Dr Hugo Beltrami - Climate Change signals in the subsurface: Estimating continental heat storage

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Dr Hugo Beltrami, St. Francis Xavier U.

Mardi 13 avril 2021 à 12h30 - Tuesday, April 13, 2021 at 12:30 pm
Pour assister en vidéoconférence via Zoom: https://uqam.zoom.us/j/98489691028
Résumé / abstract:

Measurements of the energy exchanges among climate subsystems are of critical importance to determine the climate sensitivity of the Earth's system to greenhouse gases, to quantify the magnitude and evolution of the Earth's energy imbalance, and to project the evolution of future climate. Thus, ascertaining the magnitude and change of the Earth's energy partition within climate subsystems has become urgent in recent years. Here, we present some of our work leading to global estimates of ground surface temperature change and the land component of the Earth’s energy budget, derived from underground temperatures. Results reveal markedly higher changes in ground heat flux and heat storage within the continental subsurface than previously reported, with land temperature changes of 10 C and continental heat gains of around 12 ZJ (1ZJ=10 21 J) during the last part of the 20th century relative to preindustrial times. Continental heat storage represents about 5% of the total heat gain of the Earth system. Half of the heat-gain by the continental subsurface since 1960 has occurred in the last twenty years.

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Climate Change signals in the subsurface: Estimating continental heat storage

Ajouter au calendrier 2021-04-13 12:30:00 2021-04-17 06:48:34 Dr Hugo Beltrami - Climate Change signals in the subsurface: Estimating continental heat storage Measurements of the energy exchanges among climate subsystems are of critical importance to determine the climate sensitivity of the Earth's system to greenhouse gases, to quantify the magnitude and evolution of the Earth's energy imbalance, and to project the evolution of future climate. Thus, ascertaining the magnitude and change of the Earth's energy partition within climate subsystems has become urgent in recent years. Here, we present some of our work leading to global estimates of ground surface temperature change and the land component of the Earth’s energy budget, derived from underground temperatures. Results reveal markedly higher changes in ground heat flux and heat storage within the continental subsurface than previously reported, with land temperature changes of 10 C and continental heat gains of around 12 ZJ (1ZJ=10 21 J) during the last part of the 20th century relative to preindustrial times. Continental heat storage represents about 5% of the total heat gain of the Earth system. Half of the heat-gain by the continental subsurface since 1960 has occurred in the last twenty years. Geotop admin@example.com America/New_York public