Climate change Borehole temperature Geothermal gradient Eastern Morocco
Ground surface temperature history (GSTH) reflecting the past climate conditions in eastern Morocco was
evaluated by analyzing the temperature–depth profiles measured in four boreholes at the Figuig Oasis.
The temperature–depth data were inverted using the functional space inversion method in order to
reconstruct the surface temperature past changes. The results reveal a recent warming in the last century
with an amplitude of 1–3 C for the four boreholes and a comparison with surface air temperature (SAT)
variation from the Bouarfa and Bechar meteorological stations confirms this result. This warming trend is
confirmed by other climate proxies.