An Overview of the Nighttime Aerosol/Oxidant Plume Experiment (NAOPEX)
Conference
·
OSTI ID:985608
The Nighttime Aerosol/Oxidant Plume Experiment was designed to characterize aerosols (number density, geographic distribution, physical characteristics) and trace gases coming from the greater Boston area at night between July 29 and August 8, 2002. Aircraft flights below 1500m MSL measured upwind/downwind characteristics of the urban plume and included Lagrangian measurements made in conjunction with tetroon releases within the plume. We focus here on just the upwind/downwind characeristics of the plume, with the Lagrangian results to be presented elsewhere. Statistically insignificant variations in aerosol number density, O3, and CO downwind of Boston were found under conditions of westerly flow, although large (50%) increases in downwind NOy were measured. Much bigger upwind/downwind differences were found in O3 and CO when sampling under light and variable wind conditions although the downwind NOy levels were much less (increase of only 15%), and were not associated with any measurable increase in the NOx relative to observations made under westerly flow. There was, in general, little evidence of the Boston plume at aircraft sampling heights, which suggests a greatly reduced potential for long range transport of the urban plume within the free troposphere over the Atlantic.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 985608
- Report Number(s):
- PNNL-SA-39299; KP1202010
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nighttime Lagrangian Measurements of Aerosols and Oxidants in the Boston Urban Plume: Possible Evidence of Heterogeneous Loss of Ozone
Ozone Production Efficiency and NOx Depletion in an Urban Plume: Interpretation of Field Observations and Implications for Evaluating O3-NOx-VOC Sensitivity
Growth of aerosol in an urban plume. [METROMEX program]
Conference
·
Mon Oct 04 00:00:00 EDT 2004
·
OSTI ID:963851
Ozone Production Efficiency and NOx Depletion in an Urban Plume: Interpretation of Field Observations and Implications for Evaluating O3-NOx-VOC Sensitivity
Journal Article
·
Thu Jul 31 00:00:00 EDT 2003
· Journal of Geophysical Research. D. (Atmospheres), 108(D14):4436
·
OSTI ID:15004574
Growth of aerosol in an urban plume. [METROMEX program]
Conference
·
Wed Dec 31 23:00:00 EST 1975
·
OSTI ID:7363293