气候变化领域集成服务门户(CCPortal): Characterizing CDOM Spectral Variability Across Diverse Regions and Spectral Ranges

CCPortal

DOI	10.1002/2017GB005756
	Characterizing CDOM Spectral Variability Across Diverse Regions and Spectral Ranges
	Grunert B.K.; Mouw C.B.; Ciochetto A.B.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	57
结束页码	77
卷号	32 期号:1
英文摘要	Satellite remote sensing of colored dissolved organic matter (CDOM) has focused on CDOM absorption (aCDOM) at a reference wavelength, as its magnitude provides insight into the underwater light field and large-scale biogeochemical processes. CDOM spectral slope, SCDOM, has been treated as a constant or semiconstant parameter in satellite retrievals of aCDOM despite significant regional and temporal variabilities. SCDOM and other optical metrics provide insights into CDOM composition, processing, food web dynamics, and carbon cycling. To date, much of this work relies on fluorescence techniques or aCDOM in spectral ranges unavailable to current and planned satellite sensors (e.g., <300 nm). In preparation for anticipated future hyperspectral satellite missions, we take the first step here of exploring global variability in SCDOM and fit deviations in the aCDOM spectra using the recently proposed Gaussian decomposition method. From this, we investigate if global variability in retrieved SCDOM and Gaussian components is significant and regionally distinct. We iteratively decreased the spectral range considered and analyzed the number, location, and magnitude of fitted Gaussian components to understand if a reduced spectral range impacts information obtained within a common spectral window. We compared the fitted slope from the Gaussian decomposition method to absorption-based indices that indicate CDOM composition to determine the ability of satellite-derived slope to inform the analysis and modeling of large-scale biogeochemical processes. Finally, we present implications of the observed variability for remote sensing of CDOM characteristics via SCDOM. ©2017. American Geophysical Union. All Rights Reserved.
英文关键词	carbon cycling; colored dissolved organic matter; ocean biogeochemistry
语种	英语
scopus关键词	absorption; biogeochemistry; carbon cycle; dissolved organic matter; food web; Gaussian method; remote sensing; satellite data; sensor; spectral analysis
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129872
作者单位	Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI, United States; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States
推荐引用方式 GB/T 7714	Grunert B.K.,Mouw C.B.,Ciochetto A.B.. Characterizing CDOM Spectral Variability Across Diverse Regions and Spectral Ranges[J],2018,32(1).
APA	Grunert B.K.,Mouw C.B.,&Ciochetto A.B..(2018).Characterizing CDOM Spectral Variability Across Diverse Regions and Spectral Ranges.Global Biogeochemical Cycles,32(1).
MLA	Grunert B.K.,et al."Characterizing CDOM Spectral Variability Across Diverse Regions and Spectral Ranges".Global Biogeochemical Cycles 32.1(2018).