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2007年7月9日-8月30日在科其喀尔巴西冰川的表碛区进行了冰崖消融试验,通过在不同海拔、坡向和坡度冰崖的裸露冰面上栽设消融杆的方法,获得了33个有效的冰崖消融观测数据,结合观测点附近的自动气象站所获取的同期气温资料,计算了各个冰崖的度日因子,并对其变化特征进行了分析.结果表明:表碛区内冰崖的度日因子变化较大,平均为4.81 mm.℃-1.d-1,小于青藏高原及其它地区冰川的度日因子.研究区度日因子较小与冰面消融对于温度变化的敏感性及平均气温较高相关,而且这些因素通过温度随海拔的梯度效应影响表碛区内冰崖度日因子.冰崖坡向的变化也对度日因子产生了影响,总体表现为NEE-SE方向及SW-W方向的度日因子较大,NWW-N-NE方向的较小,S方向的最小,这主要与该地区的辐射、气温等气象条件的变化特征有关.研究还表明,冰崖的坡度对度日因子的影响较小.
From July 9 to August 30, 2007, an ice-cliff ablation test was carried out on the table moraine of the glacier in the Kocatka region. By means of ablating the exposed ice on ice cliffs of different elevations, slopes and slopes 33 effective ice-cliff ablation observation data were obtained, and the daily-temperature factor of each ice-cliff was calculated and the variation characteristics were calculated based on the temperature data acquired by the automatic weather station near the observation point. The degrees of diurnal change of ice cliffs in the area of Qiangze are larger with an average of 4.81 mm ℃ -1 d -1, which is less than that of the glaciers in the Qinghai-Tibet Plateau and other areas. The ablation is related to the sensitivity to temperature change and the higher average temperature, and these factors affect the ice age factor in ice mound through the gradient effect of temperature with altitude, and the change of slope ice age also has an impact on the degree day factor, The overall daily occurrence factor of NEE-SE and SW-W is larger, NWW-N-NE is smaller and S is the smallest, which is mainly related to the change of meteorological conditions such as radiation and air temperature in the area The study also shows that the slope of the ice cliff has less effect on the diurnal factor.