Low frequency variability and trends in surface air temperature and humidity from ERA5 and other datasets
Title | Low frequency variability and trends in surface air temperature and humidity from ERA5 and other datasets |
Technical memorandum | |
Date Published | 02/2021 |
Secondary Title | ECMWF Technical Memoranda |
Number | 881 |
Author | |
Publisher | ECMWF |
Abstract | The ERA5 reanalysis of atmospheric and surface observations provides new estimates of low frequency variability and trends from 1950 onwards. Near-surface atmospheric values of temperature and humidity are considered here. They are compared with corresponding values from two earlier reanalyses, ERA-Interim and JRA-55, and with other observationally based estimates. Topics covered include global trends and the fits of ERA5 and ERA-Interim to land-station data, sea-surface and marine-air temperatures, estimates of actual global temperatures, regional variations of actual temperatures over land and sea-ice, trends and variability of monthly temperature anomalies from multiple datasets, and some local issues for ERA5. The discussion of relative humidity is shorter, but covers many of the same lines. |
URL | https://www.ecmwf.int/en/elibrary/81213-low-frequency-variability-and-trends-surface-air-temperature-and-humidity-era5 |
DOI | 10.21957/ly5vbtbfd |