The ice sheet and glaciers of Antarctica and Greenland represent the largest sources of freshwater on planet Earth. The understanding and quantification of their dynamic properties such as albedo, precipitation, ice mass movement, and ice elevation changes are critical for the improved climate and mass balance models. The present study utilizes space-borne optical and synthetic aperture radar (SAR) imagery to measure the ice surface velocity at high spatial resolution for a part of the central Dronning Maud Land (cDML), East Antarctica. The datasets from Landsat-8 and Sentinel-1 SAR satellite are used for ice stream velocity estimation using feature-offset tracking and differential interferometric SAR (DInSAR) methods. The derived velocity products are validated with ground based stakes network at annual time scale. The fundamental ice flow laws are used to estimate the ice outflux or discharge for selected ice stream drainage basins of cDML at fluxgate locations. The ice stream basin has been delineated using combination of elevation, slope and continental scale velocity maps. The ice influx for study area is estimated using ECMWF fifth generation reanalysis (ERA5) and Regional Atmospheric Climate Model (RACMO) v2.3 model outputs. The estimated influx and outflux are in the ranges of 0.18–4.167 Gt/y and 0.201 to 1.278 Gt/y respectively, indicating net positive mass balance for the selected area.

南极洲和格陵兰的冰盖和冰川是地球上最大的淡水来源。对其动态特性（如反照率、降水、冰团运动和冰高变化）的理解和量化对于改进气候和质量平衡模型至关重要。本研究利用星载光学和合成孔径雷达 (SAR) 图像以高空间分辨率测量南极洲东部 Dronning Maud Land (cDML) 中部的冰面速度。Landsat-8 和 Sentinel-1 SAR 卫星的数据集用于使用特征偏移跟踪和差分干涉 SAR (DInSAR) 方法进行冰流速度估计。派生的速度产品在年度时间尺度上通过基于地面的桩网络进行验证。基本冰流定律用于估计 cDML 的选定冰流排水盆地在通量门位置的冰流出或排放。冰流盆地已使用高程、坡度和大陆尺度速度图的组合进行描绘。使用 ECMWF 第五代再分析 (ERA5) 和区域大气气候模型 (RACMO) v2.3 模型输出估算研究区域的冰流入量。估计的流入量和流出量分别在 0.18-4.167 Gt/y 和 0.201 到 1.278 Gt/y 的范围内，表明所选区域的净正质量平衡。使用 ECMWF 第五代再分析 (ERA5) 和区域大气气候模型 (RACMO) v2.3 模型输出估算研究区域的冰流入量。估计的流入量和流出量分别在 0.18-4.167 Gt/y 和 0.201 到 1.278 Gt/y 的范围内，表明所选区域的净正质量平衡。使用 ECMWF 第五代再分析 (ERA5) 和区域大气气候模型 (RACMO) v2.3 模型输出估算研究区域的冰流入量。估计的流入量和流出量分别在 0.18-4.167 Gt/y 和 0.201 到 1.278 Gt/y 的范围内，表明所选区域的净正质量平衡。