ISSN 1006-9895

CN 11-1768/O4

The Interaction between Variations of South Asia High and Ozone in the Adjacent Regions
Author:
Affiliation:

Fund Project:

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

    The interaction between variations of South Asia High (SAH) and ozone in the adjacent regions during the summer half year (May-September) from 1979 to 2015 are studied by using ERA-Interim monthly data and the methods of correlation analysis and information flow. The results show that there are interactions between the SAH and ozone low in the region of SAH (hereinafter referred to as ozone low) during the summer half year except in July. The causal relations between the intensity of SAH and ozone low are interactive in June and September while the relationship becomes one-way causality in May and August. There may be an interaction between the enhancement (weakening) of ozone low and the enhancement (weakening) of SAH in the central and western edge of SAH and ozone low area in June, and in the northern SAH and the central area of ozone low in September. And the enhancement (weakening) of SAH may partly influence the enhancement (weakening) of ozone low in the southeastern SAH in June, in the western and eastern SAH in August and in the western SAH in September. In May, the enhancement (weakening) of ozone low may contribute to the enhancement (weakening) of SAH in the western SAH and the southern ozone low area. The possible mechanism of the impact of ozone low on SAH is investigated by correlation analysis, and the results are as follow. When positive ozone concentration anomalies occur in the region of SAH, there will have negative (positive) anomaly of radiation heating above (below) the region, which leads to abnormal convergence (divergence) in the higher (lower) levels and thus causes an abnormal descending motion. The anomaly of convergence in the higher levels and negative anomaly of vertical velocity lead to negative anomaly of SAH intensity. The process that involves in the formation of positive anomaly of SAH intensity induced by negative ozone anomaly is opposite to the process mentioned above.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:April 23,2017
  • Revised:
  • Adopted:
  • Online: March 29,2018
  • Published: