...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Optical properties of the Martian aerosols as derived from Imager for Mars Pathfinder midday sky brightness data
【24h】

Optical properties of the Martian aerosols as derived from Imager for Mars Pathfinder midday sky brightness data

机译：从成像仪获得的火星探路者午间天空亮度数据的火星气溶胶光学特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Imager for Mars Pathfinder (IMP) obtained data on the midday sky brightness in filters centered at 443.6, 481.0, 670.8, 896.1 and 965.3 nm. Useful data sets were returned on sols 27, 40, 56, 65, 68, 74. and 82. Data from sol 56 were fitted with multiple scattering radiative transfer calculations, to extract the size distribution, optical properties and shape of the aerosols suspended in the atmosphere. The derived effective radius of the particles is about 1.71 + 0.29 / - 0.26 #mu#m with an effective variance of #upsilon#_(eff) = 0.25 + 0.05 / - 0.1. The estimated values of the refractive index and shape parameters are close to those derived from Viking and Phobos data. This in turn implies that dust plays a significant and relatively constant role in the energy budget of the Martian atmosphere over the last two decades. Estimates of the optical depth agree well with those obtained independently from direct IMP imaging of the Sun. The derived single scattering phase function is more compatible with plate (clay) like particles rather than equal dimensional particles. The presented analysis assumes a simple rather than equal dimensional particles. he presented analysis assumes a simple single-component dust atmosphere. The data-model residuals exhibit, albeit weak, wavelength dependence. This dependence can be interpreted as an indication that during the time the analyzed images were taken, the dust particle distribution was bimodal or that the Martian atmosphere contained a second component, possibly submicron ice particles, in the aerosol's population.
机译：火星探路者（IMP）成像仪获得的午夜天空亮度数据位于以443.6、481.0、670.8、896.1和965.3 nm为中心的滤镜中。有用的数据集返回到溶胶27、40、56、65、68、74和82。溶胶56的数据经过多次散射辐射转移计算，以提取悬浮在其中的气溶胶的尺寸分布，光学特性和形状。气氛。粒子的有效半径约为1.71 + 0.29 /-0.26＃mu＃m，有效方差为#upsilon #_（eff）= 0.25 + 0.05 /-0.1。折射率和形状参数的估计值接近于从Viking和Phobos数据得出的估计值。反过来，这意味着在过去的二十年中，尘埃在火星大气层的能量预算中起着重要且相对恒定的作用。光学深度的估计与独立于太阳的直接IMP成像获得的估计非常吻合。导出的单散射相函数与板（粘土）状颗粒（而不是等维颗粒）更兼容。提出的分析假设一个简单而不是相等尺寸的粒子。他提出的分析假设简单的单组分粉尘气氛。数据模型残差显示出对波长的依赖性，尽管很弱。这种依赖性可以解释为在拍摄分析图像期间，尘埃颗粒分布是双峰的，或者火星大气中的气溶胶种群中包含第二种成分，可能是亚微米级的冰粒，这可以作为一种指示。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号