Soil surface CO₂ efflux measurements in Norway spruce forests: Comparison between four different sites across Europe ¡ª from boreal to alpine forest

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• 作者：Manuel Acosta^a ; ¹ ; ^{manuelacosta35@gmail.com} ; Marian Pavelka^a ; Leonardo Montagnani^b ; Werner Kutsch^c ; Anders Lindroth^d ; Radosł ; aw Juszczak^e ; Dalibor Janouš ; ^a
• 关键词：Soil CO2 efflux ; Forest ; Chamber method ; Q10 ; Soil temperature ; Spatial variability
• 刊名：Geoderma
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：192
• 期：Complete
• 页码：295-303
• 全文大小：773 K

文摘

Extensive measurements of soil surface (including vegetation cover) CO₂ efflux were carried out on 80 positions at four different forest sites (Sweden, Germany, Czech Republic and Italy) using a closed dynamic chamber technique. The period of measurement was 4-5 consecutive days per site. Two approaches were used to analyze the measured data, the Q₁₀ parameter and the Arrhenius relationship. Basic environmental factors such as soil temperature and moisture were measured. All the four investigated sites showed a positive dependence of the soil surface CO₂ efflux on soil temperature. The four datasets generally resulted in good agreement (up to 93 % ) between the approaches and residual analysis showed no significant difference between approaches (less than 8 % ). The Q₁₀ ranged between 2.0 and 2.3 among the sites. The highest spatial variation of the soil surface CO₂ efflux at 10 ¡ãC (expressed by the coefficient of variation CV) ranged from 30 to 65 % between sites.