Distribution and influencing factors of atmospheric nitrogen oxides (NO) over the east coast of China in spring: Indication of the sea as a sink of the atmospheric NO.

Mar Pollut Bull

Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, PR China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, PR China.

Published: March 2024

An integrated observation of NO that included coastal cities and oceanic cruises covering the Qingdao coastal waters sites (QDCW) and the Yellow Sea and East China Sea sites (YECS) was conducted in spring. The average concentrations of the coastal cities, the QDCW, and the YECS were 5.4 ± 4.1, 4.2 ± 3.5, and 2.9 ± 6.8 ppb for NO while 18.5 ± 7.2, 9.4 ± 5.2, and 4.9 ± 6.4 ppb for NO, depicting lowest levels in the open seas. Atmospheric NO and NO showed similar spatial variations over the seas, the stations where the air masses originated from land or nearshore regions showed higher levels, but the decisive influencing factors were not the same in the different study areas. The calculated NO flux value in the YECS (-8.7 × 10 mol N cm) indicated that the sea surface was a net sink of atmospheric NO.

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Source
http://dx.doi.org/10.1016/j.marpolbul.2024.116095DOI Listing

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