Herschbach;C. Kolb;D. Worsnop;X. Shi
通讯作者:
X. Shi
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
J. A. Silver;C. Kolb
通讯作者:
C. Kolb