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Title: Modelling daily and annual cycles of temperature in two types of soil
Authors: Andrade, José
Abreu, Francisco
Keywords: Soil temperature
Issue Date: Aug-2002
Citation: Transactions of 17th World Congress of Soil Science – Soi Science: confronting new realities in the 21th century
Abstract: Soil temperature influences strongly crop development and growth. The daily and annual periodic variations of soil temperature follow closely the time-course of solar irradiance. The temperature profiles of a Luvisol and a Vertisol, in the mediterranean reagion of southern Portugal, were measured at six depths (2 to 32 cm), and the analysis of daily and annual temperature cycles was performed by means of Fourier series; daily cycles were studies based on data from four typical clear days through the year. Daily course of soil temperature was well described by the two first Fourier harmonics, while the annual course of soil temperature was described satisfactorily by the firs harmonic alone, which explain more than 90% of total variance. Soi heterogeneity effects on the simulation and on wave damping are also discussed.
Type: article
Appears in Collections:GEO - Artigos em Livros de Actas/Proceedings

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