利用逐步订正法构建Argo网格资料集的研究

Study on the establishment of gridded Argo data by successive correction

利用逐步订正法构建了2002年1月至2009年12月期间太平洋海域（60°S-60°N,120°E-80°W）的逐月温、盐度网格资料,其垂向分辩率在5~1 950 m水深范围内为48层,水平分辨率为1°×1°。对网格资料的误差分析表明,整个太平洋海域温度和盐度标准差的平均值分别为0.097℃和0.017。将构建的Argo（Array for Real-time Geostrophic Oceanography,Argo）网格资料集与研究海域获取的CTD（Conductance-Temperature-Depth,）、TAO（Tropical Atmosphere/Ocean array,TAO）和WOA05（World Ocean Alta 5）等资料集进行的比较和分析发现,2006年之前,由于Argo资料相对较少,导致构建的网格资料集存在一定的误差;而在2006年以后的Argo网格资料则与历史观测资料比较一致。况且,由构建的Argo网格资料集揭示的太平洋海域温、盐度分布的主要特征来看,其与WOA05资料集所反映的结果也十分吻合,且前者揭示的特征比后者要更加细致些。这充分说明了,利用逐步订正法构建的Argo网格资料集是值得信赖的,也是可靠的。

Gridded monthly temperature and salinity of the Pacific Ocean from January 2002 to December 2009 are reestablished with 48 levels from 5m to 1950 m vertically and horizontal resolution of 1°×1° by successive correction. Error analysis of the grid data showed that the temperature standard deviation （ST）error for the whole Pacific Ocean was generally 0.097 ℃ and that of salinity was 0.017. The Argo grid data were compared with the CTD sections, TAO and WOA05 datasets respectively. The results showed that the Argo grid data were in good agreement with historic observation data after 2006, and before 2006, the Argo grid data had some errors because the Argo data were relatively less. In addition, Argo grid data can reveal the regional temperature and salinity distribution and main characteristics of the Pacific. Comparing with WOA05 data, Argo grid data make,comparative consistency, revealing finer features than WOA05. Therefore, the Argo grid data re-established by successive correction is worthy of trust and reliability.