Farskie Lake survey, 2026

A seventy-minute LIFL-11 survey of Farskie Lake near Gliwice on the morning of 19 June 2026, calibrated against nine sampling stations to chlorophyll-a in µg/L and CDOM in a.u.

Preliminary figures

Interpolated campaign fields from the team's first processing pass, before calibration and review; values may change.

Interpolated chlorophyll a field from the calibrated 355 nm channel along the LIFL-11 track, 5.5 to 17.5 µg/L across nine sampling stations, Farskie Lake, 19 June 2026 — Fig. 1Chlorophyll a

Interpolated CDOM field along the LIFL-11 track, 0.8 to 1.44 a.u. across nine sampling stations, Farskie Lake, 19 June 2026 — Fig. 2CDOM

Farskie LakeCentral Europe

● Farskie Lake 2026, 2026-06-196,144 measurements IDW interpolation, 600 samples

Chl-a5.3914.1µg/L

CDOM0.851.32a.u.

Fig. 3 Campaign measurement record. 6,144 lidar returns are plotted along the vessel track for Chl-a, CDOM. The field view applies inverse-distance weighting to the same observations; the shoreline is from OpenStreetMap.

On the morning of 19 June 2026 the LIFL-11 surveyed Farskie Lake, a small water body at Przyszowice on the southern edge of the Upper Silesian conurbation, with the teams from the University of Warsaw and the University of Silesia in Katowice that had spent the three days before on Goczałkowice Reservoir. The boat covered the lake between 11:03 and 12:12 UTC and returned to the reservoir for an evening pass the same day.

Water samples from nine stations along the track calibrated the lidar returns, so this survey is reported in concentration units. Chlorophyll-a from the 355 nm channel ran from 4.8 to 17.1 µg/L along the track with a median of 8.5 µg/L, and CDOM from 0.81 to 1.43 a.u. with a median of 0.90 a.u.