Climate developments up until now
If we want to know if and how we are changing the climate, we first need to know how much it changes on its own. This is why old weather data is so valuable.
The oldest direct temperature measurements are from the 17th Century, but not until approx. 1860’ies do we have reliable measurements covering the entire globe.
The Danish Meteorological Institute was established in 1872, and it has since then monitored weather and climate in Denmark. Weather and climate monitoring is coordinated by the World Meteorological Organization (WMO) which is an agency within the UN. WMO sets standards and guidelines for this international cooperation which includes the global observation and communication systems. DMI contributes to the global observation network and participates in the international exchange of observational data.