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Low frequency changes in CO2 concentration in East Asia related to Pacific decadal oscillation and Atlantic multi-decadal oscillation for mid-summer and early fall

Title
Low frequency changes in CO2 concentration in East Asia related to Pacific decadal oscillation and Atlantic multi-decadal oscillation for mid-summer and early fall
Author
박인홍
Keywords
CO2 concentration; Low-frequency variability; Sea surface temperatures; Terrestrial vegetation activity; Precipitation
Issue Date
2023-02-23
Publisher
ELSEVIER
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v. 876, Article NO 162377, Page. 1-11
Abstract
The climatological seasonal maximum and minimum CO2 concentrations in East Asia for 1987-2020 have been re-corded at April and August, respectively. We found that the CO2 concentration in East Asia during July, August, and September (JAS) is lower than normal before the late 1990s and after the early 2010s (Low_CO2 period), and higher than normal from the late 1990s to the early 2010s (High_CO2 period). The low-frequency variability of CO2 concen-tration in East Asia during JAS correlates with both Pacific Decadal Oscillation (PDO) and Atlantic Multi-decadal Os-cillation (AMO)-related sea surface temperatures (SSTs). We analyzed atmospheric and oceanic conditions during JAS between the two periods, finding that precipitation in East Asia decreased during JAS in High_CO2 period than that in Low_CO2 period, possibly due to PDO and AMO-related SST forcing, which decreases vegetation's photosynthetic ac-tivity. This may lead to a higher CO2 concentration than normal in East Asia in High_CO2 period through reduced up-take of CO2 from the atmosphere. This implies that terrestrial vegetation activity influenced by remote SST forcings should be monitored to better understand regional carbon cycles in East Asia.
URI
https://information.hanyang.ac.kr/#/eds/detail?an=S0048969723009932&dbId=edselphttps://repository.hanyang.ac.kr/handle/20.500.11754/190269
ISSN
0048-9697
DOI
10.1016/j.scitotenv.2023.162377
Appears in Collections:
RESEARCH INSTITUTE[E](부설연구소) > INSTITUTE OF OCENA AND ATMOSPHERIC SCIENCES(해양ㆍ대기과학연구소) > Articles
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