Spatial distributions and seasonal variations of features related to a venting process at high southern latitudes observed by the MOC camera

NCU Institutional Repository > 理學院 > 天文研究所 > 期刊論文 > Item 987654321/27865

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27865

題名:	Spatial distributions and seasonal variations of features related to a venting process at high southern latitudes observed by the MOC camera
作者:	Jian,JJ;Ip,WH;Sheu,SR
貢獻者:	天文研究所
關鍵詞:	RESIDUAL CO2 FROST;POLAR-CAP;ICE CAP;MARS;SUBLIMATION;PERMAFROST;SURFACE
日期:	2009
上傳時間:	2010-06-29 19:35:06 (UTC+8)
出版者:	中央大學
摘要:	A distinctive terrain named cryptic region which is characterized by regions of low albedo and low temperature has been identified oil the Martian south polar cap. In this zone, many fan- and spider-shaped features of km-scale appeared following the sublimation of the CO2 frost layer. These peculiar features were apparently caused by a wind-blown system of dust-laden jets. During the warming period starting at L-s similar to 180, the seasonal ice cap regresses and fans and spiders appear in sequence. These surface features are repeatable events that tend to occupy the Same areas front year to year. In this Study, We use the Mars Orbiter camera (MOC) narrow-angle images to produce a statistical Study of the time distributions of the fans and spiders as functions of L, and as functions of the topography. The time variations and spatial distributions of these features are further correlated with the CO2 ice coverage measured by the Mars Orbiter laser altimeter (MOLA) instrument. We have documented that most of the falls are found in the early spring with L-s <230 and the fans and spiders coexist at L-s = 250 +/- 20. It is also found that there is a strong dependence oil latitude and altitude with falls and spiders most often observed at high latitude (>83 S) and high altitude (>2500 m). Our statistical result also indicates that the occurrence of fans is highly correlated with the thickness of the CO2 frost thus providing support for the venting model. (C) 2009 Elsevier Ltd. All rights reserved.
關聯:	PLANETARY AND SPACE SCIENCE
顯示於類別:	[天文研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	733	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....