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Case Study on Complex Sporadic E Layers Observed by Gps Radio Occultations : Volume 7, Issue 9 (10/09/2014)

By Yue, X.

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Book Id: WPLBN0004000332
Format Type: PDF Article :
File Size: Pages 34
Reproduction Date: 2015

Title: Case Study on Complex Sporadic E Layers Observed by Gps Radio Occultations : Volume 7, Issue 9 (10/09/2014)  
Author: Yue, X.
Volume: Vol. 7, Issue 9
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Yue, X., Xue, X., Zeng, Z., Kuo, Y., & Schreiner, W. S. (2014). Case Study on Complex Sporadic E Layers Observed by Gps Radio Occultations : Volume 7, Issue 9 (10/09/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: COSMIC Program Office, University Corporation for Atmospheric Research, Boulder, CO, USA. The occurrence of sporadic E (Es) layer has been a hot scientific topic for a long time. Global Navigation Satellite System (GNSS) based Radio Occultation (RO) has been proven a powerful technique on detecting the global Es layers. In this paper, we focus on some cases of complex Es layers based on the RO data from multiple missions processed in UCAR/CDAAC. We first show some examples of multiple Es layers occurred in one RO event. Based on the evaluations between co-located simultaneous RO events and between RO and Lidar observations, it could be concluded that some of these do manifest the multiple Es layered structures. We then show a case of the occurrence of Es in a broad region during a certain time interval. The result is then validated by the independent ionosondes observations. These complex Es structures could be understood well by the popular wind shear theory. We could map the global Es occurrence routinely in the near future given that more RO data will be available. Further statistical studies will enhance our understanding on the Es mechanism. The specification on Es should benefit both the Es based long distance communication and accurate neutral RO retrievals.

Summary
Case study on complex sporadic E layers observed by GPS radio occultations

Excerpt
Abdu, M. A., de Souza, J. R., Batista, I. S., Santos, A. M., Sobral, J. H. A., Rastogi, R. G., and Chandra, H.: The role of electric fields in sporadic E layer formation over low latitudes under quiet and magnetic storm conditions, J. Atmos. Sol.-Terr. Phys., 115–116, 95–105, doi:10.1016/j.jastp.2013.12.003, 2014.; Anthes, R. A.: Exploring Earth's atmosphere with radio occultation: contributions to weather, climate and space weather, Atmos. Meas. Tech., 4, 1077–1103, doi:10.5194/amt-4-1077-2011, 2011.; Arras, C., Wickert, J., Beyerle, G., Heise, S., Schmidt, T., and Jacobi, C.: A global climatology of ionospheric irregularities derived from GPS radio occultation, Geophys. Res. Lett., 35, L14809, doi:10.1029/2008GL034158, 2008.; Arras, C., Jacobi, C., and Wickert, J.: Semidiurnal tidal signature in sporadic E occurrence rates derived from GPS radio occultation measurements at higher midlatitudes, Ann. Geophys., 27, 2555–2563, doi:10.5194/angeo-27-2555-2009, 2009.; Axford, W. I.: The formation and vertical movement of dense ionized layers in the ionosphere due to neutral wind shears, J. Geophys. Res., 68, 769–779, 1963.; Bernhardt, P. A.: The modulation of sporadic-E layers by Kelvin–Helmholtz billows in the neutral atmosphere, J. Atmos. Sol.-Terr. Phys., 64, 1487–1504, 2002.; Bilitza, D. and Reinisch, B. W.: International reference ionosphere 2007: improvements and new parameters, Adv. Space Res., 42, 599–609, doi:10.1016/j.asr.2007.07.048, 2008.; Chu, Y. H. and Wang, C. Y.: Interferometry observations of three-dimensional spatial structures of sporadic E irregularities using the Chung-Li VHF radar, Radio Sci., 32, 817–832, 1997.; Chu, Y. H., Wang, C. Y., Wu, K. H., Chen, K. T., Tzeng, K. J., Su, C. L., Feng, W., and Plane, J. M. C.: Morphology of sporadic E layer retrieved from COSMIC GPS radio occultation measurements: Wind shear theory examination, J. Geophys. Res, 119, 2117–2136, doi:10.1002/2013JA019437, 2014.; Cosgrove, R. B. and Tsunoda, R. T.: Simulation of the nonlinear evolution of the sporadic-E layer instability in the nighttime midlatitude ionosphere, J. Geophys. Res., 108, 1283, doi:10.1029/2002JA009728, 2003.; Dou, X.-K., Xue, X. H., Li, T., Chen, T. D., Chen, C., and Qiu, S.-C.: Possible relations between meteors, enhanced electron density layers, and sporadic sodium layers, J. Geophys. Res., 115, A06311, doi:10.1029/2009JA014575, 2010.; Dou, X. K., Qiu, S. C., Xue, X. H., Chen, T. D., and Ning, B. Q.: Sporadic and thermospheric enhanced sodium layers observed by a lidar chain over China, J. Geophys. Res., 118, 6627–6643, doi:10.1002/jgra.50579, 2013.; Foelsche, U., Scherllin-Pirscher, B., Ladstädter, F., Steiner, A. K., and Kirchengast, G.: Refractivity and temperature climate records from multiple radio occultation satellites consistent within 0.05; Galkin, I. A., Kitrosser, D. F., Kecic, Z., and Reinisch, B. W.: Internet access to ionosondes, J. Atmos. Sol.-Terr. Phy. 61, 181–186, 1999.; Hysell, D. L., Nossa, E., Larsen, M. F., Munro, J., Smith, S., Sulzer, M. P., and González, S. A.: Dynamic instability in the lower thermosphere inferred from irregular sporadic E layers, J. Geophys. Res., 117, A08305, doi:10.1029/2012JA017910, 2012.; Feng, W., Marsh, D. R., Chipperfield, M. P., Janches, D., Hoffner, J., Yi, F., and Plane, J. M. C.: A global atmospheric model of meteoric

 

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