GB/T 35233-2017 in English
VALIDSpecifications for surface meteorological observation-Soil temperature
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 35233-2017地面气象观测规范 地温》由TC507（全国气象仪器与观测方法标准化技术委员会）归口，主管部门为中国气象局。
Introduction
1. Standard Overview and Background Analysis
National Standard of the People's Republic of China GB/T 35233-2017 "Standard Ground Temperature for Ground Meteorological Observation" is an important standard formulated by the China Meteorological Administration to standardize the measurement of ground temperature in ground meteorological observation. This standard specifies in detail the technical requirements, observation methods and configuration of instruments and equipment for ground temperature observation, and is applicable to ground meteorological observation work across the country.
2. Background and Significance of Standard Formulation
As an important component of meteorological elements, ground temperature is of great significance to climate change research, agricultural meteorological forecasting and disastrous weather warning. The introduction of GB/T 35233-2017 fills the gap in the field of ground temperature observation in China and provides a standardized basis for scientifically and accurately obtaining soil temperature data.
3. Comparative analysis of standard frameworks
| Standard dimensions | Technical indicators | Applicable scenarios | Observation accuracy |
|---|---|---|---|
| Surface temperature | 0~1cm depth measurement | Bare soil surface | ±0.2℃ |
| Shallow ground temperature | 5cm, 10cm, 15cm, 20cm depth measurement | Cultivated layer soil temperature monitoring | ±0.3℃ |
| Deep ground temperature | 40cm, 80cm, 120cm, 320cm depth measurement | Groundwater research | ±0.5℃ |
4. Practical application case analysis
Application of ground temperature observation in agricultural meteorology:Through standardized ground temperature measurement, the law of soil temperature changes can be accurately grasped, providing a scientific basis for crop sowing period, growth cycle and disease prediction.
5. Observation instruments and equipment
According to the requirements of GB/T 35233-2017 standard, ground temperature observation mainly uses the following instruments:
- Glass liquid ground temperature meter: including surface temperature meter, shallow ground temperature meter and deep ground temperature meter.
- Platinum resistance sensor: used for data acquisition of automatic observation system.
6. Observation methods and technical requirements
- Manual observation: The highest and lowest values of the surface temperature shall be observed daily, and the shallow ground temperature shall be measured regularly at a fixed depth.
- Automatic observation: Continuously record the surface temperature, grass surface temperature and snow surface temperature in minutes and hours, and extract extreme values from the minute data.
7. Maintenance and management
Daily maintenance of ground temperature observation instruments includes:
- Keep the observation site loose and flat, without weeds.
- Regularly check whether the sensor installation depth and angle meet the requirements.
- During the rainy season or heavy precipitation, use protective devices to prevent instrument drift.
8. Implementation suggestions
Standardization implementation suggestions:
- Select observation sites and instruments strictly in accordance with standard requirements.
- Establish a regular inspection and calibration system to ensure measurement accuracy.
- Strengthen the analysis and application of observation data to improve the benefits of meteorological services.
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