FN Archimer Export Format
PT J
TI Spatiotemporal distributions of air-sea CO2 flux modulated by windseas in the Southern Indian Ocean
BT 
AF Sun, Huiying
   Zheng, Kaiwen
   Yu, Jing
   Zheng, Hao
AS 1:1;2:2;3:1,3;4:4,5;
FF 1:;2:;3:;4:;
C1 College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, China
   Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES), Physical Oceanography Laboratory, Ocean University of China, Qingdao, China
   Institute of Marine Development of Ocean University of China, Qingdao, China
   Key Laboratory of Marine Environment and Ecology, Institute of Coastal Environmental Pollution Control, College of Environmental Science and Engineering, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China
   Sanya Oceanographic Institution, Ocean University of China, Sanya, China
C2 UNIV OCEAN CHINA, CHINA
   UNIV OCEAN CHINA, CHINA
   UNIV OCEAN CHINA, CHINA
   UNIV OCEAN CHINA, CHINA
   UNIV OCEAN CHINA, CHINA
IN DOAJ
IF 3.7
TC 1
UR https://archimer.ifremer.fr/doc/00824/93612/100401.pdf
LA English
DT Article
CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
DE ;greenhouse gases;gas transfer velocity;surface wave breaking;air-sea CO2 flux;Southern Indian Ocean
AB The Southern Indian Ocean is a major reservoir for rapid carbon exchange with the atmosphere, plays a key role in the world’s carbon cycle. To understand the importance of anthropogenic CO2 uptake in the Southern Indian Ocean, a variety of methods have been used to quantify the magnitude of the CO2 flux between air and sea. The basic approach is based on the bulk formula—the air-sea CO2 flux is commonly calculated by the difference in the CO2 partial pressure between the ocean and the atmosphere, the gas transfer velocity, the surface wind speed, and the CO2 solubility in seawater. However, relying solely on wind speed to measure the gas transfer velocity at the sea surface increases the uncertainty of CO2 flux estimation. Recent studies have shown that the generation and breaking of ocean waves also significantly affect the gas transfer process at the air-sea interface. In this study, we highlight the impact of windseas on the process of air-sea CO2 exchange and address its important role in CO2 uptake in the Southern Indian Ocean. We run the WAVEWATCH III model to simulate surface waves in this region over the period from January 1st 2002 to December 31st 2021. Then, we use the spectral partitioning method to isolate windseas and swells from total wave fields. Finally, we calculate the CO2 flux based on the new semiempirical equation for gas transfer velocity considering only windseas. We found that after considering windseas’ impact, the seasonal mean zonal flux (mmol/m2·d) increased approximately 10%-20% compared with that calculated solely on wind speed in all seasons. Evolution of air-sea net carbon flux (PgC) increased around 5.87%-32.12% in the latest 5 years with the most significant seasonal improvement appeared in summer. Long-term trend analysis also indicated that the CO2 absorption capacity of the whole Southern Indian Ocean gradually increased during the past 20 years. These findings extend the understanding of the roles of the Southern Indian Ocean in the global carbon cycle and are useful for making management policies associated with marine environmental protection and global climatic change mitigation. 
PY 2023
PD MAR
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 10
UT 000949741400001
DI 10.3389/fmars.2023.1139591
ID 93612
ER

EF