ERA

Download the full-sized PDF of Carbon and energy exchange by a black spruce – moss ecosystem under changing climate: testing the mathematical model ecosys with data from the BOREAS experimentDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R32V2C99S

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Renewable Resources, Department of

Collections

This file is in the following collections:

Journal Articles (Renewable Resources)

Carbon and energy exchange by a black spruce – moss ecosystem under changing climate: testing the mathematical model ecosys with data from the BOREAS experiment Open Access

Descriptions

Author or creator
Grant, R.F.
Goulden, M.L.
Wofsy, S.C.
Berry, J.A.
Additional contributors
Subject/Keyword
Water-vapor
Net primary production
Phosphorus uptake
Soil compaction
Nitrous-oxide
Forest ecosystems
Enrichment face experiment
CO2 enrichment
Root-growth
Simulation-model
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
There is some uncertainty whether net ecosystem productivity (NEP) of boreal black spruce forests is positive or negative under current climates and how NEP would change under hypothesized changes in future climates. The mathematical model ecosys was used to examine NEP of a boreal black spruce forest by testing rates of C transfer simulated from an integrated set of scientific hypotheses against rates measured with chamber, micrometeorological, isotopic and allometric techniques at the northern old black spruce site of the Boreal Ecosystem-Atmosphere Study (BOREAS). Daily aggregations of modeled and measured hourly C fluxes indicated that NEP rose with solar radiation if air temperatures remained below 15degreesC, but declined if air temperatures rose above 20degreesC. Daily NEP was thus largest under the higher radiation and lower temperatures of June, but declined under the lower radiation and higher temperatures of July and August. Yearly aggregations of modeled hourly C fluxes indicated that under current (1994-1996) climate NEP of the 150 year old northern old black spruce site was about 40 (wood) + 15 (soil) = 55 g C m(-2) yr(-1). Moss was estimated to contribute about 0.25 of net primary productivity (NPP) at this site and was thus an important component of ecosystem C exchange. The model was then used to predict changes in NEP at the old northern old black spruce site under the IS92a climate change scenario. After 150 years NEP was predicted to be 120 (wood) minus 10 (soil) = I 10 g C m(-2) yr(-1). Cumulative gains of C under this scenario were predicted to be 5700 (wood) minus 700 (soil) = 5000 g C m(-2) after 150 years. Gains of wood C would be vulnerable to loss by fire and insects, both of which could also increase under warmer climates.
Date created
2001
DOI
doi:10.7939/R32V2C99S
License information
Rights
© 2001 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Grant, R.F., Goulden, M.L., Wofsy, S.C. and Berry, J.A. (2001). Carbon and energy exchange by a black spruce – moss ecosystem under changing climate: testing the mathematical model ecosys with data from the BOREAS experiment. Journal of Geophysical Research, 106, 33605-33621. doi:10.1029/2001JD900064.
Source
Link to related item

File Details

Date Uploaded
Date Modified
2014-04-30T23:28:21.833+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 1880574
Last modified: 2015:10:12 17:55:36-06:00
Filename: JGR_106_2001_33605.pdf
Original checksum: f2e59ced0365e4c79350023555a2fe3f
Well formed: true
Valid: true
File title: Carbon and energy exchange by a black sprucemoss ecosystem under changing climate Testing the mathematical model ecosys with data from the BOREAS experiment
File author: R. F. Grant, M. L. Goulden, S. C. Wofsy, J. A. Berry
Page count: 17
Activity of users you follow
User Activity Date