Recent increase in summer surface fCO2 in the western subtropical North Pacific

Title
Recent increase in summer surface fCO2 in the western subtropical North Pacific
Author(s)
박근하; 김동선; 최유정; 김태욱
KIOST Author(s)
Kim, Dongseon(김동선)
Publication Year
2017-08-21
Abstract
We observed unusually high levels (> 440 μatm) of carbon dioxide fugacity (fCO2) in surface seawater in the western subtropical North Pacific,the area where Subtropical Mode Water is formed, during summer 2015. The NOAA Kuroshio Extension Observatory moored buoy located in this region also measured high CO2 values, up to 500 μatm during this period. These high sea surface fCO2 (fCO2SW) values are explained by much higher normalized total dissolved inorganic carbon and slightly higher normalized total alkalinity concentrations in this region compared to the equatorial Pacific. Moreover, these values are much higher than the climatological CO2 values, even considering increasing atmospheric CO2,indicating a recent large increase in sea surface CO2 concentrations. A large seasonal change in sea surface temperature contributed to higher surface fCO2SW in the summer of 2015.Observatory moored buoy located in this region also measured high CO2 values, up to 500 μatm during this period. These high sea surface fCO2 (fCO2SW) values are explained by much higher normalized total dissolved inorganic carbon and slightly higher normalized total alkalinity concentrations in this region compared to the equatorial Pacific. Moreover, these values are much higher than the climatological CO2 values, even considering increasing atmospheric CO2,indicating a recent large increase in sea surface CO2 concentrations. A large seasonal change in sea surface temperature contributed to higher surface fCO2SW in the summer of 2015.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23869
Bibliographic Citation
10th International Carbon Dioxide Conference, 2017
Publisher
Oeschger Centre for Climate Change Research
Type
Conference
Language
English
Publisher
Oeschger Centre for Climate Change Research
Related Researcher
Research Interests

Biogeochemistry,Carbon cycle,Ocean acidification,생지화학,탄소순환,해양산성화

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