Effect of thinning on surface fluxes in a boreal forest

Research output: Contribution to journalArticleScientificpeer-review

Abstract

[ 1] Thinning is a routine forest management operation that changes tree spacing, number, and size distribution and affects the material flows between vegetation and the atmosphere. Here, using direct micrometeorological ecosystem-scale measurements, we show that in a boreal pine forest, thinning decreases the deposition velocities of fine particles as expected but does not reduce the carbon sink, water vapor flux, or ozone deposition. The thinning decreased the all-sided leaf area index from 8 to 6, and we suggest that the redistribution of sources and sinks within the ecosystem compensated for this reduction in foliage area. In the case of water vapor and O-3, changes in light penetration and among-tree competition seem to increase individual transpiration rates and lead to larger stomatal apertures, thus enhancing also O-3 deposition. In the case of CO2, increased ground vegetation assimilation and decreased autotrophic respiration seem to cancel out opposite changes in canopy assimilation and heterotrophic respiration. Current soil-vegetation-atmosphere transfer models should be able to reproduce these observations.
Original languageEnglish
JournalGlobal Biogeochemical Cycles
Volume19
Pages (from-to)GB2001
Number of pages11
ISSN0886-6236
DOIs
Publication statusPublished - 2 Apr 2005
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 411 Agriculture and forestry

Cite this

@article{0d8f175fce84490087bb2ab363b23ced,
title = "Effect of thinning on surface fluxes in a boreal forest",
abstract = "[ 1] Thinning is a routine forest management operation that changes tree spacing, number, and size distribution and affects the material flows between vegetation and the atmosphere. Here, using direct micrometeorological ecosystem-scale measurements, we show that in a boreal pine forest, thinning decreases the deposition velocities of fine particles as expected but does not reduce the carbon sink, water vapor flux, or ozone deposition. The thinning decreased the all-sided leaf area index from 8 to 6, and we suggest that the redistribution of sources and sinks within the ecosystem compensated for this reduction in foliage area. In the case of water vapor and O-3, changes in light penetration and among-tree competition seem to increase individual transpiration rates and lead to larger stomatal apertures, thus enhancing also O-3 deposition. In the case of CO2, increased ground vegetation assimilation and decreased autotrophic respiration seem to cancel out opposite changes in canopy assimilation and heterotrophic respiration. Current soil-vegetation-atmosphere transfer models should be able to reproduce these observations.",
keywords = "411 Agriculture and forestry",
author = "Timo Vesala and Tanja Suni and {\"U}llar Rannik and Petri Keronen and Tiina Markkanen and Sanna Sevanto and Tiia Gr{\"o}nholm and Sampo Smolander and Markku Kulmala and H Ilvesniemi and R Ojansuu and Antti Uotila and Janne Levula and Annikki M{\"a}kel{\"a} and Jukka Pumpanen and Pasi Kolari and Liisa Kulmala and Nuria Altimir and F Berninger and Eero Nikinmaa and Pertti Hari",
year = "2005",
month = "4",
day = "2",
doi = "10.1029/2004GB002316",
language = "English",
volume = "19",
pages = "GB2001",
journal = "Global Biogeochemical Cycles",
issn = "0886-6236",
publisher = "Wiley/Blackwell",

}

Effect of thinning on surface fluxes in a boreal forest. / Vesala, Timo; Suni, Tanja; Rannik, Üllar; Keronen, Petri; Markkanen, Tiina; Sevanto, Sanna; Grönholm, Tiia; Smolander, Sampo; Kulmala, Markku; Ilvesniemi, H; Ojansuu, R; Uotila, Antti; Levula, Janne; Mäkelä, Annikki; Pumpanen, Jukka; Kolari, Pasi; Kulmala, Liisa; Altimir, Nuria; Berninger, F; Nikinmaa, Eero; Hari, Pertti.

In: Global Biogeochemical Cycles, Vol. 19, 02.04.2005, p. GB2001.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of thinning on surface fluxes in a boreal forest

AU - Vesala, Timo

AU - Suni, Tanja

AU - Rannik, Üllar

AU - Keronen, Petri

AU - Markkanen, Tiina

AU - Sevanto, Sanna

AU - Grönholm, Tiia

AU - Smolander, Sampo

AU - Kulmala, Markku

AU - Ilvesniemi, H

AU - Ojansuu, R

AU - Uotila, Antti

AU - Levula, Janne

AU - Mäkelä, Annikki

AU - Pumpanen, Jukka

AU - Kolari, Pasi

AU - Kulmala, Liisa

AU - Altimir, Nuria

AU - Berninger, F

AU - Nikinmaa, Eero

AU - Hari, Pertti

PY - 2005/4/2

Y1 - 2005/4/2

N2 - [ 1] Thinning is a routine forest management operation that changes tree spacing, number, and size distribution and affects the material flows between vegetation and the atmosphere. Here, using direct micrometeorological ecosystem-scale measurements, we show that in a boreal pine forest, thinning decreases the deposition velocities of fine particles as expected but does not reduce the carbon sink, water vapor flux, or ozone deposition. The thinning decreased the all-sided leaf area index from 8 to 6, and we suggest that the redistribution of sources and sinks within the ecosystem compensated for this reduction in foliage area. In the case of water vapor and O-3, changes in light penetration and among-tree competition seem to increase individual transpiration rates and lead to larger stomatal apertures, thus enhancing also O-3 deposition. In the case of CO2, increased ground vegetation assimilation and decreased autotrophic respiration seem to cancel out opposite changes in canopy assimilation and heterotrophic respiration. Current soil-vegetation-atmosphere transfer models should be able to reproduce these observations.

AB - [ 1] Thinning is a routine forest management operation that changes tree spacing, number, and size distribution and affects the material flows between vegetation and the atmosphere. Here, using direct micrometeorological ecosystem-scale measurements, we show that in a boreal pine forest, thinning decreases the deposition velocities of fine particles as expected but does not reduce the carbon sink, water vapor flux, or ozone deposition. The thinning decreased the all-sided leaf area index from 8 to 6, and we suggest that the redistribution of sources and sinks within the ecosystem compensated for this reduction in foliage area. In the case of water vapor and O-3, changes in light penetration and among-tree competition seem to increase individual transpiration rates and lead to larger stomatal apertures, thus enhancing also O-3 deposition. In the case of CO2, increased ground vegetation assimilation and decreased autotrophic respiration seem to cancel out opposite changes in canopy assimilation and heterotrophic respiration. Current soil-vegetation-atmosphere transfer models should be able to reproduce these observations.

KW - 411 Agriculture and forestry

U2 - 10.1029/2004GB002316

DO - 10.1029/2004GB002316

M3 - Article

VL - 19

SP - GB2001

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

SN - 0886-6236

ER -