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Boundary Layer Ozone Across the Indian Subcontinent: Who Influences Whom?
Author(s) -
David Liji M.,
Ravishankara A. R.
Publication year - 2019
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 - 10.1029/2019gl082416
Subject(s) - indian subcontinent , sri lanka , geography , boundary (topology) , south asia , pollution , climatology , geology , ancient history , ecology , biology , mathematics , mathematical analysis , history
Boundary layer ozone (BLO 3 ) over the Indian subcontinent (IS) can be region‐specific with consequences to health and pollution management strategies. The Goddard Earth Observing System‐Chemistry (GEOS‐Chem) model was used to estimate the contributions of eight IS regions on each other for BLO 3 . BLO 3 in northern India, Pakistan, and Sri Lanka is mostly (~65‐70%) influenced by regions outside the subcontinent. Roughly 30% of BLO 3 over eastern India is from within the IS, mostly from the Indo‐Gangetic Plain and central India (CI). Southern India is influenced by CI; however, it hardly influences other regions. Northern India and Sri Lanka regions are essentially isolated from other regions in the IS. The meteorology is the primary factor in the redistribution of BLO 3 and its precursors. Our results highlight the emerging importance of CI to O 3 pollution in addition to the Indo‐Gangetic Plain and shed light on potential strategies for O 3 control in the IS.