Publikatsioonid

List of publications
Kallel, A. and Nilson, T. (2013). Revisiting the vegetation hot spot modeling: Case of Poisson/Binomial leaf distributions. Remote Sensing of Environment, 130, 188-204.
Nilson, T., Rautiainen, M., Pisek, J., and Peterson, U. (2012). Seasonal Reflectance Courses of Forests. In: Dr. Andrew A. Oteng-Amoako (Ed.), New Advances and Contributions to Forestry Research. InTech, 33-58.
ISBN: 978-953-51-0529-9, Available from:
http://www.intechopen.com/books/new-advances-and-contributions-to-forestry-research/seasonal-reflectance-course-of-forests
Nilson, T., Lang, M., Rautiainen, M., Pisek, J., Peterson, U., Kuusk, A., Kuusk, J., and Eenm?e, A. (2012). Time courses of reflectance for some forest types in Estonia. 1st EARSeL Workshop on Temporal Analysis of Satellite Images. Mykonos, Greece, May 23-25, 2012, 234-239. http://www.earsel.org/SIG/timeseries/pdf/proceedings/proceedings_032.pdf
Eenm?e, A., Nilson, T., and Lang, M. (2011). A note on meteorological variables related trends in the MODIS NPP product for Estonia. Metsanduslikud Uurimused (Forestry Studies), 55, 60-63.
Kodar, A., Lang, M., Arum?e, T., Pisek, J., Nilson, T. (2011). Metsa lehepinnaindeksi kaardistamine lennukilidari, satelliidipiltide ja maapealsete m??tmiste abil J?rvselja VALERI testalal. Metsanduslikud Uurimused (Forestry Studies), 55, 9-30.
Nilson, T., Kuusk, A., Lang, M., Pisek, J., and Kodar, A. (2011). Simulation of statistical characteristics of gap distribution in forest stands. Agricultural and Forest Meteorology, 151(7), 895-905.
Pisek, J., Chen, J.M., and Nilson, T. (2011). Estimation of vegetation clumping index using MODIS BRDF data. International Journal of Remote Sensing, 32(9), 2645?2657.
Pisek, J., Lang, M., Nilson, T., Korhonen, L., and Karu, H. (2011). Comparison of methods for measuring gap size distribution and canopy nonrandomness at J?rvselja RAMI (RAdiation transfer Model Intercomparison) test sites. Agricultural and Forest Meteorology, 151(3), 365-377.
Kuusk, A., Nilson, T., Kuusk, J., and Lang, M. (2010). Reflectance spectra of RAMI forest stands in Estonia: Simulations and measurements. Remote Sensing of Environment, 114(12), 2962-2969.
Ryu, Y., Nilson, T., Kobayashi, H., Sonnentag, O., Law, B.E., and Baldocchi, D.D. (2010). On the correct estimation of effective leaf area index: Does it reveal information on clumping effects? Agricultural and Forest Meteorology, 150(3), 463-472.
Kuusk, A., Kuusk, J., Lang, M., and Nilson, T. (2010). Reflectance spectra of RAMI stands in Estonia. 2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS 2010), Reykjavik, Iceland, June 2010. CD-ROM, 4 pp.
M?nd, P, Hallik, L., Pe?uelas, J., Nilson, T., Duce, P., Emmett, B.A., Beier, C., Estiarte, M., Garadnai, J., Kalapos, T., Schmidt, I.K., Kov?cs-L?ng, E., Prieto, P., Tietema, A., Westerveld, J.W., and Kull, O. (2010) Responses of the reflectance indices PRI and NDVI to experimental warming and drought in European shrublands along a north?south climatic gradient. Remote Sensing of Environment, 114(3), 626-636.
Ryu, Y., Sonnentag, O., Nilson, T., Vargas, R., Kobayashi, H., Wenk, R., and Baldocchi, D.D. (2010). How to quantify tree leaf area index in an open savanna ecosystem: A multi-instrument and multi-model approach. Agricultural and Forest Meteorology, 150(1), 63-76.
Lang, M., Kuusk, A., M?ttus, M., Rautiainen, M., and Nilson, T. (2010). Canopy gap fraction estimation from digital hemispherical images using sky radiance models and a linear conversion method. Agricultural and Forest Meteorology, 150(1), 20-29.
