A spectral analysis of 25 boreal tree species
Spectral libraries have a fundamental role in the development of interpretation methods for airborne and satellite-borne remote sensing data. This paper presents to-date the largest spectral measurement campaign of boreal tree species. Reflectance and transmittance spectra of over 600 leaf and needl...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Finnish Society of Forest Science
2017-01-01
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| Series: | Silva Fennica |
| Online Access: | https://www.silvafennica.fi/article/7753 |
| _version_ | 1828435897746456576 |
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| author | Hovi, Aarne Raitio, Pekka Rautiainen, Miina |
| author_facet | Hovi, Aarne Raitio, Pekka Rautiainen, Miina |
| author_sort | Hovi, Aarne |
| collection | DOAJ |
| description | Spectral libraries have a fundamental role in the development of interpretation methods for airborne and satellite-borne remote sensing data. This paper presents to-date the largest spectral measurement campaign of boreal tree species. Reflectance and transmittance spectra of over 600 leaf and needle samples from 25 species were measured in the Helsinki area (Finland) using integrating sphere systems attached to an ASD FieldSpec 4 spectroradiometer. Factors influencing the spectra and red edge inflection point (REIP) were quantified using one-way analysis of variance. Tree species differed most in the shortwave-infrared (1500â2500 nm) and least in the visible (400â700 nm) wavelength region. Species belonging to same genera showed similar spectral characteristics. Upper (adaxial) and lower (abaxial) leaf sides differed most in the visible region. Canopy position (sunlit/shaded) had a minor role in explaining spectral variation. For evergreen conifers, current and previous year needles differed in their spectra, current-year needles resembling those of broadleaved and deciduous conifers. Two broadleaved species were monitored throughout the growing season (MayâOctober), and two conifers were measured twice during summer (June, September). Rapid changes were observed in the spectra in early spring and late autumn, whereas seasonal variations during summer months were relatively small for both broadleaved and coniferous species. Based on our results, shortwave-infrared seems promising in separating tree species, although it is to-date least studied. The spectral library reported here (Version 1.0) is publicly available through the SPECCHIO Spectral Information System. |
| first_indexed | 2024-12-10T19:16:28Z |
| format | Article |
| id | doaj.art-63affd52371a42b4ada0ded3758a9986 |
| institution | Directory Open Access Journal |
| issn | 2242-4075 |
| language | English |
| last_indexed | 2024-12-10T19:16:28Z |
| publishDate | 2017-01-01 |
| publisher | Finnish Society of Forest Science |
| record_format | Article |
| series | Silva Fennica |
| spelling | doaj.art-63affd52371a42b4ada0ded3758a99862022-12-22T01:36:35ZengFinnish Society of Forest ScienceSilva Fennica2242-40752017-01-0151410.14214/sf.7753A spectral analysis of 25 boreal tree speciesHovi, AarneRaitio, PekkaRautiainen, MiinaSpectral libraries have a fundamental role in the development of interpretation methods for airborne and satellite-borne remote sensing data. This paper presents to-date the largest spectral measurement campaign of boreal tree species. Reflectance and transmittance spectra of over 600 leaf and needle samples from 25 species were measured in the Helsinki area (Finland) using integrating sphere systems attached to an ASD FieldSpec 4 spectroradiometer. Factors influencing the spectra and red edge inflection point (REIP) were quantified using one-way analysis of variance. Tree species differed most in the shortwave-infrared (1500â2500 nm) and least in the visible (400â700 nm) wavelength region. Species belonging to same genera showed similar spectral characteristics. Upper (adaxial) and lower (abaxial) leaf sides differed most in the visible region. Canopy position (sunlit/shaded) had a minor role in explaining spectral variation. For evergreen conifers, current and previous year needles differed in their spectra, current-year needles resembling those of broadleaved and deciduous conifers. Two broadleaved species were monitored throughout the growing season (MayâOctober), and two conifers were measured twice during summer (June, September). Rapid changes were observed in the spectra in early spring and late autumn, whereas seasonal variations during summer months were relatively small for both broadleaved and coniferous species. Based on our results, shortwave-infrared seems promising in separating tree species, although it is to-date least studied. The spectral library reported here (Version 1.0) is publicly available through the SPECCHIO Spectral Information System.https://www.silvafennica.fi/article/7753 |
| spellingShingle | Hovi, Aarne Raitio, Pekka Rautiainen, Miina A spectral analysis of 25 boreal tree species Silva Fennica |
| title | A spectral analysis of 25 boreal tree species |
| title_full | A spectral analysis of 25 boreal tree species |
| title_fullStr | A spectral analysis of 25 boreal tree species |
| title_full_unstemmed | A spectral analysis of 25 boreal tree species |
| title_short | A spectral analysis of 25 boreal tree species |
| title_sort | spectral analysis of 25 boreal tree species |
| url | https://www.silvafennica.fi/article/7753 |
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