Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008
The goal of the paper are to: (1) present tropospheric ozone (O3) climatologies in summer 2008 based on a large amount of measurements, during the International Polar Year when the Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transp...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20170002662 2023-05-15T15:19:39+02:00 Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 Oltmans, Sam Raut, Jean Christophe Thompson, Anne M. Weinheimer, Andrew J. Quennehen, Boris Schlager, Hans Tarasick, David Thomas, Jennie L. Ancellet, Gerard Daskalakis, Nikos Ravetta, Francois Hair, Jonathan Law, Katharine S. Unclassified, Unlimited, Publicly available October 28, 2016 application/pdf http://hdl.handle.net/2060/20170002662 unknown Document ID: 20170002662 http://hdl.handle.net/2060/20170002662 Copyright, Public use permitted CASI Earth Resources and Remote Sensing Meteorology and Climatology GSFC-E-DAA-TN40712 Atmospheric Chemistry and Physics (ISSN 1680-7316) (e-ISSN 1680-7324); 16; 20; 13341-13358 2016 ftnasantrs 2019-07-20T23:37:20Z The goal of the paper are to: (1) present tropospheric ozone (O3) climatologies in summer 2008 based on a large amount of measurements, during the International Polar Year when the Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transport (POLARCAT) campaigns were conducted (2) investigate the processes that determine O3 concentrations in two different regions (Canada and Greenland) that were thoroughly studied using measurements from 3 aircraft and 7 ozonesonde stations. This paper provides an integrated analysis of these observations and the discussion of the latitudinal and vertical variability of tropospheric ozone north of 55oN during this period is performed using a regional model (WFR-Chem). Ozone, CO and potential vorticity (PV) distributions are extracted from the simulation at the measurement locations. The model is able to reproduce the O3 latitudinal and vertical variability but a negative O3 bias of 6-15 ppbv is found in the free troposphere over 4 km, especially over Canada. Ozone average concentrations are of the order of 65 ppbv at altitudes above 4 km both over Canada and Greenland, while they are less than 50 ppbv in the lower troposphere. The relative influence of stratosphere-troposphere exchange (STE) and of ozone production related to the local biomass burning (BB) emissions is discussed using differences between average values of O3, CO and PV for Southern and Northern Canada or Greenland and two vertical ranges in the troposphere: 0-4 km and 4-8 km. For Canada, the model CO distribution and the weak correlation (less than 30%) of O3 and PV suggests that stratosphere troposphere exchange (STE) is not the major contribution to average tropospheric ozone at latitudes less than 70 deg N, due to the fact that local biomass burning (BB) emissions were significant during the 2008 summer period. Conversely over Greenland, significant STE is found according to the better O3 versus PV correlation (greater than 40%) and the higher 75th PV percentile. A weak negative latitudinal summer ozone gradient -6 to -8 ppbv is found over Canada in the mid troposphere between 4 and 8 km. This is attributed to an efficient O3 photochemical production due to the BB emissions at latitudes less than 65 deg N, while STE contribution is more homogeneous in the latitude range 55 deg N to 70 deg N. A positive ozone latitudinal gradient of 12 ppbv is 1 observed in the same altitude range over Greenland not because of an increasing latitudinal influence of STE, but because of different long range transport from multiple mid-latitude sources (North America, Europe and even Asia for latitudes higher than 77 deg N). Other/Unknown Material Arctic Greenland International Polar Year NASA Technical Reports Server (NTRS) Arctic Canada Greenland |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing Meteorology and Climatology |
spellingShingle |
Earth Resources and Remote Sensing Meteorology and Climatology Oltmans, Sam Raut, Jean Christophe Thompson, Anne M. Weinheimer, Andrew J. Quennehen, Boris Schlager, Hans Tarasick, David Thomas, Jennie L. Ancellet, Gerard Daskalakis, Nikos Ravetta, Francois Hair, Jonathan Law, Katharine S. Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
topic_facet |
