| The last five hundred. years of mean decadal surface temperature is reconstructed from borehole temperature profiles using Singular Value Decomposition Inversion (SVDI). For this study, forty-two temperature versus depth profiles were obtained. from boreholes located north of 60 degrees North latitude. Inverted borehole temperature profiles show a regional general trend of approximately 1K increase in surface air temperature, except in the Canadian Islands region where results show 3K warming. Knowledge about the regional climate during the recent past plays a crucial role in estimating future climate and offers insight into pre-instrumental climate variability. For this reason, the evaluation of past surface air temperature trends inferred from geothermal data should be included. in General Circulation Models (GCM) to improve projections of future climate variations and to tune climate reconstruction models. |
