Using satellite observed formaldehyde (HCHO) and nitrogen dioxide (NO2) as an indicator of ozone sensitivity in a SIP

Jin, Xiaomeng; Fiore, Arlene M.; Geigert, Michael

Although State Implementation Plans (SIPs) typically rely on observations from ground-based networks and regulatory models, satellite data is increasingly available to state agencies and can also inform and supplement state implementation plans to improve air quality. An advantage of satellite data is that it provides information for a broader area than sampled by ground-based networks. This document provides examples and guidance for using satellite products of formaldehyde (HCHO) and nitrogen dioxide (NO2) to inform ground-level ozone sensitivity to emissions of nitrogen oxides (NOx) versus volatile organic compounds (VOC) in state implementation plans. Analysis of changes in ozone sensitivity over periods where emission controls have been implemented can provide insights into the efficacy of those past strategies and the likely efficacy of proposed future emission control programs.


  • thumnail for HAQAST_SIP_TT_CT_Technical_Guidance_Ozone_Sensitivity_Indicator_201806_with_doi.pdf HAQAST_SIP_TT_CT_Technical_Guidance_Ozone_Sensitivity_Indicator_201806_with_doi.pdf application/pdf 2.39 MB Download File


Access processing tools that accompany this technical guidance document at This document was produced by the NASA HAQAST Tiger Team "Supporting the Use of Satellite Data in State Implementation Plans (SIPs)" led by Professor Arlene Fiore. For additional resources see: