A three-dimensional simulation of HOx concentrations over East Asia during TRACE-P

Meigen Zhang, Hajime Akimoto, Itsushi Uno

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The Models-3 Community Multi-scale Air Quality modeling system (CMAQ) coupled with the Regional Atmospheric Modeling System (RAMS) is used to simulate three-dimensional concentration distributions of hydroxyl (OH) and hydroperoxyl (HO2) radicals over the western Pacific Ocean during the NASA Transport and Chemical Evolution over the Pacific (TRACE-P) field campaign. Modeled values of OH and HO2 and their closely related chemical species and photolysis rates are compared with observational data collected onboard the DC-8 aircraft. Comparison shows that the model reasonably reproduced these observed values over a broad range of conditions with an overall tendency to overestimate the measured OH and HO2 by a factor of 1.56 and 1.24, respectively. A case study of OH, HO2 and their closely related chemical species and photolysis rates along the DC-8 flights 11 and 12 conducted on 17-18 March 2001 shows that the model reproduces the temporal and spatial variations reasonable well, and produces more reliable OH and HO2 concentrations in the polluted environment than in the clean marine boundary layer.

Original languageEnglish
Pages (from-to)233-254
Number of pages22
JournalJournal of Atmospheric Chemistry
Volume54
Issue number3
DOIs
Publication statusPublished - Jul 1 2006

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Hydroxyl Radical
photolysis
simulation
Photolysis
atmospheric modeling
air quality
aircraft
temporal variation
spatial variation
boundary layer
flight
Air quality
ocean
NASA
Boundary layers
modeling
Aircraft
chemical
Asia
rate

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Atmospheric Science

Cite this

A three-dimensional simulation of HOx concentrations over East Asia during TRACE-P. / Zhang, Meigen; Akimoto, Hajime; Uno, Itsushi.

In: Journal of Atmospheric Chemistry, Vol. 54, No. 3, 01.07.2006, p. 233-254.

Research output: Contribution to journalArticle

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