气候变化领域集成服务门户(CCPortal): Observations and a Model of Net Calcification Declines in Palau's Largest Coral Reef Lagoon Between 1992 and 2015

CCPortal

DOI	10.1029/2020JC016147
	Observations and a Model of Net Calcification Declines in Palau's Largest Coral Reef Lagoon Between 1992 and 2015
	Lentz S.J.; Cohen A.L.; Shamberger K.E.F.; Barkley H.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Net ecosystem calcification (NEC) rates of Palau's largest lagoon and barrier reef system between 1992 and 2015 are estimated from sparse total alkalinity (TA) and salinity measurements and a tidal exchange model in which surface lagoon water transported offshore on the ebb tide is replaced by saltier (denser) ocean water that sinks to the bottom after entering the lagoon on the flood tide. Observed lagoon salinities are accurately reproduced by the model with no adjustable parameters. To accurately reproduce observed lagoon TA, NEC for the lagoon-barrier reef system was 70 mmols m−2 day−1 from 1992 to 1998, 35 mmols m−2 day−1 from 1999 to 2012, and 25 mmols m−2 day−1 from 2013 to 2015. This indicates that Palau's largest lagoon and barrier reef system has not recovered, as of 2015, from the 50% decline in NEC in 1998 caused by the loss of coral cover following a severe bleaching event. The cause of the further decline in NEC in 2012–2013 is unclear. Lagoon residence times vary from 8 days during spring tides to 14 days during neap tides and drive substantial spring-neap variations in lagoon TA (~25% of the mean salinity-normalized ocean-lagoon TA difference). Sparse measurements that do not resolve these spring-neap variations can exhibit apparent long-term variations in alkalinity that are not due to changes in NEC. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	bleaching; calcification; coral reef; net ecosystem calcification; Palau; residence time
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/186762
作者单位	Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Oceanography, Texas A&M University, College Station, TX, United States; Joint Institute for Marine and Atmospheric Research, NOAA Pacific Islands Fisheries Science Center, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Lentz S.J.,Cohen A.L.,Shamberger K.E.F.,et al. Observations and a Model of Net Calcification Declines in Palau's Largest Coral Reef Lagoon Between 1992 and 2015[J],2020,125(8).
APA	Lentz S.J.,Cohen A.L.,Shamberger K.E.F.,&Barkley H..(2020).Observations and a Model of Net Calcification Declines in Palau's Largest Coral Reef Lagoon Between 1992 and 2015.Journal of Geophysical Research: Oceans,125(8).
MLA	Lentz S.J.,et al."Observations and a Model of Net Calcification Declines in Palau's Largest Coral Reef Lagoon Between 1992 and 2015".Journal of Geophysical Research: Oceans 125.8(2020).