English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Biomass burning activities are ubiquitous in China, especially in northern China,where there is a large rural population and winter heatingcustom. Biomass burning tracers (i.e., levoglucosan, mannosan and potassium(K+)), as well as other chemical components, were quantified at a ruralsite (Gucheng, GC) in northern China from 15 October to 30 November, during atransition heating season, when the field burning of agricultural residuewas becoming intense. The measured daily average concentrations oflevoglucosan, mannosan and K+ in PM2.5 (particulatematter with aerodynamic diameters less than 2.5 µm) during this study were0.79 ± 0.75, 0.03 ± 0.03 and 1.52 ± 0.62 µg m−3, respectively. Carbonaceous components andbiomass burning tracers showed higher levels during nighttime than daytime,while secondary inorganic ions were enhanced during daytime. An episode withhigh levels of biomass burning tracers was encountered at the end ofOctober 2016, with high levoglucosan at 4.37 µg m−3. Based onthe comparison of chemical components during different biomass burningpollution periods, it appeared that biomass combustion can obviously elevatecarbonaceous component levels, whereas there was essentially no effect on secondaryinorganic aerosols in the ambient air. Moreover, the levoglucosan / mannosanratios during different biomass burning pollution periods remained at highvalues (in the range of 18.3–24.9); however, the levoglucosan / K+ratio was significantly elevated during the intensive biomass burningpollution period (1.67) when air temperatures were decreasing, which was substantiallyhigher than in other biomass burning periods (averaged at 0.47).

atmospheric chemistry and physics

Measurement report: Chemical characteristics of PM&amp;lt;sub&amp;gt;2.5&amp;lt;/sub&amp;gt; during typical biomass burning season at an agricultural site of the North China Plain