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Remote Sens. 2015, 7(4), 3878-3906; doi:10.3390/rs70403878

Comparing MODIS Net Primary Production Estimates with Terrestrial National Forest Inventory Data in Austria

1
Institute of Silviculture, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna, Peter-Jordan-Str. 82, A-1190 Vienna, Austria
2
Department of Geographical Sciences, University of Maryland, College Park, MD 20742, USA
3
Natural Hazards and Landscape, Department of Forest Growth and Silviculture, Federal Research and Training Centre for Forests, Vienna, Seckendorff-Gudent-Weg 8, A-1130 Vienna, Austria
*
Author to whom correspondence should be addressed.
Academic Editors: Randolph H. Wynne and Prasad S. Thenkabail
Received: 11 December 2014 / Revised: 12 March 2015 / Accepted: 17 March 2015 / Published: 1 April 2015
View Full-Text   |   Download PDF [1594 KB, uploaded 2 April 2015]   |  

Abstract

The mission of this study is to compare Net Primary Productivity (NPP) estimates using (i) forest inventory data and (ii) spatio-temporally continuous MODIS (MODerate resolution Imaging Spectroradiometer) remote sensing data for Austria. While forest inventories assess the change in forest growth based on repeated individual tree measurements (DBH, height etc.), the MODIS NPP estimates are based on ecophysiological processes such as photosynthesis, respiration and carbon allocation. We obtained repeated national forest inventory data from Austria, calculated a “ground-based” NPP estimate and compared the results with “space-based” MODIS NPP estimates using different daily climate data. The MODIS NPP estimates using local Austrian climate data exhibited better compliance with the forest inventory driven NPP estimates than the MODIS NPP predictions using global climate data sets. Stand density plays a key role in addressing the differences between MODIS driven NPP estimates versus terrestrial driven inventory NPP estimates. After addressing stand density, both results are comparable across different scales. As forest management changes stand density, these findings suggest that management issues are important in understanding the observed discrepancies between MODIS and terrestrial NPP. View Full-Text
Keywords: forest; NPP; management; inventory; MODIS; Austria forest; NPP; management; inventory; MODIS; Austria
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Neumann, M.; Zhao, M.; Kindermann, G.; Hasenauer, H. Comparing MODIS Net Primary Production Estimates with Terrestrial National Forest Inventory Data in Austria. Remote Sens. 2015, 7, 3878-3906.

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