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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
第74号 >
金星雲高度および風速の同時推定
| Title: | 金星雲高度および風速の同時推定 |
| Other Titles: | Simultaneous Estimation of Cloud Height and Wind Velocity of Venus |
| Authors: | 武, 直樹1 Browse this author | | 渡部, 重十2 Browse this author |
| Authors(alt): | Take, Naoki1 | | Watanabe, Shigeto2 |
| Issue Date: | 19-Mar-2011 |
| Publisher: | 北海道大学大学院理学研究院自然史科学部門（地球物理学） |
| Journal Title: | 北海道大学地球物理学研究報告 |
| Journal Title(alt): | Geophysical bulletin of Hokkaido University |
| Volume: | 74 |
| Start Page: | 57 |
| End Page: | 66 |
| Abstract: | Venus has numerous cloud features caused by unknown UV absorber in ultraviolet light. Horizontal wind velocities have been derived by tracking those features in order to examine the atmospheric circulation such as superrotation. However, the generation mechanism is not well understood yet, because the altitude of the winds is ambiguous. Ignatiev et al. (2009) performed radiative transfer calculations and showed that the cloud top altitudes in 1.51μm wavelength are 74±1km in low and middle latitudes and 63-67km in polar region, respectively. They investigated also the correlation between the cloud top altitude in UV wavelength and that in infrared, and found that those cloud top altitudes are almost same in low and middle latitudes under the assumption of constant scale height of the cloud. In this paper, we propose a fully geometrical method using 3 images to derive cloud height and wind velocities simultaneously. The cloud height and wind velocities estimated by this method are similar to other results. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/45152 |
| Appears in Collections: | 北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第74号
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