Estimating the Impacts of Radiation Belt Electrons on Atmospheric Chemistry Using FIREBIRD II and Van Allen Probes Observations
Estimating the Impacts of Radiation Belt Electrons on Atmospheric Chemistry Using FIREBIRD II and Van Allen Probes Observations
复制标题
DOI：
10.1029/2020jd033098
复制
发表时间：
2021-03
期刊：
影响因子：
--
通讯作者：
K. Duderstadt;C. L. Huang;H. Spence;S. Smith;J. Blake;A. Crew;A. Johnson;David Klumpar;Daniel R. Marsh;J. Sample;M. Shumko;F. Vitt
中科院分区：
文献类型：
--
作者：
K. Duderstadt;C. L. Huang;H. Spence;S. Smith;J. Blake;A. Crew;A. Johnson;David Klumpar;Daniel R. Marsh;J. Sample;M. Shumko;F. Vitt
本研究认为，从地球的辐射带的电子降水对大气成分的影响，从美国宇航局的货车艾伦探测器和美国国家科学基金会重点调查相对论电子爆发强度，范围和动力学（火鸟II）立方体卫星的观测。货车艾伦探测器（位于辐射带近赤道轨道）和火鸟二号探测器（位于极地低地轨道）在航天器会合期间（2015-2017年）之间的电子通量比率允许估计大气中的降水量。根据货车艾伦探针RBSP-ECT MagEIS数据计算的总辐射带电子含量确定了2013年3月持续10天的电子损失事件，该事件可作为初始案例研究。大气电离配置文件，通过整合单能电离率在整个降水电子通量谱计算，提供输入到NCAR全大气社区气候模式，以量化增强大气中的HOx和NOx和随后的破坏O3在中层大气。结果表明，目前APEEP参数化的辐射带电子耦合模式相互比较项目可能会低估事件的持续时间，以及更高的能量电子的贡献，大气电离和模拟的NOx浓度在中间层和平流层上部。
This study considers the impact of electron precipitation from Earth's radiation belts on atmospheric composition using observations from the NASA Van Allen Probes and NSF Focused Investigations of Relativistic Electron Burst Intensity, Range, and Dynamics (FIREBIRD II) CubeSats. Ratios of electron flux between the Van Allen Probes (in near‐equatorial orbit in the radiation belts) and FIREBIRD II (in polar low Earth orbit) during spacecraft conjunctions (2015–2017) allow an estimate of precipitation into the atmosphere. Total Radiation Belt Electron Content, calculated from Van Allen Probes RBSP‐ECT MagEIS data, identifies a sustained 10‐day electron loss event in March 2013 that serves as an initial case study. Atmospheric ionization profiles, calculated by integrating monoenergetic ionization rates across the precipitating electron flux spectrum, provide input to the NCAR Whole Atmosphere Community Climate Model in order to quantify enhancements of atmospheric HOx and NOx and subsequent destruction of O3 in the middle atmosphere. Results suggest that current APEEP parameterizations of radiation belt electrons used in Coupled Model Intercomparison Project may underestimate the duration of events as well as higher energy electron contributions to atmospheric ionization and modeled NOx concentrations in the mesosphere and upper stratosphere.