Ice formation on lake surfaces in winter causes warm-season bias of lacustrine brGDGT temperature estimates

Cao, Jiantao; Rao, Zhiguo; Shi, Fuxi; Jia, Guodong

doi:https://doi.org/10.5194/bg-17-2521-2020

Articles | Volume 17, issue 9

https://doi.org/10.5194/bg-17-2521-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-2521-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 9

Research article

|

12 May 2020

Research article |

| 12 May 2020

Ice formation on lake surfaces in winter causes warm-season bias of lacustrine brGDGT temperature estimates

Jiantao Cao, Zhiguo Rao, Fuxi Shi, and Guodong Jia

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https://doi.org/10.5194/bg-17-2521-2020-supplement

Data sets

Ice formation on lake surface in winter causes warm season bias of lacustrine brGDGT temperature estimates Jiantao Cao, Zhiguo Rao, Fuxi Shi, and Guodong Jia https://doi.org/10.6084/m9.figshare.11422743

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Short summary

BrGDGT distribution in Gonghai Lake is different from surrounding soils, and its derived temperature reflects a mean annual lake water temperature (LWT) that is higher than the mean annual air temperature (AT). The higher mean annual LWT is due to ice formation in winter that prevents thermal exchange between lake water and air.