Copernicus Global Land Service (CGLOPS) - WATER

Lake Surface Water Temperature

The CGLOPS Lake Water provides an optical and thermal characterization of nominally 1000 inland water bodies (listed in CGLOPS Lakes) that belong to the world's largest, according to the Global Lakes and Wetlands Database (GLDW) or are otherwise of specic environmental monitoring interest. From March 2024, the set of 2024 inland water bodies from ESA CCI LAKES replaces the set of 1000 lakes. The CGLOPS products contain four sets of parameters:

• lake water surface temperature
• lake water reflectance (all wavebands that are available after atmospheric correction)
• turbidity (derived from suspended solids concentration estimates)
• trophic state index (derived from phytoplankton biomass by proxy of chlorophyll-a)

This site is dedicated to the University of Reading contribution to the CGLOPS programme, which is the lake surface water temperatures (LSWT).

Production and delivery of the lake surface water temperature together with its unceratinty are over 10-day intervals (starting the 1st, 11th and 21st day of each month) and mapped to a common global grid at nominally 1000m (1/120 deg) resolution.

A summary of the C-GLOPS LSWT products is reported in the table below.

Sensor	Version	Type	Period Covered	Lakes
AATSR	v1.0.2	historical	11-May-2002 to 01-Apr-2012	~1000
SLSTR-A	v1.0.1	NRT	10-Apr-2018 to 20-Aug-2020*	~1000
SLSTR-A	v1.0.2	reprocessed	01-Jun-2016 to 30-Apr-2020	~1000
SLSTR-A + SLSTR-B	v1.1.0	NRT (3-day latency)	21-Aug-2020 to 29-Feb-2024	~1000
SLSTR-A + SLSTR-B	v1.2.0	NRT (3-day latency)	01-Mar-2024 to current	~2000

*NRT data between 10-Apr-2018 and 30-Apr-2020 has now been reprocessed and is no longer available. Please use the SLSTR-A reprocessed data (v1.0.2) instead.

Detailed information together with the data documentation can be found at the official CGLOPS website where the data can be downloaded.