Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Przegląd Geofizyczny

1 2001

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: surface ground

Sortuj według:

Ogranicz wyniki do:

Rekonstrukcja zmian temperatury powierzchni gruntu w Polsce w ostatnim 500-leciu na podstawie profili geotermicznych

Majorowicz J., Šafanda J., Przybylak R., Wójcik G.

Przegląd Geofizyczny

2001

Z. 4

305-321

Reconstruction of the ground surface temperature history in Poland was derived from the in-version of the temperature profiles with depth in over 20 wells. Temperature histories for the period 1500 A.D. till 1977 A.D. agree well with instrumental record of the surface air temperature available for the last two centuries. We are observing large warming since early 19th century of the magnitude of 0.6-0.9°C preceded by a colder climate since 1500 A.D. interrupted by a warmer one with a local maximum in the 1700 A.D. The climatic reconstructions based on the deepest wells (> 470 m depth) show very god correlation among groups of wells. The statistical correlation of the reconstructed histories (from the well temperature data) with the instrumental record (air temperature) from the homogeneous Warsaw series is very high. Statistical correlation coefficient as high as 0.9 is seen for some groups of wells. Geothermal data and their inversion is the only direct physical method to determine the value of warming/cooling events in the past. This is done without the need of calibration based on the correlation with the present air surface temperature record as needed for the proxy reconstructions (tree rings etc