...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the Atmospheric Sciences >Characterization of the Martian Surface Layer
【24h】

Characterization of the Martian Surface Layer

机译：火星表面层的表征

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 authors have estimated the diurnal evolution of Monin-Obukhov length, friction velocity, temperature scale, surface heat flux, eddy-transfer coefficients for momentum and heat, and turbulent viscous dissipation rate on the Martian surface layer for a complete sol belonging to the Pathfinder mission. All these magnitudes have been derived from in situ wind and temperature measurements at around 1.3-m height and simulated ground temperature (from 0600 sol 25 to 0600 sol 26). Previously, neither values of turbulent viscous dissipation rate and eddy-transfer coefficients from in situ measurements for the Martian surface layer nor diurnal evolutions of all the previously mentioned turbulent parameters for the Pathfinder had been obtained. Monin-Obukhov similarity theory for stratified surface layers has been applied to obtain the results. The values assigned to the surface roughness and the applied parameterization of the interfacial sublayer will be discussed in detail with respect to the results' sensitivity to them. The authors have found similarities concerning the order of magnitude and qualitative behavior of Monin-Obukhov length, friction velocity, and turbulent viscous dissipation rate on Earth and on Mars. However, quantities directly related to the lower Martian atmospheric density and thermal inertia, like temperature scale and hence surface heat flux, range over different orders of magnitude. Additionally, turbulent exchanges in the first few meters have been found to be just two orders of magnitude higher than the molecular ones, whereas on Earth around five orders of magnitude separate both mechanisms.
机译：作者已估算出属于探路者的完整溶胶的Monin-Obukhov长度，摩擦速度，温度范围，表面热通量，动量和热的涡流传递系数以及火星表面层上湍流粘性耗散率的日变化。任务。所有这些量值均来自于1.3米高处的原位风和温度测量值以及模拟的地面温度（从0600 sol 25到0600 sol 26）。以前，既未获得火星表面层原位测量的湍流粘性耗散率和涡流系数的值，也未获得探路者先前提到的所有湍流参数的日变化。分层表面层的莫宁-奥布霍夫相似性理论已被应用来获得结果。将针对结果对它们的敏感性详细讨论分配给表面粗糙度和界面子层的应用参数化的值。作者已经发现了关于地球和火星上莫宁-奥布霍夫长度，摩擦速度和湍流粘性耗散率的数量级和定性行为的相似性。但是，与较低的火星大气密度和热惯性直接相关的量（例如温度标度和地表热通量）的变化幅度不同。另外，已经发现前几米的湍流交换仅比分子交换高两个数量级，而在地球上大约五个数量级将两种机制分开。

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