Eurasian Soil Science ( IF 1.4 ) Pub Date : 2022-04-22 , DOI: 10.1134/s1064229322040123 M. A. Nadporozhskaya 1 , E. V. Abakumov 1 , S. S. Bykhovets 2
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Abstract
The specific features in the formation of a system of biologically active surface horizons (organoprofile) in the Subantarctic lithozems (Leptosols) are analyzed using mathematical modeling. Simulation experiments involve the ROMUL mathematical model. The working scenarios are compiled taking into account the specific features of the effects of climate, fauna, and vegetation of the coasts of King George Island, archipelago of the South Shetland Islands, West Antarctica. The periodicity of temperature recording (using daily or monthly average values) has little effect on the simulation results. As is shown, different localizations of the litterfall under green mosses and Antarctic hair grass (Deschampsia antarctica) lead to development of the organoprofiles differing in their structure and quality. The enrichment with nitrogen due to the vital activity of penguins increases the litterfall transformation intensity and enhances humification. Note that the results of a medium-term (50-year-long) simulation of the dynamics of organic matter pools in the lithozems with different ornithogenic impacts significantly differ in the case of a change in vegetation type and an increase in the nitrogen concentration in litterfall. Long-term (at constant climate and litterfall) computational experiments have shown that the litter and humus pools under the Subantarctic conditions reach a stable state in 200 and 500 years, respectively. Soil CO2 emission in the simulated ranges of soil forming factors can be regarded as consistent with the results of field measurements if a large part of the gross СО2 flux results from the respiration of vegetation. The compilation of scenarios for simulation experiments has shown that the field information on the pools of surface organic horizon (litter) and their quality for drained Antarctic soils is insufficient. Litter is an important indicator of the actual response of Antarctic soils to the change in soil forming factors and must be taken into account. We invite the international community of the scientists studying the soils of Antarctic to agree on the unification of descriptions of the key sites and calculations of the results of field studies.
中文翻译：
ROMUL 数学模型在亚南极岩土中 CO2 排放和有机物质动力学估算中的应用
摘要
使用数学模型分析了亚南极岩土（Leptosols）中生物活性表面层（有机分布）系统形成的具体特征。仿真实验涉及 ROMUL 数学模型。编制工作情景时考虑了气候、动物群和植被对西南极洲南设得兰群岛乔治王岛海岸的影响的具体特征。温度记录的周期性（使用每日或每月平均值）对模拟结果影响不大。如图所示，在绿色苔藓和南极毛草（Deschampsia antarctica) 导致其结构和质量不同的有机谱的发展。由于企鹅的生命活动，氮的富集增加了凋落物转化强度并增强了腐殖化。请注意，在植被类型发生变化和氮浓度增加的情况下，具有不同鸟类影响的岩土中有机质库动态的中期（50 年）模拟结果显着不同。垃圾。长期（恒定气候和凋落物）计算实验表明，亚南极条件下的凋落物和腐殖质池分别在 200 年和 500 年达到稳定状态。土壤CO 2如果总СО 2通量的很大一部分来自植被的呼吸作用，则模拟的土壤形成因子范围内的排放可被视为与现场测量的结果一致。模拟实验的情景汇编表明，关于地表有机层（枯枝落叶）池及其排水南极土壤质量的现场信息不足。凋落物是南极土壤对土壤形成因子变化的实际响应的重要指标，必须加以考虑。我们邀请研究南极土壤的国际科学家社区就关键地点的描述和实地研究结果的计算达成一致。
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