气候变化领域集成服务门户(CCPortal): Challenges in Quantifying Air-Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay

CCPortal

DOI	10.1029/2019JC015610
	Challenges in Quantifying Air-Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay
	Herrmann M.; Najjar R.G.; Da F.; Friedman J.R.; Friedrichs M.A.M.; Goldberger S.; Menendez A.; Shadwick E.H.; Stets E.G.; St-Laurent P.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	Estuaries play an uncertain but potentially important role in the global carbon cycle via CO2 outgassing. The uncertainty mainly stems from the paucity of studies that document the full spatial and temporal variability of estuarine surface water partial pressure of carbon dioxide (pCO2). Here, we explore the potential of utilizing the abundance of pH data from historical water quality monitoring programs to fill the data void via a case study of the mainstem Chesapeake Bay (eastern United States). We calculate pCO2 and the air-water CO2 flux at monthly resolution from 1998 to 2018 from tidal fresh to polyhaline waters, paying special attention to the error estimation. The biggest error is due to the pH measurement error, and errors due to the gas transfer velocity, temporal sampling, the alkalinity mixing model, and the organic alkalinity estimation are 72%, 27%, 15%, and 5%, respectively, of the error due to pH. Seasonal, interannual, and spatial variability in the air-water flux and surface pCO2 is high, and a correlation analysis with oxygen reveals that this variability is driven largely by biological processes. Averaged over 1998–2018, the mainstem bay is a weak net source of CO2 to the atmosphere of 1.2 (1.1, 1.4) mol m−2 yr−1 (best estimate and 95% confidence interval). Our findings suggest that the abundance of historical pH measurements in estuaries around the globe should be mined in order to constrain the large spatial and temporal variability of the CO2 exchange between estuaries and the atmosphere. © 2020. The Authors.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186780
作者单位	Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, United States; Department of Earth and Atmospheric Sciences, The City College of New York, City University of New York, New York, NY, United States; CSIRO Oceans and Atmosphere, Hobart, TAS, Australia; U.S. Geological Survey, Mounds View, MN, United States
推荐引用方式 GB/T 7714	Herrmann M.,Najjar R.G.,Da F.,et al. Challenges in Quantifying Air-Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay[J],2020,125(7).
APA	Herrmann M..,Najjar R.G..,Da F..,Friedman J.R..,Friedrichs M.A.M..,...&St-Laurent P..(2020).Challenges in Quantifying Air-Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay.Journal of Geophysical Research: Oceans,125(7).
MLA	Herrmann M.,et al."Challenges in Quantifying Air-Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay".Journal of Geophysical Research: Oceans 125.7(2020).