Timo Vesala

Summary

Affiliation: University of Helsinki
Country: Finland

Publications

  1. ncbi request reprint Flux and concentration footprint modelling: state of the art
    T Vesala
    Department of Physical Sciences, University of Helsinki, PO Box 64, FIN 00014 Helsinki, Finland
    Environ Pollut 152:653-66. 2008
  2. ncbi request reprint Refilling of a hydraulically isolated embolized xylem vessel: model calculations
    Timo Vesala
    Department of Physical Sciences, PO Box 64, FIN 00014, University of Helsinki, Finland
    Ann Bot 91:419-28. 2003
  3. doi request reprint Assimilate transport in phloem sets conditions for leaf gas exchange
    Eero Nikinmaa
    Departments of Forest Sciences, University of Helsinki, Helsinki FI 00014, Finland
    Plant Cell Environ 36:655-69. 2013
  4. ncbi request reprint The dependence of the beta coefficient of REA system with dynamic deadband on atmospheric conditions
    Tiia Grönholm
    Department of Physical Sciences, University of Helsinki, P O Box 64, FIN 00014, Finland
    Environ Pollut 152:597-603. 2008
  5. ncbi request reprint CO2 fluxes near a forest edge: a numerical study
    Andrey Sogachev
    Department of Physics, University of Helsinki, P O Box 64, Helsinki FI 00014, Finland
    Ecol Appl 18:1454-69. 2008
  6. ncbi request reprint Nitrous oxide emissions from a municipal landfill
    Janne Rinne
    Department of Physical Sciences, P O B 68, FI 00014 University of Helsinki, Finland
    Environ Sci Technol 39:7790-3. 2005
  7. ncbi request reprint Atmospheric science: Ultraviolet light and leaf emission of NO(x)
    Pertti Hari
    Department of Forest Ecology, University of Helsinki, 00014 Helsinki, Finland
    Nature 422:134. 2003
  8. ncbi request reprint Temperature dependence of leaf-level CO2 fixation: revising biochemical coefficients through analysis of leaf three-dimensional structure
    Eija Juurola
    University of Helsinki, Department of Forest Ecology, PO Box 27, FIN 00014 University of Helsinki, Finland
    New Phytol 166:205-15. 2005
  9. ncbi request reprint Wintertime photosynthesis and water uptake in a boreal forest
    Sanna Sevanto
    Department of Physical Sciences, P O Box 64, 00014 University of Helsinki, Finland
    Tree Physiol 26:749-57. 2006
  10. ncbi request reprint Modeling the dynamics of pressure propagation and diameter variation in tree sapwood
    Martti Perämäki
    Department of Forest Ecology, University of Helsinki, P O Box 27, 00014 University of Helsinki, Finland
    Tree Physiol 25:1091-9. 2005

