{"title":"A combined temperature and water content model for bare soil","authors":"J. Kjellgren","doi":"10.1109/IGARSS.1997.609168","DOIUrl":null,"url":null,"abstract":"The authors have developed a combined temperature and water content model for bare soil in one spatial dimension (depth) and time. The main purpose of the model is the study of the surface temperature variations due to a number of environmental parameters. In addition the authors also study the water content of the soil due to the great influence of evaporation. They characterize the soil by the thermodynamic and water tension properties. Experimental data have been used to support the model development. The core of the model is two coupled differential equations, one describing the temperature and the heat flow of the soil and one handling the water fraction and the soil water flow. The thermodynamic parameters of the heat flow depend on the water content. At the soil surface they model the heat exchange due to solar radiation, the thermal radiation exchange between the soil and the sky, the heat exchange due to air (and rain) convection and the exchange of sensible heat (mainly evaporation). They suppose no heat flow through the bottom surface.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"14 1","pages":"1962-1965 vol.4"},"PeriodicalIF":0.0000,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"遥感信息","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.1109/IGARSS.1997.609168","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The authors have developed a combined temperature and water content model for bare soil in one spatial dimension (depth) and time. The main purpose of the model is the study of the surface temperature variations due to a number of environmental parameters. In addition the authors also study the water content of the soil due to the great influence of evaporation. They characterize the soil by the thermodynamic and water tension properties. Experimental data have been used to support the model development. The core of the model is two coupled differential equations, one describing the temperature and the heat flow of the soil and one handling the water fraction and the soil water flow. The thermodynamic parameters of the heat flow depend on the water content. At the soil surface they model the heat exchange due to solar radiation, the thermal radiation exchange between the soil and the sky, the heat exchange due to air (and rain) convection and the exchange of sensible heat (mainly evaporation). They suppose no heat flow through the bottom surface.
期刊介绍：
Remote Sensing Information is a bimonthly academic journal supervised by the Ministry of Natural Resources of the People's Republic of China and sponsored by China Academy of Surveying and Mapping Science. Since its inception in 1986, it has been one of the authoritative journals in the field of remote sensing in China.In 2014, it was recognised as one of the first batch of national academic journals, and was awarded the honours of Core Journals of China Science Citation Database, Chinese Core Journals, and Core Journals of Science and Technology of China. The journal won the Excellence Award (First Prize) of the National Excellent Surveying, Mapping and Geographic Information Journal Award in 2011 and 2017 respectively.
Remote Sensing Information is dedicated to reporting the cutting-edge theoretical and applied results of remote sensing science and technology, promoting academic exchanges at home and abroad, and promoting the application of remote sensing science and technology and industrial development. The journal adheres to the principles of openness, fairness and professionalism, abides by the anonymous review system of peer experts, and has good social credibility. The main columns include Review, Theoretical Research, Innovative Applications, Special Reports, International News, Famous Experts' Forum, Geographic National Condition Monitoring, etc., covering various fields such as surveying and mapping, forestry, agriculture, geology, meteorology, ocean, environment, national defence and so on.
Remote Sensing Information aims to provide a high-level academic exchange platform for experts and scholars in the field of remote sensing at home and abroad, to enhance academic influence, and to play a role in promoting and supporting the protection of natural resources, green technology innovation, and the construction of ecological civilisation.
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