Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes
Observations (0-8 km) from the Tropospheric Ozone Production about the Spring Equinox (TOPSE) experiment are analyzed to examine air masses contributing to the observed variability of springtime O3 and its seasonal increase at 40°-85°N over North America. Factor analysis using the positive matrix fa...
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2003
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ftcdlib:oai:escholarship.org:ark:/13030/qt5vb2136r 2023-08-27T04:08:18+02:00 Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes Wang, Yuhang Shim, Changsub Blake, Nicola Blake, Donald Choi, Yunsoo Ridley, Brian Dibb, Jack Wimmers, Anthony Moody, Jennie Flocke, Frank Weinheimer, Andrew Talbot, Robert Atlas, Elliot 2003-11-16 application/pdf https://escholarship.org/uc/item/5vb2136r unknown eScholarship, University of California qt5vb2136r https://escholarship.org/uc/item/5vb2136r CC-BY Journal of Geophysical Research, vol 108, iss D21 Climate Action TOPSE springtime tropospheric ozone stratospheric ozone source Meteorology & Atmospheric Sciences article 2003 ftcdlib 2023-08-07T18:05:18Z Observations (0-8 km) from the Tropospheric Ozone Production about the Spring Equinox (TOPSE) experiment are analyzed to examine air masses contributing to the observed variability of springtime O3 and its seasonal increase at 40°-85°N over North America. Factor analysis using the positive matrix factorization and principal component analysis methods is applied to the data set with 14 chemical tracers (O3, NOy, PAN, CO, CH4, C2H2, C3H8, CH3Cl, CH3Br, C2Cl4, CFC-11, HCFC-141B, Halon-1211, and 7Be) and one dynamic tracer (potential temperature). Our analysis results are biased by the measurements at 5-8 km (70% of the data) due to the availability of 7Be measurements. The identified tracer characteristics for seven factors are generally consistent with the geographical origins derived from their 10 day back trajectories. Stratospherically influenced air accounts for 14 ppbv (35-40%) of the observed O3 variability for data with O3 concentrations <100 ppbv at middle and high latitudes. It accounts for about 2.5 ppbv/month (40%) of the seasonal O3 trend at midlatitudes but for only 0.8 ppbv/month (<20%) at high latitudes, likely reflecting more vigorous midlatitude dynamical systems in spring. At midlatitudes, reactive nitrogen-rich air masses transported through Asia are much more significant (11 ppbv in variability and 3.5 ppbv/month in trend) than other tropospheric contributors. At high latitudes the O3 variability is significantly influenced by air masses transported from lower latitudes (11 ppbv), which are poor in reactive nitrogen. The O3 trend, in contrast, is largely defined by air masses rich in reactive nitrogen transported through Asia and Europe across the Pacific or the Arctic (3 ppbv/month). The influence from the stratospheric source is more apparent at 6-8 km, while the effect Of O3 production and transport within the troposphere is more apparent at lower altitudes. The overall effect of tropospheric photochemical production, through long-range transport, on the observed O3 variability and its ... Article in Journal/Newspaper Arctic Tropospheric Ozone Production About the Spring Equinox University of California: eScholarship Arctic Pacific |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action TOPSE springtime tropospheric ozone stratospheric ozone source Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action TOPSE springtime tropospheric ozone stratospheric ozone source Meteorology & Atmospheric Sciences Wang, Yuhang Shim, Changsub Blake, Nicola Blake, Donald Choi, Yunsoo Ridley, Brian Dibb, Jack Wimmers, Anthony Moody, Jennie Flocke, Frank Weinheimer, Andrew Talbot, Robert Atlas, Elliot Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
topic_facet |
Climate Action TOPSE springtime tropospheric ozone stratospheric ozone source Meteorology & Atmospheric Sciences |
description |
Observations (0-8 km) from the Tropospheric Ozone Production about the Spring Equinox (TOPSE) experiment are analyzed to examine air masses contributing to the observed variability of springtime O3 and its seasonal increase at 40°-85°N over North America. Factor analysis using the positive matrix factorization and principal component analysis methods is applied to the data set with 14 chemical tracers (O3, NOy, PAN, CO, CH4, C2H2, C3H8, CH3Cl, CH3Br, C2Cl4, CFC-11, HCFC-141B, Halon-1211, and 7Be) and one dynamic tracer (potential temperature). Our analysis results are biased by the measurements at 5-8 km (70% of the data) due to the availability of 7Be measurements. The identified tracer characteristics for seven factors are generally consistent with the geographical origins derived from their 10 day back trajectories. Stratospherically influenced air accounts for 14 ppbv (35-40%) of the observed O3 variability for data with O3 concentrations <100 ppbv at middle and high latitudes. It accounts for about 2.5 ppbv/month (40%) of the seasonal O3 trend at midlatitudes but for only 0.8 ppbv/month (<20%) at high latitudes, likely reflecting more vigorous midlatitude dynamical systems in spring. At midlatitudes, reactive nitrogen-rich air masses transported through Asia are much more significant (11 ppbv in variability and 3.5 ppbv/month in trend) than other tropospheric contributors. At high latitudes the O3 variability is significantly influenced by air masses transported from lower latitudes (11 ppbv), which are poor in reactive nitrogen. The O3 trend, in contrast, is largely defined by air masses rich in reactive nitrogen transported through Asia and Europe across the Pacific or the Arctic (3 ppbv/month). The influence from the stratospheric source is more apparent at 6-8 km, while the effect Of O3 production and transport within the troposphere is more apparent at lower altitudes. The overall effect of tropospheric photochemical production, through long-range transport, on the observed O3 variability and its ... |
format |
Article in Journal/Newspaper |
author |
Wang, Yuhang Shim, Changsub Blake, Nicola Blake, Donald Choi, Yunsoo Ridley, Brian Dibb, Jack Wimmers, Anthony Moody, Jennie Flocke, Frank Weinheimer, Andrew Talbot, Robert Atlas, Elliot |
author_facet |
Wang, Yuhang Shim, Changsub Blake, Nicola Blake, Donald Choi, Yunsoo Ridley, Brian Dibb, Jack Wimmers, Anthony Moody, Jennie Flocke, Frank Weinheimer, Andrew Talbot, Robert Atlas, Elliot |
author_sort |
Wang, Yuhang |
title |
Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
title_short |
Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
title_full |
Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
title_fullStr |
Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
title_full_unstemmed |
Intercontinental transport of pollution manifested in the variability and seasonal trend of springtime O3 at northern middle and high latitudes |
title_sort |
intercontinental transport of pollution manifested in the variability and seasonal trend of springtime o3 at northern middle and high latitudes |
publisher |
eScholarship, University of California |
publishDate |
2003 |
url |
https://escholarship.org/uc/item/5vb2136r |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Tropospheric Ozone Production About the Spring Equinox |
genre_facet |
Arctic Tropospheric Ozone Production About the Spring Equinox |
op_source |
Journal of Geophysical Research, vol 108, iss D21 |
op_relation |
qt5vb2136r https://escholarship.org/uc/item/5vb2136r |
op_rights |
CC-BY |
_version_ |
1775348992702414848 |