Baseline for ‘normal’ weather needs to be updated due to climate change, says UN agency

Blue and Green: The World Meteorological Organisation`s (WMO) Commission for Climatology has said the current baselines for weather are out of date and must be updated more frequently due to the impacts of global warming. Currently, the official existing baseline is based on climate averages of 1961-1990 and is only updated once every 30 years. During this time weather variables such as temperature rises and rainfall are measured and ‘climate normals’ are created from the averages. These averages can be calculated......

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