SSUSI Publications





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Found 4 entries in the Bibliography.


Showing entries from 1 through 4


2014

OVATION Prime-2013: Extension of auroral precipitation model to higher disturbance levels

OVATION Prime (OP) is an auroral precipitation model parameterized by solar wind driving. Distinguishing features of the model include an optimized solar wind-magnetosphere coupling function (dΦMP/dt) which predicts auroral power significantly better than\ Kpor other traditional parameters, the separation of aurora into categories (diffuse aurora, monoenergetic, broadband, and ion), the inclusion of seasonal variations, and separate parameter fits for each magnetic latitude (MLA ...

Newell, P.; Liou, K.; Zhang, Y.; Sotirelis, T.; Paxton, L.; Mitchell, E.;

YEAR: 2014     DOI: 10.1002/swe.v12.610.1002/2014SW001056

Aurora; forecasting; precipitation

Local Geomagnetic Indices and the Prediction of Auroral Power

The aurora has been related to magnetometer observations for centuries, and to geomagnetic indices for decades. As the number of stations and data processing power increases, just how auroral power (AP) relates to geomagnetic observations becomes a more tractable question. This paper compares Polar UVI AP observations during 1997 with a variety of indices. Local time (LT) versions of the SuperMAG auroral electrojet (SME) are introduced and examined, along with the corresponding upper and lower envelopes (SMU< ...

Newell, P.; Gjerloev, J.;

YEAR: 2014     DOI: 10.1002/2014JA020524

Aurora; indices; auroral electrojet; Pedersen current; prediction

Circumpolar ground-based optical measurements of proton and electron shock aurora

Meridian scanning photometer (MSP) data are combined with global ultraviolet images from the Polar Ultraviolet Imager instrument to estimate the timing and propagation speed of shock auroras previously studied using solely space-based ultraviolet auroral imagery. The multispectral nature of the MSPs, including the presence of a Balmer beta channel, enables the discrimination between proton and electron aurora. Following a near-magnetic noon onset, the occurrence of auroral emissions created by shocked precipitating proton ...

Holmes, J.; Johnsen, M.; Deehr, C.; Zhou, X.-Y.; Lorentzen, D.;

YEAR: 2014     DOI: 10.1002/2013JA019574

Aurora; electron; photometer; proton; scanning; shock

In situ spatiotemporal measurements of the detailed azimuthal substructure of the substorm current wedge

The substorm current wedge (SCW) is a fundamental component of geomagnetic substorms. Models tend to describe the SCW as a simple line current flowing into the ionosphere toward dawn and out of the ionosphere toward dusk, linked by a westward electrojet. We use multispacecraft observations from perigee passes of the Cluster 1 and 4 spacecraft during a substorm on 15 January 2010, in conjunction with ground-based observations, to examine the spatial structuring and temporal variability of the SCW. At this time, the spacecr ...

Forsyth, C.; Fazakerley, A.; Rae, I.; Watt, C.; Murphy, K.; Wild, J.; Karlsson, T.; Mutel, R.; Owen, C.; Ergun, R.; Masson, A.; Berthomier, M.; Donovan, E.; Frey, H.; Matzka, J.; Stolle, C.; Zhang, Y.;

YEAR: 2014     DOI: 10.1002/2013JA019302

Aurora; Field-aligned current; Magnetosphere; Substorm current wedge; Wedgelets



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