2015 Ozone Report.pdf

DE_Ozone_2015.pdf
Preview of 2015 Ozone Report
🔗 Source: documents.dnrec.delaware.gov
📊 Size: 1.08 MB
👤 Author: William F. Ryan
⬇️ Downloads: 45

Summary

The 2015 ozone season in Delaware was the third consecutive year with historically low ozone levels, with only 2 days reaching the Code Orange threshold and no Code Red or Code Purple days. A "step-down" in observed ozone began in 2013, likely due to reduced NOx emissions. The summer weather pattern limited heat waves and westerly transport, contributing to lower ozone levels. Forecast skill was comparable to 2013-2014, with a median absolute error of 6.0 ppbv, and showed improvement for Code Orange cases, with both days correctly forecasted. However, high temperature and persistence became unreliable forecast predictors. Numerical air quality models had poor skill for Code Orange cases and over-predicted peak ozone. A new Code Orange threshold of 71 ppb will be in place for 2016, expected to triple the number of ozone exceedance days in Delaware.

Description

The 2015 ozone season in Delaware was the third consecutive year with historically low ozone levels, with only 2 days reaching the Code Orange threshold and no...

Technical Information

  • File Format: PDF
  • File Size: 1.08 MB
  • Pages: 24
  • Language: EN
  • Author: William F. Ryan
  • Total Downloads: 45
  • Last Updated: 3 months ago

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