Interplanetary control of thermospheric densities during large magnetic storms

Burke, William J.; Huang, C. Y.; Marcos, F. A.; Wise, J. O.

doi:10.1016/j.jastp.2006.05.027

Cited by 59 publications

(66 citation statements)

References 27 publications

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“…[8] A detailed study by Bowman et al [2008] confirmed initial findings of Burke et al [2007] that Dst is a useful parameter for estimating stormtime heating of the thermosphere and consequent drag exerted on objects in LEO. This result suggested that it would be useful to simplify procedures for extracting Dst proxies from space-based measurements in near real time.…”

Section: Introductionmentioning

confidence: 68%

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

et al. 2011

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[1] We explore the feasibility of using variations in the horizontal component (DB H ) of the Earth's magnetic field as measured by DMSP satellites while crossing the dip equator to estimate the provisional Dst index and the state of the thermosphere in near real time. Equatorial crossings are identified as locations where the vertical component of the main field measured by DMSP satellites vanishes. Local differences between measured and IGRF (epoch 2005) horizontal components (dB H ) were calculated for the years 2005 to 2009. Each year quiet time (0 ≥ Dst ≥ -7 nT) subsets of dB H were identified to establish offset baselines (dB H B ) as functions of longitude along the magnetic equator ( eq ) for each spacecraft. Year-to-year changes in dB H B reflect variations of the Earth's main field, indicating that baseline calculations must be updated at regular intervals for each spacecraft. Running-averaged values of DB H (t) = dB H ( eq , t) − dB H B ( eq , t) inferred from combined DMSP F16 and F17 data streams are shown to follow variations in Dst during the test interval. The method is also shown to apply during the magnetic superstorms of late 2003. Except during the late main phase, increases in globally averaged exospheric temperatures inferred from DB H and provisional Dst time series are in reasonable agreement with those inferred from measurements by accelerometers on the GRACE satellites.

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Section: Introductionmentioning

confidence: 68%

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

et al. 2011

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“…It should be noted that there is a difference between the localized response and the global thermospheric response. We have reported earlier on the global response which takes place on time scales comparable to that of Sym H during the main phase (Burke et al 2007(Burke et al , 2010Huang et al 2008Huang et al , 2014a, i.e. hours.…”

Section: Discussionmentioning

confidence: 95%

Ionosphere-thermosphere (IT) response to solar wind forcing during magnetic storms

Huang

et al. 2016

J. Space Weather Space Clim.

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During magnetic storms, there is a strong response in the ionosphere and thermosphere which occurs at polar latitudes. Energy input in the form of Poynting flux and energetic particle precipitation, and energy output in the form of heated ions and neutrals have been detected at different altitudes and all local times. We have analyzed a number of storms, using satellite data from the Defense Meteorological Satellite Program (DMSP), the Gravity Recovery and Climate Experiment (GRACE), Gravity field and steady-state Ocean Circulation Explorer (GOCE), and Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission. Poynting flux measured by instruments on four DMSP spacecraft during storms which occurred in 2011-2012 was observed in both hemispheres to peak at both auroral and polar latitudes. By contrast, the measured ion temperatures at DMSP and maxima in neutral density at GOCE and GRACE altitudes maximize in the polar region most frequently with little evidence of Joule heating at auroral latitudes at these spacecraft orbital locations.

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“…Under low (A p =3-7) geomagnetic activity, we have positive NmF2 deviations during daytime hours. It may be pertinent to note that according to Burke et al (2007), significant energy can be deposited in the ionosphere without corresponding magnetic perturbations on the ground. Therefore, low levels of geomagnetic activity measured in conventional magnetic indices may not adequately present a real situation in the ionosphere.…”

Section: Discussionmentioning

confidence: 99%

“…According to Davis et al (1979) nighttime F2-region electron density enhancements have a maximum near =55 • due to latitudinal dependence of the magnetic tube electron content. Magnetic tubes with L>3 are only partly filled with plasma due to long time of recovery after geomagnetic disturbances (Carpenter and Park, 1973;Krinberg and Tashilin, 1984).…”

Section: Analysis Of the Publicationsmentioning

confidence: 99%

Pre-storm <I>Nm</I>F2 enhancements at middle latitudes: delusion or reality?

Mikhailov

Perrone

2009

Ann. Geophys.

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Abstract.A critical analysis of recent publications devoted to the NmF2 pre-storm enhancements is performed. There are no convincing arguments that the observed cases of NmF2 enhancements at middle and sub-auroral latitudes bear a relation to the following magnetic storms. In all cases considered the NmF2 pre-storm enhancements were due to previous geomagnetic storms, moderate auroral activity or they presented the class of positive quiet time events (Qdisturbances). Therefore, it is possible to conclude that there is no such an effect as the pre-storm NmF2 enhancement as a phenomenon inalienably related to the following magnetic storm. The observed nighttime NmF2 enhancements at subauroral latitudes may result from plasma transfer from the plasma ring area by meridional thermospheric wind. Enhanced plasmaspheric fluxes into the nighttime F2-region resulted from westward substorm-associated electric fields is another possible source of nighttime NmF2 enhancements. Daytime positive Q-disturbances occurring under very low geomagnetic activity level may be related to the dayside cusp activity.

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Interplanetary control of thermospheric densities during large magnetic storms

Cited by 59 publications

References 27 publications

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

Ionosphere-thermosphere (IT) response to solar wind forcing during magnetic storms

Pre-storm <I>Nm</I>F2 enhancements at middle latitudes: delusion or reality?

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Interplanetary control of thermospheric densities during large magnetic storms

Cited by 59 publications

References 27 publications

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

EstimatingDstindices and exospheric temperatures from equatorial magnetic fields measured by DMSP satellites

Ionosphere-thermosphere (IT) response to solar wind forcing during magnetic storms

Pre-storm &lt;I&gt;Nm&lt;/I&gt;F2 enhancements at middle latitudes: delusion or reality?

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Pre-storm <I>Nm</I>F2 enhancements at middle latitudes: delusion or reality?