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首页> 外文期刊>Polar Research >Observing snowmelt dynamics on fast ice in Kongsfjorden, Svalbard, with NOAA/AVHRR data and field measurements
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Observing snowmelt dynamics on fast ice in Kongsfjorden, Svalbard, with NOAA/AVHRR data and field measurements

机译：利用NOAA / AVHRR数据和野外观测资料，观察斯瓦尔巴群岛孔斯菲约登快速融冰的融雪动力学

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Temporal snowmelt dynamics on fast ice in Kongsfjorden/Svalbard are studied for the period 1990-2003, using visible and near-infrared channels of the Advanced Very High Resolution Radiometer (AVHRR). Long-term radiation data from an adjacent Baseline Surface Radiation Network station, as well as extensive glaciological and meteorological field measurements on the melting ice in 2002 and 2003, are used to validate a snowmelt index derived from the satellite data. This study shows that the remote sensing data are in good agreement with the field observations. However, the temporal variability of atmospheric water vapour has an impact on the snowmelt index, and must be accounted for through atmospheric correction. The analysis of long-term satellite data provides valuable insight into the strength and rate of the snowvolume decay, and reveals a strong interannual variability of the snowmelt intensity. However, a precise date for determining melt onset requires clear-sky AVHRR data throughout the onset period.
机译：利用先进的超高分辨率辐射计（AVHRR）的可见和近红外通道，研究了1990-2003年Kongsfjorden / Svalbard快速冰上的时间融雪动力学。来自相邻的基准地面辐射网络站的长期辐射数据，以及2002年和2003年对融冰的大量冰川和气象现场测量，均用于验证从卫星数据得出的融雪指数。这项研究表明，遥感数据与实地观测非常吻合。但是，大气水蒸气的时间变化会影响融雪指数，因此必须通过大气校正来解决。长期卫星数据的分析为雪量衰减的强度和速率提供了宝贵的见解，并揭示了融雪强度的强烈年际变化。但是，用于确定熔体起爆的准确日期需要整个起爆期间天空晴朗的AVHRR数据。

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