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    Author(s): Shuhua Yi; Kristen Manies; Jennifer Harden; David. McGuire
    Date: 2009
    Source: Geophysical Research Letters. 36: L05501
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (1.38 MB)

    Description

    Soil organic layers (OL) play an important role in land-atmosphere exchanges of water, energy and carbon in cold environments. The proper implementation of OL in land surface and ecosystem models is important for predicting dynamic responses to climate warming. Based on the analysis of OL samples of black spruce (Picea mariana), we recommend that implementation of OL for cold regions modeling: (1) use three general organic horizon types (live, fibrous, and amorphous) to represent vertical soil heterogeneity; (2) implement dynamics of OL over the course of disturbance, as there are significant differences of OL thickness between young and mature stands; and (3) use two broad drainage classes to characterize spatial heterogeneity, as there are significant differences in OL thickness between dry and wet sites. Implementation of these suggestions into models has the potential to substantially improve how OL dynamics influence variability in surface temperature and soil moisture in cold regions.

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    Citation

    Yi, Shuhua; Manies, Kristen; Harden, Jennifer; McGuire, David. 2009. Characteristics of organic soil in black spruce forests: implications for the application of land surface and ecosystem models in cold regions. Geophysical Research Letters. 36: L05501.

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    Keywords

    organic soil, black spruce, forest, land surface, ecosystem models, cold regions

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