Contemporary carbon accumulation in a boreal oligotrophic minerogenic mire - a significant sink after accounting for all C-fluxes
Nilsson, Mats ; Sagerfors, Joergen ; Buffam, Ishi ; Laudon, Hjalmar ; Eriksson, Tobias ; Grelle, Achim ; Klemedtsson, Leif ; Weslien, Per and Lindroth, Anders LU
(2008)
In Global Change Biology
14(10).
p.2317-2332
- Abstract
- Based on theories of mire development and responses to a changing climate, the current role of mires as a net carbon sink has been questioned. A rigorous evaluation of the current net C-exchange in mires requires measurements of all relevant fluxes. Estimates of annual total carbon budgets in mires are still very limited. Here, we present a full carbon budget over 2 years for a boreal minerogenic oligotrophic mire in northern Sweden (64 degrees 11'N, 19 degrees 33'E). Data on the following fluxes were collected: land-atmosphere CO2 exchange (continuous Eddy covariance measurements) and CH4 exchange (static chambers during the snow free period); TOC (total organic carbon) in precipitation; loss of TOC, dissolved inorganic carbon (DIC) and... (More)
- Based on theories of mire development and responses to a changing climate, the current role of mires as a net carbon sink has been questioned. A rigorous evaluation of the current net C-exchange in mires requires measurements of all relevant fluxes. Estimates of annual total carbon budgets in mires are still very limited. Here, we present a full carbon budget over 2 years for a boreal minerogenic oligotrophic mire in northern Sweden (64 degrees 11'N, 19 degrees 33'E). Data on the following fluxes were collected: land-atmosphere CO2 exchange (continuous Eddy covariance measurements) and CH4 exchange (static chambers during the snow free period); TOC (total organic carbon) in precipitation; loss of TOC, dissolved inorganic carbon (DIC) and CH4 through stream water runoff (continuous discharge measurements and regular C-concentration measurements). The mire constituted a net sink of 27 +/- 3.4 (+/- SD) g C m(-2) yr(-1) during 2004 and 20 +/- 3.4 g C m(-2) yr(-1) during 2005. This could be partitioned into an annual surface-atmosphere CO2 net uptake of 55 +/- 1.9 g C m(-2) yr(-1) during 2004 and 48 +/- 1.6 g C m(-2) yr(-1) during 2005. The annual NEE was further separated into a net uptake season, with an uptake of 92 g C m(-2) yr(-1) during 2004 and 86 g C m(-2) yr(-1) during 2005, and a net loss season with a loss of 37 g C m(-2) yr(-1) during 2004 and 38 g C m(-2) yr(-1) during 2005. Of the annual net CO2-C uptake, 37% and 31% was lost through runoff (with runoff TOC > DIC >> CH4) and 16% and 29% through methane emission during 2004 and 2005, respectively. This mire is still a significant C-sink, with carbon accumulation rates comparable to the long-term Holocene C-accumulation, and higher than the C-accumulation during the late Holocene in the region. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1287296
- author
- Nilsson, Mats
; Sagerfors, Joergen
; Buffam, Ishi
; Laudon, Hjalmar
; Eriksson, Tobias
; Grelle, Achim
; Klemedtsson, Leif
; Weslien, Per
and Lindroth, Anders
LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- peat, NEE, NECB, methane, Eddy covariance, DOC, boreal mire, carbon balance, runoff, Sphagnum, TOC
- in
- Global Change Biology
- volume
- 14
- issue
- 10
- pages
- 2317 - 2332
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000259360500008
- scopus:52449129867
- ISSN
- 1354-1013
- DOI
- 10.1111/j.1365-2486.2008.01654.x
- language
- English
- LU publication?
- yes
- id
- 7c34605c-392f-4706-b41d-832e299020ab (old id 1287296)
- date added to LUP
- 2016-04-01 11:52:07
- date last changed
- 2024-07-03 03:29:09
@article{7c34605c-392f-4706-b41d-832e299020ab,
abstract = {{Based on theories of mire development and responses to a changing climate, the current role of mires as a net carbon sink has been questioned. A rigorous evaluation of the current net C-exchange in mires requires measurements of all relevant fluxes. Estimates of annual total carbon budgets in mires are still very limited. Here, we present a full carbon budget over 2 years for a boreal minerogenic oligotrophic mire in northern Sweden (64 degrees 11'N, 19 degrees 33'E). Data on the following fluxes were collected: land-atmosphere CO2 exchange (continuous Eddy covariance measurements) and CH4 exchange (static chambers during the snow free period); TOC (total organic carbon) in precipitation; loss of TOC, dissolved inorganic carbon (DIC) and CH4 through stream water runoff (continuous discharge measurements and regular C-concentration measurements). The mire constituted a net sink of 27 +/- 3.4 (+/- SD) g C m(-2) yr(-1) during 2004 and 20 +/- 3.4 g C m(-2) yr(-1) during 2005. This could be partitioned into an annual surface-atmosphere CO2 net uptake of 55 +/- 1.9 g C m(-2) yr(-1) during 2004 and 48 +/- 1.6 g C m(-2) yr(-1) during 2005. The annual NEE was further separated into a net uptake season, with an uptake of 92 g C m(-2) yr(-1) during 2004 and 86 g C m(-2) yr(-1) during 2005, and a net loss season with a loss of 37 g C m(-2) yr(-1) during 2004 and 38 g C m(-2) yr(-1) during 2005. Of the annual net CO2-C uptake, 37% and 31% was lost through runoff (with runoff TOC > DIC >> CH4) and 16% and 29% through methane emission during 2004 and 2005, respectively. This mire is still a significant C-sink, with carbon accumulation rates comparable to the long-term Holocene C-accumulation, and higher than the C-accumulation during the late Holocene in the region.}},
author = {{Nilsson, Mats and Sagerfors, Joergen and Buffam, Ishi and Laudon, Hjalmar and Eriksson, Tobias and Grelle, Achim and Klemedtsson, Leif and Weslien, Per and Lindroth, Anders}},
issn = {{1354-1013}},
keywords = {{peat; NEE; NECB; methane; Eddy covariance; DOC; boreal mire; carbon balance; runoff; Sphagnum; TOC}},
language = {{eng}},
number = {{10}},
pages = {{2317--2332}},
publisher = {{Wiley-Blackwell}},
series = {{Global Change Biology}},
title = {{Contemporary carbon accumulation in a boreal oligotrophic minerogenic mire - a significant sink after accounting for all C-fluxes}},
url = {{http://dx.doi.org/10.1111/j.1365-2486.2008.01654.x}},
doi = {{10.1111/j.1365-2486.2008.01654.x}},
volume = {{14}},
year = {{2008}},
}