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Biophysical controls on CO2 fluxes of three Northern forets based on long-term eddy covariance data.

Lagergren, Fredrik LU ; Lindroth, Anders LU ; Dellwik, E; Ibrom, A; Lankreijer, Harry LU ; Launiainen, S; Mölder, Meelis LU ; Kolari, P; Pilegaard, K and Vesala, T (2008) In Tellus. Series B: Chemical and Physical Meteorology 60(2). p.143-152
Abstract (Swedish)
Abstract in Undetermined

Six to nine years of net ecosystem carbon exchange (NEE) data from forests in Hyytiala in Finland, Soro in Denmark and Norunda in Sweden were used to evaluate the interannual variation in the carbon balance. For half-monthly periods, average NEE was calculated for the night-time data. For the daytime data parameters were extracted for the relationship to photosynthetic active radiation (PAR). The standard deviation of the parameters was highest for Norunda where it typically was around 25% of the mean, while it was ca. 15% for Hyytiala and Soro. Temperature was the main controller of respiration and photosynthetic capacity in autumn, winter and spring but explained very little of the interannual... (More)
Abstract in Undetermined

Six to nine years of net ecosystem carbon exchange (NEE) data from forests in Hyytiala in Finland, Soro in Denmark and Norunda in Sweden were used to evaluate the interannual variation in the carbon balance. For half-monthly periods, average NEE was calculated for the night-time data. For the daytime data parameters were extracted for the relationship to photosynthetic active radiation (PAR). The standard deviation of the parameters was highest for Norunda where it typically was around 25% of the mean, while it was ca. 15% for Hyytiala and Soro. Temperature was the main controller of respiration and photosynthetic capacity in autumn, winter and spring but explained very little of the interannual variation in summer. A strong correlation between respiration and photosynthesis was also revealed. The start, end and length of the growing season were estimated by four different criteria. The start date could explain some of the variation in yearly total NEE and gross primary productivity (GPP) in Hyytiala and Soro, but the average maximum photosynthetic capacity in summer explained more of the variation in annual GPP for all sites than start, end or length of the growing season. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Tellus. Series B: Chemical and Physical Meteorology
volume
60
issue
2
pages
143 - 152
publisher
Taylor & Francis
external identifiers
  • wos:000254277200002
  • scopus:41549157456
ISSN
0280-6509
DOI
10.1111/j.1600-0889.2006.00324.x
language
English
LU publication?
yes
id
0cf18e47-fef5-43ef-9b84-bc4bc20da430 (old id 639286)
date added to LUP
2007-12-14 13:27:13
date last changed
2017-08-13 03:35:47
@article{0cf18e47-fef5-43ef-9b84-bc4bc20da430,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
Six to nine years of net ecosystem carbon exchange (NEE) data from forests in Hyytiala in Finland, Soro in Denmark and Norunda in Sweden were used to evaluate the interannual variation in the carbon balance. For half-monthly periods, average NEE was calculated for the night-time data. For the daytime data parameters were extracted for the relationship to photosynthetic active radiation (PAR). The standard deviation of the parameters was highest for Norunda where it typically was around 25% of the mean, while it was ca. 15% for Hyytiala and Soro. Temperature was the main controller of respiration and photosynthetic capacity in autumn, winter and spring but explained very little of the interannual variation in summer. A strong correlation between respiration and photosynthesis was also revealed. The start, end and length of the growing season were estimated by four different criteria. The start date could explain some of the variation in yearly total NEE and gross primary productivity (GPP) in Hyytiala and Soro, but the average maximum photosynthetic capacity in summer explained more of the variation in annual GPP for all sites than start, end or length of the growing season.},
  author       = {Lagergren, Fredrik and Lindroth, Anders and Dellwik, E and Ibrom, A and Lankreijer, Harry and Launiainen, S and Mölder, Meelis and Kolari, P and Pilegaard, K and Vesala, T},
  issn         = {0280-6509},
  language     = {eng},
  number       = {2},
  pages        = {143--152},
  publisher    = {Taylor & Francis},
  series       = {Tellus. Series B: Chemical and Physical Meteorology},
  title        = {Biophysical controls on CO2 fluxes of three Northern forets based on long-term eddy covariance data.},
  url          = {http://dx.doi.org/10.1111/j.1600-0889.2006.00324.x},
  volume       = {60},
  year         = {2008},
}