[Baret, F., Bacour, C., Béal, D.,Weiss, M., Berthelot, B., Regner, P. 2006. Algorithm Theoretical Basis Document for MERIS Top of canopy Land Products (TOC_VEG), version 3. INRA-CSE, Avignon.]Search in Google Scholar
[Caldararu, S., Purves, D.W., Palmer, P.I. 2013. Phenology as a strategy for carbon optimality: a global model. - Biogeosciences Discussions, 10, 15107-15151.]Search in Google Scholar
[Chen, J.M. 1996. Optically-based methods for measuring seasonal variation of leaf area index in boreal conifer stands. - Agricultural and Forest Meteorology, 80(2-4), 135-163.]Search in Google Scholar
[Climate Normals. 2015. Climate Normals, 1981-2010. Web page of Estonian Weather Service. [WWW Document]. - URL http://www.ilmateenistus.ee/kliima/kliimanormid/ohuniiskus/?lang=en [Accessed 15 October 2014].]Search in Google Scholar
[De Beurs, K.M., Henebry, G.M. 2010. Spatio-temporal statistical methods for modeling land surface phenology. - Hudson, I.L., Keatley, M.R. (eds.). Phenological Research. Methods for Environmental and Climate Change Analysis. Springer Books, New York.10.1007/978-90-481-3335-2_9]Search in Google Scholar
[Eenmäe, A., Nilson, T., Lang, M. 2011. A note on meteorological variables related trends in the MODIS NPP product for Estonia. - Forestry Studies / Metsanduslikud Uurimused, 55, 58-61.]Search in Google Scholar
[Friend, A.D., Stevens, A.K., Knox, R.G., Cannell, M.G.R. 1995. A process-based terrestrial biosphere model of ecosystem dynamics (Hybrid v3.0). - Ecological Modelling, 95, 249-287.]Search in Google Scholar
[Gobron, N., Aussedat, O., Pinty, B., Taberner, M., Verstraete, M. 2004. Medium Resolution Imaging Spectrometer (MERIS). Level 2 Land Surface Products. Algorithm Theoretical Basis Document. Institute of Environmental Sustainability JRC, Publication No. EUR 21387 EN.]Search in Google Scholar
[Heinsch, F.A., Reeves, M., Votava, P., Kang, S., Milesi, C., Zhao, M., Glassy, J., Jolly,W.M., Loehman, R., Bowker, C.F., Kimball, J.S., Nemani, R.R., Running, S.W. 2003. User’s guide: GPP and NPP (MOD17A2/A3) products. NASA MODIS land algorithm. Version 2.0, 1-57.]Search in Google Scholar
[Jönsson, P., Eklundh, L. 2002. Seasonality extraction by function fi tting to time series of satellite sensor data. - IEEE Transactions on Geoscience and Remote Sensing, 40, 1824−1832.]Search in Google Scholar
[Kadaja, J., Keppart, L. 2014. Analysis of weather conditions. Estonian Ministry of environment. Contract no. 4-1.1/14/25 report. [WWW Document]. - URL http://www.envir.ee/sites/default/files/vaetiste_laotamise_optimaalse_sugisese_ajalise_piirangu_eksperthinnang.pdf [Accessed 1 September 2014]. (In Estonian).]Search in Google Scholar
[Keenan, T.F., Baker, I., Barr, A., Ciais, P., Davis, K., Dietze, M., Dragoni, D., Gough, C.M., Grant, R., Hollinger, D., Hufkens, K., Poulter, B., Mc- Caughey, H., Raczka, B., Ryu, Y. Schaefer, K., Tian, H., Verbeeck, H., Zhao, M., Richardson, A.D. 2012. Terrestrial biosphere model performance for inter-annual variability of land-atmosphere CO2 exchange. - Global Change Biology, 18, 1971-1987.]Search in Google Scholar
[Kucharik, C.J., Foley, J.A., Delire, C., Fisher, V.A., Coe, M.T., Lenters, J.D., Young-Molling, C., Ramankutty, N., Norman, J.M., Gower. S.T. 2000. Testing the performance of a Dynamic Global Ecosystem Model: Water balance, carbon balance, and vegetation structure. - Global Biogeochemical Cycles, 14(3), 795-825.]Search in Google Scholar
