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Statistical Survey of Magnetic Forces Associated With Earthward Bursty Bulk Flows Measured by MMS 2017-2021

Pitkänen, Timo, 1979- (författare)
Umeå universitet,Institutionen för fysik,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China,Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.
Chong, Ghai Siung (författare)
Umeå universitet,Institutionen för fysik,Umeå Univ, Dept Phys, Umeå, Sweden.
Hamrin, Maria, 1972- (författare)
Umeå universitet,Institutionen för fysik,Umeå Univ, Dept Phys, Umeå, Sweden.
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Kullen, Anita (författare)
KTH,Rymd- och plasmafysik,Space and Plasma Physics, School of Electrical Engineering and Computer Science, Royal Institute of Technology, Stockholm, Sweden
Karlsson, Tomas, 1964- (författare)
KTH,Rymd- och plasmafysik,Space and Plasma Physics, School of Electrical Engineering and Computer Science, Royal Institute of Technology, Stockholm, Sweden
Park, J. -S (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Nowada, M. (författare)
Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Yao, S. T. (författare)
Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Degeling, A. W. (författare)
Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Tian, A. M. (författare)
Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Shi, Q. Q. (författare)
Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai, Peoples R China.,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
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 (creator_code:org_t)
American Geophysical Union (AGU), 2023
2023
Engelska.
Ingår i: Journal of Geophysical Research - Space Physics. - : American Geophysical Union (AGU). - 2169-9380 .- 2169-9402. ; 128:5
Relaterad länk:
https://urn.kb.se/re...
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https://doi.org/10.1...
https://urn.kb.se/re...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • We investigate the magnetic forces (the magnetic pressure gradient force, the curvature force, and their sum the j x B-force) associated with earthward bursty bulk flows (BBFs) using Magnetospheric Multiscale (MMS) data from five tail seasons (2017-2021). For the first time, the magnetic forces are inferred downtail of XGSM = -20 R-E and in the GSM XY and YZ planes. The results suggest that BBFs tend to be accelerated earthward by the magnetic pressure gradient force tailward of similar to 19 R-E and decelerated closer to that distance in the 2017-2018 data. The force magnitudes increase with distance. This is in accordance with earlier Cluster results. In the 2019-2021 data, the pressure gradient force magnitudes are generally smaller and no clear distance for the acceleration reversal can be determined. The curvature forces for both 2017-2018 and 2019-2021 BBFs indicate earthward acceleration independent of distance, consistent with the Cluster measurements. The sum, the j x B-force, suggests for the 2017-2018 BBFs earthward acceleration tailward of XGSM similar to 15 R-E and deceleration within that distance, also consistent with Cluster. In contrast, the 2019-2021 BBFs show general earthward acceleration by j x B independent of distance. In the GSM XY plane, the average (j x B)(xy) vectors are earthward, and in the premidnight and postmidnight dawnward for the 2017-2018 BBFs. For 2019-2021, the average (j x B)(xy) vectors have components toward the tail center. In the GSM YZ plane, the average (j x B)(yz) vectors are toward the neutral sheet.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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