Fluxo de calor, fusão do gelo e nível do mar

• Main Author: Duque, Maria Rosa
• Format: Article in Journal/Newspaper
• Language: Portuguese
• Published: APMG-Associação Portuguesa de Meteorologia e Geofísica 2016
• Subjects: Fluxo de calor; Fusão de gelos; nível do mar; Greenland; West Antarctica; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10174/19716

The recent values of heat flow data obtained for Greenland and West Antarctica are higher than it was supposed. In West Antarctica, values higher than 200mW/m2were found (Schroeder et al,2014) and in Greenland, values higher than 140 mW/m2 were detected in the Central part (Petrunin et al,2013). Thermal conductivity values of ice are relatively low at atmospheric pressure. This means that if we consider heat flowing by conduction, near the surface of the globe, with this heat flow values, the thermal gradients mill be elevated. A possible reason presented for the high heat flow values in Greenland is the existence of a thin lithosphere. The study of the ice melting near the poles is related with the changes in sea level. Obtaining this parameter is difficult. The time interval with measurement is not enough to obtain clear information about the past.The spatial distribution of heat flow shows clearly zones in the oceans with high values. How can this heat influence water movements in that regions and the temperature in the oceans?