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State of the Climate report features CCI datasets

An authoritative review of the world’s climate highlights ESA Climate Change Initiative datasets in a number of key climate indicators.  

The annual ‘State of the Climate’ report, led by NOAA’s Center for Weather and Climate, is an international, peer-reviewed publication of the Bulletin of the American Meterological Society (BAMS).

The September 2019 edition cites CCI Soil Moisture, Cloud, and Ozone in its broad analysis of how climate around the globe has changed over the past 12 months compared with the preceding decades. 

The report’s authors use the CCI Soil Moisture dataset v04.5 COMBINED to examine changes in global soil moisture, noting that areas affected by dry conditions expanded in 2018 compared to 2017, notably around 30 degrees south (Australia and South Africa).  

The dataset combines observations from seven passive and four active microwave satellite instruments into a single, harmonized dataset from November 1978-December 2018, with “reduced uncertainties and data gaps compared to the single sensor products,” say the report authors. “It has been validated against both land surface models and in situ measurements and has been widely used for a range of applications”. 

The authors use Cloud CCI AVHRR-PMv3.0 data alongside other global cloud datasets to describe annual global cloud anomalies (1980-2018) and annual actual global cloudiness as a percentage. Average annual cloudiness is relatively stable with a small increase in 2018 compared to 2017. 

CCI Ozone, a merged total ozone dataset from long-term GOME/SCIAMACHY/GOME2 data, is used alongside other datasets to discuss mean annual ozone anomalies in the Earth’s stratosphere. 

Christian Retscher, ESA technical officer for CCI Ozone, highlighted the unique length and instrument combination of the CCI Ozone dataset. He said its use in the BAMS report “is a credit to the team efforts in producing it.” 

The report also draws on Copernicus Climate Change Service (C3S) data for lake surface temperature. 


Blunden, J. and D. S. Arndt, Eds., 2019: State of the Climate in 2018. Bull. Amer. Meteor. Soc., 100 (9), Si–S305, doi:10.1175/2019BAMSStateoftheClimate.1.