Chromophoric organic matter

Author: tndr

August undefined, 2024

Colored dissolved organic matter (CDOM) is the optically measurable component of dissolved organic matter in water. Also known as chromophoric dissolved organic matter, yellow substance, and gelbstoff, CDOM occurs naturally in aquatic environments and is a complex mixture of many hundreds … See more The concentration of CDOM can have a significant effect on biological activity in aquatic systems. CDOM diminishes light intensity as it penetrates water. Very high concentrations of CDOM can have a limiting effect on See more Traditional methods of measuring CDOM include UV-visible spectroscopy (absorbance) and fluorometry (fluorescence). Optical proxies have been developed to characterize sources and properties of CDOM, including specific ultraviolet … See more • The Color of the Ocean from science@NASA See more • Blackwater river • Color of water • Dissolved organic carbon (DOC) • Ocean turbidity • Secchi disk See more WebApr 8, 2024 · Reactive oxygen species played an important role in the photodegradation of POM, and excited triplet state chromophoric dissolved organic matter (3 CDOM*) was mainly responsible for POM photodegradation. These results provide new insights into the P biogeochemical cycle and POM photodegradation in aquatic ecosystems.

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WebMar 9, 2024 · Wetlands export chromophoric dissolved organic matter (CDOM) to estuaries, where CDOM is removed and transformed through biotic and abiotic process, subsequently impacting nutrient cycling, light availability, ecosystem metabolism, and phytoplankton activity. WebOct 4, 2016 · The fluorescence and chemical-structural characteristics of the chromophoric water-soluble organic matter in submicron aerosols collected in urban, forest, and … fmhk72035wh

Sources, Distributions, and Dynamics of Dissolved Organic Matter …

WebJun 1, 2014 · Dissolved organic matter (DOM) rich water samples (Great Dismal Swamp, Virginia) were 0.1-μm filtered and UV-irradiated in a … WebMar 10, 2024 · Chromophoric dissolved organic matter (CDOM) plays an important role in the biogeochemical cycle and energy flow of aquatic ecosystems. Thus, systematic and comprehensive understanding of CDOM dynamics is critically important for aquatic ecosystem management. CDOM spans multiple study fields, including analytical … WebEnter the email address you signed up with and we'll email you a reset link. fmh leeds university

Chromophoric Definition & Meaning - Merriam-Webster

Chromophoric organic matter

Characterization of bulk and chromophoric dissolved …

WebDec 19, 2024 · This works aims at assessing the ability of European rivers to photoproduce reactive transient intermediates, such as HO • radicals and the excited triplet states of chromophoric dissolved organic matter (3 CDOM*), involved in pollutant degradation. A photochemical mapping of the steady-state concentrations of these transients was … WebOct 25, 2013 · CDOM biogeochemical cycle is driven by several physical and biological processes such as river input, biogeneration and photobleaching that act as primary …

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WebMar 1, 2024 · 1. Introduction. Originated from the decomposition of plants and animal residues during microbial metabolism, chromophoric dissolved organic matter (CDOM) is an integrated mixture of organic compounds with high heterogeneity, and its wide presence plays a crucial role in various processes in terrestrial and aquatic ecosystems … WebNov 8, 2010 · Abstract. The high-mountain lakes on the Yungui Plateau in China are exposed to high-intensity ultraviolet radiation, and contain low concentrations of …

WebJun 1, 2002 · 1.. IntroductionThe absorption of light by the chromophore-containing constituents of dissolved organic matter (CDOM) initiates a variety of important processes in surface waters, including the deposition of heat (Kirk, 1988), the production of luminescence Blough and Green, 1995, Vodacek et al., 1995, Coble et al., 1990, and the … WebDec 1, 2024 · Chromophoric dissolved organic matter (CDOM) is the light-absorbing component of DOM (Green & Blough, 1994). CDOM in lakes is primarily of allochthonous origin from soils and terrestrial plants, with …

WebChromophoric Dissolved Organic Matter or Colored Dissolved Organic Matter (CDOM): Both refer to organic matter in water that absorbs strongly in the ultraviolet (UV) … WebThe present study demonstrates that the spectral slope coefficient of chromophoric dissolved organic matter (CDOM) between 275 nm and 295 nm (S 275–295) can be …

WebAug 4, 2024 · Abstract. Atmospheric chromophoric organic matter (COM) plays a fundamental role in photochemistry and aerosol aging. However, the effects of photodegradation on chemical components and photochemical …

WebThe meaning of CHROMOPHORE is a chemical group (such as an azo group) that absorbs light at a specific frequency and so imparts color to a molecule; also : a colored chemical … fmh limited llcWebColor Dissolved Organic Matter (CDOM) Background information Colored (or chromophoric) dissolved organic matter (CDOM) is the portion of organic matter that absorbs light in the blue and UV part of the electromagnetic spectrum, staining water a “tea-like” color. CDOM plays a major role in controlling freshwater ecosystem fmh login fortbildungWebApr 9, 2024 · Dissolved organic matter (DOM) is an important component in the biogeochemical cycles of elements like nitrogen (N) and carbon. The aim of this study was to elucidate the effect of long-term inorganic N addition on the quantity and quality of DOM in forest soils. A field study was conducted on three forms of inorganic N, namely … fmh loopWebThe fluorescence and chemical–structural characteristics of the chromophoric water-soluble organic matter in submicron aerosols collected in urban, forest, and marine … fmh login portalWebJun 28, 2024 · Chromophores, Fluorescence, Light absorption, Particulate matter Abstract Organic compounds are important contributors to the oxidative potential (OP) of atmospheric aerosols. This study is the first to report the OP of water-soluble organic matter (WSOM) related to the chromophoric substances in PM 2.5 over Xi’an, China. greens chevy peoria ilWebchro·mo·phore. (krō′mə-fôr′) n. Any of various chemical groups that absorb light of certain wavelengths and when present in an organic compound, such as a dye or pigment, are … greenschist metamorphic rocksWebMay 25, 2004 · The analysis of the lidar-induced fluorescence emission spectra in situ of the surface seawater layer combined with the results of the ground-true (chlorophyll a concentration) measurements carried o green schist quarry scotland