کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5487099 | 1523505 | 2017 | 57 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Discovery of a 150 day period in the Venus condensational clouds
ترجمه فارسی عنوان
کشف یک دوره 150 روزه در ابرهای غلیظ زهره
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کلمات کلیدی
سیاره زهره، اتمسفر، ابرها، هواشناسی، دینامیک،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
چکیده انگلیسی
We have analyzed the long-term regional and global variation of emitted radiance in 1.74 µâm and 2.30 µâm near infrared spectral windows in the Venus atmosphere using the medium resolution, infrared channel of the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS-M-IR) on the Venus Express spacecraft. We find a periodic variation in the 1.74 µâm radiance that is most pronounced at mid-latitudes (30ââ60â latitude). This oscillation has a period of approximately 150 days, and is shown to be unlikely to be driven by variations in viewing geometry, nor by variations in instrumental characteristics such as spectrometer temperature. The oscillation has an amplitude at least as large as that of the typical day-to-day variations observed. The decay and recovery timescales are consistent with response of the cloud vertical structure to the radiative-dynamical feedback. It remains unclear why this variation would be seen only at mid-latitudes, but some hypotheses to guide future modeling testing are suggested.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 286, April 2017, Pages 118-133
Journal: Icarus - Volume 286, April 2017, Pages 118-133
نویسندگان
Kevin McGouldrick, Constantine C.C. Tsang,