CAJ | 학술논문

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。
설립경시영향설면능량수지화표정적설상태적중요삼수，이용요감수단정량반연설립경신식대설수당량고산、류역수자원관리화국지기후변화연구등구유중요의의。침대신강마납사하류역산구적설표층립경지요감반연，이점근식복사전수모형위기출건립설립경반연모형，이용 HJ-1위성다광보수거득도마납사하류역산구동계적설기화춘계융설기적설립경반연결과，병이용지면실측수거대반연결과진행험증，최후분석설립경수해발적분포특정。결과표명：건립적설립경반연모형능구교호지묘술설립경여위성요감신호간적정량관계；설립형상대반연결과영향교대，당선택괄당적설립형상시，설면립경반연치여실측치교위문합；해발대설면립경적분포영향교대。
Snow grain size is a key parameter to control the snow surface energy balance and represent the state of snow.The quantitative retrieval of surface snow grain size using remote sensing techniques is significant to many re-searches on the estimation of snow water equivalent,basin water resources management and local climate change.In this study i)a snow grain size retrieval model was developed based on Asymptotic Radiative Transfer(ART)model for the mountainous areas in Manasi River Basin,Xinjiang Province;ii)the snow grain size in both winter snow accu-mulating and spring snow melting periods was obtained using the multi-spectral observations from the environment and disaster monitoring and forecasting satellite (HJ-1 );iii)the retrieval results were validated using the ground sampling data;and iv)the grain size distribution in altitude was analyzed.The results indicate that the developed model could accurately describe the relationship between snow grain size and remote sensing data,the snow grain shape has a considerable impact on the retrieval accuracy that retrieved snow grain size has a good agreement with ground measurements only when proper snow grain shape was considered in the model,and the distribution of snow grain size is dependent significantly on altitude.