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Airborne Measurements of NOx, Tracer Species, and Small Particles during the European Lightning Nitrogen Oxides Experiment

Huntrieser, H. and Feigl, C. and Schlager, H. and Schröder, F. and Gerbig, Ch. and Velthoven, P. van and Flatoy, F. and Théry, C. and Petzold, A. and Höller, H. and Schumann, U. (2002) Airborne Measurements of NOx, Tracer Species, and Small Particles during the European Lightning Nitrogen Oxides Experiment. Journal of Geophysical Research, 107, ACH5-1-ACH5-24. DOI: 10.1029/2000JD000209

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Official URL: http://www.agu.org/journals/jd/

Abstract

Airborne in situ measurements of NO, NO2, NOy, CO, CO2, O3, J(NO2), and CN were performed in European thunderstorms during the field experiment EULINOX in July 1998. The measurements in the upper troposphere show enhanced NOx (= NO + NO2) concentrations within thunderstorms and their outflow at horizontal scales from 300 m to several 100 km. The maximum NO mixing ratio measured inside a thundercloud close to lightning (the aircraft was also hit by a small lightning strike) was 25 ppbv. A regional NOx enhancement of 0.5 ppbv over central Europe could be traced back to a thunderstorm event starting ∼24 hours earlier over Spain. The fractions of NOx in thunderclouds which are produced by lightning and convectively transported from the polluted boundary layer are determined by using CO2 and CO as tracers for boundary layer air. The analyses show that on average about 70% of the NOx increase measured in the anvil region was found to result from production by lightning and about 30% from NOx in the boundary layer. Thunderstorms are also strong sources of small particles. The peak CN concentrations measured within thunderstorm outflows (>30,000 particles STP cm<sup>-3</sup>) were distinctly higher than in the polluted boundary layer. The amount of NOx produced per thunderstorm and NO produced per lightning flash was estimated. The results imply that the annual mean NOx budget in the upper troposphere over Europe is dominated by aircraft emissions (0.1 TgN yr<sup>-1</sup>) in comparison to lightning production (∼0.03 TgN yr<sup>-1</sup>). On the global scale, NOx produced by lightning (mean 3 TgN yr<sup>-1</sup>) prevails over aircraft-produced NOx (0.6 TgN yr<sup>-1</sup>).

Item URL in elib:https://elib.dlr.de/9659/
Document Type:Article
Title:Airborne Measurements of NOx, Tracer Species, and Small Particles during the European Lightning Nitrogen Oxides Experiment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Huntrieser, H.UNSPECIFIEDUNSPECIFIED
Feigl, C.UNSPECIFIEDUNSPECIFIED
Schlager, H.UNSPECIFIEDUNSPECIFIED
Schröder, F.UNSPECIFIEDUNSPECIFIED
Gerbig, Ch.Harvard Univ., Cambridge, MA, USAUNSPECIFIED
Velthoven, P. vanKNMI, De Bilt, NLUNSPECIFIED
Flatoy, F.NILU, Kjeller, NUNSPECIFIED
Théry, C.ONERA, Chatillon, FUNSPECIFIED
Petzold, A.UNSPECIFIEDUNSPECIFIED
Höller, H.UNSPECIFIEDUNSPECIFIED
Schumann, U.UNSPECIFIEDUNSPECIFIED
Date:2002
Journal or Publication Title:Journal of Geophysical Research
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:107
DOI :10.1029/2000JD000209
Page Range:ACH5-1-ACH5-24
Status:Published
Keywords:nitrogen oxides, lightning, experiment, EULINOX
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: Löb, Ute
Deposited On:26 Apr 2007
Last Modified:31 Jul 2019 19:14

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