This study is primarily focused on Cleveland-Akron-Lorain nonattainment area in northeastern Ohio. The base year 2002 considered in this study witnessed one of the worst cases of ozone pollution in this region with oz...This study is primarily focused on Cleveland-Akron-Lorain nonattainment area in northeastern Ohio. The base year 2002 considered in this study witnessed one of the worst cases of ozone pollution in this region with ozone values exceeding previous 8-hour ozone standards of 84 ppb. The photochemical modeling system CAMx was applied to compute relative reduction factors, which were used subsequently to scale the base year (2002) values at the ozone monitoring sites to estimate the ozone design values for the year 2009 in Cleveland area for different emissions reduction scenarios. The results disclose that the largest change in the 2009 ozone design values consequent to applying auxiliary emission control strategies is between 1 and 1.5 ppb, which still left certain counties in northeastern Ohio unable to demonstrate attainment. The results are important in the development of emission control strategies in today’s context with instillation of even more stringent ozone standards and potential future increases in ozone concentrations due to climate change.展开更多
Proterozoic rocks in the northeastern Jiangxi-southern Anhui may fall into three rock associations whichbelong to different but interrelated tectono-palaeogeographic units. The field geological and petrochemicalcharac...Proterozoic rocks in the northeastern Jiangxi-southern Anhui may fall into three rock associations whichbelong to different but interrelated tectono-palaeogeographic units. The field geological and petrochemicalcharacteristics of the northeastern Jiangxi-western Zhejiang volcanic zone indicate that it was once an islandarc zone. An analysis of the sedimentary characteristics of Proterozoic turbidites lying north of the zone has re-vealed the history of development of a back-arc basin. According to the type of the Proterozoic rock formationsouth of the zone, it may be deduced that the formation might represent the fore-arc and trench areas. Bymeans of various tectono-palaeogeographic analyses, the relation between the island arc zone and the back-arcbasin is inferred and the Late Proterozoic tectono-palaeogeographic development is discussed by using themodel of the trench-arc-basin system.展开更多
对采自东北各地的310份柄锈菌标本进行鉴定的结果有柄锈菌69种和变种,寄生在17科的59个寄主植物属上,其中新变种1个:鸢尾柄锈菌多孔变种(Puccinia iridis Wallr. var. polyporis var. nov.),国内新记录种1个:短果茴芹柄锈菌(Puccinia pi...对采自东北各地的310份柄锈菌标本进行鉴定的结果有柄锈菌69种和变种,寄生在17科的59个寄主植物属上,其中新变种1个:鸢尾柄锈菌多孔变种(Puccinia iridis Wallr. var. polyporis var. nov.),国内新记录种1个:短果茴芹柄锈菌(Puccinia pimpinellae-brachycarpae Tranzsch. et Eremeeva),新记录变种1个:两栖蓼柄锈菌卷茎蓼变种(Puccinia polygoni-amphilii Pers. var. convolvdi(A.&S.)Arth.),东北地区首次报告的种8个:以扫描电镜观察研究了某些种的夏孢子和冬孢子表面构造;针对研究中涉及的观察方法、种的概念及划分标准等问题进行了讨论.展开更多
文摘This study is primarily focused on Cleveland-Akron-Lorain nonattainment area in northeastern Ohio. The base year 2002 considered in this study witnessed one of the worst cases of ozone pollution in this region with ozone values exceeding previous 8-hour ozone standards of 84 ppb. The photochemical modeling system CAMx was applied to compute relative reduction factors, which were used subsequently to scale the base year (2002) values at the ozone monitoring sites to estimate the ozone design values for the year 2009 in Cleveland area for different emissions reduction scenarios. The results disclose that the largest change in the 2009 ozone design values consequent to applying auxiliary emission control strategies is between 1 and 1.5 ppb, which still left certain counties in northeastern Ohio unable to demonstrate attainment. The results are important in the development of emission control strategies in today’s context with instillation of even more stringent ozone standards and potential future increases in ozone concentrations due to climate change.
文摘Proterozoic rocks in the northeastern Jiangxi-southern Anhui may fall into three rock associations whichbelong to different but interrelated tectono-palaeogeographic units. The field geological and petrochemicalcharacteristics of the northeastern Jiangxi-western Zhejiang volcanic zone indicate that it was once an islandarc zone. An analysis of the sedimentary characteristics of Proterozoic turbidites lying north of the zone has re-vealed the history of development of a back-arc basin. According to the type of the Proterozoic rock formationsouth of the zone, it may be deduced that the formation might represent the fore-arc and trench areas. Bymeans of various tectono-palaeogeographic analyses, the relation between the island arc zone and the back-arcbasin is inferred and the Late Proterozoic tectono-palaeogeographic development is discussed by using themodel of the trench-arc-basin system.
文摘对采自东北各地的310份柄锈菌标本进行鉴定的结果有柄锈菌69种和变种,寄生在17科的59个寄主植物属上,其中新变种1个:鸢尾柄锈菌多孔变种(Puccinia iridis Wallr. var. polyporis var. nov.),国内新记录种1个:短果茴芹柄锈菌(Puccinia pimpinellae-brachycarpae Tranzsch. et Eremeeva),新记录变种1个:两栖蓼柄锈菌卷茎蓼变种(Puccinia polygoni-amphilii Pers. var. convolvdi(A.&S.)Arth.),东北地区首次报告的种8个:以扫描电镜观察研究了某些种的夏孢子和冬孢子表面构造;针对研究中涉及的观察方法、种的概念及划分标准等问题进行了讨论.
