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OALib Journal期刊
ISSN: 2333-9721
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玛纳斯河流域山区雪粒径hj-1卫星反演
DOI: 10.13232/j.cnki.jnju.2015.009, PP. 987-995
Keywords: 玛纳斯河流域,hj-1,渐近式辐射传输模型,雪粒径反演
Abstract:
雪粒径是影响雪面能量收支和表征积雪状态的重要参数,利用遥感手段定量反演雪粒径信息对雪水当量估算、流域水资源管理和局地气候变化研究等具有重要意义.针对新疆玛纳斯河流域山区积雪表层粒径地遥感反演,以渐近式辐射传输模型为基础建立雪粒径反演模型,利用hj-1卫星多光谱数据得到玛纳斯河流域山区冬季积雪期和春季融雪期的雪粒径反演结果,并利用地面实测数据对反演结果进行验证,最后分析雪粒径随海拔的分布特征.结果表明:建立的雪粒径反演模型能够较好地描述雪粒径与卫星遥感信号间的定量关系;雪粒形状对反演结果影响较大,当选择适当的雪粒形状时,雪面粒径反演值与实测值较为吻合;海拔对雪面粒径的分布影响较大.
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