The dataset comprises three files, each containing geo-referenced information with corresponding timestamps. The names of the four ponds are written in French according to the official name defined by Brussels Environment (BE) (i.e. Leybeek, Pêcheries, Tenreuken and Silex). · DATA_Dissolved contains water temperature (°C), Chlorophyll-a concentration (µg L -1 ), oxygen saturation (%O 2 , in %), total suspended matter concentration (TSM, in mg L -1 ), inorganic nutrients (nitrate : NO 3 - , nitrite : NO 2 - , ammonium : NH 4 + , soluble reactive phosphorus : SRP, in µmol L -1 ), partial pressure of CO 2 (pCO 2 , in ppm) , dissolved CH 4 concentration (CH 4 , in nmol L -1 ), N 2 O saturation level (%N 2 O, in %) and 13 C/ 12 C ratio of CH 4 (δ 13 C-CH 4 , in ‰) collected from June 2021 to December 2023 in four ponds in Brussels. · DATA_Ebullitive contains wind speed (m s -1 ), water temperature (°C), atmospheric pressure (atm), bubbles flux measured with inverted funnels (mL m -2 d -1 ), CH 4 content in bubbles (%CH 4 , in %) and 13 C/ 12 C ratio of CH 4 (δ 13 C-CH 4 , in ‰) of CH 4 in the bubbles measured with three bubble traps in spring, summer, and fall in 2022 and 2023, totaling 8 days in the Leybeek, Pêcheries, and Tenreuken ponds and 24 days in the Silex pond. · DATA_perturbed_sediments contains 13 C/ 12 C ratio of CH 4 (δ 13 C-CH 4 , in ‰) of CH 4 in the bubbles present in the sediment directly sampled with bubble traps by physically perturbing the sediment with a wooden rod the fourth September 2023 in the four ponds. Field sampling and meteorological data Sampling was done from a pontoon, with 60mL polypropylene syringes for gases (CO 2 , CH 4 , N 2 O) and a 2L polyethylene water container for processing at the home laboratory for other variables. Water temperature and %O 2 were measured in-situ with VWR MU 6100H probe. pCO 2 was measured with a Li-Cor Li-840 infrared gas analyser (IRGA) based on the headspace technique with 4 polypropylene syringes (Borges et al., 2019). The Li-Cor 840 IRGA was ...