The heat flux data for geocryological monitoringтезисы доклада

Дата последнего поиска статьи во внешних источниках: 26 декабря 2017 г.

Работа с тезисами доклада


[1] The heat flux data for geocryological monitoring / V. Ostroumov, D. Fedorov-Davydov, A. Koloskov et al. // International Conference Earth's Cryosphere: Past, Present and Future (June 4-8, 2017, Pushchino, Russia). Program and conference materials. — 2017. — P. 43–44. Obtained data show the dynamics of intensity and direction of the heat flux in soils. They reflect daily, annual or long-term changes of the thermal state of soil massif, depending of the depth of heat flux sensor and measure period. Effective heat capacity and thermal conductivity of the soil was calculated using the temperature and heat flux intensity data. The equation of heat balance for soil layer was used to estimate the effective heat capacity of soil. The heat conduction equation was used to calculate the effective thermal conductivity of the soil. The calculated average value of the effective thermal conductivity is 1.4 W/(m*K) at the first monitoring point. The effective thermal conductivity varies from 1.1 W/(m*K) to 1.9 W/(m*K) here. Effective heat capacity averages 2.2 kJ/(kg*K) and varies from 0.3 kJ/(kg*K) to 8.1 kJ/(kg*K). Similar amplitude fluctuations of effective thermophysical coefficients were found at other monitoring Sites. We explain the observed changes in the effective soil thermal conductivity and heat capacity by the heat effects of processes inside soil massif such as phase transitions during freezing and thawing, evaporation and condensation, convection of mobile phases, also by heat effects of chemical reactions, interfacial interactions, and biochemical transformations. The obtained data allowed us to improve any design features the system for soil heat flux monitoring. The results show the feasibility of the using the heat flux data for the geocryological monitoring.

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