Classification of Permafrost Soils

Moore, J. P.; Ping, C. L.

doi:10.2136/sh1989.4.0098

Cited by 13 publications

(6 citation statements)

References 5 publications

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“…This suggests that once soils begin to cool the amount and type of vegetation present can slow heat loss by preventing radiative cooling and therefore heat extraction from the ground. Similar results were obtained by Moore and Ping (1989) for a study site that included stands of both aspen (Populus spp.) and spruce.…”

Section: Pedothermic Periodssupporting

confidence: 84%

Changes in Soil Temperature Associated with Reforestation in Central New York State

Scull

2007

Physical Geography

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Central New York State has experienced extensive reforestation during the past hundred years, significantly altering many natural systems. In order to begin to assess the impact of reforestation on soil organic carbon, soil temperature was measured within four different land cover types representing various stages of secondary succession following agricultural abandonment. Over forty thousand soil temperature observations were summarized by pedothermic period in order to characterize seasonal differences between cover types and to determine how mean annual temperature changes during reforestation. Forested sites were cooler during the spring and summer, and slightly warmer in the fall. During the winter field locations were significantly warmer that the forested sites, perhaps due to more complete snow cover, which acts to insulate the soil from cold winter air. In addition, soil temperature variability and vegetation were negatively correlated; as vegetation cover increased, variability in soil temperature decreased. Overall, results suggest that as succession proceeds average annual soil temperatures will decrease. Therefore, the succeeding forests will act as a carbon sink by both absorbing carbon directly from the atmosphere, thus increasing standing biomass, and decreasing soil temperature, which should increase the capacity of the soil landscape to store carbon. [Key words: soil temperature, organic carbon, secondary succession, New York.]

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Section: Pedothermic Periodssupporting

confidence: 84%

Changes in Soil Temperature Associated with Reforestation in Central New York State

Scull

2007

Physical Geography

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“…The intensity of freezing or thawing may dictate the duration of zero curtain, the changes of which can be mapped over time. On the basis of these parameters and the criteria for classifications of permafrost conditions (e.g., [61]), it is possible that a quantitative map of permafrost extent and the depth of the active layer can be estimated.…”

Section: Potential For Quantified Mapping Of Seasonally Frozen Groundmentioning

confidence: 99%

Toward the Detection of Permafrost Using Land-Surface Temperature Mapping

et al. 2020

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Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing carbon from soils, and altering seasonal water availability. Therefore, it is important to quantitatively map the change in the extent and depth of permafrost. We used satellite images of land-surface temperature to recognize and map the zero curtain, i.e., the isothermal period of ground temperature during seasonal freeze and thaw, as a precursor for delineating permafrost boundaries from remotely sensed thermal-infrared data. The phase transition of moisture in the ground allows the zero curtain to occur when near-surface soil moisture thaws or freezes, and also when ice-rich permafrost thaws or freezes. We propose that mapping the zero curtain is a precursor to mapping permafrost at shallow depths. We used ASTER and a MODIS-Aqua daily afternoon land-surface temperature (LST) timeseries to recognize the zero curtain at the 1-km scale as a “proof of concept.” Our regional mapping of the zero curtain over an area around the 7000 m high volcano Ojos del Salado in Chile suggests that the zero curtain can be mapped over arid regions of the world. It also indicates that surface heterogeneity, snow cover, and cloud cover can hinder the effectiveness of our approach. To be of practical use in many areas, it may be helpful to reduce the topographic and compositional heterogeneity in order to increase the LST accuracy. The necessary finer spatial resolution to reduce these problems is provided by ASTER (90 m).

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“…] system. A brief account of the general advantages and disadvantages of the above two schemes has been given by Moore et al (1983). Table 1, compiled by 1.…”

Section: Taxonomic Classification and Nomenclaturementioning

confidence: 99%