Roles of temperature and ventilation in oxygen consumption: A chemical kinetics view from the van't Hoff-based formulation

Peng Huang; Mingang Cai; Fajin Chen; Zhiqing Liu; Hongwei Ke; Weimin Wang; Xuehong Zheng; Chunhui Wang

doi:10.1016/j.marenvres.2023.106278

Roles of temperature and ventilation in oxygen consumption: A chemical kinetics view from the van't Hoff-based formulation

Mar Environ Res. 2024 Jan:193:106278. doi: 10.1016/j.marenvres.2023.106278. Epub 2023 Nov 22.

Authors

Peng Huang¹, Mingang Cai², Fajin Chen¹, Zhiqing Liu³, Hongwei Ke⁴, Weimin Wang⁵, Xuehong Zheng⁴, Chunhui Wang⁴

Affiliations

¹ College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, 524088, China; Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, 524088, China.
² College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, 524088, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China; Xiamen Ocean Vocational College, Xiamen, 361100, China. Electronic address: mgcai@xmu.edu.cn.
³ College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, 524088, China.
⁴ College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
⁵ School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China; Zhejiang Institute of Tianjin University, Ningbo, 315000, China.

PMID: 38008015
DOI: 10.1016/j.marenvres.2023.106278

Abstract

In this study, we successfully estimated the apparent activation energy of a microbially driven oxygen-consuming reaction (microbial-driven) based on tracer data. The concept of the apparent chemical reaction rate constant was employed to estimate various thermodynamic parameters associated with the oxygen consumption rate in conjunction with Arrhenius/Eyring equations. Normal Ea values of 80-90 kJ mol^-1 were found in the upper layers of the South China Sea and Sulu Sea, while higher Ea values (300-1000 kJ mol^-1) were observed in the rapidly ventilated Mediterranean Sea, the Sea of Japan, and the Bering Sea with lower temperatures. We classified the characteristics of typical sea basins into four categories. The temperature-dependent oxygen consumption rate relationship in each marine region was systematically calculated to derive the respective thermodynamic characteristic values. This allowed us to parameterize the rate-temperature relationship into thermodynamic quantities, enabling more effective integration of distinct basin characteristics within different sea areas into the marine biochemical model. Parameterization facilitates relatively accurate prediction of changes such as temperature, oxygen consumption rate.

Keywords: Kinetics; Oxygen consumption rate; Reaction constant; Temperature; Transient tracer.

MeSH terms

Kinetics
Mediterranean Sea
Oxygen Consumption*
Respiration*
Temperature
Thermodynamics