Hallik, L., Kull, O., Nilson, T., and Pe?uelas, J. (2009). Spectral reflectance of multispecies herbaceous and moss canopies in the boreal forest understory and open field. Canadian Journal of Remote Sensing, 35(5), 474-485.
Rautiainen, M., Nilson, T., and L?kk, T. (2009) Seasonal reflectance trends of hemiboreal birch forests. Remote Sensing of Environment, 113(4), 805-815.
Kodar, A., Kutsar, R., Lang, M., L?kk, T., and Nilson, T. (2008) Leaf area indices of forest canopies from optical measurements. Baltic Forestry, 14(2), 185-194.
Nilson, T., Suviste, S., L?kk, T., and Eenm?e, A. (2008) Seasonal reflectance course of some forest types in Estonia from a series of Landsat TM and SPOT images and via simulation. International Journal of Remote Sensing, 29(17-18), 5073?5091.
Rautiainen, M., Lang, M., M?ttus, M., Kuusk, A., Nilson, T., Kuusk, J., and L?kk, T. (2008) Multi-angular reflectance properties of a hemiboreal forest: an analysis using CHRIS PROBA data. Remote Sensing of Environment, 112, 2627-2642.
Kuusk, A., Nilson, T., Paas, M., Lang, M., and Kuusk, J. (2008) Validation of the forest radiative transfer model FRT. Remote Sensing of Environment, 112, 51-58.
Suviste, S., Nilson, T., L?kk, T. and Eenm?e, A. (2007) Seasonal reflectance course of some forest types in Estonia from multi-year LANDSAT TM and SPOT images and via simulation. Proceedings of Multi Temp 2007, 18-20 July, Leuven, Belgium, eds: G.J.M. De Lannoy, R. Hoeben, N.E.C. Verhoest, W.W. Verstraeten, S. Bruneel, P. Coppin, CD-ROM by Katholike Universitet Leuven, 5 pp.
Lang, M., Nilson, T., Kuusk, A., Kiviste, A., and Hordo, M. (2007) The performance of foliage mass and crown radius models in forming the input of a forest reflectance model: A test on forest growth sample plots and Landsat 7 ETM+ images. Remote Sensing of Environment, 110, 445-457.
Kuusk, A., Kuusk, J., Lang, M., L?kk, T., and Nilson, T. (2007) Hyperspectral reflectance of sub-boreal forests measured by CHRIS/PROBA and airborne spectrometer. Proc. ?Envisat Symposium 2007?, Montreux, Switzerland 23?27 April 2007, ESA SP-636, July 2007, 6 pp.
Nilson, T., L?kk, T., Suviste, S., Kadarik, H., and Eenm?e, A. (2007) Calibration of time series of satellite images to study the seasonal course of forest reflectance. Proc. Estonian Acad. Sci. Biol. Ecol., 56(1), 5-18.
Nilson, T., Suviste, S., L?kk, T., and Eenm?e, A. (2006) Seasonal reflectance course of some forest types in Estonia as determined from a series of Landsat TM and SPOT images and via simulation. 2nd International Symposium Recent Advances in Quantitative Remote Sensing, 25/29 September 2006,Torrent (Valencia) Spain, Abstract Book, 70-71.
Eriksson, H.M., Eklundh, L., Kuusk, A., and Nilson, T. (2006) Impact of understory vegetation on forest canopy reflectance and remotely sensed LAI estimates. Remote Sensing of Environment 103(4), 408-418.
Rautiainen, M., Stenberg, P. and Nilson, T. 2005. Estimating canopy cover in Scots pine stands. Silva Fennica, 39 (1):137-142.
Kuusk, A., Lang, M., and Nilson, T. 2004. Simulation of the reflectance of ground vegetation in sub-boreal forests, Agricultural and Forest Meteorology, 126(1-2): 33-46.
Nilson, T. and Kuusk, A. 2004. Improved algorithm for estimating canopy indices from gap fraction data in forest canopies. Agricultural and Forest Meteorology, 124:157-169.
