Idiosyncratic phenology of greenhouse gas emissions in a Mediterranean reservoir Rodríguez Velasco, Eva Peralta Maraver, Ignacio Fernando Martínez García, Andrés García Alguacil, Miriam Picazo Mota, Félix J. Gonçalves, Rodrigo L. Ramón, Cintia Morales Baquero, Rafael J. Rueda, Francisco Reche Cañabate, Isabel Extreme hydrological and thermal regimes characterize the Mediterranean zone and can influence the phenology of greenhouse gas (GHG) emissions in reservoirs. Our study examined the seasonal changes in GHG emissions of a shallow, eutrophic, hardwater reservoir in Spain. We observed distinctive seasonal patterns for each gas. CH4 emissions substantially increased during stratification, influenced predominantly by the increase in water temperature, net ecosystem production, and the decline in reservoir mean depth. N2O emissions mirrored CH4's seasonal trend, significantly correlating to water temperature, wind speed, and gross primary production. Conversely, CO2 emissions decreased during stratification and displayed a quadratic, rather than a linear relationship with water temperature—an unexpected deviation from CH4 and N2O emission patterns—likely associated with photosynthetic uptake of bicarbonate and formation of intracellular calcite that might be exported to sediments. This investigation highlights the imperative of integrating these idiosyncratic patterns into GHG emissions models, enhancing their predictive power. 2024-07-22T11:35:36Z 2024-07-22T11:35:36Z 2024-06-05 journal article Rodríguez Velasco, E. et. al. Limnol. Oceanogr. Lett, 9: 364-375. [https://doi.org/10.1002/lol2.10409] https://hdl.handle.net/10481/93367 10.1002/lol2.10409 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional ASLO