NASA’s finding combines millions of observations from instruments on land, at sea, in the air and on satellites with atmospheric models. Its GEOS-FP system supplies near-real-time weather data; the MERRA-2 climate reanalysis takes longer and uses the best-quality observations. [S1]

July 21 and 23, 2024, also exceeded the previous global daily temperature record, set in July 2023. NASA says the records are part of a long-term warming trend driven by human activity, primarily greenhouse gas emissions. Its results broadly agree with an independent analysis by the European Union’s Copernicus Earth Observation Programme, despite small differences. [S1]

The daily records followed 13 consecutive monthly temperature records, according to scientists at NASA’s Goddard Institute for Space Studies. Their GISTEMP record uses surface instrument data to track monthly and annual global temperature changes back to the late 19th century. [S1]

Source documents

  1. NASA Data Shows July 22 Was Earth’s Hottest Day on Recordhttps://www.nasa.gov/earth/nasa-data-shows-july-22-was-earths-hottest-day-on-record/