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《Science of Surveying and Mapping》 2014-08
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Establishment of optimal nonlinear model on mass-change trends over Greenland ice sheets

CHAO Neng-fang;WANG Zheng-tao;CHAO Ding-bo;JIN Tao-yong;School of geodesy and Geomatics,Wuhan University;Key Laboratory of Geospace Environment and Geodesy,Ministry of Education;  
In this study,the mass variations trends over Greenland by means of linear regression and high-order polynomial regression model were investigated,and the comparative analysis was carried out by various model selection criteria including polynomial hypotheses testing,R-squared adjusted,information criterion and cross-validation.Trough contrasting the trends by linear fitting taken over different analysis periods and non-linear regression model,it showed that the mass variations trends over Greenland by the second order polynomial were best represented,moreover,both the period of investigation and the adopted trend model had a strong impact on the quantification of mass variation trends from the Gravity Recovery and Climate Experiment(GRACE).
【Fund】: 国家自然科学基金资助项目(41074014 41274032);; 973项目(2013CB733301)
【CateGory Index】: P223;P343.6
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