<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The space-borne Moderate Resolution Imaging Spectroradiometer (MODIS) data based net primary production (NPP) product from Numerical Terradynamic Simulation Group (NTSG) was tested in the Kurzeme region, Latvia using a stand-wise forest inventory database. The NPP product has been validated globally and found to have no overall bias. In this study the NPP product was compared with stem biomass increment and soil fertility in respect to distance from the Baltic Sea coast. For each MODIS NPP product pixel we calculated forest cover, share of coniferous trees, average stem biomass increment and average site fertility (growth potential estimate). Then, 2432 pixels with a forest cover over 75% were selected for analysis. The results indicated that MODIS NPP decreased with distance from Baltic Sea coast but stem biomass increment and site fertility indicated a trend of increase. There was no functional relationship between MODIS NPP and stem biomass increment. Analysis of the landcover map used by NTSG for MODIS NPP product showed that the classes “Evergreen needleleaf” and “Mixed forests” differentiated only 10% by mode value of coniferous proportions in species composition. A non-natural jump was detected in the MODIS NPP values at a longitude of 22.5 degrees east corresponding to the border of the coarse scale meteorological dataset (NCEP Reanalysis (R2)) data representation unit. According to the results the MODIS NPP product is not applicable for regional level planning but can probably provide only rough average estimates of NPP for the Baltic region</p></abstract>

The space-borne Moderate Resolution Imaging Spectroradiometer (MODIS) data based net primary production (NPP) product from Numerical Terradynamic Simulation Group (NTSG) was tested in the Kurzeme region, Latvia using a stand-wise forest inventory database. The NPP product has been validated globally and found to have no overall bias. In this study the NPP product was compared with stem biomass increment and soil fertility in respect to distance from the Baltic Sea coast. For each MODIS NPP product pixel we calculated forest cover, share of coniferous trees, average stem biomass increment and average site fertility (growth potential estimate). Then, 2432 pixels with a forest cover over 75% were selected for analysis. The results indicated that MODIS NPP decreased with distance from Baltic Sea coast but stem biomass increment and site fertility indicated a trend of increase. There was no functional relationship between MODIS NPP and stem biomass increment. Analysis of the landcover map used by NTSG for MODIS NPP product showed that the classes “Evergreen needleleaf” and “Mixed forests” differentiated only 10% by mode value of coniferous proportions in species composition. A non-natural jump was detected in the MODIS NPP values at a longitude of 22.5 degrees east corresponding to the border of the coarse scale meteorological dataset (NCEP Reanalysis (R2)) data representation unit. According to the results the MODIS NPP product is not applicable for regional level planning but can probably provide only rough average estimates of NPP for the Baltic region

Assessment of NTSG MODIS NPP product for forests in Kurzeme region, Latvia / Kuramaa metsade primaarproduktsiooni hindamisest NTSG MODIS NPP andmestiku abil

Tartu Observatory, 61602 Tõravere, Tartumaa, Estonia

Institute of Forestry and Rural Engineering, Estonian University of Life Sciences

Forestry Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The space-borne Moderate Resolution Imaging Spectroradiometer (MODIS) data based net primary production (NPP) product from Numerical Terradynamic Simulation...

Assessment of NTSG MODIS NPP product for forests in Kurzeme region, Latvia / Kuramaa metsade primaarproduktsiooni hindamisest NTSG MODIS NPP andmestiku abil

Published Online: Sep 19, 2014

Page range: 26 - 36

Received: Oct 04, 2013

Accepted: Jan 23, 2014

DOI: https://doi.org/10.2478/fsmu-2013-0003

Keywords
MODIS NPP, validation, Baltic region, forest

© 2014

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Assessment of NTSG MODIS NPP product for forests in Kurzeme region, Latvia / Kuramaa metsade primaarproduktsiooni hindamisest NTSG MODIS NPP andmestiku abil

Published Online: Sep 19, 2014

Page range: 26 - 36

Received: Oct 04, 2013

Accepted: Jan 23, 2014

DOI: https://doi.org/10.2478/fsmu-2013-0003

KeywordsMODIS NPP, validation, Baltic region, forest

© 2014

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
MODIS NPP, validation, Baltic region, forest