首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Influence of solar-geomagnetic disturbances on SABER measurements of 4.3 μm emission and the retrieval of kinetic temperature and carbon dioxide
Authors:Christopher J Mertens  Jeremy R Winick  Richard H Picard  David S Evans  Manuel López-Puertas  Peter P Wintersteiner  Xiaojing Xu  Martin G Mlynczak  James M Russell III
Institution:1. NASA Langley Research Center, 21 Langley Boulevard, MS 401B, Hampton, VA 23681-2199, USA;2. Air Force Research Laboratories, Hanscom Air Force Base, Hanscom, MA 01731-3010, USA;3. NOAA Space Weather Prediction Center, 325 Broadway, Boulder, CO 80303-0000, USA;4. Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, Granada 18080, Spain;5. ARCON Corporation, 260 Bear Hill Road, Waltham, MA 02451, USA;6. SSAI, Inc., 1 Enterprise Parkway, Hampton VA 23666, USA;g NASA Langley Research Center, 21 Langley Boulevard, MS 420, Hampton, VA 23681-2199, USA;h Hampton University, 23 Tyler Street, Hampton VA 23668, USA
Abstract:Thermospheric infrared radiance at 4.3 μm is susceptible to the influence of solar-geomagnetic disturbances. Ionization processes followed by ion-neutral chemical reactions lead to vibrationally excited NO+ (i.e., NO+(v)) and subsequent 4.3 μm emission in the ionospheric E-region. Large enhancements of nighttime 4.3 μm emission were observed by the TIMED/SABER instrument during the April 2002 and October–November 2003 solar storms. Global measurements of infrared 4.3 μm emission provide an excellent proxy to observe the nighttime E-region response to auroral dosing and to conduct a detailed study of E-region ion-neutral chemistry and energy transfer mechanisms. Furthermore, we find that photoionization processes followed by ion-neutral reactions during quiescent, daytime conditions increase the NO+ concentration enough to introduce biases in the TIMED/SABER operational processing of kinetic temperature and CO2 data, with the largest effect at summer solstice. In this paper, we discuss solar storm enhancements of 4.3 μm emission observed from SABER and assess the impact of NO+(v) 4.3 μm emission on quiescent, daytime retrievals of Tk/CO2 from the SABER instrument.
Keywords:SABER  Temperature  Carbon Dioxide (CO2)  Infrared remote sensing  Non-LTE  Radiation Transfer  Ionosphere E-Region  Magnetic Storms  E-Region Ion-Neutral Chemistry
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号