Jupiter’s Red Oval BA: Dynamics, Color, and Relationship to Jovian Climate Change
Jupiter’s Red Oval BA: Dynamics, Color, and Relationship to Jovian Climate Change
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木星的红色椭圆形 BA：动态、颜色以及与木星气候变化的关系
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
I. Pater
中科院分区：
文献类型：
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作者：
P. Marcus;X. Asay;M. Wong;I. Pater
木星现在有了第二个红斑，椭圆形BA。第一个红斑，大红斑(GRS)，至少有180年的历史。2000年成立的椭圆形BA最初是白色的，但部分在2005年变成了红色。与大红斑不同，椭圆形BA的红色仅限于环形。2000年至2006年间，椭圆形的水平速度、形状以及上方雾霾层的高度都没有变化。这些观测，再加上木星的快速自转和层化，表明椭圆形BA的3D特性，如垂直厚度，也没有变化。因此，无论是大小还是速度的改变都不会导致椭圆形BA变得部分红色。大气变暖既可以解释椭圆形BA颜色变化的时间，也可以解释其红色持续限制在环状区域的原因。
Jupiter now has a second red spot, the Oval BA. The first red spot, the Great Red Spot (GRS), is at least 180 yr old. The Oval BA formed in 2000 was originally white, but part turned red in 2005. Unlike the Great Red Spot, the red color of the Oval BA is confined to an annulus. The Oval’s horizontal velocity and shape and the elevation of the haze layer above it were unchanged between 2000 and 2006. These observations, coupled with Jupiter’s rapid rotation and stratification, are shown to imply that the Oval BA’s 3D properties, such as its vertical thickness, were also unchanged. Therefore, neither a change in size nor velocity caused the Oval BA to turn partially red. An atmospheric warming can account for both the timing of the color change of the Oval BA as well as the persistent confinement of its red color to an annulus.