气候变化领域集成服务门户(CCPortal): High pore-water derived CO 2 and CH 4 emissions from a macro-tidal mangrove creek in the Amazon region

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DOI	10.1016/j.gca.2018.12.029
	High pore-water derived CO 2 and CH 4 emissions from a macro-tidal mangrove creek in the Amazon region
	Call M.; Santos I.R.; Dittmar T.; de Rezende C.E.; Asp N.E.; Maher D.T.
发表日期	2019
ISSN	167037
起始页码	106
结束页码	120
卷号	247
英文摘要	This paper presents the first aquatic CO 2 and CH 4 flux estimates from a macro-tidal mangrove creek located in the 0–5° latitude band, where ∼30% of the world's mangroves occur. High resolution dissolved CO 2 , CH 4 and 222 Rn (a natural pore-water tracer) concentrations were measured over a spring-neap tidal cycle from a mangrove tidal creek located in North Brazil (∼0.8°S). Surface water pCO 2 , CH 4 and 222 Rn ranged from 592 to 15,361 μatm, 58 to 1469 nM, and 585 to 16,583 dpm m −3 with considerable temporal variability observed semi diurnally (i.e. hourly) and over the spring-neap cycle (i.e. weekly). Tidally-driven pore-water exchange (tidal pumping) drove surface water pCO 2 and CH 4 , leading to high concentrations at low-tide (semi-diurnal variability). Higher pCO 2 and CH 4 were also observed after the inundation of the upper inter-tidal flat, with peak values coinciding with the “first flush” of aged pore-waters. We hypothesise that additional pore-water exchanges occur during forest inundation in macro-tidal mangrove systems, controlling mangrove creek water pCO 2 and CH 4 over spring-neap cycles. Estimated CO 2 and CH 4 water-atmosphere fluxes were 174 ± 129 mmol m −2 d −1 and 855 ± 406 μmol m −2 d −1 , respectively. These emissions are amongst the highest reported for mangrove systems worldwide and suggests that the most recent global estimates based mostly on data from higher latitudes may have underestimated the role of mangroves in greenhouse gas emissions. © 2018 Elsevier Ltd
英文关键词	Blue carbon; Coastal carbon; Organic matter; Submarine groundwater discharge
scopus关键词	carbon cycle; carbon dioxide; carbon emission; coastal zone; concentration (composition); discharge; emission inventory; groundwater; mangrove; methane; organic matter; porewater; Rhizophoraceae
来源期刊	Geochimica et Cosmochimica Acta
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176490
作者单位	National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, Coffs Harbour, NSW 2450, Australia; School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia; Southern Cross Geoscience, Southern Cross University, Lismore, NSW 2480, Australia; Carl von Ossietzky University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky-Str. 9-11, Oldenburg, 26129, Germany; Universidade Estadual do Norte Fluminense, Centro de Biociências e Biotecnologia, Laboratório de Ciências Ambientais, Grupo de Biogeoquímica e Ecossistemas Aquáticos, Av. Alberto Lamego 2000, Parque Califórnia, Campos dos GoytacazesRJ 28013-602, Brazil; Institute for Coastal Studies, Universidade Federal do Pará (UFPA), Alam. Leandro Ribeiro, s/n – Bairro Aldeia Campus, Bragança, PA 68600-000, Brazil
推荐引用方式 GB/T 7714	Call M.,Santos I.R.,Dittmar T.,et al. High pore-water derived CO 2 and CH 4 emissions from a macro-tidal mangrove creek in the Amazon region[J],2019,247.
APA	Call M.,Santos I.R.,Dittmar T.,de Rezende C.E.,Asp N.E.,&Maher D.T..(2019).High pore-water derived CO 2 and CH 4 emissions from a macro-tidal mangrove creek in the Amazon region.Geochimica et Cosmochimica Acta,247.
MLA	Call M.,et al."High pore-water derived CO 2 and CH 4 emissions from a macro-tidal mangrove creek in the Amazon region".Geochimica et Cosmochimica Acta 247(2019).