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评估气溶采样时间间隔对CWT和PSCF源接收器模型的影响:一个关键的视角

E Chham¹, J A G Orza¹

¹SCOLAb, Fisica Aplicada, Miguel Hernandez University, Elche 03202, Spain.

The Science of the total environment

|March 14, 2025

概括

从一天到一周的采样时间间隔不会显著影响使用度加权轨迹 (CWT) 和潜在源贡献函数 (PSCF) 方法的源标识. 一个部门的方法提高了检测低排放源的精度.

科学领域:

大气科学大气科学
环境化学环境化学
空气质量监测空气质量监测

背景情况:

在环境空气研究中,多天采样是常见的.
源-受体轨迹统计方法如CWT和PSCF用于源识别.
采样时间间隔对这些方法的影响尚未完全理解.

研究的目的:

调查采样时间间隔如何影响CWT和PSCF方法的有效性.
评估轨迹高度和数据过对源识别准确性的影响.
评估CWT和PSCF在识别各种源类型,包括连续低强度源方面的表现.

主要方法:

分析了使用每日至每周采样分辨率的长期七和PM10度.
应用度加权轨迹 (CWT) 和潜在源贡献函数 (PSCF) 方法.
使用内核密度估计来过数据,并引入了部门分析方法.

主要成果:

从一天到一周的抽样间隔并没有显著影响来源识别结果.
轨道高度至关重要;为了检测西班牙东南部的北非尘埃来源,需要3000米的向后轨道.
比起CWT,PSCF更准确地确定了源位置,CWT在来源上识别了更广泛的空气质量模式.
这两种方法都在与连续的低强度排放源作斗争.

结论:

采样持续时间对CWT和PSCF在一周时间内来源识别有效性的影响很小.
对运输模式和适当的轨道高度的预先了解对于准确解释模型输出至关重要.
与CWT和PSCF集成的部门方法显著提高了识别低排放源的精度.

关键词:

气溶传输模拟模型在CWT中使用.这是PSCF.采样时间间隔的时间间隔.

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