Pinty, B., Widlowski, J.-L., Taberner, M., Gobron, N., Verstraete, M. M., Disney, M., Gascon, F., Gastellu, J.-P., Jiang, L., Kuusk, A., Lewis, P., Li, X., Ni-Meister, W., Nilson, T.,?? North, P., Qin, W., Su, L., Tang, S., Thompson, R., Verhoef, W., Wang, H., Wang, J., Yan, G., and Zang, H. 2004. Radiation Transfer Model Intercomparison (RAMI) exercise: Results from the second phase, J. Geophys. Res., 109(D6): D06210 10.1029/2003JD004252 25 March 2004.
Rautiainen, M., Stenberg, P., Nilson, T., and Kuusk, A. 2004. The effect of crown shape on the reflectance of coniferous stands, Remote Sensing of Environment, 89(1): 41-52.
Nilson, T., Kuusk, A., Lang, M., and L?kk, T. 2003. Forest reflectance modeling: Theoretical aspects and applications, Ambio, 32(8):535-541.
Stenberg, P., Nilson, T., Smolander, H., and Voipio, P. 2003. Gap fraction based estimation of LAI in Scots pine stands subjected to experimental removal of branches and stems, Canadian Journal of Remote Sensing, 29(3):363-370.
Rautiainen, M., Stenberg, P., Nilson, T. Kuusk, A., and Smolander, H. 2003. Application of a forest reflectance model in estimating leaf area of Scots pine stands using Landsat-7 ETM reflectance data, Canadian Journal of Remote Sensing, 29(3): 314-323.
Nilson, T. and Kuusk, A. 2002. Simulation of reflectance spectra in boreal coniferous forest. In: J.A. Sobrino (ed) Proceedings of the First International Symposium on Recent Advances in Quantitative Remote Sensing, Auditori de Torrent, Spain, 16-20 September 2002, Universitat de Val?ncia, 31-38.
Kuusk, A., Nilson, T. and Paas, M. 2002. Angular distribution of radiation beneath forest canopies using a CCD-radiometer. Agricultural and Forest Meteorology, 110:259-273.
Nilson, T. 2001. Satelliidipildid ja metsandus. T?hetorni kalender 2002, T?ravere, 89-97. (in Estonian. Satellite images and forestry)
Kuusk, A. and Nilson, T. 2001. Testing directional properties of a forest reflectance model. J. Geophys. Res. - Atmospheres, 106(D11): 12011-12022.
Nilson, T., Olsson, H., Anniste, J., L?kk, T. and Praks, J. 2001.Thinning-caused change in reflectance of ground vegetation in boreal forest. Int. J. Remote Sensing, 22(14):2763-2776.
Chen, J. M., Li, X., Nilson, T. and? Strahler, A. 2000. Recent advances in geometrical optical modelling and its applications. Remote Sensing Reviews.18 (2-4):227-262.
Nilson, T., Lang, M., Kuusk, A., Anniste, J., and L?kk, T. 2000. Forest reflectance model as an interface between satellite images and forestry databases, In: Zawila-Niedzwiecki, T. and Brach, M., Eds, EUR 19530 - Remote Sensing and Forest Monitoring, Luxembourg: Office for Official Publications of the European Communities, pp. 462-476.
Nilson, T. 2000. Academician Juhan Ross 75. Proceedings of the Estonian Academy of Sciences. Physics, Mathematics, 49(3):190-192.
Kuusk, A. and Nilson, T. 2000. A directional multispectral forest reflectance model. Remote Sensing of Environment, 72(2):244-252.
Nilson, T. 2000. On the use of satellite remote sensing in Estonian forestry and agriculture. Materials of Seminar 'Science to the Society', 3.12.1999. Estonian Academy of Sciences, Tallinn, pp. 5-10 (in Estonian).
Nilson, T. 2000. Kosmilise kaugseire rakendusv?imalusi Eesti metsanduses ja p?llumajanduses. Eesti Teaduste Akadeemia seminari materjalid, 3.12.1999, Tallinn, 5-10 (in Estonian, On the use of satellite remote sensing in Estonian forestry and agriculture).
