若尔盖湿地近地表气象要素分析

Analysis of Meteorological Elements in the Near Surface of Zoige Wetland

摘要: 利用2015年夏季若尔盖地区观测数据对若尔盖湿地区域近地表气温、土壤温度、近地表相对湿度、土壤湿度、风向、近地表辐射进行了分析。研究发现，近地表及地表温度日较差不稳定，土壤温度的日较差比近地表气温的日较差要小，土壤较深层的温度极值出现时段相较于浅层有明显滞后。相对湿度有明显的日变化，于日出前达到最大值，太阳高度角最高时达到最小值，深层的变化时段比浅层滞后。若尔盖地区7~9月风向以南风为主。此外，向下短波辐射与向上短波辐射日变化呈单峰型，且在数值上明显大于向上短波辐射，向下长波辐射和向上长波辐射的月变化趋势基本相同。此外，若尔盖地区以潜热输送为主要能量输送路径。

Abstract: The near-surface air temperature, soil temperature, near-surface relative humidity, soil moisture, wind direction and near-surface radiation of the Zoige wetland area were analyzed using the ob-servation data of the Zoige area in the summer of 2015. The study found that the near-surface and surface temperature are relatively unstable, the daily temperature difference of the soil tempera-ture is smaller than that of the near-surface temperature, and the temperature extreme value of the deeper layer of the soil has a significant lag compared with the shallow layer. There is a signif-icant daily variation in relative humidity, reaching a maximum before sunrise, reaching a minimum at the highest sun angle, and a deep change in the deep layer. The wind direction of the Zoige region is mainly southerly from July to September. In addition, the diurnal variation of the downward short-wave radiation and the upward short-wave radiation is unimodal, and is numerically significantly larger than the upward short-wave radiation. The monthly trend of the downward long-wave radiation and the upward long-wave radiation is basically the same. In addition, the Zoige area uses latent heat transport as the main energy transport path.