气候变化领域集成服务门户(CCPortal): Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans

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DOI	10.1007/s10533-021-00769-9
	Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans
	Akhand A.; Chanda A.; Watanabe K.; Das S.; Tokoro T.; Chakraborty K.; Hazra S.; Kuwae T.
发表日期	2021
ISSN	1682563
起始页码	95
结束页码	114
卷号	153 期号:1
英文摘要	Globally, water bodies adjacent to mangroves are considered significant sources of atmospheric CO2. We directly measured the partial pressure of CO2 in water [pCO2(water)] and related biogeochemical parameters with high temporal resolution, covering both diel and tidal cycles, in the mangrove-surrounding waters around the northern Bay of Bengal during the post-monsoon season. Mean pCO2(water) was marginally oversaturated in two creeks (470 ± 162 µatm, mean ± SD) and undersaturated in the adjoining estuarine stations (387 ± 58 µatm) compared to atmospheric pCO2, and was considerably lower than the global average. We further estimated the pCO2(water) and buffering capacity of all possible sources of the mangrove-surrounding waters and concluded that their character as a CO2 sink or weak source is due to the predominance of marine water from the Bay of Bengal with low pCO2 and high buffering capacity. Marine water with high buffering capacity suppresses the effect of pCO2 increase within the mangrove system and lowers the CO2 evasion even in creek stations. The δ13C of dissolved inorganic carbon (DIC) in the mangrove-surrounding waters indicated that the DIC sources were a mixture of mangrove plants, pore-water, and groundwater, in addition to marine water. Finally, we showed that the CO2 evasion rate from the estuaries of the Sundarbans is much lower than the recently estimated world average. Our results demonstrate that mangrove areas having such low emissions should be considered when up-scaling the global mangrove carbon budget from regional observations. © 2021, The Author(s).
英文关键词	Air–water CO2 flux; Estuary; Low CO2 emission; Mangrove-surrounding waters; pCO2(water)
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184617
作者单位	Coastal and Estuarine Environment Research Group, Port and Airport Research Institute, Yokosuka, Kanagawa, Japan; School of Oceanographic Studies, Jadavpur University, Kolkata, West Bengal, India; Center for Global Environmental Research (CGER), National Institute for Environmental Studies, Tsukuba, Japan; Indian National Center for Ocean Information Services, Ministry of Earth Sciences, Hyderabad, India
推荐引用方式 GB/T 7714	Akhand A.,Chanda A.,Watanabe K.,et al. Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans[J],2021,153(1).
APA	Akhand A..,Chanda A..,Watanabe K..,Das S..,Tokoro T..,...&Kuwae T..(2021).Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans.Biogeochemistry,153(1).
MLA	Akhand A.,et al."Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans".Biogeochemistry 153.1(2021).