Effects of warming, eutrophication and climate variability on acidification of the seasonally stratified North Yellow Sea over the past 40 years

doi:10.1016/j.scitotenv.2022.152935

CORC > 海洋研究所 > 中国科学院海洋研究所

	Effects of warming, eutrophication and climate variability on acidification of the seasonally stratified North Yellow Sea over the past 40 years
	Li, Cheng-long 3; Yang, De-zhou 2,4; Zhai, Wei-dong 1,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2022-04-01
卷号	815 页码:13
关键词	Coastal acidi fication Aragonite saturation state Paci fic decadal oscillation North Yellow Sea
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2022.152935
通讯作者	Zhai, Wei-dong(wdzhai@sdu.edu.cn)
英文摘要	The North Yellow Sea (NYS) is a productive marginal sea of the western North Pacific. In summer and autumn, CaCO3 saturation states beneath the seasonal thermocline in the NYS have frequently fallen below critical levels, indicating that marine calcifying organisms are under threat. To explore the long-term evolution of the acidification of the NYS, we reconstructed seasonal variations in subsurface aragonite saturation state (omega arag) and pH during 1976-2017, using wintertime and summertime temperature, salinity, dissolved oxygen and pH data mainly from a quality-controlled oceanographic database. Over the past 40 years, the wintertime warming rate in the NYS was twice the rate of global ocean surface warming. Warming-induced decrease in CO2 solubility canceled out a part of the wintertime omega arag decrease caused by atmospheric CO2 increase, and also had minor effect on pH changes in winter. Although the NYS is a semi-enclosed marginal sea, its interannual variations of wintertime temperature, salinity, pH and omega arag were correlated to Pacific Decadal Oscillation with a lag of 2-3 years. Due to the eutrophication-induced enhancement of net community respiration beneath the seasonal thermocline, long-term declines of bottom-water omega arag and pH in summer were substantially faster than the declines of assumed air-equilibrated omega arag and pH in spring. Over the past 40 years, the amplitudes of seasonal variations of bottom-water omega arag and pH from spring to summer/autumn have increased by 4-7 times. This amplification has pushed the NYS towards the critical threshold of net community CaCO3 dissolution at a pace faster than that forecast under scenarios of atmospheric CO2 increase. In summary, our results provide insights into the combined effects of ocean warming, eutrophication, atmospheric CO2 rise and climate variability on coastal hydrochemistry, explaining how the environmental stresses on local marine calcifying organisms and the benthic ecosystem increased over the past 40 years.
资助项目	National Key Research and Development Program of China[2020YFA0608301] ; National Natural Science Foundation of China[42141001] ; National Natural Science Foundation of China[41876019] ; National Natural Science Foundation of China[92158202] ; Senior User Project of R/V KEXUE, Center for Ocean Mega-Science, Chinese Academy of Sciences[KEXUE2020G07]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000767231800015
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178443]
专题	中国科学院海洋研究所
通讯作者	Zhai, Wei-dong
作者单位	1.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519080, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266237, Peoples R China 3.Shandong Univ, Inst Marine Sci & Technol, Qingdao 266237, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Funct Lab Ocean Dynam & Climate, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Li, Cheng-long,Yang, De-zhou,Zhai, Wei-dong. Effects of warming, eutrophication and climate variability on acidification of the seasonally stratified North Yellow Sea over the past 40 years[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,815:13.
APA	Li, Cheng-long,Yang, De-zhou,&Zhai, Wei-dong.(2022).Effects of warming, eutrophication and climate variability on acidification of the seasonally stratified North Yellow Sea over the past 40 years.SCIENCE OF THE TOTAL ENVIRONMENT,815,13.
MLA	Li, Cheng-long,et al."Effects of warming, eutrophication and climate variability on acidification of the seasonally stratified North Yellow Sea over the past 40 years".SCIENCE OF THE TOTAL ENVIRONMENT 815(2022):13.