Characterizing dissolved organic matter fluorescence with parallel factor analysis: a tutorial Tập 6 Số 11 - Trang 572-579 - 2008
Colin A. Stedmon, Rasmus Bro
A sub‐fraction of dissolved organic matter fluoresces when excited with ultraviolet light. This property is used to quantify and characterize changes in dissolved organic matter (DOM) in aquatic environments. Detailed mapping of the fluorescence properties of DOM produces excitation emission matrices (EEM), which are well suited to multi‐way data analysis techniques (chemometrics). Techniq...... hiện toàn bộ A simple and efficient method for the solid‐phase extraction of dissolved organic matter (SPE‐DOM) from seawater Tập 6 Số 6 - Trang 230-235 - 2008
Thorsten Dittmar, Boris Koch, Norbert Hertkorn, Gerhard Kattner
A simple protocol is presented for the solid‐phase extraction of dissolved organic matter (SPE‐DOM) from seawater using commercially prepacked cartridges. The method does not require major instrumentation and can be performed in the field. Modified styrene divinyl benzene polymer type sorbents (Varian PPL and ENV) and sorbents of a silica structure bonded with different hydrocarbon chains ...... hiện toàn bộ Relationship between wind speed and gas exchange over the ocean revisited Tập 12 Số 6 - Trang 351-362 - 2014
Rik Wanninkhof
The relationship between gas exchange and wind speed is used extensively for estimating bulk fluxes of atmospheric gases across the air‐sea interface. Here, I provide an update on the frequently used method of Wanninkhof (1992). The update of the methodology reflects advances that have occurred over the past two decades in quantifying the input parameters. The general principle of obtainin...... hiện toàn bộ Inner filter correction of dissolved organic matter fluorescence Tập 11 Số 12 - Trang 616-630 - 2013
Dolly N. Kothawala, Kathleen R. Murphy, Colin A. Stedmon, Gesa A. Weyhenmeyer, Lars J. Tranvik
The fluorescence of dissolved organic matter (DOM) is suppressed by a phenomenon of self‐quenching known as the inner filter effect (IFE). Despite widespread use of fluorescence to characterize DOM in surface waters, the advantages and constraints of IFE correction are poorly defined. We assessed the effectiveness of a commonly used absorbance‐based approach (ABA), and a recently proposed ...... hiện toàn bộ Evaluation of diagnostic pigments to estimate phytoplankton size classes Tập 18 Số 10 - Trang 570-584 - 2020
Alison Chase, Sasha J. Kramer, Nils Haëntjens, Emmanuel Boss, Lee Karp‐Boss, Mimi Edmondson, Jason R. Graff
AbstractPhytoplankton accessory pigments are commonly used to estimate phytoplankton size classes, particularly during development and validation of biogeochemical models and satellite ocean color‐based algorithms. The diagnostic pigment analysis (DPA) is based on bulk measurements of pigment concentrations and relies on assumptions regarding the presence of specif...... hiện toàn bộ WACODI: A generic algorithm to derive the intrinsic color of natural waters from digital images Tập 13 Số 12 - Trang 697-711 - 2015
Stéfani Novoa, Marcel Robert Wernand, H.J. van der Woerd
AbstractThis document presents the WAter COlor from Digital Images (WACODI) algorithm, which extracts the color of natural waters from images collected by low‐cost digital cameras, in the context of participatory science and water quality monitoring. SRGB images are converted to the CIE XYZ color space, undergoing a gamma expansion and illumination correction that ...... hiện toàn bộ