Detection and attribution of regional CO2 concentration anomalies using surface observations

Detection and attribution of regional CO2 concentration anomalies using surface observations
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利用地面观测来检测和归因区域二氧化碳浓度异常

DOI:
10.1016/j.atmosenv.2015.09.074
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发表时间:
2015-12
影响因子:
5
通讯作者:
Patrizio Emiliani
Patrizio Emiliani
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Lingxi Zhou;Xingang Liu;Frank Meinhardt;Patrizio Emiliani

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在这项研究中,我们分析了北半球8个站点1993-2012年间观测到的CO2浓度变化。计算了潜在震源贡献函数(PSCF)分析的五天回溯轨迹。应用了与事件发生相关的归一化权重因子,以得出更合理的CO2高程和封存。加权上升(▵CO2(W_E))和隔离(▵CO_2(W_S))CO2事件具有较大的空间差异,这是由于不同地区CO2排放/汇的强度和模式的差异所致。最显著的二氧化碳增加发生在亚洲站点:从1995年到2010年,瓦利关的▵二氧化碳(W_E)以年∼4%−1的速度增加了约56%;从1997年到2012年,与那根岛(Yon)的二氧化碳年∼增加了约39%(−3%)。根据PSCF的分析,这些增长在很大程度上归因于中国排放的快速增长。然而,▵二氧化碳(W_S)也增加了34.4%,1995年至2010年WLG的−年增长率为2.3%,1997年至2012年的∼年增长率为26.2%(年−1为1.7%)。蒙特西蒙和朔因斯兰的▵二氧化碳(W_E)和▵二氧化碳(W_S)均呈下降或相对持平的趋势,表明中欧的排放量和汇都有所减少。在国家气象局不同地点观测到的排放和汇的不同强度/趋势表明,估计未来的二氧化碳水平是一个复杂的问题。大气逆生态系统模型和基于过程的生态系统模型应在未来的碳通量估算中使用更多时间和空间分辨率较高的区域输入数据。
In this study, observed episodes of CO2concentrations at eight Northern Hemisphere (NH) sites from 1993 to 2012 were analyzed. Five-day back trajectories were calculated for a potential source contribution function (PSCF) analysis. A normalized weight factor related to the occurrence of the episodes was applied to derive more reasonable CO2elevations and sequestrations. Weighted elevated (▵CO2(W_E)) and sequestered (▵CO2(W_S)) CO2episodes had large spatial discrepancies due to the differentiation of strength and patterns of CO2emissions/sinks in different regions. The most significant enhancement in CO2episodes was observed at Asian sites: ▵CO2(W_E) increased by approximately 56% at an annual rate of ∼4% yr−1from 1995 to 2010 at Waliguan (WLG) and by approximately 39% (∼3% yr−1) from 1997 to 2012 at Yonagunijima (YON). According to the PSCF analysis, these increases are largely attributed to the rapid increase in emissions in China. However, ▵CO2(W_S) was also enhanced by 34.4% with a growth rate of 2.3% yr−1at WLG from 1995 to 2010 and ∼26.2% (1.7% yr−1) at YON from 1997 to 2012. Both ▵CO2(W_E) and ▵CO2(W_S) showed decreasing or relatively flat trends at Monte Cimone and Schauinsland, indicating reductions in emissions and sinks in central Europe. The different intensities/trends in emissions and sinks observed at different sites in the NH show that estimating future CO2levels is a complex problem. Atmospheric inverse and process-based ecosystem models should use more regional input data at high temporal and spatial resolutions for future carbon flux estimations.
DOI: 10.1016/j.atmosenv.2013.04.067
发表时间: 2013-10
影响因子: 5
作者:
Fang Zhang;Lingxi Zhou
通讯作者: Lingxi Zhou
DOI: 10.1111/j.1600-0889.2011.00534.x
发表时间: 2011-01
期刊: Tellus B: Chemical and Physical Meteorology
影响因子: --
作者:
K. Gurney;W. Eckels
通讯作者: K. Gurney;W. Eckels
DOI: --
发表时间: 1998
期刊: --
影响因子: --
作者:
R. Draxler
通讯作者: R. Draxler
DOI: 10.1029/2011jd016691
发表时间: 2011-12
影响因子: --
作者:
J. Turnbull;P. Tans;S. Lehman;D. Baker;T. Conway;Y. Chung;J. Gregg;John B. Miller;J. Southon-J.-S
通讯作者: J. Turnbull;P. Tans;S. Lehman;D. Baker;T. Conway;Y. Chung;J. Gregg;John B. Miller;J. Southon-J.-S
DOI: 10.1002/qj.49711850705
发表时间: 1992-07-01
影响因子: 8.9
作者:
WEBSTER, PJ;YANG, S
通讯作者: YANG, S