DOI: 10.1002/2015GB005125
Scopus记录号: 2-s2.0-84941737607
论文题名: Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas-northern Mexico region
作者: Parazoo N ; C ; , Barnes E ; , Worden J ; , Harper A ; B ; , Bowman K ; B ; , Frankenberg C ; , Wolf S ; , Litvak M ; , Keenan T ; F
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 8 起始页码: 1247
结束页码: 1265
语种: 英语
英文关键词: carbon cycle
; climate variability
; hydrological cycle
; land surface modeling
; land/atmosphere interactions
; remote sensing
Scopus关键词: atmosphere-biosphere interaction
; atmospheric forcing
; carbon flux
; climate change
; drought
; El Nino-Southern Oscillation
; extreme event
; future prospect
; heat flow
; hydrological cycle
; La Nina
; land surface
; North Atlantic Oscillation
; primary production
; remote sensing
; soil moisture
; Mexico [North America]
; Texas
; United Kingdom
; United States
英文摘要: Climate extremes such as drought and heat waves can cause substantial reductions in terrestrial carbon uptake. Advancing projections of the carbon uptake response to future climate extremes depends on (1) identifying mechanistic links between the carbon cycle and atmospheric drivers, (2) detecting and attributing uptake changes, and (3) evaluating models of land response and atmospheric forcing. Here, we combine model simulations, remote sensing products, and ground observations to investigate the impact of climate variability on carbon uptake in the Texas-northern Mexico region. Specifically, we (1) examine the relationship between drought, carbon uptake, and variability of El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) using the Joint UK Land-Environment Simulator (JULES) biosphere simulations from 1950-2012, (2) quantify changes in carbon uptake during record drought conditions in 2011, and (3) evaluate JULES carbon uptake and soil moisture in 2011 using observations from remote sensing and a network of flux towers in the region. Long-term simulations reveal systematic decreases in regional-scale carbon uptake during negative phases of ENSO and NAO, including amplified reductions of gross primary production (GPP) (-0.42 ± 0.18 Pg C yr-1) and net ecosystem production (NEP) (-0.14 ± 0.11 Pg C yr-1) during strong La Niña years. The 2011 megadrought caused some of the largest declines of GPP (-0.50 Pg C yr-1) and NEP (-0.23 Pg C yr-1) in our simulations. In 2011, consistent declines were found in observations, including high correlation of GPP and surface soil moisture (r = 0.82 ± 0.23, p = 0.012) in remote sensing-based products. These results suggest a large-scale response of carbon uptake to ENSO and NAO, and highlight a need to improve model predictions of ENSO and NAO in order to improve predictions of future impacts on the carbon cycle and the associated feedbacks to climate change. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77949
Appears in Collections: 气候变化事实与影响
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Mathematics and Physical Science, University of Exeter, Exeter, United Kingdom; Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, United States; Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland; Department of Biology, University of New Mexico, Albuquerque, NM, United States; Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia
Recommended Citation:
Parazoo N,C,, Barnes E,et al. Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas-northern Mexico region[J]. Global Biogeochemical Cycles,2015-01-01,29(8)