Nilson, T., Kuusk, A., Lang, M., L?kk, T., Anniste, J., Peterson, U. 1999. Satelliidipiltidel baseeruva metsakorralduse alused. Pidev metsakorraldus. EPM? Metsandusteaduskonna toimetised 32. (Forest management system based on satellite imagery. Transactions of the Faculty of Forestry, Estonian Agric. Univ. no 32), Tartu, pp. 81-87 (in Estonian).
Nilson, T., Kuusk, A., Anniste, J. and Praks, J. 1999. Forest ecosystem radiation model (FERM). Agricultural and Forest Meteorology, 98-99. Documented dataset on appended CD.
Nilson, T., Anniste, J., Lang, M. and Praks, J. 1999. Determination of needle area indices of coniferous forest canopies in the NOPEX region by ground-based optical measurements and satellite images. Agricultural and Forest Meteorology, 98-99:449-462.
Nilson, T. 1999. Inversion of gap frequency data in forest stands. Agricultural and Forest Meteorology, 98-99:437-448.
Nilson, T. Kuusk, A. Leroy, M. 1999. A comparison of forest BDRF simulated by the forest reflectance model and determined by airborne POLDER for some BOREAS sites. Proceedings of ALPS99 Symposium, January 18-22, M?ribel, CNES, 2, WK3-O-07, p. 1-4.
Nilson, T., Kuusk, A., Lang, M., L?kk, T., Anniste, J. 1999. Forest reflectance model as an interface between satellite images and forestry databases. Abstracts IUFRO Remote Sensing and Forest Monitoring Conference (Rogow 99).
Nilson, T., Kuusk, A., Lang, M. and L?kk, T. 1999. Relations between site index and reflectance of forest stands. IUFRO Workshop on Canopy Dynamics and Forest Management - A Missing Link? August 1-11, 1999 in Estonia, Finland and Sweden. Workshop Abstracts, p. 2.
Kuusk, A. and Nilson, T. 1999. A directional multispectral forest reflectance model. Abstracts 2nd International Workshop on Multiangular Measurements and Models, 15-17 September 1999, Ispra (VA) Italy, p. 21-22.
Nilson, T. 1997. A BRDF model for forests. Journal of Remote Sensing, 1: 77-81.
Nilson, T. 1997. Metsanduslike andmebaaside, satelliidi?lesv?tete, metsa heleduse ja kasvumudelite integreerimisest ?htsesse geoinfos?steemi. Eesti P?llumajandus?likool, Teadust??de Kogumik, 189. Metsandus, Tartu, 133-139 (in Estonian, On integrating forestry databases, satellite images, forest reflectance and growth models into a GIS).
Nilson, T. and Ross, J. 1997. Modeling radiative transfer through forest canopies: Implications for canopy photosynthesis and remote sensing. In: (Gholz, H. L., Nakane, K. and Shimoda, H., eds.) The Use of Remote Sensing in the Modeling of Forest Productivity. Kluwer Acad. Publ., Dordrecht, pp. 23-60.
Nilson, T. and Stenberg, P. 1996. Theoretical aspects on radiation submodels used in forest growth models. In: (P.Hari, J. Ross and M. Mecke, eds.) Production Process of Scots Pine; Geographical Variation and Models. Acta Forestalia Fennica, 254: 39-48.
Nilson, T., Kuusk, A., Joffre, R., Lacaze, B., Methy, M. and Peterson, U. 1995. Determination of forest ecosystem parameters by inversion of a forest reflectance model. In: (G. Guyot, ed.), Proc. Int. Colloq. Photosynthesis and Remote Sensing, 28 30 Aug. 1995, Montpellier, NASA, ESA, JRC, INRA, CNES, IFREMER, EARSeL, ISPRS, Montpellier, p. 149 157.?
Nilson, T. and Olsson, H. 1995. Effect of thinning cutting on boreal forest reflectance. Int. J. Remote Sensing, 16: 2963-2968.
Nilson, T. and Peterson, U. 1994. Age dependence of forest reflectance: analysis of main driving factors. Remote Sens. Environ., 48: 319-331.
