Soil carbon dioxide and weathering potentials in tropical karst terrain, peninsular Malaysia: A preliminary model

Crowther, John

doi:10.1002/esp.3290090502

Cited by 20 publications

(10 citation statements)

References 28 publications

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“…This seasonality, with a peak during the growing season, corroborates the common notion that the CO2 contained in and evolving from the soil is mostly a product of root respiration and decomposition of organic matter in the soil through microbial activity (Kucera and Kirkham 1971). However, in regions where seasonal variations in temperature or moisture are insignificant, factors such as soil bulk density and groundwater recharge become dominant, as Crowther (1984) found in Malaysia. Gunn and Trudgill (1982) indicated that prediction of soil COP levels from climatic data is not generally possible because of the complexity of controlling factors involved.…”

supporting

confidence: 81%

Soil Carbon Dioxide Concentrations and Climate in a Humid Subtropical Environment

Kiefer

1990

The Professional Geographer

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Soil carbon dioxide content, temperature, and moisture were measured biweekly for one year at Pigeon Mountain, GA. Levels of soil CO2 ranged from 0.04% to 2.4% and were highest during the growing season, lowest during the winter. Soil temperature correlated positively with soil CO2, accounting for 90% of CO2 variation. Soil moisture variations decreased CO2 concentration at times of high soil water content when CO2 was flushed downward, and also at times of low soil moisture content when CO2 production was inhibited. A predictive model of logistic form using 14‐day means of daily actual evapotranspiration fit the data well (R2= 0.83). The model also tested well against soil CO2 data acquired in the coastal plain at Rocky Point, NC. If actual evapotranspiration rates are known, the model permits estimation of soil CO2 without preliminary field work, and can be used for studies of karst denudation, which require soil CO2 data for seasonal and regional comparison of solution rates.

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supporting

confidence: 81%

Soil Carbon Dioxide Concentrations and Climate in a Humid Subtropical Environment

Kiefer

1990

The Professional Geographer

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“…These data should be compared with the standard atmospheric mean PCO 2 at sea level of about 0·035 per cent. The ranges and mean values of the individual stations are a little below those reported from the shorter period, shallow depth (≤60 cm) studies in other extraglacial karsts in Malaysia (Crowther, 1984) and New Zealand (Gunn and Trudgill, 1982).…”

Section: Infiltration and The Soil Moisture Regimecontrasting

confidence: 58%

“…Once again these have been limited largely to sampling in the upper 50 cm or so of hillslope soils or depression fillings (e.g. Brook and Ford, 1982;Gunn and Trudgill, 1982;Crowther, 1983Crowther, , 1984.…”

Section: Introductionmentioning

confidence: 99%

Limestone Dissolution Processes in Beke Doline Aggtelek National Park, Hungary

Zámbó

Ford

1997

Earth Surf. Process. Landforms

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Aggtelek National Park, Hungary, is a limestone karst upland characterized by karren, dolines and river caves. For a period of two years, climatic and carbonate dissolution variables were monitored at four depths in a 7·5 m shaft through the soil fill in the floor of a typical large (150 m diameter) doline. Results are compared to other monitoring stations in shallow soils on side slopes. Runoff and groundwater flow are focused into the base of the doline soil fill, where moisture is maintained at 70-90 per cent field capacity and temperatures permit year-round production of soil CO 2 . The capacity to dissolve calcite (limestone) ranges from c.3g m −2 per year beneath thin soils on the driest slopes to 17-30 g m −2 per year in the top 1-2 m of doline fill and at its base 5-7 m below.

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“…Perhaps the most compelling unanswered question in the field of karst studies is why humid tropical karst terrains are more accentuated than are the karst landscapes of temperate and colder environments. In order to answer this question, most karst studies focus on the estimation of karst chemical denudation rates in different climatic settings (Williams and Dowling 1979;Gunn 1981;Crowther 1984;Day 1984;Zambo and Ford 1997). However, karst geomorphologists are still not sure if tropical karst terrains with the most spectacular landforms have higher chemical denudation rates than temperate and cold karst terrains (Sweeting 1972;Jakucs 1977;Jennings 1985;Trudgill 1985;White 1988;Ford and Williams 1989).…”

Section: Introductionmentioning

confidence: 99%

A World Model of Chemical Denudation in Karst Terrains

Sheen

2000

The Professional Geographer

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In this paper, I develop global karst chemical denudation models using chemical equilibrium equations. Theoretical karst chemical denudation rates are calculated as soil carbon dioxide concentration varies from 10 Ϫ 3.5 atm to 10 Ϫ 1.0 atm, temperature varies from 0 Њ C to 30 Њ C, and annual runoff varies from 500 mm to 3,000 mm. Both open and closed karst solution systems are examined. The Drake (1980) and the Brook-Folkoff-Box (1983) soil pCO 2 equations are used to develop chemical denudation models for different carbonate rocks (limestone and dolomite), climate (tropical, temperate, and arctic/alpine terrains), and karst solution type (open and closed systems). The major conclusion is that the karst solution type, least known in the past karst studies, is an important factor in controlling chemical denudation rates.

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Soil carbon dioxide and weathering potentials in tropical karst terrain, peninsular Malaysia: A preliminary model

Abstract: ABSTRACT

Cited by 20 publications

References 28 publications

Soil Carbon Dioxide Concentrations and Climate in a Humid Subtropical Environment

Soil Carbon Dioxide Concentrations and Climate in a Humid Subtropical Environment

Limestone Dissolution Processes in Beke Doline Aggtelek National Park, Hungary

A World Model of Chemical Denudation in Karst Terrains

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