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Warming of near-surface summer water temperatures in Lakes of the Conterminous United States

Bachmann Roger W., Canfield Daniel E., Sharma Sapna et Lecours Vincent. (2020). Warming of near-surface summer water temperatures in Lakes of the Conterminous United States. Water, 12, (12), e3381.

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URL officielle: http://dx.doi.org/doi:10.3390/w12123381

Résumé

Because warming water temperatures have widespread consequences for freshwater communities, we were interested in estimating the patterns and rates of change of near-surface summer water temperatures in United States lakes. We developed multiple regression models to relate daily surface water temperatures in lakes of the conterminous United States to 8-day average air temperatures, latitude, elevation, and sampling month and year using data from 5723 lake samples in the months of June-September during the period 1981–2018. Our model explained 79% of the variation with a root-mean-square error of 1.69 °C. We predicted monthly average near-surface water temperatures for 1033 lakes for each year from 1981 through 2018. Lakes across the conterminous United States have been warming for the period 1981–2018 at an average heating rate of 0.32 °C per decade for the summer months (June–September). The average summer warming from 1981–2018 would be the equivalent of a lake decreasing 259 m in elevation or moving 233 km south. On the basis of national air temperatures starting in 1895, it was inferred that lake water temperatures are variable from year to year and have been steadily increasing since 1964, but that maximum temperatures in the 1930s were just as warm as those in 2008–2018.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:2073-4441
Volume:12
Numéro:12
Pages:e3381
Version évaluée par les pairs:Oui
Date:2 Décembre 2020
Nombre de pages:1
Identifiant unique:10.3390/w12123381
Sujets:Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie
Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences humaines
Mots-clés:climate change, lake heating, air–water temperatures, heating rates of lakes, hindcasting temperatures, lake temperature models, conterminous United States
Déposé le:30 oct. 2023 19:30
Dernière modification:31 juill. 2024 15:45
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