New Global Meteoric Smoke Observations From SOFIE: Insight Regarding Chemical Composition, Meteoric Influx, and Hemispheric Asymmetry
New Global Meteoric Smoke Observations From SOFIE: Insight Regarding Chemical Composition, Meteoric Influx, and Hemispheric Asymmetry
复制标题
SOFIE 新的全球流星烟雾观测：关于化学成分、流星流入和半球不对称性的见解
DOI：
10.1029/2021jd035007
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
S. Bailey
中科院分区：
文献类型：
--
作者：
M. Hervig;J. Plane;D. Siskind;W. Feng;C. Bardeen;S. Bailey
两个半球的太阳掩星冰实验（SOFIE）的测量结果用于表征中间层的流星烟雾，并估计进入地球大气层的流星通量。提出了根据北半球 (NH) 日出测量结果反演的新烟雾消光数据，补充了之前报告的南半球 (SH) 日落观测结果。对于中层烟雾的季节和高度依赖性，日出观测结果与整个大气群落气候模型（WACCM）的模拟非常一致。 SOFIE-WACCM 比较假设中间层中的烟雾纯粹以富铁橄榄石形式存在。这是合理的，因为 SOFIE 通过光学方式检测到橄榄石，预计流星烧蚀会将类似数量的最丰富元素（铁、镁和硅）注入中间层，并且理论和实验室实验预计会出现橄榄石。此外，SOFIE 假设富含铁橄榄石确定的消融流星流入量 (AMI) 和总流星流入量与最近基于模型和观测的独立调查一致。 SOFIE 2007 年至 2021 年的观测表明，全球 AMI 为每天 7.3 ± 2.2 公吨 (t d−1)，相当于总流入量（烧蚀加上残存物质）为 24.7 ± 7.3 t d−1。最后，结果表明北半球极地冬季中间层的下降比南半球冬季更强。 SOFIE 和 WACCM 的烟雾和水蒸气结果表明了极地纬度的半球不对称性。
Measurements from the Solar Occultation For Ice Experiment (SOFIE) in both hemispheres are used to characterize meteoric smoke in the mesosphere and to estimate the meteoric flux into Earth's atmosphere. New smoke extinction retrievals from sunrise measurements in the Northern Hemisphere (NH) are presented, which complement the previously reported sunset observations in the Southern Hemisphere (SH). The sunrise observations are in good agreement with simulations from the Whole Atmosphere Community Climate Model (WACCM), for both the seasonal and height dependence of smoke in the mesosphere. The SOFIE‐WACCM comparisons assumed that smoke in the mesosphere exists purely as Fe‐rich olivine. This is justified because olivine is detected optically by SOFIE, meteoric ablation is predicted to inject similar quantities of the most abundant elements (Fe, Mg, and Si) into the mesosphere, and olivine is anticipated by theory and laboratory experiments. In addition, the ablated meteoric influx (AMI) and total meteoric influx determined from SOFIE assuming Fe‐rich olivine is in agreement with a recent and independent investigation based on models and observations. SOFIE observations from 2007 to 2021 indicate a global AMI of 7.3 ± 2.2 metric tons per day (t d−1), which corresponds to a total influx (ablated plus surviving material) of 24.7 ± 7.3 t d−1. Finally, the results indicate stronger descent in the NH polar winter mesosphere than in the SH winter. This hemispheric asymmetry at polar latitudes is indicated by smoke and water vapor results from both SOFIE and WACCM.
DOI：
10.1002/jgrd.50708
发表时间：
2013-08
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
W. Feng;D. Marsh;M. Chipperfield;D. Janches;J. Höffner;F. Yi;J. Plane
通讯作者：
W. Feng;D. Marsh;M. Chipperfield;D. Janches;J. Höffner;F. Yi;J. Plane
流星烧蚀的化学模型
影响因子：
6.3
作者：
Vondrak T
通讯作者：
Vondrak T