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(The University of Sydney) (The University of Sydney) (The University of Sydney) (Office of Environment and Heritage, Australia) (Office of Environment and Heritage, Australia)
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한국토양비료학회 한국토양비료학회 학술발표회 초록집 20th WORLD CONGRESS OF SOIL SCIENCE
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    초록·키워드

    At Cowra in New South Wales soil temperatures at a depth of 1.8 m were recorded daily at 9am from 1942 to 2010, and also at shallower depths from 1971 to 2010. At 1.8 m the seasonal temperature variation is greatly attenuated, leaving longer term variations. Fourier analysis of the annual temperature wave at the various depths, first used in 1861 by Everett to analyse Scottish soil temperature data, gave two estimates of soil thermal diffusivity from the way the amplitude and phase shift of the wave varied with depth. The closeness of these estimates showed that there was no significant transport of heat by vertical soil water movement. The annual average soil temperatures were calculated, and there is no long term trend from 1942 to 1968, but there is a steady long term rise from about 196 ... 전체 초록 보기

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