Cycles of Temperature and Carbon Dioxide Evolution From Litter and Soil

Abstract

Periodic measurement of CO2 evolution from various biotopes reveals a daily cycle in soil respiration with a predawn minimum and an afternoon maximum that parallels the daily temperature cycle. A second maximum occasionally occurs between midnight and dawn when soil temperatures exceed temperature of the surface air. This predawn flush may result from thermal convection of CO2—rich subsurface air to the surface. The time of measurement must be considered for comparisons of rates of CO2 evolution from different sites, and measurements should be made over a 24—hr period for estimates of daily CO2 evolution.

Comparison of static and dynamic closed chambers for measurement of soil respiration under field conditions

“…2). These results indicated that the sampling design used in this study reduced the effects of spatial variability of soil respiration observed in previous method comparisons (Witkamp 1969;Cropper et al 1985).…”

“…Static chambers have been used to measure soil respiration for more than 60 yr (Lundegardh 1927 Gupta and Singh 1977;Sharkov 1984 (Kanemasu et al 1974;Ewel et al 1987) or chemically trapped (Witkamp 1969 (Norman et al 1990: Hall et al 1990Rochette et al' 1991 Thirty pairs of sampling points were marked in a 4 x 10-m plot (Fig. 1) between the flux values measured by the two systems (Fig.…”

Budget and distribution of organic carbon in Quercus serrata Thunb. ex Murray forest in Mt. Worak

“…The scale of soil respiration is similar to NPP and it is influenced by soil temperature, moisture, rainfall, typhoon, and root respiration but especially the rainfall increases soil respiration (Lee et al 2006). The seasonal change in soil respiration of Q. serrata forest had the same trend in many other researches (Buchmann 2000) and close correlation between soil respiration and soil temperature is already well-known to scholars (Witkamp 1969, Dulohery et al 1996, Lee 2014b. It was reported that soil moisture greatly influences soil respiration as well (Liu et al 2006).…”

Geochemical Investigation of Aquifer Pollution From Waste Management. The Case of Komotini Landfill (Greece)

“…The biogas flux measurements were carried out with the stationary method of accumulation chamber (Witkamp, 1969;Kucera and Kirkham, 1971;Kanemasu et al, 1974;Parkinson, 1981, Tonani andMiele, 1991;Chiodini et al, 1996;Chiodini et al, 1998) considering the lower weather dependence conditions indicated by Trégourès et al (1999). This method allows to measure the increase of concentration of a given gas specie inside a sealed chamber, open only on the bottom, in touch with the ground; a non stationary version has been used to measure the diffused gas emissions in landfills (Cossu et al, 1997).…”