利用被动微波探测青海湖湖冰物候变化特征

汪关信, 张廷军, 李晓东, 何灼伦, 李宇星

Detecting changes of ice phenology using satellite passive microwave remote sensing data in Qinghai Lake

Guanxin WANG, Tingjun ZHANG, Xiaodong LI, Zhuolun HE, Yuxing LI

图4 被动微波TB（18V，18H）、TB（19V，19H）遥感数据与实测湖冰物候特征曲线 注：图（a）、（b）中竖线A，B，C，D分别表示观测和MRR解译得到的初冰日、封冻日、消融日及完全消融日；A_19H表示19 GHz水平极化升轨亮度温度，D_19V为19 GHz垂直极化降轨亮度温度，以此类推

Fig.4 Characteristics of lake ice phenology and passive microwave in TB（18V，18H），TB（19V，19H），lines A，B，C，and D indicate the ice onset day，ice on day，initial ice melt day，and the last day of lake ice，which are extracted by field observation and MRR data. A_19H is brightness temperature of ascending orbit in 19 GHz with Horizontal polarization，D_19V is brightness temperature of descending orbit in 19 GHz with vertical polarization