Abstract
There is significant spatial and temporal variability associated with greenhouse gas (GHG) fluxes in high-latitude Arctic tundra environments. The objectives of this study are to investigate temporal variability in CO2 and CH4 fluxes at Barrow, AK and to determine the factors causing this variability using a novel entropy-based classification scheme. In particular, we analyzed which geomorphic, soil, vegetation and climatic properties most explained the variability in GHG fluxes (opaque chamber measurements) during the growing season over three successive years. Results indicate that multi-year variability in CO2 fluxes was primarily associated with soil temperature variability as well as vegetation dynamics during the early and late growing season. Temporal variability in CH4 fluxes was primarily associated with changes in vegetation during the growing season and its interactions with primary controls like seasonal thaw. Polygonal ground features, which are common to Arctic regions, also demonstrated significant multi-year variability in GHG fluxes. Our results can be used to prioritize field sampling strategies, with an emphasis on measurements collected at locations and times that explain the most variability in GHG fluxes. For example, we found that sampling primary environmental controls at the centers of high centered polygons in the month of September (when freeze-back period begins) can provide significant constraints on GHG flux variability - a requirement for accurately predicting future changes to GHG fluxes. Overall, entropy results document the impact of changing environmental conditions (e.g., warming, growing season length) on GHG fluxes, thus providing clues concerning the manner in which ecosystem properties may be shifted regionally in a future climate.
Full Text
Topics from this Paper
Greenhouse Gas Fluxes
Variability In CH4 Fluxes
Variability In CO2 Fluxes
Primary Controls
CO2 Fluxes
+ Show 5 more
Create a personalized feed of these topics
Get StartedTalk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Similar Papers
Biogeochemistry
Jul 12, 2021
Global Change Biology
Oct 20, 2013
Science of The Total Environment
Feb 1, 2023
Global Change Biology
Jul 24, 2013
Science of The Total Environment
Oct 1, 2019
Forests
Jul 27, 2023
Biogeosciences
Jan 19, 2018
May 15, 2023
Atmospheric Environment
Feb 1, 2016
Ecological Applications
Jul 12, 2017
Plants
Oct 24, 2022
Plants
Oct 24, 2022
Environmental Science and Pollution Research
Apr 23, 2022
Environmental science and pollution research international
Apr 23, 2022
Climate
Aug 19, 2015
Science of The Total Environment
Science of The Total Environment
Dec 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023
Science of The Total Environment
Nov 1, 2023