土壤表层二氧化碳浓度分布情况研究

雪婷 王(浙江农林大学，中国)

摘要

近年来，由于全球气候变暖，土壤呼吸速率加快导致土壤表层 CO2 浓度变化趋势加快。土壤表层 CO2 浓度变化趋势对全球气候变化有着重要影响，因此准确分析土壤表层 CO2 浓度变化趋势显得尤为重要。土壤中 CO2 的扩散过程符合 Fick 定律扩散模型。本文通过对全球土壤呼吸速率的分布情况推导分析土壤表层 CO2 浓度变化趋势的研究，通过 Fick 定律及克里金插值算法的推导可以较为准确的分析土壤表层 CO2 浓度的变化趋势。通过公式推导及数据分析，主要发现土壤表层 CO2 浓度变化趋势呈现时间、空间分布，同时温度、大气 CO2 浓度对土壤表层 CO2 浓度变化趋势有着较大的影响。

关键词

土壤表层；二氧化碳；浓度；变化趋势

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DOI: http://dx.doi.org/10.26549/gcjsygl.v3i9.2570