GNGTS 2019 - Atti del 38° Convegno Nazionale

230 GNGTS 2019 S essione 1.4 Panza, G.F., Peresan, A., Sansò, F. et al. (2017). How geodesy can contribute to the understanding and prediction of earthquakes, Rend. Fis. Acc. Lincei, pp. 13. https://doi.org/10.1007/s12210-017-0626-y Piscini A., De Santis A., Marchetti D. and Cianchini G., (2017). A multi-parametric climatological approach to study the 2016Amatrice-Norcia (Central Italy) earthquake preparatory phase, Pure appl. Geophys., 174, 10, 3673-3688. Piscini A., Marchetti D. De Santis A., (2019). Multi-parametric climatological analysis associated with global significant volcanic eruptions during 2002–2017. Pure appl. Geophys., https://doi.org/10.1007/s00024-019- 02147-x Pulinets S., & Ouzounov, D., (2011). Lithosphere‑Atmosphere‑ ionosphere coupling (LAIC) model‑an uni ed concept for earthquake precursors validation. Journal of Asian Earth Sciences, 41(4–5), 371–382. COULD THE ENORMOUS INCREASE OF TEMPERATURE IN THE NORTHERN POLAR REGION BE PARTIALLY CAUSED BY MAGNETIC POLE WANDERING? V. Marchitelli 1,2 , P. Harabaglia 2 , G. De Natale 3 , C. Troise 3 1 Try-Moon, Puglia, Italy 2 Scuola di Ingegneria, Università della Basilicata, Italy 3 Istituto Nazionale di Geofisica e Vulcanologia, Italy The global warming theme is probably the most debated one worldwide. Its effects are so obvious that at the moment the only open questions are relative to its origin. Most scientists tend to believe that it is caused by human activities, even though, quite recently, Zharkova et al. (2019) have shown that the average increase in total solar radiation that we observed in the last 2 centuries would be enough to explain the global temperature increase that the whole world is worrying about. We will not debate this issue, since our aim is to address a slightly different problem, namely the strong effect of current global warming on the northern polar cap. As an example, according to NASA, in the time interval 2002-2017, the average annual ice loss measured by the GRACE satellite in Greenland has been 2.86x10 14 kg/yr while in the whole Antarctic Continent it has been only 1.27x10 14 kg/yr. Moreover in Fig. 1 and Fig. 2 we show the limit at the moment of minimum extension of ice caps in 1979 (Green line) and 2018 (Yellow line) according to NSIDC. It is rather evident the Antarctic Cap has been only slightly affected, while the Arctic one has been severely reduced. In the past few thousands years average temperatures in the known world of the time (that is where we have historical or at least archaeological records) have risen and fallen several times. A brief description of these phenomena can be found in Zharkova et al. (2019). We did not find however any scientific paper that could convincingly prove that, during the warm periods of the past millennia, the Northern Polar Cap was affected in a manner similar to what we are currently observing. The lack of evidence is not a proof but could still give us a clue. Let us suppose that it is the first time in the human history that during a warm period the Northern Pole region becomes so warm. This means that we should look for some unusual phenomenon. Pollution does not seem a reasonable answer. It is true that greenhouse gases are mostly produced in the northern hemisphere but there is no clear reason why they should concentrate their effect mostly on the polar region. We think that beside the actual global warming, that is affecting the whole planet, a completely different phenomenon must be reinforcing it in the Northern Pole area. A somewhat correlated observation is the fast shift of the Northern Magnetic Pole that in the last 30 years has greatly accelerated, moving by almost 1500 km to the North. Conversely, the Southern Magnetic pole has moved in the same time interval by less than 200 km. In Fig. 1 and Fig. 2 we show the modeled polar positions, since 1590, according to NOAA. It is remarkable that