Woolway, RI; Jones, ID; Maberly, SC; French, JR; Livingstone, DM; Monteith, DT; Simpson, GL; ... Weyhenmeyer, GA; + view all Woolway, RI; Jones, ID; Maberly, SC; French, JR; Livingstone, DM; Monteith, DT; Simpson, GL; Thackeray, SJ; Andersen, MR; Battarbee, RW; DeGasperi, CL; Evans, CD; de Eyto, E; Feuchtmayr, H; Hamilton, DP; Kernan, M; Krokowski, J; Rimmer, A; Rose, KC; Rusak, JA; Ryves, DB; Scott, DR; Shilland, EM; Smyth, RL; Staehr, PA; Thomas, R; Waldron, S; Weyhenmeyer, GA; - view fewer (2016) Diel Surface Temperature Range Scales with Lake Size. PLOS One , 11 (3) , Article e0152466. 10.1371/journal.pone.0152466.

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Abstract

Ecological and biogeochemical processes in lakes are strongly dependent upon water temperature. Long-term surface warming of many lakes is unequivocal, but little is known about the comparative magnitude of temperature variation at diel timescales, due to a lack of appropriately resolved data. Here we quantify the pattern and magnitude of diel temperature variability of surface waters using high-frequency data from 100 lakes. We show that the near-surface diel temperature range can be substantial in summer relative to long-term change and, for lakes smaller than 3 km2, increases sharply and predictably with decreasing lake area. Most small lakes included in this study experience average summer diel ranges in their near-surface temperatures of between 4 and 7°C. Large diel temperature fluctuations in the majority of lakes undoubtedly influence their structure, function and role in biogeochemical cycles, but the full implications remain largely unexplored.

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