Dataset Overview

Raw high-frequency data of thermal profiles in Lake Erken at the Float site. Data were collected at 30-min intervals from 1991 to 2016 (with periods of missing data spanning years in some cases). The data structure does not include columns for the standard variables that were missing (e.g., dissolved oxygen, pH, etc) because the data set is so large. See Notes on how to acknowledge data provider.

See Full Dataset Documentation


Please see GEISHA Project home page on FEMC website at or see the GEISHA website hosted by INRAE at

Data Collection Status

Data collection for this dataset has been completed

Start date


End date



4036005 records with 6 fields

Data Availability

Available for download

Data License

CC BY - Attribution license logo

Preferred Citation

Stockwell JD, Brentrup JA, Bruel R, Doubek JP, Urrutia-Cordero P, Pierson D (2021) Lake Erken raw high-frequency lake data, 1991-2016. Global Evaluation of the Impacts of Storms on freshwater Habitat and structure of phytoplankton Assemblages (GEISHA) Working Group, FRB Centre for the Synthesis and Analysis of Biodiversity and USGS John Wesley Powell Center. Available online at:

Update Frequency

As needed

Maintenance Plan

Not provided


No links available for this dataset

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Previous Versions
    • Version 1 - 03Jun2021 (created 2021-06-03 by Jason Stockwell)