Detail Information

Publications13

  1. ncbi request reprint Flux and concentration footprint modelling: state of the art
    T Vesala
    Department of Physical Sciences, University of Helsinki, PO Box 64, FIN 00014 Helsinki, Finland
    Environ Pollut 152:653-66. 2008
    ..The estimation of footprints for application in the real world, complete with a multitude of interesting gaseous and particulate substances, remains a complex problem...
  2. ncbi request reprint Refilling of a hydraulically isolated embolized xylem vessel: model calculations
    Timo Vesala
    Department of Physical Sciences, PO Box 64, FIN 00014, University of Helsinki, Finland
    Ann Bot 91:419-28. 2003
    ..95) and the ratio of the volume of the adjacent living cells to that of the embolized vessel is about 2, does the osmotic potential stay below 0.4 MPa...
  3. doi request reprint Assimilate transport in phloem sets conditions for leaf gas exchange
    Eero Nikinmaa
    Departments of Forest Sciences, University of Helsinki, Helsinki FI 00014, Finland
    Plant Cell Environ 36:655-69. 2013
    ..It produces similar behaviour as the optimal stomatal control approach, but does not require determination of marginal cost of water parameter...
  4. ncbi request reprint The dependence of the beta coefficient of REA system with dynamic deadband on atmospheric conditions
    Tiia Grönholm
    Department of Physical Sciences, University of Helsinki, P O Box 64, FIN 00014, Finland
    Environ Pollut 152:597-603. 2008
    ..42+/-0.03. For a single half-hour measurement one has to consider the large uncertainty of +/-0.2. According to our study, the dynamic deadband enables the use of a constant value of beta in flux calculation...
  5. ncbi request reprint CO2 fluxes near a forest edge: a numerical study
    Andrey Sogachev
    Department of Physics, University of Helsinki, P O Box 64, Helsinki FI 00014, Finland
    Ecol Appl 18:1454-69. 2008
    ..These results can be useful both for interpretation of existing measurements of net ecosystem exchange of CO2 (NEE) from flux towers in limited fetch conditions and in planning future CO2 transport experiments...
  6. ncbi request reprint Nitrous oxide emissions from a municipal landfill
    Janne Rinne
    Department of Physical Sciences, P O B 68, FI 00014 University of Helsinki, Finland
    Environ Sci Technol 39:7790-3. 2005
    ..The emissions measured by the two systems were generally of similar magnitude, with enclosure measurements showing a high small-scale spatial variation...
  7. ncbi request reprint Atmospheric science: Ultraviolet light and leaf emission of NO(x)
    Pertti Hari
    Department of Forest Ecology, University of Helsinki, 00014 Helsinki, Finland
    Nature 422:134. 2003
  8. ncbi request reprint Temperature dependence of leaf-level CO2 fixation: revising biochemical coefficients through analysis of leaf three-dimensional structure
    Eija Juurola
    University of Helsinki, Department of Forest Ecology, PO Box 27, FIN 00014 University of Helsinki, Finland
    New Phytol 166:205-15. 2005
    ..The influence of three-dimensional leaf structure on the light environment inside a leaf is marked and affects the local choice between Jmax and V c(max)-limited assimilation rates...
  9. ncbi request reprint Wintertime photosynthesis and water uptake in a boreal forest
    Sanna Sevanto
    Department of Physical Sciences, P O Box 64, 00014 University of Helsinki, Finland
    Tree Physiol 26:749-57. 2006
    ..The more difficult it was to access soil water because of low Ts or low theta, the longer the trees used water stored in their stems. Even partial stem freezing did not prevent photosynthesis or soil water uptake...
  10. ncbi request reprint Modeling the dynamics of pressure propagation and diameter variation in tree sapwood
    Martti Perämäki
    Department of Forest Ecology, University of Helsinki, P O Box 27, 00014 University of Helsinki, Finland
    Tree Physiol 25:1091-9. 2005
    ..The effect of tree dimensions on pressure propagation was examined with the model. The model outcomes were also consistent with results of several field measurements presented in the literature...
  11. ncbi request reprint Plant-mediated nitrous oxide emissions from beech (Fagus sylvatica) leaves
    Mari Pihlatie
    Department of Physical Sciences, University of Helsinki, FIN 00014 Helsinki, Finland
    New Phytol 168:93-8. 2005
    ..Our experiments demonstrate the existence of a previously overlooked pathway of N2O to the atmosphere in forest ecosystems, and bring about a need to investigate the magnitude of this phenomenon at larger scales...
  12. ncbi request reprint Micrometeorological measurements of methane and carbon dioxide fluxes at a municipal landfill
    Annalea Lohila
    Climate and Global Change Research, Finnish Meteorological Institute, P O Box 503, FI 00101 Helsinki, Finland
    Environ Sci Technol 41:2717-22. 2007
    ..24) when the emission originated from the area with no oxidizing cover layer and being smaller when CH4 oxidation had taken place...
  13. doi request reprint Net carbon dioxide losses of northern ecosystems in response to autumn warming
    Shilong Piao
    LSCE, UMR CEA CNRS, Bâtiment 709, CE, L Orme des Merisiers, F 91191 Gif sur Yvette, France
    Nature 451:49-52. 2008
    ..If future autumn warming occurs at a faster rate than in spring, the ability of northern ecosystems to sequester carbon may be diminished earlier than previously suggested...