PMID- 31708977
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200928
IS  - 1680-7316 (Print)
IS  - 1680-7324 (Electronic)
IS  - 1680-7316 (Linking)
VI  - Volume 16
IP  - Iss 20
DP  - 2016 Oct 28
TI  - Analysis of the latitudinal variability of tropospheric ozone in the Arctic using 
      the large number of aircraft and ozonesonde observations in early summer 2008.
PG  - 13341-13358
LID - 10.5194/acp-16-13341-2016 [doi]
AB  - The goal of the paper are to: (1) present tropospheric ozone (O(3)) 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 O(3) 
      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 55 degrees N 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 O(3) 
      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 O(3), 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 (< 30%) of 
      O(3) and PV suggests that stratosphere-troposphere exchange (STE) is not the 
      major contribution to average tropospheric ozone at latitudes less than 70 degrees 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 O(3) versus PV correlation (> 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 O(3) photochemical production due to the BB emissions at 
      latitudes less than 65 degrees N, while STE contribution is more homogeneous in the 
      latitude range 55 degrees N to 70 degrees N. A positive ozone latitudinal gradient of 12 ppbv is 
      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 degrees N).
FAU - Ancellet, Gerard
AU  - Ancellet G
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Daskalakis, Nikos
AU  - Daskalakis N
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Raut, Jean Christophe
AU  - Raut JC
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Quennehen, Boris
AU  - Quennehen B
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Ravetta, Francois
AU  - Ravetta F
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Hair, Jonathan
AU  - Hair J
AD  - NASA Langley Reasearch Center, Hampton, VA, USA.
FAU - Tarasick, David
AU  - Tarasick D
AD  - Environment and Climate Change Canada, Downsview, ON, Canada.
FAU - Schlager, Hans
AU  - Schlager H
AD  - Institut fur Physik der Atmosphare, DLR, Oberpfaffenhofen, Germany.
FAU - Weinheimer, Andrew J
AU  - Weinheimer AJ
AD  - NCAR, Boulder, CO, USA.
FAU - Thompson, Anne M
AU  - Thompson AM
AD  - NASA/GSFC, Greenbelt, MD, USA.
FAU - Oltmans, Sam
AU  - Oltmans S
AD  - Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA.
FAU - Thomas, Jennie L
AU  - Thomas JL
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
FAU - Law, Katharine S
AU  - Law KS
AD  - LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universites, UVSQ, CNRS, Paris, France.
LA  - eng
GR  - Langley Research Center NASA/United States
GR  - N-999999/Intramural NASA/United States
PT  - Journal Article
PL  - Germany
TA  - Atmos Chem Phys
JT  - Atmospheric chemistry and physics
JID - 101214388
PMC - PMC6839714
MID - NIHMS948331
EDAT- 2016/10/28 00:00
MHDA- 2016/10/28 00:01
PMCR- 2019/11/08
CRDT- 2019/11/12 06:00
PHST- 2019/11/12 06:00 [entrez]
PHST- 2016/10/28 00:00 [pubmed]
PHST- 2016/10/28 00:01 [medline]
PHST- 2019/11/08 00:00 [pmc-release]
AID - 10.5194/acp-16-13341-2016 [doi]
PST - ppublish
SO  - Atmos Chem Phys. 2016 Oct 28;Volume 16(Iss 20):13341-13358. doi: 
      10.5194/acp-16-13341-2016.