An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations
Unexpected high levels of OH and NO were recorded at the South Pole (SP) Atmospheric Research Observatory during the 1998-99 ISCAT field study. Model simulations suggest a major photochemical linkage between observed OH and NO. A detailed comparison of the observations with model predictions reveale...
Main Authors: | , , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2001
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/6xg4d739 |
id |
ftcdlib:oai:escholarship.org:ark:/13030/qt6xg4d739 |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org:ark:/13030/qt6xg4d739 2023-06-11T04:16:44+02:00 An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations Chen, G Davis, D Crawford, J Nowak, JB Eisele, F Mauldin, RL Tanner, D Buhr, M Shetter, R Lefer, B Arimoto, R Hogan, A Blake, D 3633 - 3636 2001-10-01 application/pdf https://escholarship.org/uc/item/6xg4d739 unknown eScholarship, University of California qt6xg4d739 https://escholarship.org/uc/item/6xg4d739 CC-BY Geophysical Research Letters, vol 28, iss 19 Meteorology & Atmospheric Sciences article 2001 ftcdlib 2023-05-29T18:00:26Z Unexpected high levels of OH and NO were recorded at the South Pole (SP) Atmospheric Research Observatory during the 1998-99 ISCAT field study. Model simulations suggest a major photochemical linkage between observed OH and NO. A detailed comparison of the observations with model predictions revealed good agreement for OH at NO levels between 120 and 380 pptv. However, the model tended to overestimate OH for NO levels < 120 pptv, while it underestimated OH at levels > 380 pptv. The reasons for these deviations appear not to involve NO directly but rather HOx radical scavenging for the low NO conditions and additional HOx sources for the high NO conditions. Because of the elevated levels of NO and highly activated HOx photochemistry, the SP was found to be a strong net source of surface ozone. It is quite likely that the strong oxidizing environment found at the South Pole extends over the entire polar plateau. Article in Journal/Newspaper South pole University of California: eScholarship Polar Plateau ENVELOPE(0.000,0.000,-90.000,-90.000) South Pole |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences |
spellingShingle |
Meteorology & Atmospheric Sciences Chen, G Davis, D Crawford, J Nowak, JB Eisele, F Mauldin, RL Tanner, D Buhr, M Shetter, R Lefer, B Arimoto, R Hogan, A Blake, D An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
topic_facet |
Meteorology & Atmospheric Sciences |
description |
Unexpected high levels of OH and NO were recorded at the South Pole (SP) Atmospheric Research Observatory during the 1998-99 ISCAT field study. Model simulations suggest a major photochemical linkage between observed OH and NO. A detailed comparison of the observations with model predictions revealed good agreement for OH at NO levels between 120 and 380 pptv. However, the model tended to overestimate OH for NO levels < 120 pptv, while it underestimated OH at levels > 380 pptv. The reasons for these deviations appear not to involve NO directly but rather HOx radical scavenging for the low NO conditions and additional HOx sources for the high NO conditions. Because of the elevated levels of NO and highly activated HOx photochemistry, the SP was found to be a strong net source of surface ozone. It is quite likely that the strong oxidizing environment found at the South Pole extends over the entire polar plateau. |
format |
Article in Journal/Newspaper |
author |
Chen, G Davis, D Crawford, J Nowak, JB Eisele, F Mauldin, RL Tanner, D Buhr, M Shetter, R Lefer, B Arimoto, R Hogan, A Blake, D |
author_facet |
Chen, G Davis, D Crawford, J Nowak, JB Eisele, F Mauldin, RL Tanner, D Buhr, M Shetter, R Lefer, B Arimoto, R Hogan, A Blake, D |
author_sort |
Chen, G |
title |
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
title_short |
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
title_full |
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
title_fullStr |
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
title_full_unstemmed |
An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations |
title_sort |
investigation of south pole hox chemistry: comparison of model results with iscat observations |
publisher |
eScholarship, University of California |
publishDate |
2001 |
url |
https://escholarship.org/uc/item/6xg4d739 |
op_coverage |
3633 - 3636 |
long_lat |
ENVELOPE(0.000,0.000,-90.000,-90.000) |
geographic |
Polar Plateau South Pole |
geographic_facet |
Polar Plateau South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Geophysical Research Letters, vol 28, iss 19 |
op_relation |
qt6xg4d739 https://escholarship.org/uc/item/6xg4d739 |
op_rights |
CC-BY |
_version_ |
1768375269214650368 |