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

. The Yangtze River isthe longest river in China; nearly one-third of the national population livesalong the river. Air quality over the Yangtze River is important as it mayhave significant influences on the aquatic ecosystem, the health of everyoneliving along the Yangtze River, and regional climate change. Chemicalcompositions of ambient aerosol were determined during a comprehensive cruisecampaign carried out along the mid–lower reaches of the Yangtze River (MLYR)in winter of 2015. The total average concentration of PM2.5 was 119.29±33.67 µg m−3, and the dominant ionic composition inPM2.5 was SO42- with an average concentration of 15.21±6.69 µg m−3, followed by NO3- (13.76±4.99 µg m−3), NH4+ (9.38±4.35 µg m−3), and Ca2+ (2.23±1.24 µg m−3) in this cruise. Based on the filter samples,the concentration and chemical composition of PM2.5 were remarkablyvaried or fluctuated from coastal areas to inland over the MLYR region.Crustal elements (Ca, Mg, Al, and K) from floating dust showed peakconcentrations in the Yangtze River Delta (YRD) region, while secondaryinorganic species (SO42-, NO3-, andNH4+) and some of the most enriched elements (Pb, As, Se, andCd) presented high levels in central China (Wuhan region). The significantcorrelation between Se and SO42- suggested that coal combustionmay play an important role in secondary inorganic aerosol formation. Therelatively high enrichment factors (EFs) of Ca (EFs &gt;100) suggested thecrustal elements may derive from anthropogenic sources. Furthermore, theconcentration of levoglucosan in PM2.5 and the CO column level fromsatellite observation were greatly enhanced in the rural areas (Anhui andJiangxi), indicating that biomass burning may make a remarkable contributionto rural areas. The concentrations of typical tracer for heavy oil (V and Ni)significantly increased in the Shanghai port, which was mainly ascribed toship emissions, based on the air mass source analysis and the relatively highratio of V ∕ Ni as well. The results shown herein portray a good pictureof air pollution along the Yangtze River.

Air quality in the middle and lower reaches of the Yangtze River channel: a cruise campaign