Dependence of attenuation in a vegetation canopy on frequency and plant water content
Theory is presented to provide insight into the observation that attenuation through vegetation is proportional to vegetation water content. In this analysis, the canopy is modeled as a sparse layer of randomly oriented particles (leaves, stalks, etc.) over a flat, homogeneous ground plane (soil) an...
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| Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 1996-09, Vol.34 (5), p.1090-1096 |
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| container_end_page | 1096 |
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| container_issue | 5 |
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| container_title | IEEE transactions on geoscience and remote sensing |
| container_volume | 34 |
| creator | Le Vine, D.M. Karam, M.A. |
| description | Theory is presented to provide insight into the observation that attenuation through vegetation is proportional to vegetation water content. In this analysis, the canopy is modeled as a sparse layer of randomly oriented particles (leaves, stalks, etc.) over a flat, homogeneous ground plane (soil) and an expression is obtained for the "optical depth". The formulas developed by Ulaby and El Rayes are used to relate this expression to the water content of the canopy. In the low frequency extreme (Rayleigh scatterers), the attenuation varies almost linearly with water content and inversely with wavelength. In contrast, in the high frequency limit, the attenuation is independent of both water content and frequency, in between, geometry dependent "resonances" occur even at the low frequency end of the microwave spectrum (e.g. L-band) making the dependence of attenuation on frequency and water content specific to canopy architecture. |
| doi_str_mv | 10.1109/36.536525 |
| format | Article |
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In this analysis, the canopy is modeled as a sparse layer of randomly oriented particles (leaves, stalks, etc.) over a flat, homogeneous ground plane (soil) and an expression is obtained for the "optical depth". The formulas developed by Ulaby and El Rayes are used to relate this expression to the water content of the canopy. In the low frequency extreme (Rayleigh scatterers), the attenuation varies almost linearly with water content and inversely with wavelength. In contrast, in the high frequency limit, the attenuation is independent of both water content and frequency, in between, geometry dependent "resonances" occur even at the low frequency end of the microwave spectrum (e.g. L-band) making the dependence of attenuation on frequency and water content specific to canopy architecture.</description><identifier>ISSN: 0196-2892</identifier><identifier>EISSN: 1558-0644</identifier><identifier>DOI: 10.1109/36.536525</identifier><identifier>CODEN: IGRSD2</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Agronomy. Soil science and plant productions ; Animal, plant and microbial ecology ; Attenuation ; Biological and medical sciences ; Biological effects of radiation ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Exact sciences and technology ; Frequency ; Fundamental and applied biological sciences. Psychology ; General aspects. Techniques ; Generalities. Biometrics, experimentation. Remote sensing ; Geometry ; L-band ; Microwave and radio-frequency interactions (excluding resonances) ; Non ionizing radiations. Hertzian waves. Biooptics ; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation ; Optical scattering ; Other interactions of matter with particles and radiation ; Particle scattering ; Physics ; Rayleigh scattering ; Remote sensing ; Soil ; Teledetection and vegetation maps ; Tissues, organs and organisms biophysics ; Vegetation</subject><ispartof>IEEE transactions on geoscience and remote sensing, 1996-09, Vol.34 (5), p.1090-1096</ispartof><rights>1996 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c430t-201e94a29cde3ad54051304c6819f5998fabacf9bc8f6cd29fa22e56770919ba3</citedby><cites>FETCH-LOGICAL-c430t-201e94a29cde3ad54051304c6819f5998fabacf9bc8f6cd29fa22e56770919ba3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/536525$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,796,23930,23931,25140,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/536525$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3240261$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Le Vine, D.M.</creatorcontrib><creatorcontrib>Karam, M.A.</creatorcontrib><title>Dependence of attenuation in a vegetation canopy on frequency and plant water content</title><title>IEEE transactions on geoscience and remote sensing</title><addtitle>TGRS</addtitle><description>Theory is presented to provide insight into the observation that attenuation through vegetation is proportional to vegetation water content. In this analysis, the canopy is modeled as a sparse layer of randomly oriented particles (leaves, stalks, etc.) over a flat, homogeneous ground plane (soil) and an expression is obtained for the "optical depth". The formulas developed by Ulaby and El Rayes are used to relate this expression to the water content of the canopy. In the low frequency extreme (Rayleigh scatterers), the attenuation varies almost linearly with water content and inversely with wavelength. In contrast, in the high frequency limit, the attenuation is independent of both water content and frequency, in between, geometry dependent "resonances" occur even at the low frequency end of the microwave spectrum (e.g. L-band) making the dependence of attenuation on frequency and water content specific to canopy architecture.