Statistics – Methodology
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3385b&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 20, p. 3385-3388
Statistics
Methodology
10
Global Change, Global Change: Climate Dynamics, Global Change: Solid Earth, Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions
Scientific paper
The heat exchange at the air/ground interface is determined by many complex processes making the energy balance at the earth's surface extremely difficult to quantify and model. A new methodology allows heat flux at the Earth's surface to be estimated using ground surface temperature history reconstructed from geothermal data. We found that over a large region in eastern and central Canada, the average heat flux into the ground during the last 1000 years was on the order of 2.8 mWm-2. Our results suggest that significant change in the ground heat flux occurred in the last two centuries. The 200 years averaged heat flux since 1765 is 17.0 mWm-2, while the average heat flux over the latest 100 years is 74.0 mWm-2. The sensitivity of the subsurface to very small energy imbalances makes these type of data and analysis useful complements to the paleoclimatic record; they also provide constrains for general circulation model land-surface parameterization over a wide range of spatial-temporal scales.
Beltrami Hugo
Bras Rafael L.
Wang Jingfeng
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