Nilson, T. 1994. Metsade kaugseire alused. Tartu, Eesti Metsaamet, Eesti P?llumajandus?likool, Metsakorralduse Instituut, 160 lk. (Metsanduslikud mudelid; 1);(in Estonian, Basis of forest remote sensing)
Nilson, T., Peterson, U., P?ivinen, R. 1993. Deviations from normal successional reflectance trajectories in damaged Scots pine stands. In: (G. Preto and B. Koch, eds.) Forest Resource Inventory and Monitoring and Remote Sensing Technology. Proc. IUFRO Centennial Symp, Berlin 27 Aug. 02 Sept. 1992, Japan Society of Forest Planning Press, Tokyo, pp. 151-160.
Nilson, T., Peterson, U. 1993. On the use of remote sensing in monitoring of forest development. In: (?. Mander, J. Fenger, T. Oja, M. Mikk, eds.) Energy, Environment, Natural Resources Management in the Baltic Sea Region. 4th Int. Conf. on System Analysis, Tallinn, Estonia, May 18-21, 1993. Nordiske Seminar Og Arbeidsrapporter 653, pp. 247-255.
Nilson, T., Peterson, U. 1993. Temporal reflectance trajectories of forest communities in Estonia. Annual Report of the Estonian Academy of Sciences 1992, Tallinn, pp.16-17.
Peterson, U. and Nilson, T. 1993, Successional reflectance trajec?tories in northern temperate forests. Int. J. Remote Sensing, 14 (3): 609-613.
Ross,J., Knyazikhin Y., Kuusk A., Marshak A., Nilson T. 1992. Mathematical Modeling of the Solar Radiation Transfer in Plant Canopies. Gidrometeoizdat, St. Petersburg, 195 p. (in Russian).
Nilson, T. 1992. A forest ecosystem radiation model. Int. Radiation Symp. IRS'92, Tallinn, Estonia,3 8 Aug. 1992, Tallinn, 2: 299.
Nilson, T. 1992. Radiative transfer in nonhomogeneous plant canopies. In: (G. Stanhill, ed.) Advances in Bioclimatology, Springer Verlag, 1: 59 88.
Nilson T. 1991. Approximate Analytical Methods for Calculating the Reflection Functions of Leaf Canopies in Remote Sensing Applications. In: (R. B. Myneni and J. Ross, eds.) Photon-Vegetation Interactions: Applications in Optical Remote Sensing and Plant Ecology, Springer-Verlag, Berlin, Heidelberg, p.161-190.
Herbert, T. J. and Nilson, T. 1991. A model of variance of photosynthesis between leaves and maximization of whole plant photosynthesis. Photosynthetica, 25: 597-606.
Nilson, T. 1991. Effect of needle loss on coniferous forest reflectance: a model prediction. 11th Annual Int. Geosci. and Remote Sens. Symp. IGARSS'91 Proceedings, Helsinki University of Technology, Espoo, Finland, June 3 6, 1991, 1543 1546.
Nilson, T. 1991. A forest canopy reflectance model.11th Annual? Int. Geosci. and Remote Sens. Symp. IGARSS'91 Proceedings, Helsinki University of Technology, Espoo, Finland, June 3 6, 1991, 1559 1560.
Nilson, T. 1991. Radiative Transfer in Non homogeneous Plant Canopies. Abstract of Ph.D. Theses, Tartu University, 23 pp.
Nilson T., Peterson U. 1991. A Forest Canopy Reflectance Model and a Test Case. Remote Sens.Environ.,37:131-142.
Nilson, T. 1990. A forest canopy reflectance model. Earth Res. from Space (Sov. J. Remote Sens.), 3:
????? 63 72 (in Russian).
Nilson, T. and Peterson, U. 1990. Testing of a forest reflectance model. In: Aerospace monitoring of boreal forests.(Abstracts of All-Union Conference, Krasnoyarsk, 15-17 ????????????? November 1990) Acad. Sci. USSR, Krasnoyarsk, 110-111.
Kuusk, A. and Nilson, T. 1989. The Reflectance of Shortwave Radiation from Multilayer Plant Canopies, Tallinn, Acad. Sci. ESSR, Preprint A 1(1989), 72 pp.
