The quality of lake ice is of uppermost importance for ice safety and under-ice ecology, but its temporal and spatial variability is largely unknown. Here we conducted a coordinated lake ice quality sampling campaign across the Northern Hemisphere during one of the warmest winters since 1880 and show that lake ice during 2020/2021 commonly consisted of unstable white ice, at times contributing up to 100% to the total ice thickness. We observed that white ice increased over the winter season, becoming thickest and constituting the largest proportion of the ice layer towards the end of the ice cover season when fatal winter drownings occur most often and light limits the growth and reproduction of primary producers. We attribute the dominance of white ice before ice-off to air temperatures varying around the freezing point, a condition which occurs more frequently during warmer winters. Thus, under continued global warming, the prevalence of white ice is likely to substantially increase during the critical period before ice-off, for which we adjusted commonly used equations for human ice safety and light transmittance through ice

Weyhenmeyer, G.A.; Obertegger, U.; Rudebeck, H.; Jakobsson, E.; Jansen, J.; Zdorovennova, G.; Bansal, S.; Block, B.D.; Carey, C.C.; Doubek, J.P.; Dugan, H.; Erina, O.; Fedorova, I.; Fischer, J.M.; Grinberga, L.; Grossart, H.; Kangur, K.; Knoll, L.; Laas, A.; Lepori, F.; Meier, J.; Palshin, N.; Peternell, M.; Pulkkanen, M.; Rusak, J.A.; Sharma, S.; Wain, D.; Zdorovennov, R. (2022). Towards critical white ice conditions in lakes under global warming. NATURE COMMUNICATIONS, 13: 4974. doi: 10.1038/s41467-022-32633-1 handle: http://hdl.handle.net/10449/76535

Towards critical white ice conditions in lakes under global warming

Obertegger, U.;
2022-01-01

Abstract

The quality of lake ice is of uppermost importance for ice safety and under-ice ecology, but its temporal and spatial variability is largely unknown. Here we conducted a coordinated lake ice quality sampling campaign across the Northern Hemisphere during one of the warmest winters since 1880 and show that lake ice during 2020/2021 commonly consisted of unstable white ice, at times contributing up to 100% to the total ice thickness. We observed that white ice increased over the winter season, becoming thickest and constituting the largest proportion of the ice layer towards the end of the ice cover season when fatal winter drownings occur most often and light limits the growth and reproduction of primary producers. We attribute the dominance of white ice before ice-off to air temperatures varying around the freezing point, a condition which occurs more frequently during warmer winters. Thus, under continued global warming, the prevalence of white ice is likely to substantially increase during the critical period before ice-off, for which we adjusted commonly used equations for human ice safety and light transmittance through ice
Settore BIO/07 - ECOLOGIA
Weyhenmeyer, G.A.; Obertegger, U.; Rudebeck, H.; Jakobsson, E.; Jansen, J.; Zdorovennova, G.; Bansal, S.; Block, B.D.; Carey, C.C.; Doubek, J.P.; Dugan, H.; Erina, O.; Fedorova, I.; Fischer, J.M.; Grinberga, L.; Grossart, H.; Kangur, K.; Knoll, L.; Laas, A.; Lepori, F.; Meier, J.; Palshin, N.; Peternell, M.; Pulkkanen, M.; Rusak, J.A.; Sharma, S.; Wain, D.; Zdorovennov, R. (2022). Towards critical white ice conditions in lakes under global warming. NATURE COMMUNICATIONS, 13: 4974. doi: 10.1038/s41467-022-32633-1 handle: http://hdl.handle.net/10449/76535
File in questo prodotto:
File Dimensione Formato  
2022 NC Obertegger.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 3.13 MB
Formato Adobe PDF
3.13 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/76535
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact