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2018~2020年东北地区沿海城市臭氧污染趋势及空间分布特征研究 被引量:2
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作者 王琳琳 《绿色科技》 2021年第16期39-41,共3页
根据国家城市环境空气质量监测网2018~2020年监测结果,统计分析辽宁省14个城市77个监测点位的监测数据,重点分析大连市、丹东市、锦州市、盘锦市、营口市和葫芦岛市6个沿海城市。空间分布分析表明,臭氧污染空间上呈现西高东低的特征,201... 根据国家城市环境空气质量监测网2018~2020年监测结果,统计分析辽宁省14个城市77个监测点位的监测数据,重点分析大连市、丹东市、锦州市、盘锦市、营口市和葫芦岛市6个沿海城市。空间分布分析表明,臭氧污染空间上呈现西高东低的特征,2018~2020年全省臭氧污染逐年改善且高值区范围逐年缩小,沿海城市臭氧与全省平均水平基本持平;季节上臭氧污染春夏季高于秋冬季,空间上除冬季外均呈现西高东低的特征,沿海城市春夏低于全省平均水平,秋冬高于全省平均水平;2020年1、4、6、10月作为四季的典型月份,全省及沿海城市臭氧空间分布符合相应季节的分布特征。 展开更多
关键词 臭氧污染 空间分布 东北沿海地区
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Maternal genetic structure in ancient Shandong between 9500 and 1800 years ago 被引量:2
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作者 Juncen Liu Wen Zeng +21 位作者 Bo Sun Xiaowei Mao Yongsheng Zhao Fen Wang Zhenguang Li Fengshi Luan Junfeng Guo Chao Zhu Zimeng Wang Chengmin Wei Ming Zhang Peng Cao Feng Liu Qingyan Dai Xiaotian Feng Ruowei Yang Weihong Hou Wanjing Ping Xiaohong Wu E.Andrew Bennett Yichen Liu Qiaomei Fu 《Science Bulletin》 SCIE EI CSCD 2021年第11期1129-1135,M0004,共8页
Archaeological and ancient DNA studies revealed that Shandong,a multi-culture center in northern coastal China,was home to ancient populations having ancestry related to both northern and southern East Asian populatio... Archaeological and ancient DNA studies revealed that Shandong,a multi-culture center in northern coastal China,was home to ancient populations having ancestry related to both northern and southern East Asian populations.However,the limited temporal and geographical range of previous studies have been insufficient to describe the population history of this region in greater detail.Here,we report the analysis of 86 complete mitochondrial genomes from the remains of 9500 to 1800-year-old humans from12 archaeological sites across Shandong.For samples older than 4600 years before present(BP),we found haplogroups D4,D5,B4 c1,and B5 b2,which are observed in present-day northern and southern East Asians.For samples younger than 4600 BP,haplogroups C(C7 a1 and C7 b),M9(M9 a1),and F(F1 a1,F2 a,and F4 a1)begin to appear,indicating changes in the Shandong maternal genetic structure starting from the beginning of the Longshan cultural period.Within Shandong,the genetic exchange is possible between the coastal and inland regions after 3100 BP.We also discovered the B5 b2 lineage in Shandong populations,with the oldest Bianbian individual likely related to the ancestors of some East Asians and North Asians.By reconstructing a maternal genetic structure of Shandong populations,we provide greater resolution of the population dynamics of the northern coastal East Asia over the past nine thousand years. 展开更多
关键词 Ancient DNA Human Mitochondrial DNA East Asia NEOLITHIC
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