The World Meteorological Organization released its Statement on the State of the Global Climate for
2019 this week (10 March) to outline the signs and impacts of climate change in the atmosphere, land and oceans. Data from ESA CCI were highlighted from the CCI Sea Level project and in a sea ice product citing CCI Sea Ice.
The report highlights low sea ice extent in its key messages alongside high mean global temperature, record high levels for ocean heat content and atmospheric concentrations of greenhouse gases, and the recent acceleration in global mean sea level.
2019 was the second warmest year in the instrumental record, with global average air temperature at 1.1°C above estimated pre-industrial levels, second only to the record set in 2016 due to a strong El Niño event.
Atmospheric concentrations of greenhouse gases were summarized for 2018: these have reached new highs, with globally averaged mole fractions of carbon dioxide (CO2) at 407.8±0.1 parts per million (ppm), methane (CH4) at 1869±2 parts per billion (ppb) and nitrous oxide (N2O) at 331.1±0.1 ppb. Preliminary data indicates that greenhouse gas concentrations continued to increase in 2019.
The report highlights sea level rise and melting sea ice, as well as indicators of ocean acidification and dissolved oxygen, heatwaves and droughts, wildfires, precipitation and flooding, severe storms, ice sheet loss, marine ecosystems, impacts on health, migration, displacement and hunger. 
Caption: Global mean sea-level evolution from high-precision altimetry
The WMO issues a Statement on the State of the Global Climate every year. The report confirms information in a provisional statement issued at the UN Climate Change Conference in December, including that 2015-2019 are the five warmest years on record, and 2010-2019 the warmest decade on record. Since the 1980s, each successive decade has been warmer than any preceding decade since 1850.
ESA’s Climate Change Initiative is a research and development programme that merges and calibrates measurements from multiple satellite missions to generate a global time-series looking at 21 key components of the climate system. Spanning decades, these long-term data records enable scientists to identify climate trends, develop and test Earth system models that predict future change and inform decision-makers to mitigate and adapt to the impacts.
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