Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland
The structure and function of northern ecosystems are strongly influenced by climate change and variability and by human-induced disturbances. The projected global change is likely to have a pronounced effect on the distribution and productivity of different species, generating large changes in the...
Main Author: | |
---|---|
Other Authors: | , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Helsingin yliopisto
2010
|
Subjects: | |
Online Access: | http://hdl.handle.net/10138/21173 |
id |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/21173 |
---|---|
record_format |
openpolar |
spelling |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/21173 2023-08-20T04:08:42+02:00 Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland Ilmaston alueellinen vaihtelu sekä häiriötekijöiden vaikutus paikallisilmastoon ja metsän uudistumiseen Pohjois-Suomessa Vajda, Andrea Holtmeier, Friedrich-Karl University of Helsinki, Faculty of Science, Department of Geography Finnish Meteorological Institute Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta, maantieteen laitos Helsingfors universitet, matematisk-naturvetenskapliga fakulteten, geografiska institutionen Seppälä, Matti Venäläinen, Ari 2010-11-25T12:06:01Z application/pdf http://hdl.handle.net/10138/21173 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-951-697-629-0 Helsinki: Finnish Meteorological Institute, 2007, Finnish Meteorological Institute Contributions . 0782-6117 http://hdl.handle.net/10138/21173 URN:ISBN:978-952-10-4187-7 Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. maantiede Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2010 ftunivhelsihelda 2023-07-28T06:17:30Z The structure and function of northern ecosystems are strongly influenced by climate change and variability and by human-induced disturbances. The projected global change is likely to have a pronounced effect on the distribution and productivity of different species, generating large changes in the equilibrium at the tree-line. In turn, movement of the tree-line and the redistribution of species produce feedback to both the local and the regional climate. This research was initiated with the objective of examining the influence of natural conditions on the small-scale spatial variation of climate in Finnish Lapland, and to study the interaction and feedback mechanisms in the climate-disturbances-vegetation system near the climatological border of boreal forest. The high (1 km) resolution spatial variation of climate parameters over northern Finland was determined by applying the Kriging interpolation method that takes into account the effect of external forcing variables, i.e., geographical coordinates, elevation, sea and lake coverage. Of all the natural factors shaping the climate, the geographical position, local topography and altitude proved to be the determining ones. Spatial analyses of temperature- and precipitation-derived parameters based on a 30-year dataset (1971-2000) provide a detailed description of the local climate. Maps of the mean, maximum and minimum temperatures, the frost-free period and the growing season indicate that the most favourable thermal conditions exist in the south-western part of Lapland, around large water bodies and in the Kemijoki basin, while the coldest regions are in highland and fell Lapland. The distribution of precipitation is predominantly longitudinally dependent but with the definite influence of local features. The impact of human-induced disturbances, i.e., forest fires, on local climate and its implication for forest recovery near the northern timberline was evaluated in the Tuntsa area of eastern Lapland, damaged by a widespread forest fire in 1960 and suffering ... Doctoral or Postdoctoral Thesis Northern Finland Lapland Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Kemijoki ENVELOPE(24.500,24.500,65.783,65.783) Tuntsa ENVELOPE(29.696,29.696,67.597,67.597) |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
maantiede |
spellingShingle |
maantiede Vajda, Andrea Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
topic_facet |
maantiede |
description |
The structure and function of northern ecosystems are strongly influenced by climate change and variability and by human-induced disturbances. The projected global change is likely to have a pronounced effect on the distribution and productivity of different species, generating large changes in the equilibrium at the tree-line. In turn, movement of the tree-line and the redistribution of species produce feedback to both the local and the regional climate. This research was initiated with the objective of examining the influence of natural conditions on the small-scale spatial variation of climate in Finnish Lapland, and to study the interaction and feedback mechanisms in the climate-disturbances-vegetation system near the climatological border of boreal forest. The high (1 km) resolution spatial variation of climate parameters over northern Finland was determined by applying the Kriging interpolation method that takes into account the effect of external forcing variables, i.e., geographical coordinates, elevation, sea and lake coverage. Of all the natural factors shaping the climate, the geographical position, local topography and altitude proved to be the determining ones. Spatial analyses of temperature- and precipitation-derived parameters based on a 30-year dataset (1971-2000) provide a detailed description of the local climate. Maps of the mean, maximum and minimum temperatures, the frost-free period and the growing season indicate that the most favourable thermal conditions exist in the south-western part of Lapland, around large water bodies and in the Kemijoki basin, while the coldest regions are in highland and fell Lapland. The distribution of precipitation is predominantly longitudinally dependent but with the definite influence of local features. The impact of human-induced disturbances, i.e., forest fires, on local climate and its implication for forest recovery near the northern timberline was evaluated in the Tuntsa area of eastern Lapland, damaged by a widespread forest fire in 1960 and suffering ... |
author2 |
Holtmeier, Friedrich-Karl University of Helsinki, Faculty of Science, Department of Geography Finnish Meteorological Institute Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta, maantieteen laitos Helsingfors universitet, matematisk-naturvetenskapliga fakulteten, geografiska institutionen Seppälä, Matti Venäläinen, Ari |
format |
Doctoral or Postdoctoral Thesis |
author |
Vajda, Andrea |
author_facet |
Vajda, Andrea |
author_sort |
Vajda, Andrea |
title |
Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
title_short |
Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
title_full |
Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
title_fullStr |
Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
title_full_unstemmed |
Spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern Finland |
title_sort |
spatial variation of climate and the impact of disturbances on local climate and forest recovery in northern finland |
publisher |
Helsingin yliopisto |
publishDate |
2010 |
url |
http://hdl.handle.net/10138/21173 |
long_lat |
ENVELOPE(24.500,24.500,65.783,65.783) ENVELOPE(29.696,29.696,67.597,67.597) |
geographic |
Kemijoki Tuntsa |
geographic_facet |
Kemijoki Tuntsa |
genre |
Northern Finland Lapland |
genre_facet |
Northern Finland Lapland |
op_relation |
URN:ISBN:978-951-697-629-0 Helsinki: Finnish Meteorological Institute, 2007, Finnish Meteorological Institute Contributions . 0782-6117 http://hdl.handle.net/10138/21173 URN:ISBN:978-952-10-4187-7 |
op_rights |
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. |
_version_ |
1774721143061610496 |