Lake Fryxell continuous benthic dissolved oxygen and temperature measurements, McMurdo Dry Valleys, Antarctica, November 2023 to December 2024

To examine benthic dissolved oxygen (DO) dynamics in Lake Fryxell, located in the McMurdo Dry Valleys region of Antarctica, DO and temperature were continuously measured near the sediment–water interface at ~8.8 m depth from November 2023 to December 2024. A PME miniDOT® logger was deployed on the lake floor at 8.82 m depth, recording every 15 minutes from 9 November 2023 to 16 December 2024. An Onset HOBO® DO logger, buoyed slightly above the sediment at 8.80 m depth, recorded at the same 15-minute interval from 9 November 2023 to 6 August 2024. The shorter deployment period reflects the six-month lifespan of the HOBO optical sensor.