Browsing by Subject "dissolved organic matter"

Now showing 1 - 3 of 3
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    Optical and Photochemical Data of Prairie Wetlands Collected in North Dakota and Minnesota from 2012-July to 2014-November
    (2017-03-07) Arnold, William A; arnol032@umn.edu; Arnold, William A; McCabe, Andrew, J
    Surface water samples were collected from seven prairie pothole wetlands between 2012-July and 2014-November. Optical and photochemical parameters of the samples were measured under controlled laboratory conditions. The data were collected to better understand the way in which seasonal changes and spatial differences in prairie wetland water chemistry influence photochemistry. Samples are identified by the month and year in which they were collected and the typical hydroperiod of the wetland surface water (temporary or semi-permanent). Rates of formation, steady-state concentrations, and apparent quantum yields (or appropriate proxies) were measured for triplet excited states of dissolved organic matter, singlet oxygen, hydroxyl radical, and carbonate radical under a broadband xenon-arc lamp with a 290-nm wavelength filter.
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    Optical and photochemical data of temperate wetland samples collected in Minnesota, USA from 2014-August to 2015-October
    (2018-06-01) Arnold, William A; McCabe, Andrew J; arnol032@umn.edu; Arnold, William A
    Wetland surface water samples were collected from 39 sites throughout Minnesota, USA between 2014-August and 2015-October. Optical and photochemical parameters of the samples were measured under controlled laboratory conditions. The data were collected to identify environmental variables that constrain the yield of triplet excited states of dissolved natural organic matter. Apparent quantum yields of these triplet states were measured using the chemical probe, 2,4,6-trimethylphenol, under a broadband xenon-arc lamp with a 290-nm wavelength filter.
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    Photochemical Data of Stormflow Samples Collected Near Minneapolis and St. Paul, Minnesota from 2014-September to 2015-October
    (2017-08-24) McCabe, Andrew J; Arnold, William A; arnol032@umn.edu; Arnold, William A
    Stormflow samples were collected from 31 sites near Minneapolis and St. Paul, Minnesota between 2014-September and 2015-October. Optical and photochemical parameters of the samples were measured under controlled laboratory conditions. The data were collected to better understand the way in which land cover with variable levels of human impact influence the formation rate and yield of triplet excited states of dissolved natural organic matter (3DOM*). Rates of formation (Rf,T) and apparent quantum yields (AQYT) were measured for 3DOM* using the chemical probe, 2,4,6-trimethylphenol, under a broadband xenon-arc lamp with a 290-nm wavelength filter.