Impact of sudden stratospheric warmings on equatorial ionization anomaly

Impact of sudden stratospheric warmings on equatorial ionization anomaly

L. P. Goncharenko,1 A. J. Coster,1 J. L. Chau,2 and C. E. Valladares3

1Haystack Observatory, Massachusetts Institute of Technology,Westford, Massachusetts, USA. 2Radio Observatorio de Jicamarca, Instituto Geofisico del Peru, Lima,Peru.3Institute for Scientific Research, Boston College, Chestnut Hill,Massachusetts, USA.

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115, A00G07, doi:10.1029/2010JA015400, 2010

Correspondence to:

Cesar Valladares
Esta dirección electrónica esta protegida contra spam bots. Necesita activar JavaScript para visualizarla

Key Points:


We investigate the ionospheric response to several stratospheric sudden warming events which occurred in Northern Hemisphere winters of 2008 and 2009 during solar minimum conditions. We use GPS total electron content data in a broad latitudinal region at ±40° geographic latitude and a single longitude, 75°W. In all cases, we find a strong daytime ionospheric response to stratospheric sudden warmings. This response is characterized by a semidiurnal character, large amplitude, and persistence of perturbations for up to 3 weeks after the peak in high‐latitude stratospheric temperatures. The ionospheric perturbations at the lower latitudes usually begin a few days after the peak in stratospheric temperature and are observed as an enhancement of the equatorial ionization anomaly (EIA) in the morning sector and a suppression of the EIA in the afternoon sector. There is also evidence of a secondary enhancement in the postsunset hours. Once observed in the low latitudes, the phase of semidiurnal perturbations progressively shifts to later local times in subsequent days. This progressive shift occurs at a different rate for different stratospheric warming events. The large magnitude and persistence of ionospheric perturbations, together with the predictability of stratospheric sudden warmings several days in advance, present an opportunity to investigate these phenomena in a systematic manner which may eventually lead to a multiday forecast of low‐latitude ionosphere conditions.

*click here to read this paper.

Primer Taller de Trabajo Low-Latitude Ionospheric Sensor Network

El taller tiene la finalidad de instruir a científicos, ingenieros y estudiantes de América del Sur en como emplear receptores de GPS y magnetómetros, para diagnosticar el estado y variabilidad de la ionósfera de bajas latitudes, e instruir en el procedimiento de como instalar y operar el estado...

» Magnetómetro LISN en Argentina

» LISN en la búsqueda de formar un observatorio distribuido
Acerca de LISN      |      Equipos      |      Información técnica y científica      |      Estaciones      |      Datos      |      Miscelánea      |      Descargas      |      Contacto
Copyright © 2017 Low-latitude Ionospheric Sensor Network    |    Radio Observatorio de Jicamarca     |     Instituto Geofísico del Perú