气候变化领域集成服务门户(CCPortal): Reconciling Between Optical and Biological Determinants of the Euphotic Zone Depth

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DOI	10.1029/2020JC016874
	Reconciling Between Optical and Biological Determinants of the Euphotic Zone Depth
	Wu J.; Lee Z.; Xie Y.; Goes J.; Shang S.; Marra J.F.; Lin G.; Yang L.; Huang B.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	The conventional use of optically determined 1% of surface photosynthetically available radiation (PAR) depth (Z1%PAR, λ = 400–700 nm) as a metric for the euphotic zone depth (Zeu) has been a matter of debate for several decades because of frequent inconsistencies with the base of euphotic zone determined biologically, that is, the compensation depth (Zc). In this study, we attempt to reconcile between optical and biological determinants of the euphotic zone through the use of a large data set of coincidental profiles of downwelling irradiance and primary production. These measurements cover open ocean waters in the tropics, subtropics, temperate regions, and from two time-series stations, the Hawaii Ocean Time-series (HOT) and the Bermuda Atlantic Time-series Study (BATS). We report that, at least for these measurements, Z1%PAR is too shallow (by 14.1%) compared to Zc, while Z0.1%PAR is too deep (by 32.7%). Further, the irradiance at Zc (i.e., the compensation irradiance, Ic) varies by a factor of more than five, but its ratio to surface irradiance is relatively stable. In general, Ic corresponds to 0.48 ± 0.23% of surface PAR, or 0.87 ± 0.40% of surface usable solar radiation (USR, for λ = 400–560 nm), or 1.50 ± 0.67% of surface downwelling irradiance at 490 nm. These results suggest that Z0.5%PAR, or Z0.9%USR, or Z1.5%490 could be promising alternatives to bridge the optical and biological determinants of the euphotic zone depths for waters in the open ocean at low to middle latitudes. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	compensation depth; compensation irradiance; euphotic zone depth; net primary production; photosynthetically available radiation; usable solar radiation
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/186342
作者单位	State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; School for the Environment, University of Massachusetts Boston, Boston, MA, United States; Lamont Doherty Earth Observatory at Columbia University, Palisades, NY, United States; Department of Earth and Environmental Sciences, Brooklyn College, Brooklyn, NY, United States; Current Addresses: NOAA, Northeast Fisheries Science Center, Milford Laboratory, Milford, CT, United States
推荐引用方式 GB/T 7714	Wu J.,Lee Z.,Xie Y.,et al. Reconciling Between Optical and Biological Determinants of the Euphotic Zone Depth[J],2021,126(5).
APA	Wu J..,Lee Z..,Xie Y..,Goes J..,Shang S..,...&Huang B..(2021).Reconciling Between Optical and Biological Determinants of the Euphotic Zone Depth.Journal of Geophysical Research: Oceans,126(5).
MLA	Wu J.,et al."Reconciling Between Optical and Biological Determinants of the Euphotic Zone Depth".Journal of Geophysical Research: Oceans 126.5(2021).