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Interactive comment on “ Real refract v indices and volatility of secondary organic aerosol generated from photooxidation and ozonolysis of limonene , α-pinene and toluene ” by H
| Content Provider | Semantic Scholar |
|---|---|
| Author | Paulson, Suzanne E. |
| Copyright Year | 2013 |
| Abstract | Reviewer 1: My primary concern with this work is that I find it somewhat difficult to follow the connections that are (or are not) being made between reaction conditions, particle size, particle mass loading and particle composition and how all of these influence the derived RI values. If I am understanding correctly, the authors are arguing that composition plays a controlling role on determining the derived RI values. However, they do not provide any direct measurements of particle composition, instead seeming to use particle size as a proxy for chemical composition. Y t the particl size that results from a given experiment can depend on myriad factors and may only loosely be related to particle composition. By presenting their derived RI values vs. particle size, they seem to be leading the reader to think that there is a oneâĂŘtoâĂŘone correspondence between particle size and composition, even if they don’t explicitly make this claim. Although particle size may be related to composition, the relationship is most certainly not straightforward and highly subject to specific experimental conditions (including the amount of precursor VOC and the rate of oxidation). The authors do provide strong evidence for the optical properties of SOA being highly variable, but it is not clear to me that these results provide any particular elucidation of the controlling factors, at least not as presented. I would encourage the authors to look for ways they can present their data similar to how they did in Kim et al. (2012), where they showed derived RI vs. HC/NOx. I believe that this would allow for more direct connections to be made between particle composition and particle RI, even when no composition measurements have been directly made. That said, most of the results presented in the current work are extensions or repeats of previous experiments: it is really only the results from the thermodenuding experiments that are particularly new. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2772/2013/acpd-13-C2772-2013.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2769/2013/acpd-13-C2769-2013.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2752/2013/acpd-13-C2752-2013-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C681/2013/acpd-13-C681-2013-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2772/2013/acpd-13-C2772-2013-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2769/2013/acpd-13-C2769-2013-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C681/2013/acpd-13-C681-2013.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C862/2013/acpd-13-C862-2013-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/13/C2752/2013/acpd-13-C2752-2013.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
