Predicting spatial and temporal patterns of soil temperature based on topography, surface cover and air temperature

Kang, Sinkyu; Kim, S; Oh, Sungchan; Lee, Daeyoup

doi:10.1016/s0378-1127(99)00290-x

Cited by 201 publications

(149 citation statements)

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“…F SOIL can vary spatially and temporally within and across systems as a result of the varied and complex interactions of controlling mechanisms (Drewitt et al, 2002, Trumbore, 2006Vargas et al, 2010). The edaphic controls on F SOIL on the landscape scale include soil temperature, soil moisture, root biomass, microbial biomass, soil chemistry, and soil physics (Fang et al, 1998;Davidson et al, 1998;Kang et al, 2000;Xu and Qi, 2001;Epron et al, 2004). These factors do not simply elicit additive or monotonic responses but, rather, create complex responses of F SOIL across spatial and temporal scales (Dilustro et al, 2005;Pacific et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed

2015

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Abstract. In topographically complex watersheds, landscape position and vegetation heterogeneity can alter the soil water regime through both lateral and vertical redistribution, respectively. These alterations of soil moisture may have significant impacts on the spatial heterogeneity of biogeochemical cycles throughout the watershed. To evaluate how landscape position and vegetation heterogeneity affect soil CO 2 efflux (F SOIL ), we conducted observations across the Weimer Run watershed (373 ha), located near Davis, West Virginia, for three growing seasons with varying precipitation. An apparent soil temperature threshold of 11 • C for F SOIL at 12 cm depth was observed in our data, where F SOIL rates greatly increase in variance above this threshold. We therefore focus our analyses of F SOIL on instances in which soil temperature values were above this threshold. Vegetation had the greatest effect on F SOIL rates, with plots beneath shrubs at all elevations, for all years, showing the greatest mean rates of F SOIL (6.07 µmol CO 2 m −2 s −1 ) compared to plots beneath closedforest canopy (4.69 µmol CO 2 m −2 s −1 ) and plots located in open, forest gap (4.09 µmol CO 2 m −2 s −1 ) plots. During periods of high soil moisture, we find that CO 2 efflux rates are constrained, and that maximum efflux rates occur during periods of average to below-average soil water availability. While vegetation was the variable most related to F SOIL , there is also strong interannual variability in fluxes determined by the interaction of annual precipitation and topography. These findings add to the current theoretical constructs related to the interactions of moisture and vegetation in biogeochemical cycles within topographically complex watersheds.

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Section: Introductionmentioning

confidence: 99%

Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed

2015

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“…No caso de solos desprovidos de vegetação, a produção de CO 2 pode ser totalmente relacionada à atividade microbiana que será influenciada pela temperatura e pela umidade do solo. Esses atributos apresentam grande variabilidade temporal e espacial e guardam relação direta com as condições climáticas e topográficas do local onde o CO 2 está sendo produzido (KANG et al, 2000).…”

Section: Resultsunclassified

Emissões De Gases De Efeito Estufa Na Produção De Mamona E De Seus Subprodutos

Fracetto

Feigl³

et al. 2015

Rev. Caatinga

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RESUMO -A maior produção brasileira de mamona (Ricinus communis L.) se concentra na caatinga do estado da Bahia, onde a mudança do uso da terra para o seu cultivo tem sido considerada uma estratégia de recuperação de áreas degradadas. No entanto, alterações no solo nativo proporcionam impactos ambientais, como emissões de gases de efeito estufa (GEE). Presume-se que elevadas emissões de GEE sejam provenientes da mudança do uso da terra para o cultivo de mamona e que os subprodutos dessa oleaginosa também participam dessas emissões. O objetivo deste trabalho foi realizar o inventário das emissões de GEE decorrentes do cultivo da mamona e seus subprodutos. Foi realizado um estudo na Fazenda Floresta, no município de Irecê (BA), onde foram avaliadas: a mudança no estoque de carbono (C) no solo cultivado com mamona e na floresta nativa local; a quantidade de folhas senescentes e fitomassa epígea; e as emissões de GEE provenientes dos subprodutos da produção agrícola de mamona. Os resultados mostraram que a soma das folhas senescentes e fitomassa epí-gea obtida pela poda da mamona é superior a 1,6 Mg ha -1 ano -1 e o uso da torta de mamona no solo apresentou emissões de N 2 O próximas a 600 µg m -2. As emissões provenientes do uso do biodiesel de óleo de rícino representaram menos de 10% das emissões. A mudança de uso da terra foi responsável pelas elevadas emissões de GEE, representando 87% do total em CO 2 eq. Em comparação às emissões estimadas para o etanol de cana-deaçúcar, o biodiesel de mamona apresentou emissões 32% inferiores.Palavras-chave: Semiárido. Mudança de uso da terra. Fitomassa de mamona. Biodiesel. GREENHOUSE GAS FROM CASTOR BEAN PRODUCTION AND THEIR SUBPRODUCTSABSTRACT -The largest production of castor bean (Ricinus communis L.) focuses on Bahia savanna, where the change of land use to their cultivation has been considered a strategy of degraded areas recovery. However, changes in the native soil can arise environmental impacts as greenhouse gases (GHG) emissions. We have assumed that higher GHG emissions come from a change of land use for castor bean cultivation and their subproducts contribute to GHG emissions. The objective of this study was to make the inventory of the emission of GHG resulting from the castor bean cultivation and their sub-products. It was done a study in the municipality of Irecê-BA and were evaluated: changes in carbon (C) soil stocks in cultivated areas with castor bean and Local native forest; a number of senescent leaves and the biomass produced epigeal; GHG emissions from the sub -products of castor bean. The results showed that the sum of senescent leaves and epigeal biomass obtained by castor bean pruning is more than 1.6 Mg ha -1 ano -1 and the castor bean residues used in this soil presented N 2 O emissions close to 600 µg m -2 . The emissions from the use of castor oil biodiesel represented less than 10% of the emissions. The change in land use handled high emissions of greenhouse gases, accounting for 87% of the total in CO 2 eq. Compared to emissions estimated fo...

