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Title: Change in Arctic CO{sub 2} flux over two decades: Effects of climate change at Barrow, Alaska

Abstract

A significant difference in net ecosystem carbon balance of wet sedge ecosystems in the Barrow, Alaska region was observed between CO{sub 2} flux measurements obtained during the International Biological Program in 1971 and measurements made during the 1991-1992 growing seasons. Currently, high-center polygons are net sources of CO{sub 2} to the atmosphere of {approx}14 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}, while low-center polygons are losing {approx}3.6 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}, and ice wedge habitats are accumulating 4.0 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}. On average, moist meadow habitats characteristic of the IBP-II site are currently sources of {approx}1.3 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1} to the atmosphere compared to the reported accumulation of {approx}25 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1} determined in 1971. This difference in ecosystem function over the last two decades may be due to the recently reported increase in surface temperatures resulting in decreases in the soil moisture status. These results point to the importance of long-term research sites and databases for determining the potential effects of climate change on ecosystem function. 44 refs., 10 figs., 1 tab.

Authors:
; ;  [1]
  1. San Diego State Univ., CA (United States) [and others
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
96334
Resource Type:
Journal Article
Resource Relation:
Journal Name: Ecological Applications; Journal Volume: 5; Journal Issue: 3; Other Information: PBD: Aug 1995
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; CLIMATIC CHANGE; BIOLOGICAL EFFECTS; CARBON DIOXIDE; ECOLOGICAL CONCENTRATION; ARCTIC REGIONS; WETLANDS; CARBON CYCLE

Citation Formats

Oechel, W.C., Vourlitis, G.L., and Hastings, S.J. Change in Arctic CO{sub 2} flux over two decades: Effects of climate change at Barrow, Alaska. United States: N. p., 1995. Web. doi:10.2307/1941992.
Oechel, W.C., Vourlitis, G.L., & Hastings, S.J. Change in Arctic CO{sub 2} flux over two decades: Effects of climate change at Barrow, Alaska. United States. doi:10.2307/1941992.
Oechel, W.C., Vourlitis, G.L., and Hastings, S.J. Tue . "Change in Arctic CO{sub 2} flux over two decades: Effects of climate change at Barrow, Alaska". United States. doi:10.2307/1941992.
@article{osti_96334,
title = {Change in Arctic CO{sub 2} flux over two decades: Effects of climate change at Barrow, Alaska},
author = {Oechel, W.C. and Vourlitis, G.L. and Hastings, S.J.},
abstractNote = {A significant difference in net ecosystem carbon balance of wet sedge ecosystems in the Barrow, Alaska region was observed between CO{sub 2} flux measurements obtained during the International Biological Program in 1971 and measurements made during the 1991-1992 growing seasons. Currently, high-center polygons are net sources of CO{sub 2} to the atmosphere of {approx}14 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}, while low-center polygons are losing {approx}3.6 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}, and ice wedge habitats are accumulating 4.0 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1}. On average, moist meadow habitats characteristic of the IBP-II site are currently sources of {approx}1.3 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1} to the atmosphere compared to the reported accumulation of {approx}25 gC{center_dot}m{sup {minus}2}{center_dot}yr{sup {minus}1} determined in 1971. This difference in ecosystem function over the last two decades may be due to the recently reported increase in surface temperatures resulting in decreases in the soil moisture status. These results point to the importance of long-term research sites and databases for determining the potential effects of climate change on ecosystem function. 44 refs., 10 figs., 1 tab.},
doi = {10.2307/1941992},
journal = {Ecological Applications},
number = 3,
volume = 5,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 1995},
month = {Tue Aug 01 00:00:00 EDT 1995}
}