Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093623 |
In-situ Measurements of Electron Temperature and Density in Mars’ Dayside Ionosphere | |
R. E. Ergun; L. A. Andersson; C. M. Fowler; S. A. Thaller; R. V. Yelle | |
2021-06-22 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | We present dayside electron temperature (Te) and density altitude profiles at Mars from MAVEN satellite deep-dip orbits. The data are after recalibration of the Langmuir Probe and Waves instrument that results in reduced uncertainties to as low as +82 oK. At MAVEN's lowest altitudes, (∼120 to ∼135 km), the measured values of Te are, after uncertainties, higher than those predicted by several modeling efforts. To better understand this discrepancy, we perform a basic heat-transfer analysis for two specific dayside deep dips. The analysis supports that CO2 excitation/deexcitation of its lowest-energy vibrational states dominates energy transfer to and from electrons. We hypothesize that the discrepancy between the measured and modeled Te is due to (1) the coupling of Te to CO2 vibrational temperatures combined with a non-LTE (local thermal equilibrium) excess of excited CO2 and/or (2) a non-Maxwellian electron distribution that moderates CO2 cooling. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333755 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | R. E. Ergun,L. A. Andersson,C. M. Fowler,等. In-situ Measurements of Electron Temperature and Density in Mars’ Dayside Ionosphere[J]. Geophysical Research Letters,2021. |
APA | R. E. Ergun,L. A. Andersson,C. M. Fowler,S. A. Thaller,&R. V. Yelle.(2021).In-situ Measurements of Electron Temperature and Density in Mars’ Dayside Ionosphere.Geophysical Research Letters. |
MLA | R. E. Ergun,et al."In-situ Measurements of Electron Temperature and Density in Mars’ Dayside Ionosphere".Geophysical Research Letters (2021). |
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