The paper describes a new experiment with a SF6 tracer to determine the mixing history of a small... more The paper describes a new experiment with a SF6 tracer to determine the mixing history of a small region of cloud-base air. In situ measurements of the SF6 are made to follow the region and simultaneous measurements of natural trace gases are used to determine the dilution of the tagged region as it is affected by the cloud. After describing
The information in this document has been funded wholly or in part by the United States Environme... more The information in this document has been funded wholly or in part by the United States Environmental Protection Agency. It has been subjected to the Agency's peer and administrative review, and has been approved for publication as an EPA document. Mention of trade names or ...
Air quality simulation models applied at various horizontal scales require different degrees of t... more Air quality simulation models applied at various horizontal scales require different degrees of treatment in the specification of the underlying surfaces. As we model neighborhood scales (~ 1 km horizontal grid spacing), the representation of urban morphological ...
" WUDAPT (World Urban Database and Access Portal Tools) is a project to facilitate the devel... more " WUDAPT (World Urban Database and Access Portal Tools) is a project to facilitate the development and utilization of advanced science-based modeling tools to collect globally distributed urban information for a myriad of model applications requiring specialized data on urban form and human activity (see Ching et al., 2014, Mills et al., 2015, and www.wudapt.org). Recognizing that the science in models is rapidly advancing and embodied with increasing sophistication, WUDAPT provides an innovative and adaptable data collection approach for requisite urban morphology and activity data in the short term and for future needs."
ABSTRACT Regional scale, Eurlerian framework air quality simulation models are currently being ev... more ABSTRACT Regional scale, Eurlerian framework air quality simulation models are currently being evaluated using pollutant and meteorological measurements from special surface networks and airborne platforms. An evaluation protocol for such models using this database has been developed and adopted by the National Acid Precipitation Assessment Program; it includes 'operational' and 'diagnostic' components. This paper focuses on the diagnostic evaluation of the Regional Acid Deposition Model (RADM), using aircraft measurements from the Acid Model Operational Diagnostic Evaluation Study (AcidMODES) program under sponsorship of the United States Environmental Protection Agency (USEPA). RADM's ability to resolve horizontal patterns and gradients as well as the vertical structure of primary and secondary acidic pollutant species in the mixed layer over the major source region for sulfur and nitrogen emissions is an essential diagnostic test and is demonstrated. The potential roles of remote sensing in the evaluation of regional models are suggested.
The paper describes a new experiment with a SF6 tracer to determine the mixing history of a small... more The paper describes a new experiment with a SF6 tracer to determine the mixing history of a small region of cloud-base air. In situ measurements of the SF6 are made to follow the region and simultaneous measurements of natural trace gases are used to determine the dilution of the tagged region as it is affected by the cloud. After describing
The information in this document has been funded wholly or in part by the United States Environme... more The information in this document has been funded wholly or in part by the United States Environmental Protection Agency. It has been subjected to the Agency's peer and administrative review, and has been approved for publication as an EPA document. Mention of trade names or ...
Air quality simulation models applied at various horizontal scales require different degrees of t... more Air quality simulation models applied at various horizontal scales require different degrees of treatment in the specification of the underlying surfaces. As we model neighborhood scales (~ 1 km horizontal grid spacing), the representation of urban morphological ...
" WUDAPT (World Urban Database and Access Portal Tools) is a project to facilitate the devel... more " WUDAPT (World Urban Database and Access Portal Tools) is a project to facilitate the development and utilization of advanced science-based modeling tools to collect globally distributed urban information for a myriad of model applications requiring specialized data on urban form and human activity (see Ching et al., 2014, Mills et al., 2015, and www.wudapt.org). Recognizing that the science in models is rapidly advancing and embodied with increasing sophistication, WUDAPT provides an innovative and adaptable data collection approach for requisite urban morphology and activity data in the short term and for future needs."
ABSTRACT Regional scale, Eurlerian framework air quality simulation models are currently being ev... more ABSTRACT Regional scale, Eurlerian framework air quality simulation models are currently being evaluated using pollutant and meteorological measurements from special surface networks and airborne platforms. An evaluation protocol for such models using this database has been developed and adopted by the National Acid Precipitation Assessment Program; it includes 'operational' and 'diagnostic' components. This paper focuses on the diagnostic evaluation of the Regional Acid Deposition Model (RADM), using aircraft measurements from the Acid Model Operational Diagnostic Evaluation Study (AcidMODES) program under sponsorship of the United States Environmental Protection Agency (USEPA). RADM's ability to resolve horizontal patterns and gradients as well as the vertical structure of primary and secondary acidic pollutant species in the mixed layer over the major source region for sulfur and nitrogen emissions is an essential diagnostic test and is demonstrated. The potential roles of remote sensing in the evaluation of regional models are suggested.
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