Conterminous U.S. Air Stagnation Index, Number of Days, 2007–2016
Dates
Publication Date
2020-09-01
Start Date
2006-01-01
End Date
2017-12-31
Citation
Stengel, V.G., Humberson, D.G., and Gallegos, T.J., 2020, Conterminous U.S. Air Stagnation Index, Number of Days, 2007–2016: U.S. Geological Survey data release, https://doi.org/10.5066/P9CUE6IQ.
Summary
Using the National Oceanic Atmospheric Administration’s (NOAA) Air Stagnation Index (ASI), the total number of days during 2007–2016 with atmospheric conditions conducive for stagnant air conditions in the conterminous U.S. are documented in raster format geospatial data. These data provide the number of days that would allow the temporal buildup of atmospheric pollution (NOAA, 2017). NOAA provides ASI data on a monthly basis based on a modified version of Wang and Angell’s (1999) algorithm. The air stagnation index criteria are defined as sea level geostrophic wind less than 8m/sec (meters per second) (if there is a temperature inversion below 850mb (millibars), then less than 10 m/sec), 500 mb wind less than 13m/sec, and no precipitation. [...]
Summary
Using the National Oceanic Atmospheric Administration’s (NOAA) Air Stagnation Index (ASI), the total number of days during 2007–2016 with atmospheric conditions conducive for stagnant air conditions in the conterminous U.S. are documented in raster format geospatial data. These data provide the number of days that would allow the temporal buildup of atmospheric pollution (NOAA, 2017). NOAA provides ASI data on a monthly basis based on a modified version of Wang and Angell’s (1999) algorithm. The air stagnation index criteria are defined as sea level geostrophic wind less than 8m/sec (meters per second) (if there is a temperature inversion below 850mb (millibars), then less than 10 m/sec), 500 mb wind less than 13m/sec, and no precipitation. These criteria are evaluated at a spatial resolution of 0.25 x 0.25 degrees. The original NOAA ASI can be downloaded from the NOAA (https://www.ncdc.noaa.gov/societal-impacts/air-stagnation/).
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AirstagND2007_2016.xml Original FGDC Metadata
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AirstagND2007_2016.zip
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Related External Resources
Type: Citation
National Oceanic and Atmospheric Administration, (2017) Air Stagnation Index: National Centers for Environmental Information web page, accessed October 06, 2017, at https://www.ncdc.noaa.gov/societal-impacts/air-stagnation/overview. Wang, J.X.L., and Angell, J.K., 1999, Air Stagnation Climatology for the United States (1948–1998): NOAA/Air Resources Laboratory ATLAS, v. 1, 74 p.
To provide a decadal summary of monthly NOAA air stagnation index data to help identify where temporal buildup of atmospheric pollution is more likely to occur.
