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.
Diane McKnight
Director
Natalie Aranda
Grad student
Jared Collins
Grad student
Lauren Magliozzi
Grad student
Tanya Petach
Grad student
Mia Vanderwilt
Grad student
- 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.
News
Rare earth elements and old mines spell trouble for Western water supplies
Publications
Publications for McKnight are shown below
Sensitivity analysis of conservative and reactive stream transient storage models applied to field data from multiple-reach experiments
Publication Date: 2005-05-01
Type: Journal Article
Comment on "El Nino suppresses Antarctic warming" by N. Bertler et al.
Doran 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
Publication Date: 2005-02-01
Type: Journal Article
A temperature-index model of stream flow at below-freezing temperatures in Taylor Valley, Antarctica
Publication Date: 2005-01-01
Type: Journal Article
Chemical characterization of dissolved organic material in Pony Lake, a saline coastal pond in Antarctica
Publication Date: 2004-10-01
Type: Journal Article
Denitrification and hydrologic transient storage in a glacial meltwater stream, McMurdo Dry Valleys, Antarctica
Publication Date: 2004-09-01
Type: Journal Article
Reach-scale cation exchange controls on major ion chemistry of an Antarctic glacial meltwater stream
Publication Date: 2004-09-01
Type: Journal Article
Biogeochemical processes controlling midday ferrous iron maxima in stream waters affected by acid rock drainage
Publication 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
Publication Date: 2004-06-01
Type: Journal Article
Changes in fulvic acid redox state through the oxycline of a permanently ice-covered Antarctic lake
Publication Date: 2004-03-01
Type: Journal Article
The landscape continuum: A model for high-elevation ecosystems
Publication Date: 2004-02-01
Type: Journal Article
Conservative and reactive solute transport in constructed wetlands
Publication Date: 2004-01-27
Type: Journal Article
Transport and cycling of iron and hydrogen peroxide in a freshwater stream: Influence of organic acids
Publication Date: 2003-11-01
Type: Journal Article
Characterization of DOM as a function of MW by fluorescence EEM and HPLC-SEC using UVA, DOC, and fluorescence detection
Publication Date: 2003-10-01
Type: Journal Article
Abandoned mines, mountain sports, and climate variability: Implications for the Colorado tourism economy
Publication Date: 2003-09-23
Type: Journal Article
Modeling hyporheic zone processes - Preface
Publication Date: 2003-09-01
Type: Journal Article
Sources and chemical character of dissolved organic carbon across an alpine/subalpine ecotone, Green Lakes Valley, Colorado Front Range, United States
Publication Date: 2003-07-29
Type: Journal Article
Determining long time-scale hyporheic zone flow paths in Antarctic streams
Publication Date: 2003-06-30
Type: Journal Article
Direct and indirect effects of mine drainage on bacterial processes in mountain streams
Publication Date: 2003-06-01
Type: Journal Article
Surface glaciochemistry of Taylor Valley, southern Victoria Land, Antarctica and its relationship to stream chemistry
Publication Date: 2003-01-01
Type: Journal Article
Climate and hydrologic variations and implications for lake and stream ecological response in the McMurdo Dry Valleys, Antarctica
Type: Chapter
Trace organic moieties of dissolved organic material in natural waters
Type: Chapter
Climate and hydrologic variations and implications for lake and stream ecological response in the McMurdo Dry Valleys, Antarctica
Type: Chapter
Weathering reactions and hyporheic exchange controls on stream water chemistry in a glacial meltwater stream in the McMurdo Dry Valleys
Publication Date: 2002-12-07
Type: Journal Article
Fungal communities and biomass in mountain streams affected by mine drainage
Publication Date: 2002-09-01
Type: Journal Article