A new model of meteoric calcium in the mesosphere and lower thermosphere

© Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)

Detalhes bibliográficos
Autores: Plane, J., Feng, W., Gómez Martín, Juan Carlos, Gerding, M., Raizada, S.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/210582
Acesso em linha:http://hdl.handle.net/10261/210582
Access Level:acceso abierto
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spelling A new model of meteoric calcium in the mesosphere and lower thermospherePlane, J.Feng, W.Gómez Martín, Juan CarlosGerding, M.Raizada, S.© Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)Meteoric ablation produces layers of metal atoms in the mesosphere and lower thermosphere (MLT). It has been known for more than 30 years that the Ca atom layer is depleted by over 2 orders of magnitude compared with Na, despite these elements having nearly the same elemental abundance in chondritic meteorites. In contrast, the Ca+ ion abundance is depleted by less than a factor of 10. To explain these observations, a large database of neutral and ion-molecule reaction kinetics of Ca species, measured over the past decade, was incorporated into the Whole Atmosphere Community Climate Model (WACCM). A new meteoric input function for Ca and Na, derived using a chemical ablation model that has been tested experimentally with a Meteoric Ablation Simulator, shows that Ca ablates almost 1 order of magnitude less efficiently than Na. WACCM-Ca simulates the seasonal Ca layer satisfactorily when compared with lidar observations, but tends to overestimate Ca+ measurements made by rocket mass spectrometry and lidar. A key finding is that CaOH and CaCO3 are very stable reservoir species because they are involved in essentially closed reaction cycles with O2 and O. This has been demonstrated experimentally for CaOH, and in this study for CaCO3 using electronic structure and statistical rate theory. Most of the neutral Ca is therefore locked in these reservoirs, enabling rapid loss through polymerization into meteoric smoke particles, and this explains the extreme depletion of Ca.© Author(s) 2018.This work was supported by the European Research Council (project 291332 - CODITA). Shikha Raizada acknowledges NSF grant 1839012 to the Arecibo Observatory, which is operated by the University of Central Florida under a cooperative agreement with the National Science Foundation (AST-1744119), and in alliance with Yang Enterprises and Ana G. Mendez Universidad Metropolitana.European Geophysical SocietyEuropean Research CouncilNational Science Foundation (US)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020182020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/210582reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020291332/http://dx.doi.org/10.5194/acp-18-14799-2018Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2105822026-05-22T06:33:51Z
dc.title.none.fl_str_mv A new model of meteoric calcium in the mesosphere and lower thermosphere
title A new model of meteoric calcium in the mesosphere and lower thermosphere
spellingShingle A new model of meteoric calcium in the mesosphere and lower thermosphere
Plane, J.
title_short A new model of meteoric calcium in the mesosphere and lower thermosphere
title_full A new model of meteoric calcium in the mesosphere and lower thermosphere
title_fullStr A new model of meteoric calcium in the mesosphere and lower thermosphere
title_full_unstemmed A new model of meteoric calcium in the mesosphere and lower thermosphere
title_sort A new model of meteoric calcium in the mesosphere and lower thermosphere
dc.creator.none.fl_str_mv Plane, J.
Feng, W.
Gómez Martín, Juan Carlos
Gerding, M.
Raizada, S.
author Plane, J.
author_facet Plane, J.
Feng, W.
Gómez Martín, Juan Carlos
Gerding, M.
Raizada, S.
author_role author
author2 Feng, W.
Gómez Martín, Juan Carlos
Gerding, M.
Raizada, S.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Research Council
National Science Foundation (US)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)
publishDate 2018
dc.date.none.fl_str_mv 2018
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/210582
url http://hdl.handle.net/10261/210582
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020291332/
http://dx.doi.org/10.5194/acp-18-14799-2018
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv European Geophysical Society
publisher.none.fl_str_mv European Geophysical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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