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

Abstract

1Yangtze River is the longest river in China, nearly one-third of the national population lives 2 along the River. Air quality over the Yangtze River is interesting as it may have significant 3 influences on aquatic ecosystem, public health onboard and coastal areas.

Chemical Characteristics and Brown Carbon Chromophores of Atmospheric Organic Aerosols Over the Yangtze River Channel: A Cruise Campaign

“…We note that the sampling duration for the 1201M, 1201A, and 1201N samples corresponds to episode #5 in an overview paper of the cruise campaign (Li et al, 2018), whereas that for the 1202M and 1202N samples overlaps episode #6, and the 1203A sample coincides with episode #7. Based on the concentrations of carbon monoxide, and trace elements and levoglucosan in particulate matters, episode #5 and episodes #6–7 are cases strongly influenced by coal combustion and biomass burning, respectively (Li et al, 2018). The larger numbers and higher abundances of sulfur‐containing compounds in the 1201M and 1201A samples (Figure 2 and Table 1) are probably caused by coal combustion, which is in agreement with Li et al (2018).…”

“…Li et al (2018) classified the air pollution during the cruise campaign into eight distinct episodes based on sampling locations, backward trajectories, and photochemical processes. We note that the sampling duration for the 1201M, 1201A, and 1201N samples corresponds to episode #5 in an overview paper of the cruise campaign (Li et al, 2018), whereas that for the 1202M and 1202N samples overlaps episode #6, and the 1203A sample coincides with episode #7.…”

“…Li et al (2018) classified the air pollution during the cruise campaign into eight distinct episodes based on sampling locations, backward trajectories, and photochemical processes. We note that the sampling duration for the 1201M, 1201A, and 1201N samples corresponds to episode #5 in an overview paper of the cruise campaign (Li et al, 2018), whereas that for the 1202M and 1202N samples overlaps episode #6, and the 1203A sample coincides with episode #7. Based on the concentrations of carbon monoxide, and trace elements and levoglucosan in particulate matters, episode #5 and episodes #6–7 are cases strongly influenced by coal combustion and biomass burning, respectively (Li et al, 2018).…”

“…Atmospheric aerosol samples were collected onto 90‐mm prebaked quartz‐fiber filters (Whatman Company, UK) using a middle‐flow aerosol sampler (Qingdao Hengyuan Tech Co., Ltd., HY‐100) for 6 h at a flow rate of 100 L min −1 , from 22 November to 5 December 2015 along the Yangtze River channel between Shanghai and Wuhan (Figure 1). Details about the YRC can be found in a previous study (Li et al, 2018). In order to avoid the possible contaminations from self‐emission of the ship, the sampler was placed on the bow of the research vessel.…”

“…The Yangtze River is the longest river in China and passes by several highly developed economic megacities with major petrochemical complexes and/or steel industries (Li et al, 2018), leading to high emissions of anthropogenic pollutants including particulate matters, VOCs, sulfur dioxide, and nitrogen oxides (Huang et al, 2011). Meanwhile, the Yangtze River also plays an important role in shipping of goods and leisure cruising.…”