介绍了一种新的CO2探空测量方法。其原理是利用比尔歩格朗伯定律，使用非分光红外法，通过选择合适的红外光源和红外探测器，设计了合理的电路，在定标的基础上将测量的光强转换成CO2浓度，制作出可用于探空测量的实验装置。通过与EC9820型CO2分析仪的地面对比实验，结果表明，连续24 h测量的误差范围在-10×10-6~10×10-6，平均误差为3.76×10-6，验证了设计的可行性，基本满足了大气CO2探空的精度需求，为进一步研制CO2探空仪提供了参考。

A new method is presented for atmospheric CO2 balloonsonde measurement. Based on Beer-Bouguer-Lambert law and non-dispersed infrared (NDIR) technique, an experimental device is designed and developed. A infrared LED is used to produce suitable light source, and infrared LED detectors and a proper electronic circuit designed are used to transform light intensity into electrical signals in the experimental device. Calibration method for CO2 measurement is also presented. A comparison experiment is carried out for continuous 24 h on ground with EC9820 analyzer. Result shows that measurement error ranges from -10×10-6 to 10×10-6, and standard deviation is 3.76×10-6, which basically satisfies the precision demand for atmospheric CO2 measurement. The feasibility of CO2 measurement has been validated.