Review of the NARSTO Draft Report NARSTO Assessment of the Atmospheric Science on Particulate Matter (2002) / Chapter Skim
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2 Overarching Issues
2 Overarching Issues
Pages 11-16
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From page 11... ...
Figure 6.S in Chapter 6 shows another type of conceptual model, which is said to be useful for evaluating the effect of reducing sulfur in Canadian gasoline; it provides specific information linking sources and ambient concentrations. A third form of conceptual model is defined and presented in Chapter 10 for each of the regional case studies; the idea of a "conceptual description," which is defined as an incomplete conceptual model, is introduced here.
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From page 12... ...
that it includes generalized concepts of major factors involved in the generation and distribution of PM. NARSTO's second objective also calls for the model to "accommodate changing knowledge about atmospheric processes, emission sources, emission control technology, exposure, and human health and environmental impacts." Similarly, the fifth objective calls for the assessment to "provide a framework for atmospheric scientists which relates their work to standards, implementation and air quality management, and to health, exposure, and environmental impact research for standard setting." Thus, effectively connecting the conceptual mode} of airbornePM burden to the impacts and policy implications of increased PM requires placing the conceptual mode!
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From page 13... ...
The committee recommends that each technical chapter begin by positioning its subject matter in the framework for airborne-PM management. Likewise, the information on regionally specific processes could be presented using the same basic figure as the framework but with information in each box reflecting regional characteristics.
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From page 14... ...
The assessment, however, often lacks a clear discussion of how the material presented could be useful for informing PM policy decisions. The committee recommends that each technical chapter (Chapters 2-9)
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From page 15... ...
Furthermore, the potential need for more fine-scale PM2 s measurements is not noted. The committee recommends that discussion in the assessment reflect the heterogeneity in the composition and concentrations of PM2 s within a region, the potential effect of this heterogeneity on variability in exposure and health effects, and the possible need to obtain additional measurements to support health-effects research.
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From page 16... ...
The committee recommends that these problems be corrected. Using text boxes to highlight only research recommendations may give the reader the impression that the authors give more weight to these recommendations than to summarizing policy-relevant PM science.
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