Spatial and temporal changes in SO2 regimes over China in the recent decade and the driving mechanism
Spatial and temporal changes in SO2 regimes over China in the recent decade and the driving mechanism
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近十年中国SO2格局时空变化及驱动机制
DOI：
10.5194/acp-18-18063-2018
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发表时间：
2018-12
影响因子：
6.3
通讯作者：
Van Roozendael Michel
中科院分区：
文献类型：
--
作者：
Wang Ting;Wang Pucai;Theys Nicolas;Tong Dan;Hendrick Francois;Zhang Qiang;Van Roozendael Michel
。2005-2016年中国地区二氧化硫时空变化及其相关特征
基于最先进的检索，研究了驱动机制
数据集。气候学二氧化硫表现出明显的季节性和
区域差异，冬季负荷较高，两个显著
马克西马中心位于中国平原北部和成渝地区。在
近十年来，二氧化硫的总体下降趋势已有报道。
全国范围内，根据一般规则，空间上不同的下降率
-SO2负荷越高，下降越明显。
然而，这种下降实际上不是单调的，而是四个截然不同的
时间域可以通过经验正交函数分析来识别。
在经历了最初的上升后，中国的二氧化硫经历了两次
2007-2008年和2014-2016年期间大幅下降，其中5年
温和反弹是持续的。尽管在空间上有连贯的行为，
北方的中国和南方的中国有着不同的机制。在北中国，
在排放的时间序列中检测到相同的四个区域，即
预计将以一定的百分比推动大气中SO2的状况
解释差异达81%。在总排放量中，来自
工业部门主导了整个二氧化硫的变化。
在此期间，家庭排放的作用仍不确定。相比之下，
对北方的中国来说，南方中国的二氧化硫排放呈现出连续的
下降趋势，由于工业和家庭的协调削减
排放。因此，排放所起的作用仅占约45%。
SO2的变化，主要是由于
2009年至2013年排放量和大气含量
继续下降，但大气含量出现反弹。不利的
气象条件，包括降水不足，风力较弱
速度和静态稳定性的提高，超过了降低
因此导致2009年二氧化硫的回升
到2013年。
. The spatial and temporal changes in SO2 regimes over China during 2005 to 2016 and their associated
driving mechanism are investigated based on a state-of-the-art retrieval
dataset. Climatological SO2 exhibits pronounced seasonal and
regional variations, with higher loadings in wintertime and two prominent
maxima centered in the North China Plain and the Cheng-Yu District. In the
last decade, overall SO2 decreasing trends have been reported
nationwide, with spatially varying downward rates according to a general rule
– the higher the SO2 loading, the more significant the decrease.
However, such decline is in fact not monotonic, but instead four distinct
temporal regimes can be identified by empirical orthogonal function analysis.
After an initial rise at the beginning, SO2 in China undergoes two
sharp drops in the periods 2007–2008 and 2014–2016, amid which 5-year
moderate rebounding is sustained. Despite spatially coherent behaviors,
different mechanisms are tied to North China and South China. In North China,
the same four regimes are detected in the time series of emission that is
expected to drive the regime of atmospheric SO2, with a percentage
of explained variance amounting to 81 %. Out of total emission, those from
the industrial sector dominate SO2 variation throughout the whole
period, while the role of household emission remains uncertain. In contrast
to North China, SO2 emissions in South China exhibit a continuous
descending tendency, due to the coordinated cuts of industrial and household
emissions. As a result, the role of emissions only makes up about 45 % of
the SO2 variation, primarily owing to the decoupled pathways of
emission and atmospheric content during 2009 to 2013 when the emissions
continue to decline but atmospheric content witnesses a rebound. Unfavorable
meteorological conditions, including deficient precipitation, weaker wind
speed and increased static stability, outweigh the effect of decreasing
emissions and thus give rise to the rebound of SO2 during 2009
to 2013.
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影响因子：
3.8
作者：
Yan Zhang;Can Li;N. Krotkov;J. Joiner;V. Fioletov;C. McLinden
通讯作者：
Yan Zhang;Can Li;N. Krotkov;J. Joiner;V. Fioletov;C. McLinden
影响因子：
--
作者：
M. Rix;P. Valks;N. Hao;D. Loyola;H. Schlager;H. Huntrieser;J. Flemming;U. Koehler;U. Schumann;A. Inness
通讯作者：
M. Rix;P. Valks;N. Hao;D. Loyola;H. Schlager;H. Huntrieser;J. Flemming;U. Koehler;U. Schumann;A. Inness
DOI：
--
发表时间：
2009
期刊：
Climatic and Environmental Research
影响因子：
--
作者：
Xiao-yan Meng
通讯作者：
Xiao-yan Meng
影响因子：
4.4
作者：
Theys, N.;De Smedt, I.;Van Roozendael, M.
通讯作者：
Van Roozendael, M.
DOI：
10.1007/978-981-10-5657-4_2
发表时间：
2017-01-01
期刊：
AMBIENT AIR POLLUTION AND HEALTH IMPACT IN CHINA
影响因子：
--
作者：
Ren, Lihong;Yang, Wen;Bai, Zhipeng
通讯作者：
Bai, Zhipeng