NDLI: Distribution and cycling of carbon monoxide in the east china sea and the marine atmosphere in autumn

Content Provider	Springer Nature Link
Author	He, Zhen Xu, Guanqiu Yang, Guipeng
Copyright Year	2015
Abstract	Carbon monoxide (CO) concentrations, sea-to-air fluxes and microbial consumption rate constants, along with atmospheric CO mixing ratios, were measured in the East China Sea (ECS) in autumn. Atmospheric CO mixing ratios varied from 96 to 256 ppbv, with an average of 146 ppbv (SD = 54 ppbv, n = 31). Overall, the atmospheric CO concentrations displayed a decreasing trend from inshore to offshore stations. The surface water CO concentrations in the investigated area ranged from 0.24 to 6.12 nmol L$^{−1}$, with an average of 1.68 nmol L$^{−1}$ (SD = 1.50 nmol L$^{−1}$, n = 31). The surface water CO concentrations were affected significantly by sunlight. Vertical profiles showed that CO concentrations declined rapidly with depth, with the maximum appearing in the surface water. The surface CO concentrations were oversaturated, with the saturation factors ranging from 1.4 to 56.9, suggesting that the ECS was a net source of atmospheric CO. The sea-to-air fluxes of CO in the ECS ranged from 0.06 to 11.31 µmol m$^{−2}$ d$^{−1}$, with an average of 2.90 µmol m$^{−2}$ d$^{−1}$ (SD = 2.95µmol m$^{−2}$ d$^{−1}$, n = 31). In the incubation experiments, CO concentrations decreased exponentially with incubation time and the processes conformed to the first order reaction characteristics. The microbial CO consumption rate constants in the surface water (K$_{CO}$) ranged from 0.063 to 0.22 h$^{−1}$, with an average of 0.12 h$^{−1}$ (SD = 0.062 h$^{−1}$, n = 6). A negative correlation between K$_{CO}$ and salinity was observed in the present study.
Starting Page	994
Ending Page	1002
Page Count	9
File Format	PDF
ISSN	16725182
Journal	Journal of Ocean University of China
Volume Number	14
Issue Number	6
e-ISSN	19935021
Language	English
Publisher	Science Press
Publisher Date	2015-11-07
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbon monoxide distribution sea-to-air flux microbial consumption East China Sea Oceanography Meteorology
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering

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