[Lang, M., Traškovs, A., Gulbe, L. 2013. Assessment of NTSG MODIS NPP product for forests in Kurzeme region, Latvia. - Forestry Studies / Metsanduslikud Uurimused, 58, 26-36.]Search in Google Scholar
[McMaster, G.S., Wilhelm, W.W. 1997. Growing degree- days: one equation, two interpretations. - Agricultural and Forest Meteorology, 87, 291-300.]Search in Google Scholar
[Monteith, J. 1972. Solar radiation and productivity in tropical ecosystems. - Journal of Applied Ecology, 9, 747-766.]Search in Google Scholar
[Monteith, J. 1977. Climate and effi ciency of crop production in Britain. - Philosophical Transactions of the Royal Society of London. Ser. B, 277-294.]Search in Google Scholar
[Mu, Q., Zhao, M., Heinsh, F.A., Liu, M., Tian, H., Running, S.W. 2007. Evaluating water stress controls on primary production in biogeochemical and remote sensing based models. - Journal of Geophysical Research, vol. 112, G01012, doi:10.1029/2006JG000179.10.1029/2006JG000179]Search in Google Scholar
[Nilson, T., Rennel, M., Luhamaa, A., Hordo, M., Olesk, A., Lang, M. 2012. MERIS GPP/NPP product for Estonia: I. Algorithm and preliminary results of simulation. - Forestry Studies / Metsanduslikud Uurimused, 56, 56-78.]Search in Google Scholar
[Nilson, T., Lang, M., Lükk, T., Eenmäe, A. 2008. Remote sensing of forest productivity. - Väljataga, K., Kaukver, K. (eds.). Kaugseire Eestis. (Remote Sensing in Estonia). Tartu Observatoorium, Keskkonnaministeeriumi Info- ja Tehnokeskus, Tallinn, 78-90. (In Estonian).]Search in Google Scholar
[Ross, J. 1981. The radiation regime and architecture of plant stands. Junk Publ., The Netherlands, 391 pp.10.1007/978-94-009-8647-3]Search in Google Scholar
[Russak, V., Kallis, A. 2003. Eesti kiirguskliima teatmik (Handbook of Estonian Solar Radiation Climate). EMHI, Tallinn, 384 pp. (In Estonian).]Search in Google Scholar
[Schwalm, C.R. et al. 2010. A model-data intercomparison of CO2 exchange across North America: Results from the North American Carbon Program site synthesis. - Journal of Geophysical Research: Biogeosciences (2005-2012), 115, Issue G3, doi:10.1029/2009JG001229.10.1029/2009JG001229]Search in Google Scholar
[Sitch, S., Smith, B., Prentice, I.C., Arneth, A., Bondeau, A., Cramer, W., Kaplan, J.O., Levis, S., Lucht, W., Sykes, M.T., Thonicke, K., Venevsky, S. 2003. Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ Dynamic Global Vegetation Model. -Global Change Biology, 9, 161-185.]Search in Google Scholar
[Sveshnikov, A.A. 1968. Problems in probability theory, mathematical statistics and theory of random functions. Dover Publications, NY. 501 pp.]Search in Google Scholar
[Tarand, A., Jaagus, J., Kallis, A. 2013. Eesti kliima minevikus ja tänapäeval. (Estonian climate in the past and today). Tartu, Tartu Ülikooli Kirjastus. (In Estonian).]Search in Google Scholar
[Turner, D.P., Ollinger, S., Smith, M.-L., Krankina, O., Gregory, M. 2004. Scaling net primary production to a MODIS footprint in support of Earth observing system product validation. - International Journal of Remote Sensing, 25 (10), 1961-1979.]Search in Google Scholar
[Vanninen, P., Mäkelä, A. 1999. Fine root biomass of Scots pine stands differing in age and soil fertility in southern Finland. - Tree Physiology, 19, 823-830 T. Nilson et al. 10.1093/treephys/19.12.82310562399]Search in Google Scholar