海面上行星边界层微结构的探空测量

Observation of Atmospheric Microstructural of Planet Boundary Layer by Radiosonde

用自行研制的探空仪于1999年6月在东海进行了探空实验,得到了海面上大气温度、湿度、气压、C_n^2廓线。资料分析表明:800m以下海面上温度的日变化不超过3℃,逆温强度较弱。当纬度增加1℃,海表面气温减少1℃。C_n^2随高度迅速下降,从海表面直至500m达到相对小的区域,在500～2000m高度内C_n^2基本上保持不变。湍流峰值往往出现在位温梯度较大的地方。并对海面上位温廓线日变化进行了数值模拟。

The experiment took place during June 1999 at the East Sea in China using the radiosondes developed by us, which measured vertical profiles of atmospheric pressure, temperature, relative humidity and the refractive index structure parameter C2n. The diurnal variation of temperature is less than 3℃ above sea surface up to 800 m, the surface-based nocturnal inversion is weak. The atmosphere temperature on sea surface decreases 1℃ when latitudes increase 1 degree. The measured profile shows the rapid falloff of C2n from the surface to the relatively quiet about 500 m height. The C2n appears constant with altitude from 500 m to 2000 m height. The measured and modeled profiles of potential temperature have been compared.