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首页> 外文期刊>The International Journal of Environmental Studies >Thermokarst lakes of Western Siberia: a complex biogeochemical multidisciplinary approach
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Thermokarst lakes of Western Siberia: a complex biogeochemical multidisciplinary approach

机译：西西伯利亚的热喀斯特喀斯特湖：复杂的生物地球化学多学科方法

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摘要

Western Siberia's thermokarst lakes are highly dynamic hydrochemical systems that receive chemical elements from the surrounding peat soil and exchange greenhouse gases with the atmosphere, delivering dissolved carbon and metals to adjacent hydrological systems. Climate warming is likely to intensify the magnitude of these processes, thus seriously affecting the biogeochemical fluxes both on land and in the coastal zone of the Arctic Ocean. In this work, we review biogeochemical and morphological features of thermokarst water bodies comprising frozen palsa depressions up to large, kilometre-size lakes and drained lakes. Based on a compilation of more than a hundred analyses of these water bodies, we discuss the average concentration of organic carbon, as well as the major and trace elements, and predict the development of their chemical composition, CO_2 and CH_4 exchange with the atmosphere and effect on the riverine fluxes from the land to the ocean under the climate-warming scenario. The accelerating permafrost thaw and rising water temperatures in this region will probably shorten the life cycle of the thermokarst thaw water bodies, increase the fluxes of both CO_2 and CH_4 into the atmosphere, increase the concentration and delivery of dissolved organic carbon and related trace metals to the hydrological network and increase the potential bioavailability of micronutrients. Thus, the impact of permafrost thaw in Western Siberia on the global plantery processes, via the retroactive link between climate change and the thermokarst lakes' geochemical activity, may be more significant than is currently expected.
机译：西伯利亚西部的喀斯特喀斯特湖是高度动态的水化学系统，可以从周围的泥炭土中吸收化学元素，并与大气交换温室气体，将溶解的碳和金属输送到相邻的水文系统中。气候变暖可能会加剧这些过程的强度，从而严重影响陆地和北冰洋沿海地区的生物地球化学通量。在这项工作中，我们审查了热喀斯特水体的生物地球化学和形态特征，包括冻结的帕尔萨洼地，直至大型，千米大小的湖泊和流失的湖泊。基于对这些水体的一百多个分析的汇总，我们讨论了有机碳的平均浓度以及主要和微量元素，并预测了它们的化学组成，与大气和大气中的CO_2和CH_4交换的发展。气候变暖情景下对从陆地到海洋的河流通量的影响该地区冻土融化的加速和水温的升高可能会缩短喀斯特冻融水体的生命周期，增加CO_2和CH_4进入大气的通量，增加溶解性有机碳和相关微量金属的浓度和输送水文网络，增加微量元素的潜在生物利用度。因此，西伯利亚西部的多年冻土融化，通过气候变化和热喀斯特湖的地球化学活动之间的追溯联系，对全球种植过程的影响可能比当前预期的更为重要。

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