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SONEX airborne mission and coordinated POLINAT‐2 activity: Overview and accomplishments
Author(s) -
Singh Hanwant B.,
Thompson Anne M.,
Schlager H.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900588
Subject(s) - context (archaeology) , environmental science , meteorology , stratosphere , troposphere , sampling (signal processing) , aeronautics , geology , geography , computer science , engineering , paleontology , filter (signal processing) , computer vision
The SASS (Subsonic Assessment) Ozone and NO x Experiment (SONEX) was an airborne field campaign conducted in October–November 1997 in the vicinity of the North Atlantic Flight Corridor to study the impact of aircraft emissions on NO x and ozone (O 3 ). A fully instrumented NASA DC‐8 aircraft was used as the primary SONEX platform. SONEX activities were closely coordinated with the European POLINAT‐2 (Pollution from Aircraft Emissions in the North Atlantic Flight Corridor) program, which used a Falcon‐20 aircraft. Both campaigns focused on the upper troposphere/“lowermost” stratosphere (UT/LS) as the region of greatest interest. Specific sampling goals were achieved with the aid of a state‐of‐the art modeling and meteorological support system, which allowed targeted sampling of air parcels with desired characteristics. A substantial impact of aircraft emissions on NO x , O 3 , and CN in the UT/LS of the study region is shown to be present. This mission provided direct support for the highly nonlinear nature of the NO x ‐O 3 chemistry. The results are being published in Special Sections of GRL and JGR. This overview provides a context within which these publications can be understood.