Junge relationships in measurement data for cyclic siloxanes in air
2013 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 93, no 5, 830-834 p.Article in journal (Refereed) Published
In 1974, Junge postulated a relationship between variability of concentrations of gases in air at remote locations and their atmospheric residence time, and this Junge relationship has subsequently been observed empirically for a range of trace gases. Here, we analyze two previously-published datasets of concentrations of cyclic volatile methyl siloxanes (cVMS) in air and find Junge relationships in both. The first dataset is a time series of concentrations of decamethylcyclopentasiloxane (D-5) measured between January and June, 2009 at a rural site in southern Sweden that shows a Junge relationship in the temporal variability of the measurements. The second dataset consists of measurements of hexamethylcyclotrisiloxane (D-3), octamethylcyclotetrasiloxane (D-4) and D-5 made simultaneously at 12 sites in the Global Atmospheric Passive Sampling (GAPS) network that shows a Junge relationship in the spatial variability of the three cVMS congeners. We use the Junge relationship for the GAPS dataset to estimate atmospheric lifetimes of dodecamethylcyclohexasiloxane (D-6), 8:2-fluorotelomer alcohol and trichlorinated biphenyls that are within a factor of 3 of estimates based on degradation rate constants for reaction with hydroxyl radical determined in laboratory studies.
Place, publisher, year, edition, pages
2013. Vol. 93, no 5, 830-834 p.
D-3, D-4, D-5, D-6, FTOH, Lifetime
Environmental Sciences Ecology
IdentifiersURN: urn:nbn:se:su:diva-96104DOI: 10.1016/j.chemosphere.2012.10.055ISI: 000325594700016OAI: oai:DiVA.org:su-96104DiVA: diva2:664060
Swedish Research Council VR B0392101 2013-11-132013-11-112013-11-13Bibliographically approved