Characteristics of Atmosphere-Ocean CO2 Exchange due to Typhoon Activities over the East Asian Region

Monday, 15 December 2014
Gil Lee1, Chun-Ho Cho2, Dong-Hui Lim2, MinAh Sun2, Johan Lee2, Young-Hwa Byun2 and JongHo Lee2, (1)National Institute of Meteorological Research, Seogwipo-si, South Korea, (2)National Institute of Meteorological Research, Forecast Research Lab., Seogwipo-si, South Korea
Although the oceans are generally known as a net carbon sink in global sense, it is expected that CO₂release from oceans can occur locally depending on specific weather.
This study addresses investigation of change in CO2 exchange between atmosphere and ocean due to typhoon activities, using “Carbon Tracker-Asia (CTA)”. The CTA has constructed and managed at National Institute of Meteorological Research(NIMR) based on Carbon Tracker developed by NOAA. In order to examine effect of typhoon on change in air-sea CO2 exchange, we selected several cases which typhoon approached to Korean peninsula in the summertime and their tracks are similar to each other. Also, we analyzed difference between CO2 flux along typhoon tracks and other adjacent region not to be directly affected by typhoon in these cases.
There is a difference in ocean fluxes around 15 gC/m²yr over strong typhoon areas compared to other areas. This difference varied with the wind speeds, the correlation coefficient between the ocean and the wind flux was found 0.7. Changes in carbon flux to affect the concentration of CO₂ in the atmosphere near surface instantly.