Nilson, T. and Kuusk, A. 1989. A reflectance model for the plant canopy and its inversion. Remote Sens. Environ., 27: 157 167.
Nilson, T. 1989. Spectral reflectance factors and productivity of forest communities. In: Ecolgy of Northern forests (Abstracts of the symposium, part II). Acad. Sci. USSR, Syktyvkar, p.21 (in Russian)
Nilson, T. A. 1988. Linear transforms of spectral reflectance data in the analysis of crops. Earth Res. from Space (Sov. J. Remote Sens.), 14: 95-103 (in Russian).
Nilson, T. 1988. Spectral-temporal reflectance profiles for some cereals, Tartu, Estonian Acad. Sci. Preprint, A-10: 53 pp.
Nilson, T. and Kuusk, A. 1988. An approximate model to calculate the reflectance factors of vegetation. In: Numerical methods of solving the radiative transfer equation. Acad. Sci. Estonia, Tartu, 1988, 146-149 (in Russian).
Peterson, U., Nilson, T. 1988. Eesti m?nnikute seisundi kaugseire tulemusi. Kaasaegse ?koloogia probleemid, TR?, ELUS ja ELKS Eesti ?koloogiakogu, Tartu, 106-108. (in Estonian, On the state of Estonian pine forests estimated by remote sensing )
Peterson, U. and Nilson, T. 1988. Linear transforms of spectral reflectance data in landscape analysis. In: Structure and landscape ecology of geosystems. Publications of Tartu State University, 808: 34-45 (in Russian).
Ross, Yu. K., Kuusk, A. E., Nilson, T. A. 1988. The bases of quantitative theory of plant cover brightness. In: Photosynthesis and Production Process (ed. A.A. Nichiporovich), Nauka, Moscow, 187-198 (in Russian).
Nilson, T., Roostalu, H., K?dar, J. and Ross, J. 1988. Correlation between barley yield and spectral reflectance at successive growth stages, Earth Res. from Space, 3: 67-73 (in Russian).
Tullus, H. H., Nilson, T. A. and Tamm, Yu. A. 1988. Regime of diffuse radiation in a medium-aged Scots pine forest after thinning. Lesovedeniye, 3, 48-55, (in Russian)
Peterson, U., Kuusk, A., Nilson, T., Pajusalu, P., Ross, J. and Ross, K. 1987. Linear transforms of reflectance factor data in understanding the functioning of forest? biogeozoenosis. Proc. Symp. Experiment and mathematical modelling in studying forest and wetland biogeozoenosis. Moscow, 251-261 (in Russian).
Ross, J., Nilson, T., K?dar, J., Safina, N., Makke, A., Ross, V., Roostalu, H. 1987. Odrak?lvi struktuur, optiliste omaduste ja saagikuse vahelistest seostest. Teaduse saavutusi ja eesrindlikke kogemusi p?llumajanduses, 5: 25-29. (in Estonian, Barley crop structure, relations between optical properties and yield)
Nilson, T. and Ross, J. 1986. A review of models of vegetation spectral reflectance. In: Remote Methods of Studying Agricultural Communities. Leningrad, Gidrometeoizdat, 3-6 (in Russian).
Nilson, T., Anton, J., Kuusk, A., Kydar, J., Ross, J. and Savihhin, A. 1986. Correlation links between radiance properties of some agricultural stands in different spectral regions and their interpretation. In: Remote Methods of Studying Agricultural Communities. Leningrad, Gidrometeoizdat, 66-76 (in Russian).
Ross, J. K., Galinis, A. A., Nilson, T. A. and Ross, K. J. 1986. Effect of liming on soil reflectance. Earth Res. from Space (Sov. J. Remote Sens.), 6: 84-88 (in Russian).
Hari, P., Kaipiainen, L., Korpilahti, E., M?kel?, A., Nilson, T., Oker-Blom, P., Ross, J. and Salminen, R. 1985. Structure, radiation and photosynthetic production in coniferous stands, Univ. Helsinki, Dept. Silvic., Res. Notes 54: 233.
Nilson, T. and Kuusk, A. 1985. Approximate analytic relationships for the reflectance of agricultural vegetation canopies. Earth Res. from Space (Sov. J. Remote Sens.), 4: 814-826 (in Russian).
