{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T03:07:20Z","timestamp":1789182440528,"version":"build-2803163510"},"reference-count":98,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:00:00Z","timestamp":1783468800000},"content-version":"vor","delay-in-days":7,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Global Change Biology"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Reservoirs are increasingly recognized as important sources of greenhouse gases (GHGs), yet the temporal scales and environmental drivers governing CO\n                    <jats:sub>2<\/jats:sub>\n                    and CH\n                    <jats:sub>4<\/jats:sub>\n                    flux variability remain poorly constrained. This is particularly the case for Mediterranean systems, which are subject to strong hydrological variability. Here, we present and analyze year\u2010round, high\u2010frequency eddy covariance measurements of CO\n                    <jats:sub>2<\/jats:sub>\n                    and CH\n                    <jats:sub>4<\/jats:sub>\n                    fluxes in a Mediterranean reservoir over two\u2009years with contrasting hydrological conditions, explicitly evaluating variability at diurnal, multiday, and seasonal timescales. The reservoir acted as a net source of both gases in both years, but CH\n                    <jats:sub>4<\/jats:sub>\n                    fluxes exhibited substantially greater temporal variability than CO\n                    <jats:sub>2<\/jats:sub>\n                    fluxes. The seasonal component dominated CH\n                    <jats:sub>4<\/jats:sub>\n                    flux variability (&gt;\u200975%), with annual areal fluxes and reservoir\u2010wide emissions 44% higher during the drier year due to an earlier onset and longer duration of the high\u2010emission summer period. Near\u2010sediment temperature and water\u2010column depth were the primary predictors of seasonal CH\n                    <jats:sub>4<\/jats:sub>\n                    emissions, reflecting temperature controls on methanogenesis and hydrological regulation of ebullition. In contrast, CO\n                    <jats:sub>2<\/jats:sub>\n                    flux variability was dominated by diel processes, with wind speed emerging as the main predictor of short\u2010term emissions, while water depth and surface temperature regulated seasonal variability. For both gases, chlorophyll\u2010a was an important predictor at multiday timescales. Our results demonstrate that the temporal variability of GHG fluxes from Mediterranean reservoirs is highly sensitive to hydrologically mediated changes in lake water levels, particularly for methane. Under climate change, GHG emissions could increase significantly in Mediterranean regions, and potentially in other seasonally dry regions worldwide, as a result of projected trends towards stronger eutrophication and increases in drought frequency and duration. Our study underscores the value of long\u2010term, high\u2010frequency observations to improve emission estimates and to better represent reservoir processes in regional and global carbon cycle assessments.\n                  <\/jats:p>","DOI":"10.1111\/gcb.70979","type":"journal-article","created":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T08:01:44Z","timestamp":1783497704000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Drier Year Markedly Enhances Methane, but Not Carbon Dioxide, Emissions in a Mediterranean Reservoir"],"prefix":"10.1111","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5422-9917","authenticated-orcid":false,"given":"Cintia L.","family":"Ram\u00f3n","sequence":"first","affiliation":[{"name":"Department of Civil Engineering and Water Institute University of Granada  Granada Spain"},{"name":"Modeling Nature Research Unit University of Granada  Granada 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