Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment
The ITCT-Lagrangian-2K4 (Intercontinental Transport and Chemical Transformation) experiment was conceived with an aim to quantify the effects of photochemistry and mixing on the transformation of air masses in the free troposphere away from emissions. To this end, attempts were made to intercept and...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://research.manchester.ac.uk/en/publications/402e198d-681e-435d-864d-315a566d4de5 https://doi.org/10.1029/2006JD007540 |
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ftumanchesterpub:oai:pure.atira.dk:publications/402e198d-681e-435d-864d-315a566d4de5 2023-11-12T04:22:21+01:00 Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment Methven, J. Arnold, S. R. Stohl, Andreas Evans, M. J. Avery, M. Law, K. Lewis, A. C. Monks, P. S. Parrish, D. D. Reeves, C. E. Schlager, H. Atlas, Eliot L. Blake, D. R. Coe, H. Crosier, J. Flocke, Frank M. Holloway, John S. Hopkins, J. R. McQuaid, J. Purvis, R. Rappenglück, B. Singh, H. B. Watson, N. M. Whalley, L. K. Williams, P. I. 2006-12-16 https://research.manchester.ac.uk/en/publications/402e198d-681e-435d-864d-315a566d4de5 https://doi.org/10.1029/2006JD007540 eng eng info:eu-repo/semantics/closedAccess Methven , J , Arnold , S R , Stohl , A , Evans , M J , Avery , M , Law , K , Lewis , A C , Monks , P S , Parrish , D D , Reeves , C E , Schlager , H , Atlas , E L , Blake , D R , Coe , H , Crosier , J , Flocke , F M , Holloway , J S , Hopkins , J R , McQuaid , J , Purvis , R , Rappenglück , B , Singh , H B , Watson , N M , Whalley , L K & Williams , P I 2006 , ' Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment ' , Journal of Geophysical Research: Atmospheres , vol. 111 , no. 23 , D23S62 . https://doi.org/10.1029/2006JD007540 article 2006 ftumanchesterpub https://doi.org/10.1029/2006JD007540 2023-10-30T09:12:13Z The ITCT-Lagrangian-2K4 (Intercontinental Transport and Chemical Transformation) experiment was conceived with an aim to quantify the effects of photochemistry and mixing on the transformation of air masses in the free troposphere away from emissions. To this end, attempts were made to intercept and sample air masses several times during their journey across the North Atlantic using four aircraft based in New Hampshire (USA), Faial (Azores) and Creil (France). This article begins by describing forecasts from two Lagrangian models that were used to direct the aircraft into target air masses. A novel technique then identifies Lagrangian matches between flight segments. Two independent searches are conducted: for Lagrangian model matches and for pairs of whole air samples with matching hydrocarbon fingerprints. The information is filtered further by searching for matching hydrocarbon samples that are linked by matching trajectories. The quality of these "coincident matches" is assessed using temperature, humidity and tracer observations. The technique pulls out five clear Lagrangian cases covering a variety of situations and these are examined in detail. The matching trajectories and hydrocarbon fingerprints are shown, and the downwind minus upwind differences in tracers are discussed. Copyright 2006 by the American Geophysical Union. Article in Journal/Newspaper North Atlantic The University of Manchester: Research Explorer Journal of Geophysical Research: Atmospheres 111 D23 |
institution |
Open Polar |
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The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
The ITCT-Lagrangian-2K4 (Intercontinental Transport and Chemical Transformation) experiment was conceived with an aim to quantify the effects of photochemistry and mixing on the transformation of air masses in the free troposphere away from emissions. To this end, attempts were made to intercept and sample air masses several times during their journey across the North Atlantic using four aircraft based in New Hampshire (USA), Faial (Azores) and Creil (France). This article begins by describing forecasts from two Lagrangian models that were used to direct the aircraft into target air masses. A novel technique then identifies Lagrangian matches between flight segments. Two independent searches are conducted: for Lagrangian model matches and for pairs of whole air samples with matching hydrocarbon fingerprints. The information is filtered further by searching for matching hydrocarbon samples that are linked by matching trajectories. The quality of these "coincident matches" is assessed using temperature, humidity and tracer observations. The technique pulls out five clear Lagrangian cases covering a variety of situations and these are examined in detail. The matching trajectories and hydrocarbon fingerprints are shown, and the downwind minus upwind differences in tracers are discussed. Copyright 2006 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Methven, J. Arnold, S. R. Stohl, Andreas Evans, M. J. Avery, M. Law, K. Lewis, A. C. Monks, P. S. Parrish, D. D. Reeves, C. E. Schlager, H. Atlas, Eliot L. Blake, D. R. Coe, H. Crosier, J. Flocke, Frank M. Holloway, John S. Hopkins, J. R. McQuaid, J. Purvis, R. Rappenglück, B. Singh, H. B. Watson, N. M. Whalley, L. K. Williams, P. I. |
spellingShingle |
Methven, J. Arnold, S. R. Stohl, Andreas Evans, M. J. Avery, M. Law, K. Lewis, A. C. Monks, P. S. Parrish, D. D. Reeves, C. E. Schlager, H. Atlas, Eliot L. Blake, D. R. Coe, H. Crosier, J. Flocke, Frank M. Holloway, John S. Hopkins, J. R. McQuaid, J. Purvis, R. Rappenglück, B. Singh, H. B. Watson, N. M. Whalley, L. K. Williams, P. I. Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
author_facet |
Methven, J. Arnold, S. R. Stohl, Andreas Evans, M. J. Avery, M. Law, K. Lewis, A. C. Monks, P. S. Parrish, D. D. Reeves, C. E. Schlager, H. Atlas, Eliot L. Blake, D. R. Coe, H. Crosier, J. Flocke, Frank M. Holloway, John S. Hopkins, J. R. McQuaid, J. Purvis, R. Rappenglück, B. Singh, H. B. Watson, N. M. Whalley, L. K. Williams, P. I. |
author_sort |
Methven, J. |
title |
Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
title_short |
Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
title_full |
Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
title_fullStr |
Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
title_full_unstemmed |
Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment |
title_sort |
establishing lagrangian connections between observations within air masses crossing the atlantic during the international consortium for atmospheric research on transport and transformation experiment |
publishDate |
2006 |
url |
https://research.manchester.ac.uk/en/publications/402e198d-681e-435d-864d-315a566d4de5 https://doi.org/10.1029/2006JD007540 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Methven , J , Arnold , S R , Stohl , A , Evans , M J , Avery , M , Law , K , Lewis , A C , Monks , P S , Parrish , D D , Reeves , C E , Schlager , H , Atlas , E L , Blake , D R , Coe , H , Crosier , J , Flocke , F M , Holloway , J S , Hopkins , J R , McQuaid , J , Purvis , R , Rappenglück , B , Singh , H B , Watson , N M , Whalley , L K & Williams , P I 2006 , ' Establishing Lagrangian connections between observations within air masses crossing the Atlantic during the International Consortium for Atmospheric Research on Transport and Transformation experiment ' , Journal of Geophysical Research: Atmospheres , vol. 111 , no. 23 , D23S62 . https://doi.org/10.1029/2006JD007540 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2006JD007540 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
111 |
container_issue |
D23 |
_version_ |
1782337420929269760 |