This is to detail the work of @morobking and @axel-lauer for work package 4.2 of CMUG Phase 2.

Outline

Starting with the LST_CCI dataset the updated methodology in the latest dataset version will be examined and updates to ESMValTool applied. Additional uncertainty information will be implemented into the ESMValTool alongside already existing ECVs from ESA CCI datasets. In order to make scientific use of this uncertainty information, possibilities to propagate uncertainty information to the spatial and temporal scales used by the models will be investigated. As a starting point, work done on implementing uncertainty information for the CCI LAND SURFACE TEMPERATURE will be used (Mittaz et al., 2019). Mittaz et al. (2019) set up the uncertainty propagation equations using matrices and give a generic platform for the propagation dependent on the error covariance matrix. This approach is expected to work for LST and SST. It will then be investigated in a case-by-case study if an extension to selected other ECVs is possible. This work will be done in close collaboration with a relevant identified expert from the University of Reading (Claire Bulgin, LST_CCI) subcontracted through the Met Office and with selected ECV projects.