Breadcrumb
Organic Matter Spectroscopy Lab
Breadcrumb
Image: Boulder Reservoir by Richard Saxon
We measure the amount and character of dissolved organic matter from diverse ecosystems, especially aquatic ones. We often combine our lab data with field-scale experiments and modeling to understand of the interactions between hydrologic, chemical and biological processes in controlling the dynamics of these systems.
- Nayoung Hur, MS 2022
- Garrett Rue, PhD 2019
- Alia Lauren Khan, NSF Graduate Research Fellow
- Maggie Burns, MA 2014 in Geography; now Hydrologist
- Rachel Gabor, PhD 2013 in Environmental Studies
- Jessica Ebert, MS 2012
Contact & services
Major equipment includes
- Shimadzu TOC analyzer
- Antec 9000 DON analyzer
- Agilent 8453 spectrophotometer
- FluroMax2 fluorometer
- fractionation columns
- Ulter-filtration
Josh Darling kneels to sample algal mats from a rocky meltwater stream near Canada Glacier in the Dry Valleys of Antarctica
Researcher on the grassy shoreline of an alpine lake in the Rocky Mountains.
Publications
Publications for McKnight are shown below
Biogeochemical stoichiometry of Antarctic Dry Valley ecosystems
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Published in: Journal of Geophysical Research: BiogeosciencesBarrett JE; Virginia RA; Lyons WB; McKnight DM; Priscu JC; Doran PT; Fountain AG; Wall DH; Moorhead DL...
- Barrett JE
- Virginia RA
- Lyons WB
- McKnight DM
- Priscu JC
- Doran PT
- Fountain AG
- Wall DH
- Moorhead DL
Publication Date: 2007-02-07
Type: Journal Article
Chemical characterization of DOM in channels of a seasonal wetland
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Mladenov N; McKnight DM; Macko SA; Norris M; Cory RM; Ramberg L
Published in: Aquatic Sciences: research across boundariesPublication Date: 2007-01-01
Type: Journal Article
Characterization of a nitrogen-rich fulvic acid and its precursor algae from solid state NMR
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Mao J; Cory RM; McKnight DM; Schmidt-Rohr K
Published in: Organic GeochemistryPublication Date: 2007-01-01
Type: Journal Article
Hyporheic exchange and fulvic acid redox reactions in an alpine stream/wetland ecosystem, Colorado front range
CU Boulder Authors:
Williams, Mark W; McKnight, Diane Marie
All Authors:
Miller MP; McKnight DM; Cory RM; Williams MW; Runkel RL
Published in: Environmental Science and Technology (Washington)Publication Date: 2006-10-01
Type: Journal Article
Antarctic climate cooling and response of diatoms in glacial meltwater streams
All Authors:
Esposito RMM; Horn SL; McKnight DM; Cox MJ; Grant MC; Spaulding SA; Doran PT; Cozzetto KD
Published in: Geophysical Research LettersPublication Date: 2006-04-15
Type: Journal Article
A stable isotopic investigation of a polar desert hydrologic system, McMurdo Dry Valleys, Antarctica
All Authors:
Gooseff MN; Lyons WB; McKnight DM; Vaughn BH; Fountain AG; Dowling C
Published in: Arctic, Antarctic, and Alpine ResearchPublication Date: 2006-02-01
Type: Journal Article
Spatial and temporal active layer dynamics along three glacial meltwater streams in the McMurdo Dry Valleys, Antarctica
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Conovitz PA; MacDonald LH; McKnight DM
Published in: Arctic, Antarctic, and Alpine ResearchPublication Date: 2006-02-01
Type: Journal Article
Experimental investigations into processes controlling stream and hyporheic temperatures, Fryxell Basin, Antarctica
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Cozzetto K; McKnight D; Nylen T; Fountain A
Published in: Advances in Water ResourcesPublication Date: 2006-02-01
Type: Journal Article
Trophic Dynamics
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Cleveland C; Townsend AR; MCKNIGHT DM
Publication Date: 2006-01-01Type: Chapter
The Lost Seal
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
MCKNIGHT DM
Publication Date: 2006-01-01Type: Book
Fluorescence spectroscopy reveals ubiquitous presence of oxidized and reduced quinones in dissolved organic matter
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Cory RM; McKnight DM
Published in: Environmental Science and Technology (Washington)Publication Date: 2005-11-01
Type: Journal Article
Editorial
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
McKnight D
Published in: Journal of Geophysical Research: BiogeosciencesPublication Date: 2005-09-07
