Mackay, E.B. et al

Cumbrian Lakes Monitoring thermal stratification timing 1951-2017

The dataset contains the day of year for the onset and end of thermal stratification and its total length in Blelham Tarn, Esthwaite Water, Windermere, north basin and Windermere, south basin between 1951 and 2017.

This work was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability.

Publication date: 2021-03-19


Study area
Temporal extent
1951-01-01    to    2017-12-31

Provenance & quality

The data were calculated from temperature profiles taken in each lake at the deepest point, using a calibrated temperature-oxygen sensor. Water temperatures were converted to density and the lake was considered stratified when the density gradient between the surface and bottom of the lake was >0.1 kg m-3. The start day of the main summer stratified period was considered to be the latest day before day of year 200 where a stratified period had a duration >14 days, the end day was defined as the final day of stratification for that stratified period and the duration calculated as the difference between these two days. More detail on the method used can be found in the supporting documentation.

Correspondence/contact details

Dr. Ellie Mackay
UK Centre for Ecology & Hydrology
Lancaster Environment Centre, Library Avenue, Bailrigg


Mackay, E.B.
UK Centre for Ecology & Hydrology
Clarke, M.A.
UK Centre for Ecology & Hydrology
Dodd, B.A.
UK Centre for Ecology & Hydrology
Feuchtmayr, H.
UK Centre for Ecology & Hydrology
Fletcher, J.M.
UK Centre for Ecology & Hydrology
James, J.B
UK Centre for Ecology & Hydrology
Maberly, S.C.
UK Centre for Ecology & Hydrology
Rhodes, G.
UK Centre for Ecology & Hydrology
Thackeray, S.J.
UK Centre for Ecology & Hydrology

Other contacts

NERC EDS Environmental Information Data Centre
NERC Environmental Information Data Centre
Rights Holder
UK Centre for Ecology & Hydrology

Additional metadata

Topic categories
Inland Waters , Environment
Biodiversity Biodiversity Climate indicator,  Cumbrian Lakes Monitoring,  Lakes,  Lakes Monitoring Long term change,  Stratification duration,  Stratification onset,  Stratification overturn,  Thermal stratification,  UK-SCAPE,  United Kingdom,  Water Water quality Water quality and resources
Environmental Monitoring Facilities
Natural Environment Research Council Award: NE/R016429/1
Spatial representation type
Tabular (text)
Spatial reference system
OSGB 1936 / British National Grid
Last updated
18 May 2022 12:29