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Title: Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission

Abstract

The few prethaw observations of tundra carbon fluxes suggest that there may be large spring releases, but little Is lmown about the scale and underlying mechanisms of this phenomenon. To address these questions, we combined ecosystem eddy flux measurements from two towers near Barrow, Alaska, with mechanistic soil-core thawing experiment During a 2week period prior to snowmelt In 2014, large fluxes were measured, reducing net summer uptake of CO2 by 46% and adding 6% to cumulative CH4 emissions. Emission pulses were linked to unique rain-on-snow events enhancing soli cracking. Controlled laboratory experiment revealed that as surface Ice thaws, an immediate, large pulse of trapped gases Is emitted. These results suggest that the Arctic C02 and CH4 spring pulse is a delayed release of biogenic gas production from the previous fall and that the pulse can be large enough to offset a significant fraction of the moderate Arctic tundra carbon sink.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]
  1. Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley California USA
  2. Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley California USA; Energy and Resources Group, University of California, Berkeley California USA
  3. Biological Systems Engineering Department, University of Nebraska-Lincoln, Lincoln Nebraska USA
  4. Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks Alaska USA
  5. Geophysical Institute, University of Alaska Fairbanks, Fairbanks Alaska USA
  6. Environmental Science Division, Argonne National Laboratory, Lemont Illinois USA
  7. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge Tennessee USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Biological and Environmental Research - Atmospheric Radiation Measurement (ARM) Program; Department of the Interior - U.S. Fish and Wildlife Service
OSTI Identifier:
1360152
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysical Research Letters; Journal Volume: 44; Journal Issue: 1
Country of Publication:
United States
Language:
English

Citation Formats

Raz-Yaseef, Naama, Torn, Margaret S., Wu, Yuxin, Billesbach, Dave P., Liljedahl, Anna K., Kneafsey, Timothy J., Romanovsky, Vladimir E., Cook, David R., and Wullschleger, Stan D.. Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission. United States: N. p., 2017. Web. doi:10.1002/2016GL071220.
Raz-Yaseef, Naama, Torn, Margaret S., Wu, Yuxin, Billesbach, Dave P., Liljedahl, Anna K., Kneafsey, Timothy J., Romanovsky, Vladimir E., Cook, David R., & Wullschleger, Stan D.. Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission. United States. doi:10.1002/2016GL071220.
Raz-Yaseef, Naama, Torn, Margaret S., Wu, Yuxin, Billesbach, Dave P., Liljedahl, Anna K., Kneafsey, Timothy J., Romanovsky, Vladimir E., Cook, David R., and Wullschleger, Stan D.. Tue . "Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission". United States. doi:10.1002/2016GL071220.
@article{osti_1360152,
title = {Large CO 2 and CH 4 emissions from polygonal tundra during spring thaw in northern Alaska: Spring Pulse Emission},
author = {Raz-Yaseef, Naama and Torn, Margaret S. and Wu, Yuxin and Billesbach, Dave P. and Liljedahl, Anna K. and Kneafsey, Timothy J. and Romanovsky, Vladimir E. and Cook, David R. and Wullschleger, Stan D.},
abstractNote = {The few prethaw observations of tundra carbon fluxes suggest that there may be large spring releases, but little Is lmown about the scale and underlying mechanisms of this phenomenon. To address these questions, we combined ecosystem eddy flux measurements from two towers near Barrow, Alaska, with mechanistic soil-core thawing experiment During a 2week period prior to snowmelt In 2014, large fluxes were measured, reducing net summer uptake of CO2 by 46% and adding 6% to cumulative CH4 emissions. Emission pulses were linked to unique rain-on-snow events enhancing soli cracking. Controlled laboratory experiment revealed that as surface Ice thaws, an immediate, large pulse of trapped gases Is emitted. These results suggest that the Arctic C02 and CH4 spring pulse is a delayed release of biogenic gas production from the previous fall and that the pulse can be large enough to offset a significant fraction of the moderate Arctic tundra carbon sink.},
doi = {10.1002/2016GL071220},
journal = {Geophysical Research Letters},
number = 1,
volume = 44,
place = {United States},
year = {Tue Jan 10 00:00:00 EST 2017},
month = {Tue Jan 10 00:00:00 EST 2017}
}