DOI: 10.1175/JCLI-D-14-00672.1
Scopus记录号: 2-s2.0-85000885392
论文题名: Increased atmospheric CO2 growth rate during El Niño driven by reduced terrestrial productivity in the CMIP5 ESMs
作者: Kim J.-S. ; Kug J.-S. ; Yoon J.-H. ; Jeong S.-J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 24 起始页码: 8783
结束页码: 8805
语种: 英语
Scopus关键词: Atmospheric composition
; Atmospheric pressure
; Climatology
; Forestry
; Growth rate
; Nickel
; Systematic errors
; Biosphere-atmosphere interactions
; Carbon cycles
; Coupled Model Intercomparison Project
; ENSO
; Heterotrophic respiration
; Increased temperature
; Net primary production
; Temperature response
; Carbon dioxide
英文摘要: Better understanding of factors that control the global carbon cycle could increase confidence in climate projections. Previous studies found good correlation between the growth rate of atmospheric CO2 concentration and El Niño-Southern Oscillation (ENSO). The growth rate of atmospheric CO2 increases during El Niño but decreases during La Niña. In this study, long-term simulations of the Earth system models (ESMs) in phase 5 of the Coupled Model Intercomparison Project archive were used to examine the interannual carbon flux variability associated with ENSO. The ESMs simulate the relationship reasonably well with a delay of several months between ENSO and the changes in atmospheric CO2. The increase in atmospheric CO2 associated with El Niño is mostly caused by decreasing net primary production (NPP) in the ESMs. It is suggested that NPP anomalies over South Asia are at their maxima during boreal spring; therefore, the increase in CO2 concentration lags 4-5 months behind the peak phase of El Niño. The decrease in NPP during El Niño may be caused by decreased precipitation and increased temperature over tropical regions. Furthermore, systematic errors may exist in the ESM-simulated temperature responses to ENSO phases over tropical land areas, and these errors may lead to an overestimation of ENSO-related NPP anomalies. In contrast, carbon fluxes from heterotrophic respiration and natural fires are likely underestimated in the ESMs compared with offline model results and observational estimates, respectively. These uncertainties should be considered in long-term projections that include climate-carbon feedbacks. © 2016 American Meteorological Society. 资助项目: NRF, National Research Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50333
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, South Korea; Pacific Northwest National Laboratory, Richland, WA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, South Korea; School of Environmental Science and Engineering, South University of Science and Technology of China, Shenzhen, China
Recommended Citation:
Kim J.-S.,Kug J.-S.,Yoon J.-H.,et al. Increased atmospheric CO2 growth rate during El Niño driven by reduced terrestrial productivity in the CMIP5 ESMs[J]. Journal of Climate,2016-01-01,29(24)