INSUBCONTINENT EXCLUSIVE:
Beyond new daily heat record, the data also shows that 2023 was the hottest year ever recorded and that every calendar month for the past 13
July 21, the world had its hottest day on record
century of relatively widespread observations
when a record is broken, whether for a day, month or year
Beyond the new daily heat record, the data also shows that 2023 was the hottest year ever recorded and that every calendar month for the
amount of weather data that it uses to underpin its reanalysis
about weather conditions from around the world
temperature, wind, rain and snow information, as well as other factors like air pollution
Weather conditions like cloudy skies may also reduce the amount of data coming from sources like satellites
To fill these gaps, the scientists take the predictions they have already made, based on the long-term ERA5 model, and test them against the
That means a forecast that predicts a particular temperature in a particular place will be tested against all the data researchers receive
The model also accounts for any errors in the recorded data, and relies on the laws of physics, including the weather patterns, currents and
While their models differ slightly, the five groups have come to similar conclusions about record heat in recent months and
years.
Historical data is trickier to come by
The longest-running temperature series, the Central England Temperature in the UK, started in the 17th century
Data from before humans were systematically monitoring temperatures comes from sources like bubbles of gas trapped in glacial ice, or tree
hottest day on record, is on its way
This is partly because global mean temperatures usually peak between early July and early August
possible future scenarios
indicator of how rapidly the world is warming
