{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,13]],"date-time":"2026-09-13T15:14:29Z","timestamp":1789312469077,"version":"build-2803163510"},"reference-count":34,"publisher":"American Geophysical Union (AGU)","issue":"1","license":[{"start":{"date-parts":[[2021,12,30]],"date-time":"2021-12-30T00:00:00Z","timestamp":1640822400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000104","name":"National Aeronautics and Space Administration","doi-asserted-by":"publisher","award":["NNH10CC04C"],"award-info":[{"award-number":["NNH10CC04C"]}],"id":[{"id":"10.13039\/100000104","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["agupubs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["JGR Space Physics"],"published-print":{"date-parts":[[2022,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Characterizing C<jats:sup>+<\/jats:sup> ions in the Martian ionosphere is important for understanding the history of the Martian atmosphere and surface due to its place in understanding carbon escape. Measuring minor ions, like C<jats:sup>+<\/jats:sup>, which are close in mass to major atmospheric ions, in this case O<jats:sup>+<\/jats:sup>, is difficult, requiring fitting algorithms and accurate background subtraction. Accurate measurement of these species is essential for understanding chemistry and transport in the ionosphere. In this paper, we use data from the Mars Atmospheric and Volatile EvolutioN SupraThermal And Thermal Ion Composition (MAVEN\u2010STATIC) sensor to report the first C<jats:sup>+<\/jats:sup> fluxes measured in the Martian magnetotail. We will describe a multistep method of background subtraction as well as fitting routines that are used to extract C<jats:sup>+<\/jats:sup> fluxes from a 40\u2010orbit subset of STATIC data. Our results show tailward fluxes in both optical shadow and the adjacent sunlit magnetotail at high altitudes (3,000\u00a0km) and Mars\u2010ward at low altitudes (2,000\u00a0km) in shadow. These local flux values are similar to estimates of neutral carbon fluxes from photochemical escape. However, total carbon loss comparisons will require a more comprehensive study of integrated C<jats:sup>+<\/jats:sup> loss over a larger data set from the Martian magnetotail.<\/jats:p>","DOI":"10.1029\/2021ja029635","type":"journal-article","created":{"date-parts":[[2021,12,16]],"date-time":"2021-12-16T08:14:07Z","timestamp":1639642447000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Carbon Ion Fluxes at Mars: First Results of Tailward Flows From MAVEN\u2010STATIC"],"prefix":"10.1029","volume":"127","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7937-0957","authenticated-orcid":false,"given":"N. B.","family":"Pickett","sequence":"first","affiliation":[{"name":"Space Sciences Laboratory  Berkeley CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. P.","family":"McFadden","sequence":"additional","affiliation":[{"name":"Space Sciences Laboratory  Berkeley CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3431-0739","authenticated-orcid":false,"given":"C. M.","family":"Fowler","sequence":"additional","affiliation":[{"name":"Space Sciences Laboratory  Berkeley CA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6250-7665","authenticated-orcid":false,"given":"K. 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