کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5487050 | 1523506 | 2017 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
D/H fractionation during the sublimation of water ice
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: D/H fractionation during the sublimation of water ice D/H fractionation during the sublimation of water ice](/preview/png/5487050.png)
چکیده انگلیسی
Experiments of sublimation of pure water ice have been performed in the temperature range â105°C to â30°C and atmospheric partial pressures ranging from 10â6 to 10â1 mb. Sampling of both vapour and residual ice fractions has been performed with the use of a vacuum line designed for the extraction and purification of gases before the measurement of their D/H ratios. Sublimation was responsible for sizable isotopic fractionation factors in the range 0.969-1.123 for temperatures lying between â105°C and â30°C. The fractionation factor exhibits a cross-over at temperatures around â50°C with the water vapour fraction being D-depleted relative to the residual ice fraction at T < â50°C (αice-vapour = â0.969-0.995). This cross-over has implications for the understanding of the atmospheric water cycle of some terrestrial planets such as the Earth or Mars. The magnitude of deuterium enrichment or depletion between ice and water vapour cannot explain the differences in the D/H ratios amongst Jupiter comets and long-period comets families nor those that have been documented between Earth's and cometary water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 285, 15 March 2017, Pages 1-7
Journal: Icarus - Volume 285, 15 March 2017, Pages 1-7
نویسندگان
Christophe Lécuyer, Aurélien Royer, François Fourel, Magali Seris, Laurent Simon, François Robert,