Hervig, ME, Plane, JMC orcid.org/0000-0003-3648-6893, Siskind, DE et al. (3 more authors) (2021) New Global Meteoric Smoke Observations From SOFIE: Insight Regarding Chemical Composition, Meteoric Influx, and Hemispheric Asymmetry. Journal of Geophysical Research: Atmospheres, 126 (13). e2021JD035007. ISSN 2169-897X
Abstract
Measurements from the Solar Occultation For Ice Experiment (SOFIE) in both hemispheres are used to characterize meteoric smoke in the mesosphere and to estimate the meteoric flux into Earth's atmosphere. New smoke extinction retrievals from sunrise measurements in the Northern Hemisphere (NH) are presented, which complement the previously reported sunset observations in the Southern Hemisphere (SH). The sunrise observations are in good agreement with simulations from the Whole Atmosphere Community Climate Model (WACCM), for both the seasonal and height dependence of smoke in the mesosphere. The SOFIE-WACCM comparisons assumed that smoke in the mesosphere exists purely as Fe-rich olivine. This is justified because olivine is detected optically by SOFIE, meteoric ablation is predicted to inject similar quantities of the most abundant elements (Fe, Mg, and Si) into the mesosphere, and olivine is anticipated by theory and laboratory experiments. In addition, the ablated meteoric influx (AMI) and total meteoric influx determined from SOFIE assuming Fe-rich olivine is in agreement with a recent and independent investigation based on models and observations. SOFIE observations from 2007 to 2021 indicate a global AMI of 7.3 ± 2.2 metric tons per day (t d−1), which corresponds to a total influx (ablated plus surviving material) of 24.7 ± 7.3 t d−1. Finally, the results indicate stronger descent in the NH polar winter mesosphere than in the SH winter. This hemispheric asymmetry at polar latitudes is indicated by smoke and water vapor results from both SOFIE and WACCM.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021. American Geophysical Union. All Rights Reserved. This is the peer reviewed version of the following article: Hervig, M. E., Plane, J. M. C., Siskind, D. E., Feng, W., Bardeen, C. G., & Bailey, S. M. (2021). New global meteoric smoke observations from SOFIE: Insight regarding chemical composition, meteoric influx, and hemispheric asymmetry. Journal of Geophysical Research: Atmospheres, 126, e2021JD035007, which has been published in final form at https://doi.org/10.1029/2021JD035007. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
Keywords: | meteoric smoke; meteoric influx; SOFIE; WACCM |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Funding Information: | Funder Grant number EU - European Union 291332 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Jul 2021 13:33 |
Last Modified: | 22 Dec 2021 01:38 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2021jd035007 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:175897 |