</description><subject>Agronomy. Soil science and plant productions</subject><subject>Animal, plant and microbial ecology</subject><subject>Attenuation</subject><subject>Biological and medical sciences</subject><subject>Biological effects of radiation</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Exact sciences and technology</subject><subject>Frequency</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects. Techniques</subject><subject>Generalities. Biometrics, experimentation. Remote sensing</subject><subject>Geometry</subject><subject>L-band</subject><subject>Microwave and radio-frequency interactions (excluding resonances)</subject><subject>Non ionizing radiations. Hertzian waves. Biooptics</subject><subject>Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation</subject><subject>Optical scattering</subject><subject>Other interactions of matter with particles and radiation</subject><subject>Particle scattering</subject><subject>Physics</subject><subject>Rayleigh scattering</subject><subject>Remote sensing</subject><subject>Soil</subject><subject>Teledetection and vegetation maps</subject><subject>Tissues, organs and organisms biophysics</subject><subject>Vegetation</subject><issn>0196-2892</issn><issn>1558-0644</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNqNkU1rGzEQhkVpoW6SQ6856VAKPWyi0ZelY3DbJBDIpTkvY-2obLC125Wc4n8fhTW-xqfRoGce3mEY-wriCkD4a2WvjLJGmg9sAca4RlitP7KFAG8b6bz8zL7k_CwEaAPLBXv6SSOljlIgPkSOpVDaYemHxPvEkb_QXypzHzAN457XV5zo366O7Dmmjo8bTIX_x0ITD0OqgnLOPkXcZLo41DP29PvXn9Vd8_B4e7-6eWiCVqI0UgB5jdKHjhR2RgsDSuhgHfhovHcR1xiiXwcXbeikjyglGbtcCg9-jeqMfZ-94zTURLm02z4H2tRENOxyWxcG45f6BFBq54x8H7QgjTL2XRAcKO9PMIJxoKV7y_hjBsM05DxRbMep3-K0b0G0b8dtlW3n41b220GKOeAmTphCn48DSmpRk1bscsZ6Ijr-HhyvE_6q5g</recordid><startdate>19960901</startdate><enddate>19960901</enddate><creator>Le Vine, D.M.</creator><creator>Karam, M.A.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>7TG</scope><scope>KL.</scope><scope>H8D</scope><scope>L7M</scope><scope>KR7</scope></search><sort><creationdate>19960901</creationdate><title>Dependence of attenuation in a vegetation canopy on frequency and plant water content</title><author>Le Vine, D.M. ; Karam, M.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c430t-201e94a29cde3ad54051304c6819f5998fabacf9bc8f6cd29fa22e56770919ba3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Agronomy. Soil science and plant productions</topic><topic>Animal, plant and microbial ecology</topic><topic>Attenuation</topic><topic>Biological and medical sciences</topic><topic>Biological effects of radiation</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Exact sciences and technology</topic><topic>Frequency</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects. Techniques</topic><topic>Generalities. Biometrics, experimentation. Remote sensing</topic><topic>Geometry</topic><topic>L-band</topic><topic>Microwave and radio-frequency interactions (excluding resonances)</topic><topic>Non ionizing radiations. Hertzian waves. Biooptics</topic><topic>Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation</topic><topic>Optical scattering</topic><topic>Other interactions of matter with particles and radiation</topic><topic>Particle scattering</topic><topic>Physics</topic><topic>Rayleigh scattering</topic><topic>Remote sensing</topic><topic>Soil</topic><topic>Teledetection and vegetation maps</topic><topic>Tissues, organs and organisms biophysics</topic><topic>Vegetation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Le Vine, D.M.</creatorcontrib><creatorcontrib>Karam, M.A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Civil Engineering Abstracts</collection><jtitle>IEEE transactions on geoscience and remote sensing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Le Vine, D.M.</au><au>Karam, M.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dependence of attenuation in a vegetation canopy on frequency and plant water content</atitle><jtitle>IEEE transactions on geoscience and remote sensing</jtitle><stitle>TGRS</stitle><date>1996-09-01</date><risdate>1996</risdate><volume>34</volume><issue>5</issue><spage>1090</spage><epage>1096</epage><pages>1090-1096</pages><issn>0196-2892</issn><eissn>1558-0644</eissn><coden>IGRSD2</coden><abstract>Theory is presented to provide insight into the observation that attenuation through vegetation is proportional to vegetation water content. In this analysis, the canopy is modeled as a sparse layer of randomly oriented particles (leaves, stalks, etc.) over a flat, homogeneous ground plane (soil) and an expression is obtained for the "optical depth". The formulas developed by Ulaby and El Rayes are used to relate this expression to the water content of the canopy. In the low frequency extreme (Rayleigh scatterers), the attenuation varies almost linearly with water content and inversely with wavelength. In contrast, in the high frequency limit, the attenuation is independent of both water content and frequency, in between, geometry dependent "resonances" occur even at the low frequency end of the microwave spectrum (e.g. L-band) making the dependence of attenuation on frequency and water content specific to canopy architecture.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/36.536525</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0196-2892 |
| ispartof | IEEE transactions on geoscience and remote sensing, 1996-09, Vol.34 (5), p.1090-1096 |
| issn | 0196-2892 1558-0644 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Agronomy. Soil science and plant productions Animal, plant and microbial ecology Attenuation Biological and medical sciences Biological effects of radiation Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Frequency Fundamental and applied biological sciences. Psychology General aspects. Techniques Generalities. Biometrics, experimentation. Remote sensing Geometry L-band Microwave and radio-frequency interactions (excluding resonances) Non ionizing radiations. Hertzian waves. Biooptics Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical scattering Other interactions of matter with particles and radiation Particle scattering Physics Rayleigh scattering Remote sensing Soil Teledetection and vegetation maps Tissues, organs and organisms biophysics Vegetation |
| title | Dependence of attenuation in a vegetation canopy on frequency and plant water content |
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