globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069878
论文题名:
Chromophoric signatures of microbial by-products in the dark ocean
作者: Catalá T.S.; Reche I.; Ramón C.L.; López-Sanz À.; Álvarez M.; Calvo E.; Álvarez-Salgado X.A.
刊名: Geophysical Research Letters
ISSN: 0094-8857
EISSN: 1944-8588
出版年: 2016
卷: 43, 期:14
起始页码: 7639
结束页码: 7648
语种: 英语
英文关键词: aging ; chromophoric dissolved organic matter (CDOM) ; cytochrome c ; global ocean ; nitrate ; water masses
Scopus关键词: Absorption spectra ; Absorption spectroscopy ; Aging of materials ; Biological materials ; Electromagnetic wave absorption ; Nitrates ; Oceanography ; Water absorption ; Absorption peaks ; Chromophoric dissolved organic matter ; Cytochrome c ; Exponential-decay curves ; Global ocean ; Humic substances ; Intermediate waters ; Water mass ; Chromophores
英文摘要: Detailed examination of the absorption spectra from dark ocean samples allowed us to identify and deconvolve two distinct chromophores centered at 302 nm (UV) and 415 nm (visible) from the exponential decay curve characteristic of humic substances. The UV chromophore was ubiquitous in intermediate and deep waters, and it has been proposed as the secondary absorption peak of nitrate. The visible chromophore was prominent at the central and intermediate water masses of the North Pacific, and it has been proposed as cytochrome c. Subtraction of the modeled absorption spectra of the two chromophores from the measured absorption spectrum of the samples leads to a spectral slope overestimation by 13.3 ± 6.0% for S275–295 and 14.8 ± 10.6% for S350–400. To only consider the chromophoric fraction of DOM, the absorption spectra of nitrate should be subtracted in samples with a [NO3−]:a302 ratio > 70 µM m. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979784198&doi=10.1002%2f2016GL069878&partnerID=40&md5=1ff5c795152857e55efc940d095eb6d2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9820
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Departamento de Ecología and Instituto del Agua, Universidad de Granada, Granada, Spain

Recommended Citation:
Catalá T.S.,Reche I.,Ramón C.L.,et al. Chromophoric signatures of microbial by-products in the dark ocean[J]. Geophysical Research Letters,2016-01-01,43(14).
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