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10 Be CONCENTRATIONS IN SNOW AT LAW DOME, ANTARCTICA FOLLOWING THE 29 OCTOBER 2003 AND 20 JANUARY 2005 SOLAR COSMIC RAY EVENTS

2009; Copernicus Publications; Linguagem: Inglês

10.1142/9789812836205_0020

1680-7359

Joel B Pedro, Andrew Smith, M. L. Duldig, Andrew Klekociuk, Krista Simon, M. A. J. Curran, T. D. van Ommen, D. A. Fink, Vin Morgan, Benjamin K. Galton‐Fenzi,

Atmospheric Ozone and Climate

Advances in GeosciencesAdvances in Geosciences, pp. 285-303 (2009) No Access10Be CONCENTRATIONS IN SNOW AT LAW DOME, ANTARCTICA FOLLOWING THE 29 OCTOBER 2003 AND 20 JANUARY 2005 SOLAR COSMIC RAY EVENTSJ. B. PEDRO, A. M. SMITH, M. L. DULDIG, A. R. KLEKOCIUK, K. J. SIMON, M. A. J. CURRAN, T. D. VAN OMMEN, D. A. FINK, V. I. MORGAN, and B. K. GALTON-FENZIJ. B. PEDROInstitute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, Tasmania 7005, AustraliaAntarctic Climate and Ecosystems CRC, Hobart, Tasmania 7005, Australia, A. M. SMITHAustralian Nuclear Science and Technology Organisation, Menai, New South Wales 2234, Australia, M. L. DULDIGAustralian Antarctic Division, Kingston, Tasmania 7050, Australia, A. R. KLEKOCIUKAustralian Antarctic Division, Kingston, Tasmania 7050, Australia, K. J. SIMONAustralian Nuclear Science and Technology Organisation, Menai, New South Wales 2234, Australia, M. A. J. CURRANAntarctic Climate and Ecosystems CRC, Hobart, Tasmania 7005, AustraliaAustralian Antarctic Division, Kingston, Tasmania 7050, Australia, T. D. VAN OMMENAntarctic Climate and Ecosystems CRC, Hobart, Tasmania 7005, AustraliaAustralian Antarctic Division, Kingston, Tasmania 7050, Australia, D. A. FINKAustralian Nuclear Science and Technology Organisation, Menai, New South Wales 2234, Australia, V. I. MORGANAntarctic Climate and Ecosystems CRC, Hobart, Tasmania 7005, AustraliaAustralian Antarctic Division, Kingston, Tasmania 7050, Australia, and B. K. GALTON-FENZIInstitute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, Tasmania 7005, AustraliaAntarctic Climate and Ecosystems CRC, Hobart, Tasmania 7005, Australiahttps://doi.org/10.1142/9789812836205_0020Cited by:5 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: Recent model calculations have attempted to quantify the contribution of major energetic solar cosmic ray (SCR) events to 10Be production.1,2 In this study we compare modeled 10Be production by SCR events to measured 10Be concentrations in a Law Dome snow pit record. The snow pit record spans 2.7 years, providing a quasi-monthly 10Be sampling resolution which overlaps with the SCR events of 29 Oct 2003 and 20 Jan 2005. These events were calculated to increase monthly 10Be production in the polar atmosphere (>65° S geomagnetic latitude) by ~60% and ~120% above the GCR background, respectively2. A strong peak in 10Be concentrations (>4σ above the 2.7 y mean value) was observed ~1 month after the 20 Jan 2005 event. By contrast, no signal in 10Be concentrations was observed following the weaker 29 Oct 2003 series of events. The concentration of 10Be in ice core records involves interplay between production, transport, and deposition processes. We used a particle dispersion model to assess vertical and meridional transport of aerosols from the lower stratosphere where SCR production of 10Be is expected to occur, to the troposphere from where deposition to the ice sheet occurs. Model results suggested that a coherent SCR production signal could be transported to the troposphere within weeks to months following both SCR events. We argue that only the 20 Jan 2005 SCR event was observed in measured concentrations due to favorable atmospheric transport, relatively high production yield compared to the 29 Oct 2003 event, and a relatively high level of precipitation in the Law Dome region in the month following the event. This result encourages further examination of SCR signals in 10Be ice core data. FiguresReferencesRelatedDetailsCited By 5The Signal of Solar Storms Embedded in Cosmogenic Radionuclides: Detectability and UncertaintiesF. Mekhaldi, F. Adolphi, K. Herbst and R. Muscheler5 August 2021 | Journal of Geophysical Research: Space Physics, Vol. 126, No. 8On the Atmospheric Transport and Deposition of the Cosmogenic Radionuclides (10Be): A ReviewU. Heikkilä, J. Beer, J. A. Abreu and F. Steinhilber14 October 2011 | Space Science Reviews, Vol. 176, No. 1-4ICE CORE METHODS | 10Be and Cosmogenic Radionuclides in Ice CoresR. Muscheler1 Jan 2013Reprocessing of 10B-contaminated 10Be AMS targetsK.J. Simon, J.B. Pedro, A.M. Smith, D.P. Child and D. Fink1 Jan 2013 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 294On the Atmospheric Transport and Deposition of the Cosmogenic Radionuclides (10Be): A ReviewU. Heikkilä, J. Beer, J. A. Abreu and F. Steinhilber1 Jan 2011 Advances in GeosciencesMetrics History PDF download