2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | Spectroscopic time series from continental network of in situ sensors indicate water clarity influences organic matter processing rates | Virtual Platform
Spectroscopic time series from continental network of in situ sensors indicate water clarity influences organic matter processing rates
High frequency spectroscopy measurements in freshwaters hold promise for estimating organic matter processing rates in situ. However, difficulties correcting and interpreting spectroscopy data have limited application of this tool. We leveraged a network spanning the United States—including National Ecological Observatory Network (NEON) sites—of in situ sensors measuring ultraviolet-visible (UV-Vis) absorbance (collected with SUNA sondes) to interpret freshwater optical spectroscopy time series. We predicted that diel changes to high frequency UV-Vis absorbance spectra can be used to measure transformation and production of DOM. For example, we expected that streams with high aromatic DOM levels and low canopy cover would exhibit changes to UV-Vis absorbance spectra around solar noon indicative of DOM photo-oxidation. Where water clarity was high (low turbidity and aromatic DOM) and canopy cover was low, we predicted certain fractions of DOM would increase throughout the day, indicative of photosynthetic DOM production. After applying a revised temperature correction to UV-Vis and fDOM time series, we found that diel signals were correlated to insolation, turbidity, canopy cover, and fDOM levels. Using this analysis, we estimate that photosynthesis exceeds photo-oxidation in most lakes, streams, and rivers studied.
- Carbon cycle
- Nutrient cycling
- Big data
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Jacob Hosen
(), Purdue University, jhosen@purdue.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Joanna Blaszczak
(), Global Water Center and Department of Natural Resources and Environmental Science, University of Nevada, Reno, jblaszczak@unr.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Matthew Cohen
(), University of Florida, mjc@ufl.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Robert Hensley
(), Battelle, National Ecological Observatory Network , hensley@battelleecology.org;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Kelly Hondula
(), National Environmental Observation Network, khondula@sesync.org;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
William H. McDowell
(), University of New Hampshire, bill.mcdowell@unh.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jody Potter
(), University of New Hampshire, jody.potter@unh.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Peter Raymond
(), Yale University, peter.raymond@yale.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Kevin Ryan
(), Northeastern University, ryan.kevi@northeastern.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Bryan Yoon
(), Northeastern University, b.yoon@northeastern.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -