哈葛尔沙丘场

形成

虽然通常可从沙丘的走向和形状获得有关风向的信息，但由于哈葛尔沙丘形状复杂，所以很难确定所形成的风向。在该沙丘场情况中，理论上认为可能是陨石撞击在地面形成装满沙子的局部陨坑，减少了形成沙丘的沙子数量；反过来这又会影响当地的地形，导致风向发生变化^[1]^[4]。

美国宇航局关于火星摩尔斯电码的视频剪辑。

线形沙丘（横杠）是通过垂直于沙丘线的双向风产生出漏斗效应，引导沙子沿沙丘线性轴堆积而成；而当导致线性堆积的风被阻断时，则就形成了圆形沙丘（圆点），圆形沙丘被归类为“新月形沙丘”。然而，这两种结构的确切形成机制仍不清楚，这也是高分辨率成像科学设备任务选择该区域进行成像的原因^[4]。

高分辨率成像科学设备相机定位专家维罗妮卡·布雷（Veronica Bray）评论说，火星上的其他地方也有类似形状的沙丘，但由于其地形的罕见特征，哈葛尔沙丘场提供了更好的图像。布雷还将沙丘的分布结构“莫尔斯码”解码为“NEE NED ZB 6TNN DEIBEDH SIEFI EBEEE SSIEI ESEE SEEE!!”^[7]^[8]。

参考文献

[1]
Jeffrey Kluger. Here's What Explains the 'Morse Code' on Mars. Time magazine. 12 July 2016 [2022-04-05]. （原始内容存档于2021-11-26）.
[2]
C.J. Hansen; S. Byrne; G. Portyankina; M. Bourke; C. Dundas; A. McEwen; M. Mellon; A. Pommerol; N. Thomas. Observations of the northern seasonal polar cap on Mars: I. Spring sublimation activity and processes (PDF). Icarus. 2013, (225): 881–897 [19 July 2017]. （原始内容存档 (PDF)于2022-02-01）. Please see note at Table 1 page 883: Table 1 Sites imaged systematically by HiRISE in study year 3 (MY31) of seasonal campaign. The names are informal, some based on the sand dunes in the science fiction book Dune.
[3]
Colin M. Dundas; Shane Byrne; Alfred S. McEwen; Michael T. Mellon; Megan R. Kennedy; Ingrid J. Daubar; Lee Saper. HiRISE observations of new impact craters exposing Martian ground ice. Journal of Geophysical Research. 27 January 2014, 119 (1): 109. Bibcode:2014JGRE..119..109D. doi:10.1002/2013JE004482. Six sites were discovered in the northern summer of Mars Year 29 (MY29), seven in MY30, and seven in MY31. (MY refers to the Mars calendar of Clancy et al. [2000], and this notation will be used throughout this paper; years begin at LS = 0°, the beginning of northern spring. MY32 began on 31 July 2013.)
[4]
Martian Morse Code. NASA. 8 July 2016 [2022-04-05]. （原始内容存档于2022-03-31）.
[5]
Martian Morse Code ESP_045334_2580. HiRISE. 29 June 2016 [2022-04-05]. （原始内容存档于2021-10-22）.
[6]
Jessica F. Morse Code in Sand Dunes Found on Mars?. Nature World News. 12 July 2016 [2022-04-05]. （原始内容存档于2020-01-06）. NASA calls the formation the "Martian Morse Code,"
[7]
Maddie Stone. There's a Secret Message Written Into the Sands of Mars. Gizmodo. 8 July 2016 [2022-04-05]. （原始内容存档于2022-04-09）.
[8]
Doug Criss. Message from Mars? Morse code dunes found on red planet. CNN. 13 July 2016 [2022-04-05]. （原始内容存档于2022-04-05）.

外部链接

形成

美国宇航局关于火星摩尔斯电码的视频剪辑。

参考文献

[1]
Jeffrey Kluger. Here's What Explains the 'Morse Code' on Mars. Time magazine. 12 July 2016 [2022-04-05]. （原始内容存档于2021-11-26）.
[2]
C.J. Hansen; S. Byrne; G. Portyankina; M. Bourke; C. Dundas; A. McEwen; M. Mellon; A. Pommerol; N. Thomas. Observations of the northern seasonal polar cap on Mars: I. Spring sublimation activity and processes (PDF). Icarus. 2013, (225): 881–897 [19 July 2017]. （原始内容存档 (PDF)于2022-02-01）. Please see note at Table 1 page 883: Table 1 Sites imaged systematically by HiRISE in study year 3 (MY31) of seasonal campaign. The names are informal, some based on the sand dunes in the science fiction book Dune.
[3]
Colin M. Dundas; Shane Byrne; Alfred S. McEwen; Michael T. Mellon; Megan R. Kennedy; Ingrid J. Daubar; Lee Saper. HiRISE observations of new impact craters exposing Martian ground ice. Journal of Geophysical Research. 27 January 2014, 119 (1): 109. Bibcode:2014JGRE..119..109D. doi:10.1002/2013JE004482. Six sites were discovered in the northern summer of Mars Year 29 (MY29), seven in MY30, and seven in MY31. (MY refers to the Mars calendar of Clancy et al. [2000], and this notation will be used throughout this paper; years begin at LS = 0°, the beginning of northern spring. MY32 began on 31 July 2013.)
[4]
Martian Morse Code. NASA. 8 July 2016 [2022-04-05]. （原始内容存档于2022-03-31）.
[5]
Martian Morse Code ESP_045334_2580. HiRISE. 29 June 2016 [2022-04-05]. （原始内容存档于2021-10-22）.
[6]
Jessica F. Morse Code in Sand Dunes Found on Mars?. Nature World News. 12 July 2016 [2022-04-05]. （原始内容存档于2020-01-06）. NASA calls the formation the "Martian Morse Code,"
[7]
Maddie Stone. There's a Secret Message Written Into the Sands of Mars. Gizmodo. 8 July 2016 [2022-04-05]. （原始内容存档于2022-04-09）.
[8]
Doug Criss. Message from Mars? Morse code dunes found on red planet. CNN. 13 July 2016 [2022-04-05]. （原始内容存档于2022-04-05）.

外部链接

形成

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参考文献

外部链接

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哈葛尔沙丘场

形成

另请查看

参考文献

外部链接

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