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Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

by Hambright, K. David , Lepori, Fabio , Knoll, Lesley , Korhonen, Johanna , Pierson, Don , Leavitt, Peter , Gaiser, Evelyn , Havens, Karl , Straile, Dietmar , Huuskonen, Hannu , Vinebrooke, Rolf , Pilla, Rachel , Sitoki, Lewis , Müller-Navarra, Dörthe , Colom-Montero, William , Pislegina, Helen , Silow, Eugene , Isles, Peter , Rogora, Michela , Maberly, Stephen , Zadereev, Egor , Hessen, Dag , Higgins, Scott , Hamilton, David , Kraemer, Benjamin , Sadro, Steven , Rusak, James , Adamovich, Boris , Schmid, Martin , Verburg, Piet , Huttula, Timo , Jones, Ian , Melles, Stephanie , Schindler, Daniel , Saulnier-Talbot, Émilie , Weyhenmeyer, Gesa , Sommaruga, Ruben , Dix, Margaret , Plisnier, Pierre-Denis , Salmaso, Nico , Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) ; Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG) , Luger, Martin , Anneville, Orlane , Dokulil, Martin , Saros, Jasmine , St

in 704/106/286 / 704/158/2459 / 704/286 / Air temperature / Anthropogenic factors / Aquatic sciences & oceanology / Humanities and Social Sciences / Lakes / Life Sciences / multidisciplinary / Science / Science (multidisciplinary) / Sciences aquatiques & océanologie / Sciences du vivant / Surface temperature / Surface water / Thermal stability / Trends / Water column / Water temperature

2020

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2020

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2020

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Journal Article

Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

Hambright, K. David,

Lepori, Fabio,

Knoll, Lesley,

Korhonen, Johanna,

Pierson, Don,

Leavitt, Peter,

Gaiser, Evelyn,

Havens, Karl,

Straile, Dietmar,

Huuskonen, Hannu,

Vinebrooke, Rolf,

Pilla, Rachel,

Sitoki, Lewis,

Müller-Navarra, Dörthe,

Colom-Montero, William,

Pislegina, Helen,

Silow, Eugene,

Isles, Peter,

Rogora, Michela,

Maberly, Stephen,

Zadereev, Egor,

Hessen, Dag,

Higgins, Scott,

Hamilton, David,

Kraemer, Benjamin,

Sadro, Steven,

Rusak, James,

Adamovich, Boris,

Schmid, Martin,

Verburg, Piet,

Huttula, Timo,

Jones, Ian,

Melles, Stephanie,

Schindler, Daniel,

Saulnier-Talbot, Émilie,

Weyhenmeyer, Gesa,

Sommaruga, Ruben,

Dix, Margaret,

Plisnier, Pierre-Denis,

Salmaso, Nico,

Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL) ; Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG),

Luger, Martin,

Anneville, Orlane,

Dokulil, Martin,

Saros, Jasmine,

2020

Overview

Globally, lake surface water temperatures have warmed rapidly relative to air temperatures, but changes in deepwater temperatures and vertical thermal structure are still largely unknown. We have compiled the most comprehensive data set to date of long-term (1970-2009) summertime vertical temperature profiles in lakes across the world to examine trends and drivers of whole-lake vertical thermal structure. We found significant increases in surface water temperatures across lakes at an average rate of+0.37 degrees C decade(-1), comparable to changes reported previously for other lakes, and similarly consistent trends of increasing water column stability (+0.08 kg m(-3) decade(-1)). In contrast, however, deepwater temperature trends showed little change on average (+0.06 degrees C decade(-1)), but had high variability across lakes, with trends in individual lakes ranging from -0.68 degrees C decade(-1) to+0.65 degrees C decade(-1). The variability in deepwater temperature trends was not explained by trends in either surface water temperatures or thermal stability within lakes, and only 8.4% was explained by lake thermal region or local lake characteristics in a random forest analysis. These findings suggest that external drivers beyond our tested lake characteristics are important in explaining long-term trends in thermal structure, such as local to regional climate patterns or additional external anthropogenic influences.

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Publisher

Nature Publishing Group,CCSD,Nature Publishing Group UK,Nature Research,Nature Portfolio

Subject

704/106/286

/ 704/158/2459

/ 704/286

/ Air temperature

/ Anthropogenic factors

/ Aquatic sciences & oceanology

/ Humanities and Social Sciences