ISSN 1006-9895

CN 11-1768/O4

Effects of Nitrogen Oxides Produced from Lightning on the Formation of the Ozone Valley over the Tibetan Plateau
Author:
Affiliation:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
    Abstract:

    In order to further study possible influences of the photocatalytic reaction on the formation of O3 and O3 valley in the summer over the Tibetan Plateau, NO2 VCD, O3 total column and O3 profiles from OMI and OTD (Optics Transient Detection)/LIS (Lightning Imaging Sensor) total lightning data are used to investigate the spatial and temporal distributions characteristics of TOC and NO2 VCD, the correlation between lightning and NO2 VCD, the vertical distribution of O3 and its relationship with LNOx in the Tibetan Plateau and the Yangtze River Delta. Results in the two regions, which are located at the similar latitudes, are compared and analyzed. It is found that the O3 valley over the Tibetan Plateau mainly appears in the summer and autumn, and its TOC value is about 10-15 DU (Dobson unit) lower than that over the Yangtze River Delta. The NO2 VCD over the Tibetan Plateau is relatively small, and exhibits a temporal distribution characteristic of low in the summer and high in the winter. The total concentration of O3 in the Tibetan Plateau generally decreases in the summer due to the effect of the South Asia high. However, due to the influence of strong thunderstorms, the concentration of LNOx in the upper troposphere increases and can be transported to the top of the troposphere by strong ascending flows, which subsequently increases the concentration of O3 by photochemical reaction. Thereby, the O3 concentration difference between the Tibetan Plateau and the same latitude region is reduced and the decrease of the total O3 concentration slows down, which inhibits further deepening of the O3 valley in the Tibetan Plateau in the summer.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:October 24,2017
  • Revised:
  • Adopted:
  • Online: March 19,2019
  • Published: