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DOI | 10.1038/NGEO3016 |
Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki | |
Horinouchi, Takeshi1,2; Murakami, Shin-ya2; Satoh, Takehiko2,3; Peralta, Javier2; Ogohara, Kazunori4; Kouyama, Toru5; Imamura, Takeshi6; Kashimura, Hiroki7; Limaye, Sanjay S.8; McGouldrick, Kevin9; Nakamura, Masato2; Sato, Takao M.2; Sugiyama, Ko-ichiro10; Takagi, Masahiro11; Watanabe, Shigeto12; Yamada, Manabu13; Yamazaki, Atsushi2; Young, Eliot F.14 | |
2017-09-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA |
英文摘要 | The Venusian atmosphere is in a state of superrotation where prevailing westward winds move much faster than the planet's rotation. Venus is covered with thick clouds that extend from about 45 to 70 km altitude, but thermal radiation emitted from the lower atmosphere and the surface on the planet's nightside escapes to space at narrow spectral windows of the near-infrared. The radiation can be used to estimate winds by tracking the silhouettes of clouds in the lower and middle cloud regions below about 57 km in altitude. Estimates of wind speeds have ranged from 50 to 70ms 1 at low to mid-latitudes, either nearly constant across latitudes or with winds peaking at mid-latitudes. Here we report the detection of winds at low latitude exceeding 80 m s(-1) using IR2 camera images from the Akatsuki orbiter taken during July and August 2016. The angular speed around the planetary rotation axis peaks near the equator, which we suggest is consistent with an equatorial jet, a feature that has not been observed previously in the Venusian atmosphere. The mechanism producing the jet remains unclear. Our observations reveal variability in the zonal flow in the lower and middle cloud region that may provide clues to the dynamics of Venus's atmospheric superrotation. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409229600009 |
WOS关键词 | ATMOSPHERE ; CIRCULATION ; WINDS ; ORBITER ; MODEL ; SIDE ; SUPERROTATION ; TEMPERATURE ; MAINTENANCE ; WAVE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34947 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Hokkaido Univ, Fac Environm Earth Sci, N10W5, Sapporo, Hokkaido 0600810, Japan; 2.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2525210, Japan; 3.SOKENDAI, Sch Phys Sci, Dept Space & Astronaut Sci, Hayama 2400193, Japan; 4.Univ Shiga Prefecture, Sch Engn, Hikone 5228533, Japan; 5.Natl Inst Adv Ind Sci & Technol, Artificial Intelligence Res Ctr, Tokyo 1350064, Japan; 6.Univ Tokyo, Grad Sch Frontier Sci, Kashiwa, Chiba 2778561, Japan; 7.Kobe Univ, Dept Planetol, Ctr Planetary Sci, Kobe, Hyogo 6500047, Japan; 8.Univ Wisconsin, Ctr Space Sci & Engn, 1225 W Dayton St, Madison, WI 53706 USA; 9.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80303 USA; 10.Matsue Coll, Natl Inst Technol, Matsue, Shimane 6900865, Japan; 11.Kyoto Sangyo Univ, Div Sci, Kyoto 6038555, Japan; 12.Hokkaido Informat Univ, Space Informat Ctr, Ebetsu, Hokkaido 0698585, Japan; 13.Chiba Inst Technol, Planetary Explorat Res Ctr, Narashino, Chiba 2750016, Japan; 14.Southwest Res Inst, San Antonio, TX 78238 USA |
推荐引用方式 GB/T 7714 | Horinouchi, Takeshi,Murakami, Shin-ya,Satoh, Takehiko,et al. Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki[J]. NATURE GEOSCIENCE,2017,10(9). |
APA | Horinouchi, Takeshi.,Murakami, Shin-ya.,Satoh, Takehiko.,Peralta, Javier.,Ogohara, Kazunori.,...&Young, Eliot F..(2017).Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki.NATURE GEOSCIENCE,10(9). |
MLA | Horinouchi, Takeshi,et al."Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki".NATURE GEOSCIENCE 10.9(2017). |
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