Data recovery of A06 and A07 WOCE cruises

Abstract. The WOCE cruises were carried out during the 1990s and were included in GLODAP, which is an easily usable, available and fully calibrated global database. A_T and C_T data, together with the rest of carbon variables, were subjected to rigorous quality control and some adjustments were done assuming biases, in case of A_T and C_T, not greater than ±6 μmol kg⁻¹ and ±4 μmol kg⁻¹, respectively. The A06 and A07 cruises were deleted from GLODAP database owing to A_T and C_T data were not suitable for analysis. However, these data are still available in CLIVAR and Carbon Hydrographic Data Office web site, demonstrated the unreliable quality of A_T and C_T, but contrarily, the more realistic profiles of pH data. The main goal of the present work is to recover A_T and C_T data of A06 and A07 using GLODAP database combining with CARINA database and the most contemporary cruise MOC²Equatorial 2010. Thus, A_T data of A06 and A07 will be renewed using directly these data in a particular application of Multiple Linear Regression: the 3-D moving window MLR estimation method. Moreover, C_T data will be recalculated using the C_TA_T ratio together with the obtained results from the crossovers analysis method. In order to demonstrate the quality of the recovered A_T and C_T, the new pH has been calculated, showing the good agreement in terms of pH obtained between A06 and A07 related to MOC². To sum up, the entire carbon databases of A06 and A07 were checked and recovered.