Nilson, T. 1984. Calculation of the radiation regime of a forest. In: Radiative climatology and applied actinometry. Materials XII Conf. Actinometry, Irkutsk, 179-181 (in Russian).
Kuusk, A., Anton, J., Nilson, T., Peterson, U., Ross, K., Ross, J. and Savihhin, A. 1984. Reflection indicatrices of vegetation covers. Earth Res. from Space, (Sov. J. Remote Sens.),? 5: 68-75 (in Russian).
Hari, P., Nilson, T., Salminen, R., Kaipiainen, L., Korpilahti, E. and Ross, J. 1984. Nonlinear dependence of photosynthetic rate on irradiance and its consequences for estimation of saccharides formed. Photosynthetica, 18(1):28-33.
Salminen, R., Nilson, T., Hari, P., Kaipiainen, L. and Ross, J. 1983. A comparison of different methods for measuring the canopy light regime. J. Applied Ecology, 20: 897-904.
Nilson, T. A., Anton, J. A. and Aplei, V. B. 1983. seasonal course of spectral reflectance coefficients of barley and rye canopies. Earth Res. from Space (Sov. J. Remote Sens.), 5: 72-80 (in Russian).
Nilson, T. A., Anton, J. A., Aplei, V. B., K?dar, J. J., Ross, V. A. and Ross, J. K. 1982. On estimation of cereals maturity stage by remote sensing. Earth Res. from Space (Sov. J. Remote Sens.), 1: 41-47 (in Russian).
Ross, K., Nilson, T. and Ross, J. 1980. A model for calculating the radiation regime in plant canopies. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 12-15 (in Russian).
Nilson, T., Aplei, V., Aho, A., Ross, K. and Ross, J. 1980. A statistical analysis of reflectance factors for some surface types. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 81-84 (in Russian).
Anton, J., Nilson, T., Aplei, V., Aho, A., Ross, K. and Ross, J. 1980. Correlations between radiative temperatures and reflectance factors of some natural objects. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 85-88 (in Russian).
Ross, K., Aplei, V., Aho, A., Nilson, T. and Ross, J. 1980. Reflection indicatrixes of some vegetation types. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 113-116 (in Russian).
Nilson, T. 1980. Calculation of the hot spot effect for forests. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 117-120 (in Russian).
Nilson, T. 1980. Reduction of measured spectral albedos of vegetation to the same sun angle and soil moisture. In: Abstracts of the XI All-Union Conference on Actinometry. Part VII Phytoactinometry. Acad. Sci. USSR, Tallinn, 125-128 (in Russian).
Nilson, T. and Ross, V. 1979. Characterization of the transparency of a forest canopy by fish-eye photographs. In: Spruce Forest Ecosystem Strucure and Ecology , 2, Estonian IBP Report 12, Tartu, 117-130.
Nilson, T. 1978. Mathematical modelling of the radiation regime in plant canopies. In: Abstracts of 6th Conference of All-Union Botanical Society, Kishineu, 12-17 September 1978, Nauka, Leningrad, 270-271 (in Russian)
Kuusk, A., Mullamaa, Yu.-A., Niilisk, H., Nilson, T., Sulev, M. 1978. The structure of the cloud cover in the trade-wind region on the basis of ship measurements. GARP Atlantic Tropical Experiment. Proceedings of the International? scientific conference on the energetics of the tropical atmosphere (Tashkent, 14-21 September 1977), Geneva, WMO,155-160.
Nilson, T. 1977. A theory of radiation penetration into nonhomogeneous plant canopies. In: The Penetration of Solar Radiation into Plant Canopies, Acad. Sci. ESSR Report, Tartu, 5-70 (in Russian).
Nilson, T., Ross, V. and Ross, J. 1977. Some problems on the architecture of plants and plant canopies. In: The penetration of solar radiation into plant canopies. Estonian Acad Sci., Inst. Phys. Astron., Tartu, 71-144 (in Russian).
Nilson, T. 1977. On determination of radiation characteristics in plant canopies by hemispheric photographs. In: Phytoactinometric investigation of mountaneous forests. Academy of Sciences of the USSR, Vladivostok, 45-60 (in Russian).
