Continuous Chemiluminescence Measurements of Dissolved Nitric Oxide (NO) and Nitrogen Dioxide (NO 2 ) in the Ocean Surface Layer of the East China Sea.

Autor: Tian Y; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.; School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China., Wang KK; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China., Yang GP; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China., Li PF; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China., Liu CY; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China., Ingeniero RCO; GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel 24105, Germany., Bange HW; GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel 24105, Germany.
Jazyk: angličtina
Zdroj: Environmental science & technology [Environ Sci Technol] 2021 Mar 16; Vol. 55 (6), pp. 3668-3675. Date of Electronic Publication: 2021 Feb 23.
DOI: 10.1021/acs.est.0c06799
Abstrakt: Nitric oxide (NO) is a short-lived intermediate of the oceanic nitrogen cycle, and it is produced by biological and photochemical processes in the ocean. Nitrogen dioxide (NO 2 ) is a reactive atmospheric compound which has not been determined in the ocean so far. Here, we present the setup and validation of a novel continuous underway measurement system to measure dissolved NO and NO 2 in the surface ocean. The system consists of a seawater/gas equilibration component coupled to a chemiluminescence detector. It was successfully deployed during a 12 day cruise to the East China Sea in May 2018. Dissolved NO and NO 2 surface concentrations ranged from -12 mol L -1 and -12 mol L -1 , respectively. The ECS was supersaturated with NO but significantly undersaturated with NO 2 , indicating that the surface waters were a source for atmospheric NO but a sink for atmospheric NO 2 at the time of our measurements.
Databáze: MEDLINE