We compare CCI and GLEAM soil moisture products over two regions which will help understanding the mechanisms of some systematic biases in the model simulations of soil moisture and evaporation. These regions are:
- Western Europe (32 in the figure)
- the western part of the Mediterranean basin (34 in the figure)
The overall aim of our study is to validate the soil moisture predicted by the LMDZOR model against the CCI soil moisture product (reference data set for the validation). LMDZOR results from the coupling of the atmospheric model LMDZ and the land-surface model ORCHIDEE.
As other soil moisture products exist (e.g. GLEAM product), we wish to check if the different soil moisture products are in agreement, before validating our model.
According to the figure, there are some differences between the two products. The histogram of GLEAM data present a wider range of soil moisture values compared to the one of the CCI data. This is particularly true in dry context, i.e. during the dry season (boreal summer) and semi-arid regions. Thus we have to be careful when we validate climate models and we try to find a better method of validation.