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“…The litter layer reduced both the heating of the mineral soil underneath during the day and the cooling during the night, probably because the porosity of the layer strongly decreases its thermal conductivity (Barkley et al, 1965). The effect of the litter layer on the daily fluctuation of soil temperature must be taken into account in models predicting forest soil temperature, as does the model presented by Kang et al (2000), particularly in cool regions, where litter layers are thick due to the low decomposition rates.…”

Section: Thermal Wave Damping With Depthmentioning

confidence: 99%

“…Strictly, equation (3) is only applicable if mean temperatures are invariant along the soil profile. However, most models to predict daily and seasonal changes of soil temperature assume a constant mean soil temperature along the profile (Kang et al, 2000;Paul et al, 2004), irrespectively of the soil type and period of the year, to be able to use the equation. The fitted regressions were significant (*p < 0.05) on all single days, showing (Table 7) were significantly higher (*p < 0.05) than those for the entire profile and for P2 due to the lower temperature amplitude gradients in the Ah horizon under the litter layer.…”

Section: Thermal Wave Damping With Depthmentioning

confidence: 99%

“…Additional shelter provided by the litter layer may reduce further convective and radiative heat exchange between soil and atmosphere, but this effect may depend on both the degree of canopy cover and thickness of the layer (Johnson-Maynard et al, 2004). Kang et al (2000) predicted deciduous forest soil temperatures from air temperature data in vast areas and latitudes, and assigned a value to the litter layer similar to that of the leaf area index, while Paul et al (2004) used the litter layer mass to predict average soil temperatures from air temperature of several forest types in Australia. The daily variation of soil temperature would be reduced under increased shelter, controlling the penetration depth of the daily heat wave into the soil.…”

Section: Introductionmentioning

confidence: 99%

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Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate

Andrade

Abreu

Madeira

2010

Rev. Bras. Ciênc. Solo

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SUMMARYThe removal of the litter layer in Portuguese pine forests would reduce fire hazard, but on the other hand this practice would influence the thermal regime of the soil, hence affecting soil biological activity, litter decomposition and nutrient dynamics. Temperature profiles of a sandy soil (Haplic Podzol) under a pine forest were measured with thermocouples at depths to 16 cm, with and without litter layer. The litter layer acted as a thermal insulator, reducing the amplitude of the periodic temperature variation in the mineral soil underneath and increasing damping depths, particularly at low soil water contents. At the mineral soil surface the reduction of amplitudes was about 2.5 ºC in the annual cycle and 5 to 6.7 ºC in the daily cycle, depending on the soil water content. When soil was both cold and wet, mean daily soil temperatures were higher (about 1 -1.5 ºC) under the litter layer. Improved soil thermal conditions under the litter layer recommend its retention as a forest management practice to follow in general.Index terms: soil temperature, Fourier series, damping depth.(1) Received for publication in May 2010 and approved in July 2010.

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Predicting spatial and temporal patterns of soil temperature based on topography, surface cover and air temperature

Cited by 201 publications

References 40 publications

Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed

Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed

Emissões De Gases De Efeito Estufa Na Produção De Mamona E De Seus Subprodutos

Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate

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Predicting spatial and temporal patterns of soil temperature based on topography, surface cover and air temperature

Cited by 201 publications

References 40 publications

Vegetation and elevation influence the timing and magnitude of soil CO&lt;sub&gt;2&lt;/sub&gt; efflux in a humid, topographically complex watershed

Vegetation and elevation influence the timing and magnitude of soil CO&lt;sub&gt;2&lt;/sub&gt; efflux in a humid, topographically complex watershed

Emissões De Gases De Efeito Estufa Na Produção De Mamona E De Seus Subprodutos

Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate

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Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed

Vegetation and elevation influence the timing and magnitude of soil CO<sub>2</sub> efflux in a humid, topographically complex watershed