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On long-term variations in the Earth’s surface temperature

Authors

Dobrica,  Venera
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Demetrescu,  Crisan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Stefan,  Cristiana
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Dobrica, V., Demetrescu, C., Stefan, C. (2023): On long-term variations in the Earth’s surface temperature, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3239


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020356
Abstract
We analyze the Earth’s surface temperature recorded at available 7 european meteorological stations with 300 years-long activity. We detect variations at several time scales, present in these recordings, namely decadal, inter-decadal (20-30 years), and sub-centennial (60-90 years). These are corelatable with the solar activity variations at the same time scales, indicating a source - effects relationship between the solar input and the air surface temperatures. First, the decadal variations, of amplitudes of ~1° C, are separated from a trend by a Hodrick and Prescott (1997) type analysis, then the inter-decadal and the sub-centennial variations (of several tenths and, respectively, ~1° C amplitude) are separated from the trend by Butterworth (1930) filtering. The analysis is coroborated with similar ones applied to (1) the Danube river discharge as an integrator of temperature and precipitation in the Central Europe and (2) to solar activity monitored or reconstructed parameters.