GB/T 33867-2017 in English

VALID

Measurement for photosynthetic active radiation―Hemispherical radiometer method

Issued on:2017-07-12
Implemented on:2018-02-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 33867-2017
Document status:	VALID
Title in English:	Measurement for photosynthetic active radiation―Hemispherical radiometer method
Title in Chinese:	光合有效辐射测量半球向辐射表法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-07-12
Implemented on:	2018-02-01
ICS Classification:	07.060-Geology. Meteorology. Hydrology
Chinese Classification:	A47-Meteorology
Professional Classification:	GB-National Standard
Related Keywords:	photosynthetic active radiation ― hemispherical radiometer method introduction gb/t hemispherical photosynthetic active radiometer photosynthetically active radiation measurement standard background active radiation active radiation range
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《GB/T 33867-2017光合有效辐射测量半球向辐射表法》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

GB/T 33867—2017 Interpretation of the Hemispherical Pyrheliometer Method for Photosynthetically Active Radiation Measurement

Standard Background and Technical Evolution

Photosynthetically Active Radiation (PAR) is the energy source for photosynthesis in plants, and its measurement is of great significance in agriculture, meteorology and environmental science. The GB/T 33867—2017 standard regulates the measurement method of the hemispherical pyrheliometer method to ensure the consistency and accuracy of the data.

With the development of solar energy utilization technology, the demand for accurate measurement of photosynthetically active radiation is increasing. This standard combines the technical requirements of the World Meteorological Organization (WMO) and the World Climate Research Program (WCRP) and reflects the trend of technological evolution.

Measurement parameters	Characteristics of the hemispherical pyrheliometer method	Data collection requirements
Photosynthetically active radiation range	400nm ~ 700nm	Real-time collection and calculation of minute, hour and daily irradiance
Response time	≤10ms	Sampling interval is 1s
Measurement error control	Irradiance error≤5%	Data quality control includes upper and lower limit checks and change rate verification

Terms and Definitions

Photosynthetically Active Radiation (PAR): refers to solar radiation with a wavelength between 400nm and 700nm, which is the main energy source for photosynthesis in plants.

Hemispherical photosynthetic active radiometer: Hemispherical photosynthetic active radiometer is used to measure the PAR irradiance received by a given plane within a 2π solid angle from above, and is suitable for a variety of environmental monitoring scenarios.

Implementation Recommendations and Practical Application Cases

Site Selection:Avoid places with severe air pollution such as local fog and smoke, and ensure that there are no obstacles with an altitude angle exceeding 5° within the field of view of the instrument.

Data Collection and Processing:It is recommended to use a data logger that meets the standard requirements and calibrate the equipment regularly to ensure measurement accuracy. For example, hemispherical pyranometers are installed in agricultural greenhouses to monitor PAR values in real time and provide a scientific basis for crop growth.

More samples: QC/T 942-2021 GB 50021-2001(2009) JJG 21-2008

Sample only — not a preview of GB/T 33867-2017

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