Nilson, T., Ross, K. and Ross, J. 1976. Remote sensing of plant communities by the statistical analysis of spectral reflectance factors. In: Modern problems and methods in investigations of agro- and microclimate (Conference abstracts). Estonian Geographical Society, Tallinn, 42 (in Russian).
Ross, J. and Nilson, T. 1975. Radiation exchange in plant canopies. In: (De Vries, D.A. and Afgan, N.H., eds.) Heat and Mass Transfer in the Biosphere. P. 1. Transfer Processes in the Plant Environment, Washington, D.C., Scripta Book Company, 327-336.
Nilson, T. 1972. Radiation regime of plant canopy. In: Theoretical basis of photosynthetic productivity, Nauka, Moscow, 420-424 (in Russian).
Nilson, T. 1971. A theoretical analysis of the frequency of gaps in plant stands. Agricult. Meteorol., 8: 25-38.
Nilson, T. 1971. On dispersion of? foliage elements in crop stands. In: Quantitative methods of vegetation study, II. Collected conference reports, Latvian Branch of USSR Botanical Society, Riga, 209-215.
Nilson, T. and Ross, V. 1971. Determination of canopy density by means of photography. In: Biological productivity of spruce forests. Estonian Republican Committee for IBP, Tartu, 129-132.
Laisk, A., Moldau, H., Nilson, T. Ross, J. and Tooming, H. 1971. On the modelling of the productivity of the plant cover. Botanical Journal, 56 (6):761-776 (in Russian)
Niilisk, H., Nilson, T. and Ross, J. 1970. Radiation in plant canopies and its measurement. In: (Setlik, I.ed.) Prediction and measurement of photosynthetic productivity. Pudoc, Wageningen, 165-177.
Ross, J. and Nilson, T. 1968. The calculation of photosynthetically active radiation in plant communities. In: Regime of photosynthetically active radiation in vegetation. Inst. Phys. Astron., Estonian Acad. Sci., Tartu, 5-54 (in Russian).
Nilson, T. 1968. The calculation of spectral fluxes of shortwave radiation in plant communities. In: Regime of photosynthetically active radiation in vegetation. Inst. Phys. Astron., Estonian Acad. Sci., Tartu, 55-80 (in Russian).
Nilson, T. 1968. On the optimum geometrical arrangement of foliage in the plant cover. In: Regime of photosynthetically active radiation in vegetation. Inst. Phys. Astron., Estonian Acad. Sci., Tartu, 112-146 (in Russian).
Ross, J. K. and Nilson, T. A. 1968. A mathematical model of radiation regime of the plant cover. In: Actinometry and Atmospheric Optics. Tallinn, Valgus, 263-281 (in Russian).
Nilson, T. A. 1968. Mathematial modelling of the radiation regime of plant cover. Abstract of Candidate (Ph D) theses. Tartu University, Tartu, 27 pp. (in Russian)
Ross, J. and Nilson, T. 1967. Radiation regime of vegetation with horizontal leaves. In: Phytoactinometrical Investigations of Vegetation. Tallinn, Valgus, 5-34 (in Russian).
Tooming, H. and Nilson, T. 1967. Basis of energetic adaptation of vegetation on light. In: Phytoactinometrical Investigations of Vegetation. Tallinn, Valgus, 35-63 (in Russian).
Ross, J. and Nilson, T. 1966. Vertical distribution of biomass in agricultural crops. In: Photosynthetic systems of high productivity. Nauka, Moscow, 96-108 (in Russian).
Ross, J. and Nilson, T. 1966. Spatial orientation of leaves in crops and methods of its determination. In: Photosynthetic systems of high productivity. Nauka, Moscow, 109-125 (in Russian).
Ross, J. and Nilson, T. 1965. Penetration of direct solar radiation in agricultural crops. Problems of radiation regime of plant canopies. Inst. Phys. Astron., Estonian Acad. Sci., Tartu, 25-64 (in Russian).
Ross, J. and Nilson, T. 1963. On the theory of radiation regime of plant cover. In: Investigations of Atmospheric Physics, 4, 42-63 (in Russian).