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The important role of soil moisture for the environment and climate system is well known. Soil moisture influences hydrological and agricultural processes, runoff generation, drought development and many other processes. It also impacts on the climate system through atmospheric feedbacks. Soil moisture is a source of water for evapotranspiration over the continents, and is involved in both the water and the energy cycles. Soil moisture was recognised as an Essential Climate Variable (ECV) in 2010. 



Soil moisture anomalies for the year 2019 derived from the ESA CCI COMBINED v05.2 product.

The Soil Moisture CCI project is part of the ESA Programme on Global Monitoring of Essential Climate Variables (ECV), better known as the Climate Change Initiative (CCI), initiated in 2010 and producing an updated soil moisture product every year. The ESA CCI Soil moisture product has contributed to hundreds of hydrological and climatological studies worldwide, as well as the annual BAMS' "State of the Climate" reports. 

CCI Soil Moisture produces:

  • Annually algorithmically updated global climate data record of soil moisture spanning over 40 years.
  • 3 separate soil moisture products derived from active, passive and combined (active + passive) sensors.
  • 10 public releases to date, each updated with new sensors and extended time series.

The dataset ingests soil moisture datasets derived from the sensors listed in the figures below. In particular, the following datasets are used (at ESA CCI SM v05.2):

ESA CCI soil moisture v05.2 product utilizes 4 active and 8 passive microwave sensors.

Merging scheme of the ESA CCI SM v5 algorithm. For more information on the product generation please refer to the product documentation.