The Deuterium Isotopic Ratio of Water Released From the Martian Caps as Measured With TGO/NOMAD

The Deuterium Isotopic Ratio of Water Released From the Martian Caps as Measured With TGO/NOMAD
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用 TGO/NOMAD 测量从火星盖释放的水的氘同位素比

DOI:
10.1029/2022gl098161
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发表时间:
2022
影响因子:
5.2
通讯作者:
et al.
et al.
中科院分区:
地球科学1区
文献类型:
--
作者:
Geronimo L. Villanueva;Giuliano Liuzzi;Shohei Aoki; et al.

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我们报告垂直剖面的水和D/H的一个火星年测量的TGO/NOMAD仪器。观测是通过太阳掩星进行的,提供了最高达100公里的水剖面图和最高达160公里的D/H,垂直分辨率为1-2公里。这些测量结果揭示了水和D/H在短时间内以及随着地球上的高度和位置而发生的巨大变化。我们调查了季节性水的释放从极冠在南部和北方夏季,通过绘制水和它的D/H附近的极地地区。在湿层顶以上,D/H大大低于2 VSMOW,两个季节性极冠在湿层内显示出5-7 VSMOW的一致和丰富的D/H。
We report vertical profiles of water and D/H for one Martian year as measured with the TGO/NOMAD instrument. The observations were performed via solar occultation, providing water profiles up to ∼100 km and D/H up to ∼60 km, with a vertical resolution of 1–2 km. The measurements reveal dramatic variability of water and D/H over short timescales and with altitude and location on the planet. We investigated the release of seasonal water from the polar caps during southern and northern summer, by mapping water and its D/H near the polar regions. Above the hygropause, the D/H drops substantially below 2 VSMOW, and both seasonal polar caps show a consistent and enriched D/H of 5–7 VSMOW within the hygrosphere.
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