Estimation of the Error in the Calculation of the Pressure‐Strain Term: Application in the Terrestrial Magnetosphere
AuthorRoberts, O. W.
Gershman, D. J.
Matthaeus, W. H.
AffiliationLunar and Planetary Laboratory, University of Arizona
KeywordsSpace and Planetary Science
MetadataShow full item record
PublisherAmerican Geophysical Union (AGU)
CitationRoberts, O. W., Vörös, Z., Torkar, K., Stawarz, J., Bandyopadhyay, R., Gershman, D. J., et al. (2023). Estimation of the error in the calculation of the pressure-strain term: Application in the terrestrial magnetosphere. Journal of Geophysical Research: Space Physics, 128, e2023JA031565. https://doi.org/10.1029/2023JA031565
JournalJGR Space Physics
Rights© 2023. American Geophysical Union. All Rights Reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractCalculating the pressure-strain terms has recently been performed to quantify energy conversion between the bulk flow energy and the internal energy of plasmas. It has been applied to numerical simulations and satellite data from the Magnetospheric MultiScale Mission. The method requires spatial gradients of the velocity and the use of the full pressure tensor. Here we present a derivation of the errors associated with calculating the pressure-strain terms from multi-spacecraft measurements and apply it to previously studied examples of magnetic reconnection at the magnetopause and the magnetotail. The errors are small in a dense magnetosheath event but much larger in the more tenuous magnetotail. This is likely due to larger counting statistics in the dense plasma at the magnetopause than in the magnetotail. The propagated errors analyzed in this work are important to understand uncertainties of energy conversion measurements in space plasmas and have applications to current and future multi-spacecraft missions.
Note6 month embargo; first published 10 August 2023
VersionFinal published version
SponsorsAustrian Science Fund