Type: Journal Article
Effects of annual flooding on dissolved organic carbon dynamics within a pristine wetland, the Okavango Delta, Botswana
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Mladenov N; McKnight DM; Wolski P; Ramberg L
Published in: Wetlands: the journal of the Society of Wetland ScientistsPublication Date: 2005-09-01
Type: Journal Article
Spectrofluorometric and spectrophotometric evaluation of the photoreactivity of dissolved organic matter from a coastal lake on Ross Island, Antarctica
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Guerard J; Cory RM; McKnight D; Miller PL
Published in: ACS National Meeting Book of AbstractsPublication Date: 2005-08-28
Type: Journal Article
The specific molecular identification of life experiment (SMILE)
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Sims MR; Cullen DC; Bannister NP; Grant WD; Henry O; Jones R; McKnight D; Thompson DP; Wilson PK
Published in: Planetary and Space SciencePublication Date: 2005-07-01
Type: Journal Article
Sources of dissolved organic matter (DOM) in a Rocky Mountain stream using chemical fractionation and stable isotopes
CU Boulder Authors:
Williams, Mark W; McKnight, Diane Marie
All Authors:
Hood E; Williams MW; Mcknight DM
Published in: Biogeochemistry: an international journalPublication Date: 2005-06-01
Type: Journal Article
Sensitivity analysis of conservative and reactive stream transient storage models applied to field data from multiple-reach experiments
CU Boulder Authors:
McKnight, Diane Marie; Gooseff, Michael N
All Authors:
Gooseff MN; Bencala KE; Scott DT; Runkel RL; McKnight DM
Published in: Advances in Water ResourcesPublication Date: 2005-05-01
Type: Journal Article
Comment on "El Nino suppresses Antarctic warming" by N. Bertler et al.
CU Boulder Authors:
Clow, Gary D; McKnight, Diane Marie
All Authors:
Published in: Geophysical Research LettersDoran PT; Priscu JC; Lyons WB; Walsh JE; Fountain AG; McKnight DM; Moorhead DL; Virginia RA; Wall DH; Clow GD...
- Doran PT
- Priscu JC
- Lyons WB
- Walsh JE
- Fountain AG
- McKnight DM
- Moorhead DL
- Virginia RA
- Wall DH
- Clow GD
Publication Date: 2005-04-08
Type: Journal Article
Carbon limitation of soil respiration under winter snowpacks: potential feedbacks between growing season and winter carbon fluxes
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Brooks PD; McKnight D; Elder K
Published in: Global Change BiologyPublication Date: 2005-02-01
Type: Journal Article
A temperature-index model of stream flow at below-freezing temperatures in Taylor Valley, Antarctica
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Ebnet AF; Fountain AG; Nylen TH; McKnight DM; Jaros CL
Published in: Annals of GlaciologyPublication Date: 2005-01-01
Type: Journal Article
Chemical characterization of dissolved organic material in Pony Lake, a saline coastal pond in Antarctica
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
Brown A; McKnight DM; Chin YP; Roberts EC; Uhle M
Published in: Marine ChemistryPublication Date: 2004-10-01
Type: Journal Article
Denitrification and hydrologic transient storage in a glacial meltwater stream, McMurdo Dry Valleys, Antarctica
CU Boulder Authors:
McKnight, Diane Marie; Gooseff, Michael N
All Authors:
Gooseff MN; McKnight DM; Runkel RL; Duff JH
Published in: Limnology and OceanographyPublication Date: 2004-09-01
Type: Journal Article
Reach-scale cation exchange controls on major ion chemistry of an Antarctic glacial meltwater stream
CU Boulder Authors:
McKnight, Diane Marie; Gooseff, Michael N
All Authors:
Gooseff MN; Mcknight DM; Runkel RL
Published in: Aquatic GeochemistryPublication Date: 2004-09-01
Type: Journal Article
Biogeochemical processes controlling midday ferrous iron maxima in stream waters affected by acid rock drainage
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
McKnight DM; Duren SM
Published in: Applied GeochemistryPublication Date: 2004-07-01
Type: Journal Article
Inorganic N and P dynamics of Antarctic glacial meltwater streams as controlled by hyporheic exchange and benthic autotrophic communities
CU Boulder Authors:
McKnight, Diane Marie
All Authors:
McKnight DM; Runkel RL; Tate CM; Duff JH; Moorhead DL
Published in: Journal of the North American Benthological SocietyPublication Date: 2004-06-01
Type: Journal Article
