气候变化领域集成服务门户(CCPortal): Seasonal Variations of Carbonate Chemistry at Two Western Atlantic Coral Reefs

CCPortal

DOI	10.1029/2020JC016108
	Seasonal Variations of Carbonate Chemistry at Two Western Atlantic Coral Reefs
	Meléndez M.; Salisbury J.; Gledhill D.; Langdon C.; Morell J.M.; Manzello D.; Rodriguez-Abudo S.; Musielewicz S.; Sutton A.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Time series from open ocean fixed stations have robustly documented secular changes in carbonate chemistry and long-term ocean acidification (OA) trends as a direct response to increases in atmospheric carbon dioxide (CO2). However, few high-frequency coastal carbon time series are available in reef systems, where most affected tropical marine organisms reside. Seasonal variations in carbonate chemistry at Cheeca Rocks (CR), Florida, and La Parguera (LP), Puerto Rico, are presented based on 8 and 10 years of continuous, high-quality measurements, respectively. We synthesized and modeled carbonate chemistry to understand how physical and biological processes affect seasonal carbonate chemistry at both locations. The results showed that differences in biology and thermodynamic cycles between the two systems caused higher amplitudes at CR despite the shorter residence times relative to LP. Analyses based on oxygen and temperature-normalized pCO2sw showed that temperature effects on pCO2sw at CR were largely counteracted by primary productivity, while thermodynamics alone explained a majority of the pCO2sw dynamics at LP. Heterotrophy dominated from late spring to fall, and autotrophy dominated from winter to early spring. Observations suggested that organic respiration decreased the carbonate mineral saturation state (Ω) during late summer/fall. The interactive effects between the inorganic and organic carbon cycles and the assumed effects of benthic metabolism on the water chemistry at both sites appeared to cause seasonal hysteresis with the carbonate chemistry. Improved integration of observational data to modeling approaches will help better forecast how physical and biogeochemical processes will affect Ω and carbonate chemistry in coastal areas. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atlantic; carbonate chemistry; coral reef; ocean acidification; seasonal hysteresis
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/186763
作者单位	Department of Earth Sciences and Ocean Processes Analysis Laboratory, University of New Hampshire, Durham, NH, United States; National Oceanic and Atmospheric Administration (NOAA), Ocean Acidification Program, Silver Spring, MD, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Department of Marine Sciences, University of Puerto Rico, Mayagüez, PR, United States; Caribbean Coastal Ocean Observing System, NOAA, Magueyes Island, Lajas, PR, United States; Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, United States; Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Meléndez M.,Salisbury J.,Gledhill D.,et al. Seasonal Variations of Carbonate Chemistry at Two Western Atlantic Coral Reefs[J],2020,125(8).
APA	Meléndez M..,Salisbury J..,Gledhill D..,Langdon C..,Morell J.M..,...&Sutton A..(2020).Seasonal Variations of Carbonate Chemistry at Two Western Atlantic Coral Reefs.Journal of Geophysical Research: Oceans,125(8).
MLA	Meléndez M.,et al."Seasonal Variations of Carbonate Chemistry at Two Western Atlantic Coral Reefs".Journal of Geophysical Research: Oceans 125.8(2020).