Modeling the spatial structure of thermokarst lake fields in the cryolithozone of Northern Eurasia accounting lognormal law of their size distribution

[摘要] Power and exponential lake size distributions are now routinely used for modeling the spatial structure of thermokarst lake fields. Based on a combination of satellite images of moderate and high spatial resolution, a synthesized lake size distribution histogram is constructed, which is approximated by a lognormal distribution law using the Pearson criterion with a probability of 0.99. This distribution law takes into account small lakes which are considered as intensive sources of methane emission into the atmosphere from thermokarst lakes. Based on a geo-simulation approach, a model of the spatial structure of thermokarst lake fields is proposed taking into account the lognormal lake size distribution. Algorithms for modeling the spatial structure of thermokarst lake fields are presented. An example of modeling a field of thermokarst lakes with a lognormal lake size distribution is given.

[发布机构] Institute of Monitoring of Climatic and Ecological Systems SB RAS, Akademichesky Ave., 10/3, Tomsk; 634055, Russia^1;Yugra Research Institute of Information Technologies, 151, Khanty-Mansiysk, Mira; 628011, Russia^2;Tomsk Polytechnic University, Lenina Ave., 30, Tomsk; 634050, Russia^3;Institute of Petroleum Chemistry SB RAS, Akademichesky Ave., 4, Tomsk; 634055, Russia^4

[效力级别] 计算机科学

[关键词] High spatial resolution;Log-normal distribution;Methane emissions;Pearson criterion;Satellite images;Simulation approach;Spatial structure;Thermokarst lakes