Generating fine resolution leaf area index maps for boreal forests of Finland

Janne Heiskanen; Miina Rautiainen; Lauri Korhonen; Matti Mõttus; Pauline Stenberg

doi:10.1109/IGARSS.2011.6049675

Generating fine resolution leaf area index maps for boreal forests of Finland

Janne Heiskanen, Miina Rautiainen, Lauri Korhonen, Matti Mõttus, Pauline Stenberg

Not published at VTT

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

7 Citations (Scopus)

Abstract

In addition to global-scale LAI products, higher resolution maps are needed to better depict the spatial heterogeneity of LAI. In this study, we applied empirical and forest reflectance model based LAI estimation methods to generate fine-resolution LAI maps for boreal forests of Finland. The countrywide satellite image mosaics at 25 m resolution for the years 2000 and 2006 were used as input satellite data. The Reduced Simple Ratio (RSR) vegetation index based approach performed better in estimating effective LAI (L_e) than forest reflectance model based approach. The final L_e estimates were corrected for shoot-level clumping in coniferous and mixed forests according to the land cover maps. The L_e estimates show good agreement with LAI field measurements over the modeling sites although the largest values are slightly underestimated. MODIS LAI V005 estimates are higher than the upscaled 1 km resolution forest LAI estimates for 2006.

Original language	English
Title of host publication	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings
Pages	2326-2329
Number of pages	4
DOIs	https://doi.org/10.1109/IGARSS.2011.6049675
Publication status	Published - 16 Nov 2011
MoE publication type	A4 Article in a conference publication
Event	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Vancouver, BC, Canada Duration: 24 Jul 2011 → 29 Jul 2011

Conference

Conference	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011
Abbreviated title	IGARSS 2011
Country/Territory	Canada
City	Vancouver, BC
Period	24/07/11 → 29/07/11

Keywords

Ecosystems
Forestry

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10.1109/IGARSS.2011.6049675

Cite this

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title = "Generating fine resolution leaf area index maps for boreal forests of Finland",

abstract = "In addition to global-scale LAI products, higher resolution maps are needed to better depict the spatial heterogeneity of LAI. In this study, we applied empirical and forest reflectance model based LAI estimation methods to generate fine-resolution LAI maps for boreal forests of Finland. The countrywide satellite image mosaics at 25 m resolution for the years 2000 and 2006 were used as input satellite data. The Reduced Simple Ratio (RSR) vegetation index based approach performed better in estimating effective LAI (Le) than forest reflectance model based approach. The final Le estimates were corrected for shoot-level clumping in coniferous and mixed forests according to the land cover maps. The Le estimates show good agreement with LAI field measurements over the modeling sites although the largest values are slightly underestimated. MODIS LAI V005 estimates are higher than the upscaled 1 km resolution forest LAI estimates for 2006.",

keywords = "Ecosystems, Forestry",

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booktitle = "2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings",

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Heiskanen, J, Rautiainen, M, Korhonen, L, Mõttus, M & Stenberg, P 2011, Generating fine resolution leaf area index maps for boreal forests of Finland. in 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings., 6049675, pp. 2326-2329, 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011, Vancouver, BC, Canada, 24/07/11. https://doi.org/10.1109/IGARSS.2011.6049675

Generating fine resolution leaf area index maps for boreal forests of Finland. / Heiskanen, Janne; Rautiainen, Miina; Korhonen, Lauri et al.
2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings. 2011. p. 2326-2329 6049675.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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AU - Heiskanen, Janne

AU - Rautiainen, Miina

AU - Korhonen, Lauri

AU - Mõttus, Matti

AU - Stenberg, Pauline

PY - 2011/11/16

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N2 - In addition to global-scale LAI products, higher resolution maps are needed to better depict the spatial heterogeneity of LAI. In this study, we applied empirical and forest reflectance model based LAI estimation methods to generate fine-resolution LAI maps for boreal forests of Finland. The countrywide satellite image mosaics at 25 m resolution for the years 2000 and 2006 were used as input satellite data. The Reduced Simple Ratio (RSR) vegetation index based approach performed better in estimating effective LAI (Le) than forest reflectance model based approach. The final Le estimates were corrected for shoot-level clumping in coniferous and mixed forests according to the land cover maps. The Le estimates show good agreement with LAI field measurements over the modeling sites although the largest values are slightly underestimated. MODIS LAI V005 estimates are higher than the upscaled 1 km resolution forest LAI estimates for 2006.

AB - In addition to global-scale LAI products, higher resolution maps are needed to better depict the spatial heterogeneity of LAI. In this study, we applied empirical and forest reflectance model based LAI estimation methods to generate fine-resolution LAI maps for boreal forests of Finland. The countrywide satellite image mosaics at 25 m resolution for the years 2000 and 2006 were used as input satellite data. The Reduced Simple Ratio (RSR) vegetation index based approach performed better in estimating effective LAI (Le) than forest reflectance model based approach. The final Le estimates were corrected for shoot-level clumping in coniferous and mixed forests according to the land cover maps. The Le estimates show good agreement with LAI field measurements over the modeling sites although the largest values are slightly underestimated. MODIS LAI V005 estimates are higher than the upscaled 1 km resolution forest LAI estimates for 2006.

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BT - 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings

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Generating fine resolution leaf area index maps for boreal forests of Finland

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