冰川均衡调整对全球海水质量变化的影响
Influence of GIA on Ocean Mass Variations
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摘要: 利用3个海平面变化冰川均衡调整(GIA)模型———RF3L20、Pau-5-Ra和Pel-5-VM4-R,分别对利用GRACE数据和联合卫星测高及海水温盐度数据解算2004~2010年海水质量变化趋势进行GIA改正。比较改正后的结果得到,用Pel-5-VM4-R模型改正后,以上两种方法得到的海水质量变化趋势较为一致,而用另外两个GIA模型改正后,两种方法得到的结果相差较大。本研究显示,在利用GRACE资料反演海水质量变化趋势时,用Pel-5-VM4-R模型进行GIA改正相对合适,并且在2004~2010年,海水质量变化对全球平均海平面变化贡献为1.5~2.0mm/a。Abstract: We use three GIA models (R F3L20, Pau-5-R a and Pel-5-VM4-R) to correct the re-sult of the ocean mass variations derived from GRACE (Gravity Recovery and Climate Exper-iment) during 2004 - 2010 . The corrected results are compared with the ocean mass variations estimated from combination of the Altimetry Satellite data and the ARGO (Array for Real-time Geostrophic Oceanography) data. We find that the result of 'Altimeter-Argo' agrees better with the ocean mass variations corrected by Pel-5-VM4-R GIA model than the correc-tion results with the other two GIA models. Base the above results, we recommend that Pel-5-VM4-R model is more appropriate to correct the ocean mass variations, and the contribu-tion of the ocean mass variations to the mean sea level is 1.5-2.0mm/a.