QX/T 479-2019 in English

VALID

Evaluation on meteorological condition index of PM 2.5 pollution

Issued on:2019-04-28
Implemented on:2019-08-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $180.00
$175.00

Standard No:	QX/T 479-2019
Document status:	VALID
Title in English:	Evaluation on meteorological condition index of PM 2.5 pollution
Title in Chinese:	PM2.5 气象条件评估指数(EMI)
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-04-28
Implemented on:	2019-08-01
Professional Classification:	QX-Meteorology
Related Keywords:	meteorological condition index s-1 meteorological element action mechanism boundary layer impact case meteorological assimilation data s-1 diffusion term ±0.05 s-1 transport term
Related Topics:	emi PM2.5 pm2.5 source pm2.5 standard pm2.5+ pm2.5 analysis pm2.5 detection Tomorrow pm2.5 pm2.5 test part pm2.5 pm2.5 standard pm2.5 analysis pm2.5 method Meteorology + Thirteenth Five-Year + Evaluation Air ten evaluation test pm2.5 pm2.5 in each city pm2.5 meter Air ten evaluation pm2.5 agent pm pm2.5 pm2.5/ pm2.5 grimm Weather condition dome pm2.5 Weather condition pm2.5 utilization emi+ pm2.5 detection pm2.5 a week pm2.5 secondary last week pm2.5 once pm2.5 pm2.5 test pm2.5 this week PM2.5 at home pm2.5 Level 2 Air pm2.5 at home how much pm2.5 Degree Score Assessment pm2.5 mesh

Introduction

Analysis of EMI Standard Technical Framework

Core Parameters	Physical Meaning	Calculation Formula	Typical Value Range
Emission Deposition Term (E)	Net Effect of PM2.5 Surface Budget	E=(sd)/C₀H	±0.05 s^-1
Transport Term (T)	Three-Dimensional Transport Effect	T=-(u∂C/∂x+v∂C/∂y+w∂C/∂z)	±0.1 s^-1
Diffusion term (D)	Turbulent mixing effect	D=∇·(K∇C)	-0.2~0.3 s^-1

Meteorological element action mechanism

Boundary layer impact case

When the mixing layer height decreases from 500m to 200m, the diffusion term D increases by 40%, corresponding to the PM2.5 accumulation process under calm weather in the Beijing-Tianjin-Hebei region in winter.

Implementation and Application Recommendations

When using the CUACE-EMI model system, ensure that the temporal resolution of meteorological assimilation data is ≤ 6 hours
For inter-year comparisons, the 2015 base year data for fixed emission sources should be used
For regional assessments, a 15km×15km grid is recommended

Technology Evolution Analysis

Compared to the PLAM index in QX/T 269-2015, EMI innovatively:

Introduces the concept of 1500m air column integration

Establishes a emissions-meteorology bivariate separation model

Achieves quantitative attribution (Equations B.5/B.6)

More samples: NB/T 47013.2-2015 GB 18306-2015 QC/T 942-2021

Sample only — not a preview of QX/T 479-2019

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