Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy
Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy
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通过地面 2.3μm 光谱分析金星云层上方 HDO 丰度的纬度分布
DOI：
10.1016/j.icarus.2011.07.026
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发表时间：
2012
期刊：
影响因子：
3.2
通讯作者：
G.L.Hashimoto
中科院分区：
文献类型：
--
作者：
H.Matsui;N.Iwagami;M.Hosouchi;S.Ohtsuki;G.L.Hashimoto
用地基2.3μm光谱仪连续4天测量了金星向阳面大气中HDO的丰度。这是第一次HDO观测云在这个波长区域对应一个新的高度区域。发现的纬度分布没有明确的结构。在62- 67 km的代表高度区，圆盘平均混合比为0.22±0.03ppm。这与先前研究中发现的测量结果一致。根据先前的H2O测量，发现HDO/H2O比大地比大140±20倍。这一比值介于120±40和240±25之间，分别是地面夜面光谱仪在30- 40公里区域和金星快车上的掩星测量在80- 100公里区域的比值。
The abundance of HDO above the clouds in the dayside atmosphere of Venus was measured by ground-based 2.3μm spectroscopy over 4 days. This is the first HDO observation above the clouds in this wavelength region corresponding to a new height region. The latitudinal distributions found show no clearly defined structure. The disk-averaged mixing ratio is 0.22±0.03ppm for a representative height region of 62–67km. This is consistent with measurements found in previous studies. Based on previous H2O measurements, the HDO/H2O ratio is found to be 140±20 times larger than the telluric ratio. This lies between the ratios of 120±40 and 240±25, respectively, reported for the 30–40km region by ground-based nightside spectroscopy and for the 80–100km region by solar occultation measurement on board the Venus Express.