Cusp aurora dependence on interplanetary magnetic field Bz
TLDR
In this paper, the Imager for Magnetopause to Aurora Global Exploration (IMAGE) Spectrographic Imager (SI12) detects Doppler-shifted Lyman alpha emissions created by charge exchange and de-excitation of precipitating protons in the atmosphere.Abstract:
[1] The Imager for Magnetopause to Aurora Global Exploration (IMAGE) Spectrographic Imager (SI12) detects Doppler-shifted Lyman alpha emissions created by charge exchange and de-excitation of precipitating protons in the atmosphere. At high latitudes near local noon, emissions consistent with the location of the cusp foot point have distinct interplanetary magnetic field (IMF) dependence. For northward IMF a spot of emissions is observed poleward of the dayside auroral oval. By tracing the magnetic field lines from this spot using a model magnetosphere it is shown that the cusp foot point maps to a narrow region on the high-latitude magnetopause where antiparallel magnetic reconnection may be occurring. As the IMF turns southward, the spot merges into the auroral oval, producing a broad region of intense emissions centered near local noon. By tracing the magnetic field lines from this broad region using a model magnetosphere it is shown that the cusp foot point maps to a relatively broad region on the dayside magnetopause where component magnetic reconnection may be occurring.read more
Citations
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A magnetic reconnection X-line extending more than 390 Earth radii in the solar wind
Tai Phan,J. T. Gosling,M. S. Davis,Ruth M. Skoug,Marit Øieroset,Robert P. Lin,R. P. Lepping,David J. McComas,Charles W. Smith,H. Rème,André Balogh +10 more
TL;DR: Three-spacecraft observations of accelerated flow associated with reconnection in a current sheet embedded in the solar wind flow imply that reconnection is fundamentally a large-scale process and reveal, surprisingly, that reconnections can operate in a quasi-steady-state manner even when undriven by the external flow.
Journal ArticleDOI
Simultaneous Cluster and IMAGE observations of cusp reconnection and auroral proton spot for northward IMF
Tai Phan,Harald U. Frey,S. Frey,Laura Peticolas,S. A. Fuselier,C. W. Carlson,H. Rème,J. M. Bosqued,André Balogh,M. W. Dunlop,L. M. Kistler,C. G. Mouikis,Iannis Dandouras,J. A. Sauvaud,Stephen B. Mende,J. P. McFadden,George K. Parks,Eberhard Moebius,B. Klecker,G. Paschmann,Masaki Fujimoto,S. M. Petrinec,Maria Federica Marcucci,A. Korth,Rickard Lundin +24 more
TL;DR: In this paper, the Tsyganenko-01 magnetic field model with enhanced solar wind pressure was used to map the magnetic-shear high-latitude magnetopause (MP) location to the vicinity of the IMAGE proton spot.
Journal ArticleDOI
Magnetospheric Multiscale Science Mission Profile and Operations
S. A. Fuselier,S. A. Fuselier,W. S. Lewis,C. Schiff,Robert E. Ergun,James L. Burch,S. M. Petrinec,K. J. Trattner +7 more
TL;DR: The magnetospheric multiscale (MMS) mission and operations are designed to provide the maximum reconnection science as mentioned in this paper, where the mission phases are chosen to investigate reconnection at the dayside magnetopause and in the magnetotail.
Journal ArticleDOI
Probing the boundary between antiparallel and component reconnection during southward interplanetary magnetic field conditions
TL;DR: In this article, a method using three-dimensional plasma observations from the Toroidal Imaging Mass-Angle Spectrograph instrument on the Polar spacecraft as it passes through the northern magnetospheric cusp was used to calculate the distance to the reconnection line and subsequently trace the distance along model magnetic field lines back to the magnetopause.
Journal ArticleDOI
Reversal of global atmospheric ethane and propane trends largely due to US oil and natural gas production
Detlev Helmig,S. Rossabi,Jacques Hueber,P. Tans,Stephen A. Montzka,K. A. Masarie,Kirk Thoning,Christian Plass-Duelmer,Anja Claude,Lucy J. Carpenter,Alastair C. Lewis,Shalini Punjabi,Stefan Reimann,Martin K. Vollmer,Rainer Steinbrecher,James W. Hannigan,Louisa K. Emmons,Emmanuel Mahieu,Bruno Franco,Dan Smale,Andrea Pozzer +20 more
TL;DR: The authors showed that the steady decline in the ethane mole fraction that began in the 1970s1,2,3 halted between 2005 and 2010 in most of the Northern Hemisphere and has since reversed, probably due to North American oil and natural gas emissions.
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