Understanding Weather Factors Better to Strengthen Poor Air Qual
「Understanding Weather Factors Better to Strengthen Poor Air Qual」於資料集「MajorEnvironmentalPolicies」由單位「行政院環境保護署」的陳小姐所提供，聯繫電話是(02)23117722#2753,(02)23117722#2756，最近更新時間為：2023-07-30 01:03:45。 欄位編號的內容是3369 ， 欄位標題的內容是Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions ， 欄位摘要的內容是Air Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions
At the beginning of November 2015, Taiwan experienced a spell of poor air quality that resulted in the EPA asking the Ministry of Economic Affairs (MOEA) to request the Taichung Power Plant for load curtailment. To better understand the air quality improvement efficiency resulting from the load curtailment, the EPA used an air quality model to estimate the improvement efficiency. The results suggested that the degree of improvement and the locations with better air quality were highly related to weather conditions. The EPA will continue to conduct research on suitable restrictive measures that can be written into law and applied under different weather conditions. ， 欄位全文的內容是Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions
At the beginning of November 2015, Taiwan experienced a spell of poor air quality that resulted in the EPA asking the Ministry of Economic Affairs (MOEA) to request the Taichung Power Plant for load curtailment. To better understand the air quality improvement efficiency resulting from the load curtailment, the EPA used an air quality model to estimate the improvement efficiency. The results suggested that the degree of improvement and the locations with better air quality were highly related to weather conditions. The EPA will continue to conduct research on suitable restrictive measures that can be written into law and applied under different weather conditions.
The spell of poor air quality over a period of a few days at the start of November 2015 led the EPA to take emergency action under its poor air quality day protocols. The EPA asked the MOEA to request the operators of Taichung Power Plant to curtail a load of 180 MW. The air quality assessment model showed that the load curtailment of 180 MW led to reductions of 0.01%~0.11% in fine particulate matter concentrations at monitoring stations in central Taiwan. Load curtailment of 1,100 MW led to reductions of 0.13%~0.7% at the same stations, while load curtailment of 2,200 MW led to reductions of 0.28%~1.46% at said monitoring stations.
Air quality is affected by emissions from pollution sources, the weather, local topography, and other factors. Of these, the weather has the biggest impact upon short-term changes in air quality, especially the diffusion and transmission mechanisms in the atmosphere. These two mechanisms are primarily affected by wind speed and meteorological conditions in the atmospheric mixed layer. The height of the atmospheric mixed layer represents the height to which pollutants can diffuse vertically. The pollutants are dispersed evenly throughout this layer by the action of turbulence. The higher the atmospheric mixed layer, the stronger the convection and the higher the chance of pollutants rising up and being diluted. Wind strength, by contrast, determines the scope of the area that pollutants can be transmitted in a horizontal direction: The stronger the wind, the further pollutants can be carried. The lower air currents that accompany the autumn and winter northeast seasonal winds – combined with lower surface temperatures and weaker sunlight – lead to a more stable atmosphere. The atmospheric mixed layer thus hangs lower and pollutants do not readily disperse in a vertical direction in autumn and winter.
Under such meteorological conditions, improving air quality requires significantly tougher and more wide-ranging restrictions on the ground. Since different weather conditions have differing degrees of impact upon air quality, the EPA is continuing to conduct research on suitable restrictive measures that can be written into law and applied to different weather conditions. ， 欄位年度的內容是2015 ， 欄位月份的內容是12 ， 欄位卷的內容是18 ， 欄位期的內容是12 ， 欄位順序的內容是 ， 欄位倒序的內容是 ， 欄位分類的內容是air ， 欄位標題2的內容是 ， 欄位檔案位置的內容是V18/V18-12 。
編號
3369
標題
Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions
摘要
Air Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions At the beginning of November 2015, Taiwan experienced a spell of poor air quality that resulted in the EPA asking the Ministry of Economic Affairs (MOEA) to request the Taichung Power Plant for load curtailment. To better understand the air quality improvement efficiency resulting from the load curtailment, the EPA used an air quality model to estimate the improvement efficiency. The results suggested that the degree of improvement and the locations with better air quality were highly related to weather conditions. The EPA will continue to conduct research on suitable restrictive measures that can be written into law and applied under different weather conditions.
全文
Understanding Weather Factors Better to Strengthen Poor Air Quality Day Restrictions At the beginning of November 2015, Taiwan experienced a spell of poor air quality that resulted in the EPA asking the Ministry of Economic Affairs (MOEA) to request the Taichung Power Plant for load curtailment. To better understand the air quality improvement efficiency resulting from the load curtailment, the EPA used an air quality model to estimate the improvement efficiency. The results suggested that the degree of improvement and the locations with better air quality were highly related to weather conditions. The EPA will continue to conduct research on suitable restrictive measures that can be written into law and applied under different weather conditions. The spell of poor air quality over a period of a few days at the start of November 2015 led the EPA to take emergency action under its poor air quality day protocols. The EPA asked the MOEA to request the operators of Taichung Power Plant to curtail a load of 180 MW. The air quality assessment model showed that the load curtailment of 180 MW led to reductions of 0.01%~0.11% in fine particulate matter concentrations at monitoring stations in central Taiwan. Load curtailment of 1,100 MW led to reductions of 0.13%~0.7% at the same stations, while load curtailment of 2,200 MW led to reductions of 0.28%~1.46% at said monitoring stations. Air quality is affected by emissions from pollution sources, the weather, local topography, and other factors. Of these, the weather has the biggest impact upon short-term changes in air quality, especially the diffusion and transmission mechanisms in the atmosphere. These two mechanisms are primarily affected by wind speed and meteorological conditions in the atmospheric mixed layer. The height of the atmospheric mixed layer represents the height to which pollutants can diffuse vertically. The pollutants are dispersed evenly throughout this layer by the action of turbulence. The higher the atmospheric mixed layer, the stronger the convection and the higher the chance of pollutants rising up and being diluted. Wind strength, by contrast, determines the scope of the area that pollutants can be transmitted in a horizontal direction: The stronger the wind, the further pollutants can be carried. The lower air currents that accompany the autumn and winter northeast seasonal winds – combined with lower surface temperatures and weaker sunlight – lead to a more stable atmosphere. The atmospheric mixed layer thus hangs lower and pollutants do not readily disperse in a vertical direction in autumn and winter. Under such meteorological conditions, improving air quality requires significantly tougher and more wide-ranging restrictions on the ground. Since different weather conditions have differing degrees of impact upon air quality, the EPA is continuing to conduct research on suitable restrictive measures that can be written into law and applied to different weather conditions.
年度
2015
月份
12
卷
18
期
12
順序
倒序
分類
air
標題2
檔案位置
V18/V18-12
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