Freshwater CTD Data: Lake Washington Water Quality Profiles

Profiles of temperature, conductivity, salinity, dissolved oxygen, chlorophyll fluorescence, beam transmission, and surface and subsurface PAR collected monthly to twice monthly on Lake Washington using a SeaBird CTD. The data is hosted by data.kingcounty.gov and was last updated on 2026-05-20. The dataset includes columns for CollectDateTime, Instrument, CollectDate, ParmDisplayName, Value, Depth, and Locator.

Use Cases

• Modeling thermal stratification and mixing events using Depth and Value for temperature over time.
• Analyzing seasonal phytoplankton dynamics using Value for chlorophyll fluorescence and CollectDate.
• Calibrating water quality sensors by comparing Value for conductivity and salinity across different Instruments.
• Studying light attenuation in the water column using Value for PAR and Depth.

Strengths

• Data collection follows a consistent protocol using a SeaBird CTD instrument.
• Includes multiple water quality parameters (e.g., temperature, dissolved oxygen, chlorophyll) in a single profile.
• Temporal resolution is monthly to twice monthly, allowing for seasonal analysis.

Limitations

• Row count and total dataset size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

data.kingcounty.gov

Collection Method

Collected via SeaBird CTD casts on Lake Washington.

Freshness

Last updated 2026-05-20 19:35:51; freshness should be verified.

Geography

Lake Washington