Earth Resources and Remote Sensing Meteorology and Climatology |
description |
The goal of the paper are to: (1) present tropospheric ozone (O3) climatologies in summer 2008 based on a large amount of measurements, during the International Polar Year when the Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transport (POLARCAT) campaigns were conducted (2) investigate the processes that determine O3 concentrations in two different regions (Canada and Greenland) that were thoroughly studied using measurements from 3 aircraft and 7 ozonesonde stations. This paper provides an integrated analysis of these observations and the discussion of the latitudinal and vertical variability of tropospheric ozone north of 55oN during this period is performed using a regional model (WFR-Chem). Ozone, CO and potential vorticity (PV) distributions are extracted from the simulation at the measurement locations. The model is able to reproduce the O3 latitudinal and vertical variability but a negative O3 bias of 6-15 ppbv is found in the free troposphere over 4 km, especially over Canada. Ozone average concentrations are of the order of 65 ppbv at altitudes above 4 km both over Canada and Greenland, while they are less than 50 ppbv in the lower troposphere. The relative influence of stratosphere-troposphere exchange (STE) and of ozone production related to the local biomass burning (BB) emissions is discussed using differences between average values of O3, CO and PV for Southern and Northern Canada or Greenland and two vertical ranges in the troposphere: 0-4 km and 4-8 km. For Canada, the model CO distribution and the weak correlation (less than 30%) of O3 and PV suggests that stratosphere troposphere exchange (STE) is not the major contribution to average tropospheric ozone at latitudes less than 70 deg N, due to the fact that local biomass burning (BB) emissions were significant during the 2008 summer period. Conversely over Greenland, significant STE is found according to the better O3 versus PV correlation (greater than 40%) and the higher 75th PV percentile. A weak negative latitudinal summer ozone gradient -6 to -8 ppbv is found over Canada in the mid troposphere between 4 and 8 km. This is attributed to an efficient O3 photochemical production due to the BB emissions at latitudes less than 65 deg N, while STE contribution is more homogeneous in the latitude range 55 deg N to 70 deg N. A positive ozone latitudinal gradient of 12 ppbv is 1 observed in the same altitude range over Greenland not because of an increasing latitudinal influence of STE, but because of different long range transport from multiple mid-latitude sources (North America, Europe and even Asia for latitudes higher than 77 deg N). |
format |
Other/Unknown Material |
author |
Oltmans, Sam Raut, Jean Christophe Thompson, Anne M. Weinheimer, Andrew J. Quennehen, Boris Schlager, Hans Tarasick, David Thomas, Jennie L. Ancellet, Gerard Daskalakis, Nikos Ravetta, Francois Hair, Jonathan Law, Katharine S. |
author_facet |
Oltmans, Sam Raut, Jean Christophe Thompson, Anne M. Weinheimer, Andrew J. Quennehen, Boris Schlager, Hans Tarasick, David Thomas, Jennie L. Ancellet, Gerard Daskalakis, Nikos Ravetta, Francois Hair, Jonathan Law, Katharine S. |
author_sort |
Oltmans, Sam |
title |
Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
title_short |
Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
title_full |
Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
title_fullStr |
Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
title_full_unstemmed |
Analysis of the Latitudinal Variability of Tropospheric Ozone in the Arctic Using the Large Number of Aircraft and Ozonesonde Observations in Early Summer 2008 |
title_sort |
analysis of the latitudinal variability of tropospheric ozone in the arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
publishDate |
2016 |
url |
http://hdl.handle.net/2060/20170002662 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic Canada Greenland |
geographic_facet |
Arctic Canada Greenland |
genre |
Arctic Greenland International Polar Year |
genre_facet |
Arctic Greenland International Polar Year |
op_source |
CASI |
op_relation |
Document ID: 20170002662 http://hdl.handle.net/2060/20170002662 |
op_rights |
Copyright, Public use permitted |
_version_ |
1766349854886330368 |