QX/T 385-2017 in English
VALIDMeteorological index of clothing
- Issued on:2017-10-30
- Implemented on:2018-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$127.00
| Standard No: | QX/T 385-2017 |
| Document status: | VALID |
| Title in English: | Meteorological index of clothing |
| Title in Chinese: | 穿衣气象指数 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2017-10-30 |
| Implemented on: | 2018-03-01 |
| Professional Classification: | QX-Meteorology |
| Related Keywords: | index level thickness range typical clothing
standard clothing weather index clothing thickness meteorological index early winter clothing |
| Related Topics: | gas phase breakthrough
meteorological peak weather index pfefferkorn index t+385 |
Introduction
Interpretation of the core content of the standard
Clothing weather index is a meteorological service indicator for quantifying clothing thickness. It calculates the clothing thickness H value through the comprehensive calculation of temperature, humidity and wind speed to form a 7-level grading system:
| Index level | Thickness range | Typical clothing | Applicable scenarios |
|---|---|---|---|
| Level 1 (Severe Winter) | H>25.0 | Thick down jacket + gloves | Extreme cold below -10℃ |
| Level 3 (Early Winter) | 8.0| Jacket + sweater | 0-5℃ cold and damp weather | |
| Level 5 (Spring and Autumn) | 1.5| Long-sleeved T-shirt + jacket | 15-20℃ transition season | |
| Level 7 (Midsummer) | H≤-1.2 | Short-sleeved shirt + shorts | High temperature above 30℃ |
Key Technology Analysis
Clothing Thickness Algorithm
The basic formula adopts piecewise function design for different temperature and humidity combinations:
- Low temperature and high humidity (T≤5℃ RH≥60%): add 40% humidity correction factor
- Medium temperature range (5
- High temperature and high humidity (T>26℃ RH≥60%): introduce negative humidity correction
Dual correction mechanism
The final H value needs to be superimposed with two types of correction factors:
- Weather correction (εwea): subtract 0.5 units on sunny days
- Season correction (εsea): ±0.5 units in spring and autumn
Standard implementation recommendations
Meteorological service application
It is recommended to combine class=instrument>Smart Grid Forecast Implementation:
- Morning index: based on the maximum temperature forecast of the day
- Regional differentiation: considering the urban heat island effect
- Special groups: ±1 level adjustment for the elderly/children
Commercial field extension
The clothing retail industry can establish:
- Index-product mapping database
- Dynamic window display system
- LBS-based push service
Technical Evolution Analysis
Compared with the first edition of the standard published by the Beijing Meteorological Bureau in 1999, QX/T385-2017 has the following major improvements:
| Version comparison dimensions | 1999 version | 2017 national standard |
|---|---|---|
| Parameter system | Temperature only | Three elements of temperature, humidity and wind |
| Grading granularity | Level 5 | Level 7 |
| Regional adaptability | Northern cities | Nationally applicable |
Application example in Shanghai
Meteorological data for March 15, 2022:
- T=14℃, RH=68%, v=2.3m/s
- Calculated H'=9.2 → Spring correction+0.5 → H=9.7
- Corresponding to Level 3 index: Early winter clothing is recommended
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