Data from the development and testing of a multiparameter standard solution for fluorescent dissolved organic matter (fDOM) and algal fluorescence (fChl)
type: Dataset
description: Optical sensors measuring fluorescent dissolved organic matter (fDOM) are increasingly being used in water quality studies because they provide proxy measurements for dissolved organic matter concentrations (DOC). Similarly, chlorophyll-a (chl-a) fluorescence sensors have gained popularity as a means to measure phytoplankton concentration, biomass, and even primary productivity using various approaches. As additional sensors are grouped for in situ monitoring, field calibration checks are becoming quite time consuming for even the basic set of sensors (i.e. pH, specific conductivity, turbidity) that require ongoing verification over timescales ranging from weekly to semi-annual intervals. As such, there is a critical need to establish a means to verify calibrations using a simple, fast, and efficient method in the field to standardize USGS measurements among sensors and across the landscape. Here, we present the results of a mixed standard solution capable of simultaneously verifying calibrations for multiple sensors including fluorescence of dissolved organic matter (fDOM) and fluorescence of chlorophyll-a (fChl).
keyword: amerigeo
keyword: amerigeoss
keyword: california
keyword: california-water-science-center
keyword: ckan
keyword: continuous-monitoring
keyword: environment
keyword: exo-ysi
keyword: fchl
keyword: fdom
keyword: fluorescence
keyword: geo
keyword: geoss
keyword: high-frequency
keyword: national
keyword: north-america
keyword: optical-sensor
keyword: organic-matter
keyword: organic-matter-research-laboratory
keyword: sacramento
keyword: standard-solution
keyword: united-states
keyword: usgs-6075e570d34e018b3201c916
keyword: water-quality
issued: 2025-11-20T23:50:43.729951
modified: 20210616
theme: {geospatial}
contact point: Organization
  fn: Angela Hansen
spatial: Location

US Migrating
type: Agent

Original Metadata
type: Distribution
description: The metadata original format
media type: text/xml
format: XML
access URL: https://data.usgs.gov/datacatalog/metadata/USGS.6075e570d34e018b3201c916.xml
issued: 2022-07-28T19:52:50.985063
modified: 2025-11-20T23:50:43.717267

Digital Data
type: Distribution
description: Landing page for access to the data
media type: application/http
format: XML
access URL: https://doi.org/10.5066/P92RNXBW
issued: 2022-07-28T19:52:50.985074
modified: 2025-11-20T23:50:43.717681