Reduction in Near‐Surface Wind Speeds With Increasing CO2 May Worsen Winter Air Quality in the Indo‐Gangetic Plain

Paulot, Fabien; Naik, Vaishali; W. Horowitz, Larry

doi:10.1029/2022gl099039

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Reduction in Near‐Surface Wind Speeds With Increasing CO2 May Worsen Winter Air Quality in the Indo‐Gangetic Plain

2022
By Paulot, Fabien ; Naik, Vaishali ; W. Horowitz, Larry
Source: Geophysical Research Letters, 49(18)

[PDF-1.46 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Paulot, Fabien ; Naik, Vaishali ; W. Horowitz, Larry

Paulot, Fabien ; Naik, Vaishali ; W. Horowitz, Larry Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory)

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory) Less -
Description:

We analyze the relationship between fine particulate matter (PM2.5) and meteorology in winter in the Indo‐Gangetic Plain (IGP). We find that the concentration of PM2.5 exhibits similar increase with decreasing surface wind speed in 15 out of 18 cities considered. Using this observed relationship, we estimate that the reduction of surface wind speed with increasing CO2 simulated by models participating in the Coupled Model Intercomparison Project Phase 6 will result in higher average wintertime PM2.5 concentrations (1% per degree K of global warming) and more frequent high‐pollution events. This observation‐based estimate is qualitatively consistent with the simulated response of black carbon to global warming inferred from the AerChemMIP ssp370SST and ssp370pdSST experiments. We hypothesize that a reduction in the frequency and intensity of western disturbances with increasing CO2 may contribute to the reduction in the surface wind in the IGP.
Keywords:

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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 49(18)
DOI:

https://doi.org/10.1029/2022gl099039
ISSN:

0094-8276;1944-8007;
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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https://creativecommons.org/publicdomain/zero/1.0/
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CC0 Public Domain
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Main Document Checksum:

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urn:sha256:70d12d12705d45b79ec35ad9a9bb2192b237718947185cc894b1ded229cbb0bd
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https://repository.library.noaa.gov/view/noaa/59597/noaa_59597_DS1.pdf
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Reduction in Near‐Surface Wind Speeds With Increasing CO2 May Worsen Winter Air Quality in the Indo‐Gangetic Plain

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