搜索结果: 1-15 共查到“CMAQ”相关记录20条 . 查询时间(0.156 秒)
采用CMAQ模式和自适应偏最小二乘回归法相结合的动力-统计预报方法，对2014年1-12月全国252个环境监测站的PM2.5浓度逐时预报值进行了滚动订正，分析了订正前后PM2.5浓度的时空变化特征，重点研究该方法在中国不同地区不同季节的适用性.结果表明：CMAQ模式预报的PM2.5浓度年平均和秋冬季季节平均偏差表现为非均匀空间分布特征，即辽宁、山东部分地区、川渝地区及华中、华东、华南大部分地区预报...
以2006年中国地区的INTEX-B排放清单为基础,采用CMAQ模式污染源同化方法,反演更新了2013年1月重霾污染过程华北地区的SO2和NOx排放源;应用WRF-CMAQ模式以及2006年INTEX-B初始排放源和2013年1月改进的排放源,分别模拟了1月9-15日和28-31日两次持续重霾污染过程的SO2和NO2浓度,并与华北地区47个环境监测站点实测值进行对比,重点分析了基于初始源和同化反演...
基于CMAQ模型的大连市大气氮湿沉降模拟研究
CMAQ模型 离子浓度 大连市
2014/12/29
为了探讨大连市大气氮氧化物湿沉降的污染特征,通过监测站采集2012年内大连市的雨水样品,分析了氮氧化物的沉降浓度及沉降规律.同时,采用CMAQ模型MM5气象模式对大连市大气氮湿沉降进行了模拟研究,并在相关模拟模型的预报因子中增加氮氧化物污染源动态变化信息进行修正.结果表明:大连市大气氮湿沉降中硝酸根离子的平均当量浓度值为71.73 μeq · L-1,铵根离子为98.91 μeq · L-1;大连...
Air quality forecast of PM10 in Beijing with Community Multi-scale Air Quality Modeling (CMAQ) system: emission and improvement
Air quality forecast Community Multi-scale Air Quality Modeling
2014/12/19
Evaluation of dust and trace metal estimates from the Community Multiscale Air Quality (CMAQ) model version 5.0
Evaluation of dust trace metal estimates
2014/12/12
The Community Multiscale Air Quality (CMAQ)
model is a state-of-the-science air quality model that simulates the emission, transformation, transport, and fate of the
many different air pollutant spe...
WRF-CMAQ two-way coupled system with aerosol feedback: software development and preliminary results
WRF-CMAQ two-way coupled system aerosol feedback software development preliminary results
2014/12/11
Air quality models such as the EPA Community Multiscale Air Quality (CMAQ) require meteorological data as part of the input to drive the chemistry and transport simulation. The Meteorology-Chemistry I...
A multi-resolution assessment of the Community Multiscale Air Quality (CMAQ) model v4.7 wet deposition estimates for 2002–2006
Air quality CMAQ model Performance Sulfuric acid wet deposition Ammonium nitrate. Acid deposition concentration measurement
2014/12/9
This paper examines the operational performance of the Community Multiscale Air Quality (CMAQ) model simulations for 2002–2006 using both 36-km and 12-km horizontal grid spacing, with a primary focus ...
CMAQ模式及其修正技术在上海市PM2.5预报中的应用检验
上海 PM2.5 CMAQ模式 修正预报
2015/6/5
利用 ＣＭＡＱ 空气质量数值预报模式对上海市 ＰＭ２．５浓度进行预报，选取 １０ 个囯控站点监测数据对预报进行验证评估．结果表明，ＣＭＡＱ
模式开展能够较好地模拟出 ＰＭ２．５的时间变化趋势及浓度水平，但总体处于低估的水平，偏低幅度约 ２５％，尤其在高污染阶段，模式的低估更为
突出，达 ３２％，这与p源清单的不确定性有关．为提高 ＰＭ２．５预报准确度，采用学习型线性回归方法对 ＰＭ２．５浓度的...
河北南部地区是霾污染最为严重的地区之一,本文应用MM5-Models-3/CMAQ空气质量模拟系统对河北及周边省市进行了区域尺度的模拟,并通过情景计算的方法估算了河北南部(包括石家庄、邢台、邯郸3市)、河北北部、京津2市、山西、河南、山东6个区域的人为源排放对石家庄、邢台细微颗粒物(PM2.5)及其主要成分和消光系数(Bext)的贡献率.结果表明,模拟时段内,石家庄市PM2.5的来源为河北南部65...
基于CMAQ模型的随机响应曲面不确定性传递分析方法实现与评价
随机响应曲面法 不确定性传递 CMAQ模型 蒙特卡洛法
2012/6/18
针对蒙特卡洛法在复杂环境模型进行不确定性传递分析时对计算机和时间资源需求巨大的缺点,本文引进快速高效的随机响应曲面法,并将其成功应用于CMAQ区域空气质量模型的不确定性传递分析,建立了基于CMAQ区域空气质量模型的不确定性分析概念框架.采用2阶和3阶随机响应曲面法,研究了排放清单不确定性对臭氧模拟结果的影响,并与1000次蒙特卡洛模拟结果进行对比.结果表明:3种模拟情景下臭氧浓度的均值几乎相同,模...
Modeling natural emissions in the Community Multiscale Air Quality (CMAQ) model – Part 2: Modifications for simulating natural emissions
natural emissions the Community Multiscale Air Quality (CMAQ) model
2011/1/19
The Community Multiscale Air Quality (CMAQ) model version 4.6 has been revised with regard to the representation of chlorine (HCl, ClNO2) and sulfur (dimethylsulfide, or DMS, and H2S), and evaluated a...
Modeling natural emissions in the Community Multiscale Air Quality (CMAQ) Model–I: building an emissions data base
Community Multiscale Air Quality an emissions data base
2010/8/13
A natural emissions inventory for the continental United States and surrounding territories is needed in order to use the US Environmental Protection Agency Community Multiscale Air Quality (CMAQ) Mod...
Eta-CMAQ air quality forecasts for O3 and related species using three different photochemical mechanisms (CB4, CB05, SAPRC-99): comparisons with measurements during the 2004 ICARTT study
Eta-CMAQ air quality forecasts three different photochemical mechanisms the 2004 ICARTT study
2010/8/12
A critical module of air quality models is the photochemical mechanism. In this study, the impact of the three photochemical mechanisms (CB4, CB05, SAPRC-99) on the Eta-Community Multiscale Air Qualit...
Estimating mercury emission outflow from East Asia using CMAQ-Hg
mercury emission outflow East Asia CMAQ-Hg
2010/2/21
East Asia contributes to nearly 50% of the global anthropogenic mercury emissions into the atmosphere. Recently, there have been concerns about the long-range transport of mercury from East Asia, whic...
