Advanced

Surface energy exchange in pristine and managed boreal peatlands

Alekseychik, Pavel; Mammarella, I.; Lindroth, A. LU ; Lohila, A.; Aurela, M.; Laurila, T.; Kasurinen, V.; Lund, M. LU ; Rinne, J. LU and Nilsson, M. B., et al. (2018) In Mires and Peat 21.
Abstract

Surface–atmosphere energy exchange is strongly ecosystem-specific. At the same time, as the energy balance constitutes responses of an ecosystem to environmental stressors including precipitation, humidity and solar radiation, it results in feedbacks of potential importance for the regional climate. Northern peatlands represent a diverse class of ecosystems that cover nearly 6 × 106 km2 in the Boreal region, which makes the inter-comparison of their energy balances an important objective. With this in mind we studied energy exchange across a broad spectrum of peatlands from pristine fens and bogs to forested and agriculturally managed peatlands, which represent a large fraction of the landscape in Finland and... (More)

Surface–atmosphere energy exchange is strongly ecosystem-specific. At the same time, as the energy balance constitutes responses of an ecosystem to environmental stressors including precipitation, humidity and solar radiation, it results in feedbacks of potential importance for the regional climate. Northern peatlands represent a diverse class of ecosystems that cover nearly 6 × 106 km2 in the Boreal region, which makes the inter-comparison of their energy balances an important objective. With this in mind we studied energy exchange across a broad spectrum of peatlands from pristine fens and bogs to forested and agriculturally managed peatlands, which represent a large fraction of the landscape in Finland and Sweden. The effects of management activities on the energy balance were extensively examined from the micrometeorological point of view, using eddy covariance data from eight sites in these two countries (56º 12'–62º 11' N, 13º 03'–30º 05' E). It appears that the surface energy balance varies widely amongst the different peatland types. Generally, energy exchange features including the Bowen ratio, surface conductance, coupling to the atmosphere, responses to water table fluctuations and vapour pressure deficit could be associated directly with the peatland type. The relative constancy of the Bowen ratio in natural open mires contrasted with its variation in tree-covered and agricultural peatlands. We conclude that the impacts of management and the consequences of land-use change in peatlands for the local and regional climate might be substantial.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bowen ratio, Land use, Peatland management, Surface energy balance
in
Mires and Peat
volume
21
publisher
Int Peat Soc
external identifiers
  • scopus:85053268383
ISSN
1819-754X
DOI
10.19189/MaP.2018.OMB.333
language
English
LU publication?
yes
id
c761ef18-ed38-417d-b946-6847d9356c81
date added to LUP
2018-11-13 13:51:33
date last changed
2019-02-20 11:35:32
@article{c761ef18-ed38-417d-b946-6847d9356c81,
  abstract     = {<p>Surface–atmosphere energy exchange is strongly ecosystem-specific. At the same time, as the energy balance constitutes responses of an ecosystem to environmental stressors including precipitation, humidity and solar radiation, it results in feedbacks of potential importance for the regional climate. Northern peatlands represent a diverse class of ecosystems that cover nearly 6 × 10<sup>6</sup> km<sup>2</sup> in the Boreal region, which makes the inter-comparison of their energy balances an important objective. With this in mind we studied energy exchange across a broad spectrum of peatlands from pristine fens and bogs to forested and agriculturally managed peatlands, which represent a large fraction of the landscape in Finland and Sweden. The effects of management activities on the energy balance were extensively examined from the micrometeorological point of view, using eddy covariance data from eight sites in these two countries (56º 12'–62º 11' N, 13º 03'–30º 05' E). It appears that the surface energy balance varies widely amongst the different peatland types. Generally, energy exchange features including the Bowen ratio, surface conductance, coupling to the atmosphere, responses to water table fluctuations and vapour pressure deficit could be associated directly with the peatland type. The relative constancy of the Bowen ratio in natural open mires contrasted with its variation in tree-covered and agricultural peatlands. We conclude that the impacts of management and the consequences of land-use change in peatlands for the local and regional climate might be substantial.</p>},
  articleno    = {14},
  author       = {Alekseychik, Pavel and Mammarella, I. and Lindroth, A. and Lohila, A. and Aurela, M. and Laurila, T. and Kasurinen, V. and Lund, M. and Rinne, J. and Nilsson, M. B. and Peichl, M. and Minkkinen, K. and Shurpali, N. J. and Tuittila, E. S. and Martikainen, P. J. and Tuovinen, J. P. and Vesala, T.},
  issn         = {1819-754X},
  keyword      = {Bowen ratio,Land use,Peatland management,Surface energy balance},
  language     = {eng},
  publisher    = {Int Peat Soc},
  series       = {Mires and Peat},
  title        = {Surface energy exchange in pristine and managed boreal peatlands},
  url          = {http://dx.doi.org/10.19189/MaP.2018.OMB.333},
  volume       = {21},
  year         = {2018},
}