Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity
International audience The formation of large nitric acid trihydrate (NAT) particles has important implications for denitrification and ozone depletion. Existing theories can't explain the recent observations of large NAT particles over wide Arctic regions at temperature above ice frost point....
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2004
|
Subjects: | |
Online Access: | https://hal.science/hal-00301120 https://hal.science/hal-00301120/document https://hal.science/hal-00301120/file/acpd-4-1037-2004.pdf |
id |
ftinsu:oai:HAL:hal-00301120v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00301120v1 2023-11-12T04:13:17+01:00 Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity Yu, F. Atmospheric Sciences Research Center (ASRC) University at Albany SUNY State University of New York (SUNY)-State University of New York (SUNY) 2004-02-11 https://hal.science/hal-00301120 https://hal.science/hal-00301120/document https://hal.science/hal-00301120/file/acpd-4-1037-2004.pdf en eng HAL CCSD European Geosciences Union hal-00301120 https://hal.science/hal-00301120 https://hal.science/hal-00301120/document https://hal.science/hal-00301120/file/acpd-4-1037-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301120 Atmospheric Chemistry and Physics Discussions, 2004, 4 (1), pp.1037-1062 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2004 ftinsu 2023-10-25T16:27:07Z International audience The formation of large nitric acid trihydrate (NAT) particles has important implications for denitrification and ozone depletion. Existing theories can't explain the recent observations of large NAT particles over wide Arctic regions at temperature above ice frost point. Our analyses reveal that high-energy comic rays may induce the freezing of supercooled HNO 3 ?H 2 O?H 2 SO 4 droplets when they penetrate these thermodynamically unstable droplets. The cosmic ray-induced freezing (CRIF) is consistent with the observed highly selective formation of NAT particles. We suggest that the physics behind the CRIF mechanism is the reorientation of polar solution molecules into the crystalline configuration in the strong electrical fields of moving secondary ions generated by passing cosmic rays. Our simulations indicate that strong solar proton events (SPEs) may significantly enhance the formation of large NAT particles and denitrification. The CRIF mechanism can explain the high correlations between the thin nitrate-rich layers in polar ice cores and major SPEs. The observed enhancement in aerosol backscattering ratio at PSC layers shortly after an SPE and the significant precipitation velocity of the enhanced PSC payers also provide strong support for the CRIF mechanism. Article in Journal/Newspaper Arctic Institut national des sciences de l'Univers: HAL-INSU Arctic |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Yu, F. Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The formation of large nitric acid trihydrate (NAT) particles has important implications for denitrification and ozone depletion. Existing theories can't explain the recent observations of large NAT particles over wide Arctic regions at temperature above ice frost point. Our analyses reveal that high-energy comic rays may induce the freezing of supercooled HNO 3 ?H 2 O?H 2 SO 4 droplets when they penetrate these thermodynamically unstable droplets. The cosmic ray-induced freezing (CRIF) is consistent with the observed highly selective formation of NAT particles. We suggest that the physics behind the CRIF mechanism is the reorientation of polar solution molecules into the crystalline configuration in the strong electrical fields of moving secondary ions generated by passing cosmic rays. Our simulations indicate that strong solar proton events (SPEs) may significantly enhance the formation of large NAT particles and denitrification. The CRIF mechanism can explain the high correlations between the thin nitrate-rich layers in polar ice cores and major SPEs. The observed enhancement in aerosol backscattering ratio at PSC layers shortly after an SPE and the significant precipitation velocity of the enhanced PSC payers also provide strong support for the CRIF mechanism. |
author2 |
Atmospheric Sciences Research Center (ASRC) University at Albany SUNY State University of New York (SUNY)-State University of New York (SUNY) |
format |
Article in Journal/Newspaper |
author |
Yu, F. |
author_facet |
Yu, F. |
author_sort |
Yu, F. |
title |
Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
title_short |
Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
title_full |
Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
title_fullStr |
Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
title_full_unstemmed |
Formation of large NAT particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
title_sort |
formation of large nat particles and denitrification in polar stratosphere: possible role of cosmic rays and effect of solar activity |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00301120 https://hal.science/hal-00301120/document https://hal.science/hal-00301120/file/acpd-4-1037-2004.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301120 Atmospheric Chemistry and Physics Discussions, 2004, 4 (1), pp.1037-1062 |
op_relation |
hal-00301120 https://hal.science/hal-00301120 https://hal.science/hal-00301120/document https://hal.science/hal-00301120/file/acpd-4-1037-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331355960442880 |