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Overview and summary of the Spread F Experiment (SpreadFEx)

Fritts, D. C. and Abdu, M. A. and Batista, B. R. and Batista, I. S. and Batista, P. P. and Buriti, R. and Clemesha, B. R. and Dautermann, Thomas and de Paula, E. R. and Fechine, B. J. and Fejer, B. G. and Gobbi, D. and Haase, J. and Kamalabadi, F. and Kherani, E. A. and Laughman, B. and Lima, P. P. and Liu, H.-L. and Medeiros, A. and Pautet, P.-D. and Riggin, D. M. and Rodrigues, F. S. and São Sabbas, F. and Sobral, J. H. A. and Stamus, P. and Takahashi, H. and Taylor, M. J. and Vadas, S. L. and Vargas, F. and Wrasse, C. M. (2009) Overview and summary of the Spread F Experiment (SpreadFEx). Annales Geophysicae, 27 (5), pp. 2141-2155. Copernicus Publications.

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Official URL: http://www.ann-geophys.net/27/2141/2009/angeo-27-2141-2009.html

Abstract

We provide here an overview of, and a summary of results arising from, an extensive experimental campaign (the Spread F Experiment, or SpreadFEx) performed from September to November 2005, with primary measurements in Brazil. The motivation was to define the potential role of neutral atmosphere dynamics, specifically gravity wave motions propagating upward from the lower atmosphere, in seeding Rayleigh-Taylor instability (RTI) and plasma bubbles extending to higher altitudes. Campaign measurements focused on the Brazilian sector and included ground-based optical, radar, digisonde, and GPS measurements at a number of fixed and temporary sites. Related data on convection and plasma bubble structures were also collected by GOES 12, and the GUVI instrument aboard the TIMED satellite. Initial results of our SpreadFEx analyses are described separately by Fritts et al. (2009). Further analyses of these data provide additional evidence of 1) gravity wave (GW) activity near the mesopause apparently linked to deep convection predominantly to the west of our measurement sites, 2) small-scale GWs largely confined to lower altitudes, 3) larger-scale GWs apparently penetrating to much higher altitudes, 4) substantial GW amplitudes implied by digisonde electron densities, and 5) apparent influences of these perturbations in the lower F-region on the formation of equatorial spread F, RTI, and plasma bubbles extending to much higher altitudes. Other efforts with SpreadFEx data have also yielded 6) the occurrence, locations, and scales of deep convection, 7) the spatial and temporal evolutions of plasma bubbles, 8) 2-D (height-resolved) structures in electron density fluctuations and equatorial spread F at lower altitudes and plasma bubbles above, and 9) the occurrence of substantial tidal perturbations to the large-scale wind and temperature fields extending to bottomside F-layer and higher altitudes. Collectively, our various SpreadFEx analyses suggest direct links between deep tropical convection and large GW perturbations at large spatial scales at the bottomside F-layer and their likely contributions to the excitation of RTI and plasma bubbles extending to much higher altitudes.

Item URL in elib:https://elib.dlr.de/61194/
Document Type:Article
Title:Overview and summary of the Spread F Experiment (SpreadFEx)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fritts, D. C.NorthWest Research AssociatesUNSPECIFIED
Abdu, M. A.UNSPECIFIEDUNSPECIFIED
Batista, B. R.UNSPECIFIEDUNSPECIFIED
Batista, I. S.UNSPECIFIEDUNSPECIFIED
Batista, P. P.UNSPECIFIEDUNSPECIFIED
Buriti, R.UNSPECIFIEDUNSPECIFIED
Clemesha, B. R.UNSPECIFIEDUNSPECIFIED
Dautermann, Thomasthomas.dautermann (at) dlr.deUNSPECIFIED
de Paula, E. R.UNSPECIFIEDUNSPECIFIED
Fechine, B. J.UNSPECIFIEDUNSPECIFIED
Fejer, B. G.UNSPECIFIEDUNSPECIFIED
Gobbi, D.UNSPECIFIEDUNSPECIFIED
Haase, J.Purdue UniversityUNSPECIFIED
Kamalabadi, F.UNSPECIFIEDUNSPECIFIED
Kherani, E. A.UNSPECIFIEDUNSPECIFIED
Laughman, B.UNSPECIFIEDUNSPECIFIED
Lima, P. P.UNSPECIFIEDUNSPECIFIED
Liu, H.-L.UNSPECIFIEDUNSPECIFIED
Medeiros, A.UNSPECIFIEDUNSPECIFIED
Pautet, P.-D.UNSPECIFIEDUNSPECIFIED
Riggin, D. M.UNSPECIFIEDUNSPECIFIED
Rodrigues, F. S.UNSPECIFIEDUNSPECIFIED
São Sabbas, F.UNSPECIFIEDUNSPECIFIED
Sobral, J. H. A.UNSPECIFIEDUNSPECIFIED
Stamus, P.UNSPECIFIEDUNSPECIFIED
Takahashi, H.UNSPECIFIEDUNSPECIFIED
Taylor, M. J.UNSPECIFIEDUNSPECIFIED
Vadas, S. L.UNSPECIFIEDUNSPECIFIED
Vargas, F.UNSPECIFIEDUNSPECIFIED
Wrasse, C. M.UNSPECIFIEDUNSPECIFIED
Date:11 May 2009
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:27
Page Range:pp. 2141-2155
Editors:
EditorsEmail
Kofman, WlodekUNSPECIFIED
Publisher:Copernicus Publications
Status:Published
Keywords:Plasma Bubbles; Ionosphere;Equatorial Spread F; Geomagnetism
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Institute of Communication and Navigation > Navigation
Deposited By: Dautermann, Dr. Thomas
Deposited On:17 Dec 2009 12:00
Last Modified:08 Mar 2018 18:47

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