Download Geospace Mass and Energy Flow: Results From the by James L. Horwitz, Dennis L. Gallagher, William K. Peterson PDF

By James L. Horwitz, Dennis L. Gallagher, William K. Peterson

Released through the yank Geophysical Union as a part of the Geophysical Monograph sequence, quantity 104.

The foreign Solar-Terrestrial software (ISTP) was once conceived through the distance enterprises of diverse nations as a coordinated attempt to figure out the worldwide circulate of mass, strength and momentum throughout the solar-terrestrial procedure. The actual quarter of curiosity extends from the solar throughout the sunlight wind, to the terrestrial magnetosphere, right down to the ionosphere, with the imperative specialize in the magnetosphere and its coupling with the sun wind and ionosphere. With the release of NASA's POLAR spacecraft in February 1996, the key components of the ISTP application have been in position. This quantity is without doubt one of the first actual compendiums of either new observations and new modeling effects both without delay or in a roundabout way deriving from this significant ISTP project.

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Air Force Office of ScientificResearchtask 2311PL014. We thankR. LeppingandK. W. Ogilvie for the use of theWIND magneticfield andplasmadata. REFERENCES Basinska,E. , W. J. Burke, N. C. Maynard, W. J. Hughes,J. D. Winningham, and W. B. Hanson, Small-scale electrodynamicsof the cusp with northwardinterplanetary magneticfield, J. ,97, 6369, 1992. Burch, J. H. Reiff, R. A. Heelis, R. W. Spiro, and S. A. , 7, 393, 1980. Burke, W. , E. M. Basinska,N. C. Maynard, W. B. Hanson,J. P. Slaven, and J. D. Winningham, Polar cap potential distributionsduring periodsof positive IMF By and BZ, J.

40 •L I , , , OT , ' , i , j' MsH , i i , UT. After this mostlyouter turbulentboundary layer (TBL) (shadowed by dotsin Fig. 1), the spacecraft encounters a ratherregularOT (coreOT, 04:45-04:55 UT) with slightlydeflectedBn andBm as comparedwith the MSH at 05:20-05:30 UT. In the TBL, the irregularitiesin the ion velocityare biggerthan in the regularOT, the Vz of-•100 km/s beingthe dominantaveragevelocitycomponent(seepanels(a)-(c) in Fig 2b). In the TBL center,the ion temperatureevenexceedsthat seenin the OC (see Fig.

1994] for northwardIMF with By > 0. Attention is directedto the fact that even though IMF clock angles for the two events are similar, their differences,along with dipole tilt angle distinctions,are sufficient to produce clear differences in predicted convectionpatternsfor the early aRemoonsector. The model correctlypredictedthat Polar would passthrougha more stagnantregion near 80ø ILT on April 3 than on April 8. A comparisonof the potential distributionsshown in Figures3 and 4 also revealssomesignificantdifferences.

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