BCCZO -- Dissolved Organic Matter (DOM), Lysimeter Water Samples Chemistry, Groundwater Chemistry -- Gordon Gulch: Lower -- (2013-2013)

Authors:

Margaret A. Burns Holly R. Barnard

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CZO Boulder CZO National

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Nov 19, 2019 at 4:53 a.m.

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Dec 23, 2019 at 10:51 p.m.

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Abstract

Soil water, groundwater, and streamwater were collected during the 2013 snowmelt season and analyzed for dissolved organic carbon concentration and dissolved organic matter fluorescence.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Gordon Gulch, Gordon Gulch: Lower

North Latitude

40.0146°

East Longitude

-105.4683°

South Latitude

40.0121°

West Longitude

-105.4696°

Temporal

Start Date:	03/21/2013
End Date:	07/18/2013

Streets Terrain Satelite

Spatial Extent

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Additional Metadata

Name	Value
czos	Boulder
czo_id	3894
citation	Cory, R. M., M.P. Miller, D.M. McKnight, J.J. Guerard, and P.L. Miller (2010). Effect of instrument-specific response on the analysis of fulvic acid fluorescence spectra, Limnol and Oceanography Meth, 8,67–78. Gabor, R.S., M.A. Burns, R.H. Lee, J.B. Elg, C.J. Kemper, H.R. Barnard, and D.M. McKnight. Variations in the chemistry of water-soluble organic matter across a catchment: A spectroscopic investigation. Submitted to: Environ Sci & Techol, 2014. Lawaetz, A J., and C.A. Stedmon (2009). Fluorescence intensity calibration using the Raman scatter peak of water. Applied Spectroscopy, 63(8), 936–940. doi:10.1366/000370209788964548 McKnight, D.M., E.W. Boyer, P.K. Westerhoff, P.T. Doran, T. Kulbe, and D.T. Anderson (2001). Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity. Limnol and Oceanography, 46(1), 38-48. Ohno, T. (2002). Fluorescence inner-filtering correction for determining the humification index of dissolved organic matter. Environ Sci and Technol, 36(4), 742–6. Parlanti, E., K. Wo, L. Geo, and M. Lamotte (2000). Dissolved organic matter fluorescence spectroscopy as a tool to estimate biological activity in a coastal zone submitted to anthropogenic inputs, Organic Geochemistry, 31, 1765–1781. Wilson, H.F., and M.A. Xenopoulous (2008). Effects of agricultural land use on the composition of fluvial dissolved organic matter. Nature Geoscience, doi: 101038/NGE0391. Zsolnay, A., E. Baigar, M. Jimenez, B. Steinweg, and F. Saccomandi (1999). Differentiating with fluorescence spectroscopy the sources of dissolved organic matter in soils subjected to drying. Chemosphere, 38(1), 45-50.
comments	Methods: Samples were collected during the 2013 snowmelt season from soil lysimeters, groundwater wells, and the highest flow in the stream channel in acid-washed and combusted (450°C) glass bottles. Samples were not collected if weather inhibited site access. Groundwater samples were collected by the BcCZO. Locations can be found in the last column. Water samples were returned to the laboratory and filtered through 0.7m combusted glass fiber filters within 24 hours of collection. Samples were stored in the dark at 4°C until analysis. UV-vis was run on an Agilent 8453 UV-vis spectrophotometer (absorbance range 190-1100nm). Samples with an absorbance greater than 0.2cm-1 at 254nm were diluted to less than 0.2cm-1. Fluorescence was run on a Horiba Jobin Yvon Fluoromax-3 Fluorometer. Both instruments are part of the McKnight Laboratory Group, Institute of Arctic and Alpine Research, University of Colorado Boulder. EEMs were created from excitation wavelengths 245-450nm every 10nm and emission 300-550nm every 2nm. Integration time = 0.25s, slitwidth = 5nm. EEMs were then corrected for instrument response and inner-filter effect [Cory et al., 2010; Lawaetz and Stedmon, 2009]. The following spectroscopic indices were retrieved from the corrected EEM: 1. Fluorescence Index: Ratio of emission intensity at 470nm to intensity at 520nm at excitation 370nm [McKnight et al., 2001]. 2. Humification Index: Area under the peak from 435-480nm emission dived by the area under the peak from 300-345 emission at excitation 254nm [Zsolnay et al., 1999; Ohno, 2002]. 3. Freshness Index: Ratio of the intensity at emission 380nm divided by the maximum intensity between 420nm -435nm at excitation 310nm [Parlanti et al., 2000; Wilson and Zenopoulous, 2008]. An eight component site-specific PARAFAC model was used to analyze the data [Gabor et al. Submitted to Environ Sci & Technol, 2014]. This model was created using Soil leachates that were collected across the north- and south-facing slopes of Gordon Gulch. More detailed information on this model can be found in: [Gabor et al. Submitted to Environ Sci & Technol, 2014]. Dissolved organic carbon (DOC) concentration was measured using Pt-catalyzed high temperature combustion (TOC-V CXN Total Organic Carbon Analyzer, Shimadzu Inc., Kyoto, Japan). Detection limit was 0.07 mg C/L. Within run and run to run precision was 1.33% relative standard deviation of standard duplicates. All DOC analysis was performed in the Kiowa Laboratory at The Institute of Arctic and Alpine Research, University of Colorado Boulder.
keywords	Dissolved organic matter, fluorescence, PARAFAC, subsurface flow, snow melt, ecohydrology, DOY = Day of Year, DOC = Dissolved Organic Carbon, DOM = Dissolved Organic Matter, FI = Fluorescence Index, HIX = Humification Index, BIX = Freshness Index,
subtitle	Soil water, groundwater, & stream-water were analyzed for DOC concentration and DOM fluorescence from from lysimeters.
variables	Day of Year, Depth, DOC, Components GG-SQ1:GG-P2, Percent Protein, Ftot, (GG-P1:GG-P1+GG-P2), Components C1_DOC:C8_DOC, Percent Protein_DOC, Ftot_DOC, (GG-P1:GG-P1+GG-P2)_DOC, Percent GG-SQ1: Percent GG-P2_DOC, FI, max emission at 370nm, a254nm, HIX, BIX
disciplines	Biogeochemistry, Hydrology, Water Chemistry

Related Resources

This resource is referenced by	Barnard H., Burns M., McKnight D., Gabor R., Brooks P. (2014). Reconciling stream dissolved organic matter with snowmelt-driven subsurface flowpaths in a montane, headwater catchment (Invited). Abstract H53K-03 presented at 2014 Fall Meeting, AGU, San Francisco, CA, 15-19 Dec.
This resource is referenced by	Burns M.A., McKnight M.D., Gabor R.S., Brooks P.D., Barnard H.R. (2013). Transport and Transformation of Dissolved Organic Matter in Soil Interstitial Water Across Forested, Montane Hillslopes. Abstract H23F-1340 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
Support for data was provided by the U.S. Department of Energy’s Terrestrial Ecosystem Science Program (DOE Award #: DE-SC0006968; PI: Holly		DE-SC0006968

How to Cite

Burns, M. A., H. R. Barnard (2019). BCCZO -- Dissolved Organic Matter (DOM), Lysimeter Water Samples Chemistry, Groundwater Chemistry -- Gordon Gulch: Lower -- (2013-2013), HydroShare, http://www.hydroshare.org/resource/25ba8374892541c4bfe0c9cf18f520ca

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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