The G20 Hangzhou Summit has come to a conclusion.With the G20 state leaders as well as the leaders of seven major international agencies and eight guest states gathering together,having enthusiastic and effective in-d...The G20 Hangzhou Summit has come to a conclusion.With the G20 state leaders as well as the leaders of seven major international agencies and eight guest states gathering together,having enthusiastic and effective in-depth discussions and reaching extensive consensus,the one-and-half-day meeting has been a complete success.The Summit展开更多
The 2016 G20 Summit was successfully held in Hangzhou,China on Sept 4 and 5.This fruitful meeting has set the course for the world in such respects as economic growth,response to global challenges and global governanc...The 2016 G20 Summit was successfully held in Hangzhou,China on Sept 4 and 5.This fruitful meeting has set the course for the world in such respects as economic growth,response to global challenges and global governance system reform.The world economy again展开更多
In the golden September,leaders of the world’s 20 major economies all gathered in the city of Hangzhou,discussing how to transform the lackluster global economy into the'innovative,invigorated,interconnected and ...In the golden September,leaders of the world’s 20 major economies all gathered in the city of Hangzhou,discussing how to transform the lackluster global economy into the'innovative,invigorated,interconnected and inclusive'one,a vision proposed by the host country of China.This is the first time that China,the world’s second largest economy,took the presidency of the prime platform of global economic governance.The Business 20(B20)summit,which started on September 3展开更多
为了实现杭州G20峰会(二十国集团财长和央行行长会议)期间的环境空气质量目标,2016年初开始长江三角洲地区尤其是浙江省加快推进大气污染防治行动,分区分时间节点实施多种污染控制措施.为了评估这些措施实施成效,利用WRF-Chem(Weather R...为了实现杭州G20峰会(二十国集团财长和央行行长会议)期间的环境空气质量目标,2016年初开始长江三角洲地区尤其是浙江省加快推进大气污染防治行动,分区分时间节点实施多种污染控制措施.为了评估这些措施实施成效,利用WRF-Chem(Weather Research and Forecasting Model Coupled to Chemistry)模式对2015—2016年浙江省AQI(air quality index)、PM_(2.5)、SO_2等污染物浓度观测资料进行了模拟计算及分析.结果表明:(1)模拟计算显示,G20峰会期间各污控措施减排效果明显,核心区减排比例最大,严控区次之,管控区最小,4种污染物浓度减排比例从大到小顺序依次是SO_2、PM_(2.5)、NO_x和VOCs.(2)观测资料分析显示,G20峰会期间浙江省环境空气质量明显改善,但不同控制区改善状况不尽相同.与2015年9月、2016年8月相比,2016年9月核心区月均AQI的降幅约为35和25;严控区次之,AQI降幅约为20和15;管控区最弱,AQI降幅约为8和5.ρ(PM2.5)情况与AQI相似,观测结果与模拟计算一致.(3)G20峰会期间日均AQI及各种污染物浓度振荡下降,9月5日降至最低值.9月4—5日杭州市和浙江省日均AQI分别为90、62和77、51,均在GB 3095—2012《环境空气质量标准》的二级标准限值以下;日均ρ(PM_(2.5))分别为37、35μg/m^3和20、21μg/m^3,优于GB 3095—2012二级标准.(4)污控措施改变了大气中的首要污染物.以杭州市为例,2016年6—8月没有出现以PM_(2.5)为首要污染物的污染天气情况;7—9月没有出现以NO_2为首要污染物的污染天气情况,2015仅8月出现这种情况,10月出现跃升,日数占比高达60%左右;从4月开始以O_3为首要污染物的日数占比较往年呈更快的增长状态,7月出现最大值,并呈现与往年双峰型不同的单峰型结构.研究显示,除有利气象条件外,对污染源所采取的严格控制措施是杭州G20峰会取得良好效果的主要原因.展开更多
文摘The G20 Hangzhou Summit has come to a conclusion.With the G20 state leaders as well as the leaders of seven major international agencies and eight guest states gathering together,having enthusiastic and effective in-depth discussions and reaching extensive consensus,the one-and-half-day meeting has been a complete success.The Summit
文摘The 2016 G20 Summit was successfully held in Hangzhou,China on Sept 4 and 5.This fruitful meeting has set the course for the world in such respects as economic growth,response to global challenges and global governance system reform.The world economy again
文摘In the golden September,leaders of the world’s 20 major economies all gathered in the city of Hangzhou,discussing how to transform the lackluster global economy into the'innovative,invigorated,interconnected and inclusive'one,a vision proposed by the host country of China.This is the first time that China,the world’s second largest economy,took the presidency of the prime platform of global economic governance.The Business 20(B20)summit,which started on September 3
文摘为了实现杭州G20峰会(二十国集团财长和央行行长会议)期间的环境空气质量目标,2016年初开始长江三角洲地区尤其是浙江省加快推进大气污染防治行动,分区分时间节点实施多种污染控制措施.为了评估这些措施实施成效,利用WRF-Chem(Weather Research and Forecasting Model Coupled to Chemistry)模式对2015—2016年浙江省AQI(air quality index)、PM_(2.5)、SO_2等污染物浓度观测资料进行了模拟计算及分析.结果表明:(1)模拟计算显示,G20峰会期间各污控措施减排效果明显,核心区减排比例最大,严控区次之,管控区最小,4种污染物浓度减排比例从大到小顺序依次是SO_2、PM_(2.5)、NO_x和VOCs.(2)观测资料分析显示,G20峰会期间浙江省环境空气质量明显改善,但不同控制区改善状况不尽相同.与2015年9月、2016年8月相比,2016年9月核心区月均AQI的降幅约为35和25;严控区次之,AQI降幅约为20和15;管控区最弱,AQI降幅约为8和5.ρ(PM2.5)情况与AQI相似,观测结果与模拟计算一致.(3)G20峰会期间日均AQI及各种污染物浓度振荡下降,9月5日降至最低值.9月4—5日杭州市和浙江省日均AQI分别为90、62和77、51,均在GB 3095—2012《环境空气质量标准》的二级标准限值以下;日均ρ(PM_(2.5))分别为37、35μg/m^3和20、21μg/m^3,优于GB 3095—2012二级标准.(4)污控措施改变了大气中的首要污染物.以杭州市为例,2016年6—8月没有出现以PM_(2.5)为首要污染物的污染天气情况;7—9月没有出现以NO_2为首要污染物的污染天气情况,2015仅8月出现这种情况,10月出现跃升,日数占比高达60%左右;从4月开始以O_3为首要污染物的日数占比较往年呈更快的增长状态,7月出现最大值,并呈现与往年双峰型不同的单峰型结构.研究显示,除有利气象条件外,对污染源所采取的严格控制措施是杭州G20峰会取得良好效果的主要原因.
