- README for Near Surface Temperature data - Raw data during 28 Oct.- 4 Nov. 2006: exp1028_1104raw.csv subjectively quality-controlled data: exp1028_1104subj.csv grided values of the subjectively quality-controlled data: exp1028_1104subj_grid.dat temporally interpolated values of the above grid data : exp1028_1104subj_interp.dat objectively quality-controlled data: exp1028_1104obj.csv grided values of the objectively quality-controlled data: exp1028_1104obj_grid.dat temporally interpolated values of the above grid data : exp1028_1104obj_interp.dat Raw data during 4 - 11 Nov. 2006: exp1104_1111raw.csv subjectively quality-controlled data: exp1104_1111subj.csv grided values of the subjectively quality-controlled data: exp1104_1111subj_grid.dat temporally interpolated values of the above grid data : exp1104_1111subj_interp.dat objectively quality-controlled data: exp1104_1111obj.csv grided values of the objectively quality-controlled data: exp1104_1111obj_grid.dat temporally interpolated values of the above grid data : exp1104_1111obj_interp.dat * Thermometer (T1, T4): MDS-Mk5/T manufactured by Alec Electronics Co., Ltd. * Thermometer (T2, T3): HOBO Stainless Temperature Logger U12-015 manifactured by Onset computer * Depth gauge: MDS-Mk5/D manufactured by Alec Electronics Co., Ltd. (1) exp1028_1104raw.csv, exp1104_1111raw.csv Raw data, 1-minute sampling First column: Date (UT) Second column: Time (UT) Third column: Water temperature T1 (deg.C) Fourth column: Water temperature T2 (deg.F) <- Notice! Fifth column: Water temperature T3 (deg.F) <- Notice! Sixth column: Water temperature T4 (deg.C) Seventh column: Depth of a depth gauge (m) * The nominal depthes of the thermometers and the depth gauge are as given below: T1: 150cm depth T2: 190cm depth T3: 240cm depth T4: 276cm depth in exp1028_1104, 286cm depth in exp1104_1111 Depth gauge: 286cm depth in exp1028_1104, 275cm depth in exp1104_1111 (2) exp1028_1104subj.csv, exp1104_1111subj.csv Error data, which was believed to have been obtained when the thermometer was above the sea surface, were subjectively detected by eyes, and replaced with -9.99 by Dr. Kawai. First column: Date (UT) Second column: Time (UT) Third column: Water temperature T1' (deg.C) Fourth column: Water temperature T2' (deg.C) Fifth column: Water temperature T3' (deg.C) Sixth column: Water temperature T4' (deg.C) Seventh column: Depth of a depth gauge (m) * The temperatures were corrected by the following formulas based on a calibration done before the observation: T1' = 0.999215 x T1 + 0.053264 T2' = 0.997487 x T2 + 0.028932 T3' = 0.998755 x T3 + 0.017783 T4' = 0.998654 x T4 + 0.063122 (3) exp1028_1104obj.csv, exp1104_1111obj.csv Error data, which was believed to have been obtained when the thermometer was above the sea surface, were objectively detected with the following conditions: * If any of T1'~T4' was lower than 28 deg.C, all of T1'~T4' were rejected. * If any of T1'~T3' was lower than T4' by more than 0.1 K, all of T1'~T4' were rejected. * If the depth of the depth gauge was less than 0.2 m, all of T1'~T4' were rejected. First column: Date (UT) Second column: Time (UT) Third column: Water temperature T1' (deg.C) Fourth column: Water temperature T2' (deg.C) Fifth column: Water temperature T3' (deg.C) Sixth column: Water temperature T4' (deg.C) Seventh column: Depth of a depth gauge (m) * The temperatures were corrected by the above formulas. (4) exp1028_1104subj_grid.dat, exp1104_1111subj_grid.dat, exp1028_1104obj_grid.dat, exp1104_1111obj_grid.dat The quality-controlled data of (2) or (3) were averaged in a bin of every 30 minutes and 0.5 m in depth. First column: Day (UT) * Year and month were omitted. Second column: Hour (UT) Third column: Minute (UT) Fourth column: 0-0.5m depth averaged temperature (deg.C) Fifth column: 0.5-1.0m depth averaged temperature (deg.C) Sixth column: 1.0-1.5m depth averaged temperature (deg.C) Seventh column: 1.5-2.0m depth averaged temperature (deg.C) Eighth column: 2.0-2.5m depth averaged temperature (deg.C) Ninth column: 2.5-3.0m depth averaged temperature (deg.C) Tenth column: 3.0-3.5m depth averaged temperature (deg.C) Eleventh column: 3.5-4.0m depth averaged temperature (deg.C) [Procedure] * The depth of each thermometer was estimated by the following formula: (estimated depth) = (nominal depth) x (depth measured with the depth gauge) / (nominal depth of the depth gauge) * A five-minute running mean of the depth gauge data were used as "depth measured with the depth gauge". * If the estimated depth of the thermometer was 0.2 m or less, this temperature was not used. * The temperature data were averaged in each bin of 30 minutes and 0.5 m in depth. The center of the temporal width was the hour, and half past the hour. The width was +-15 minutes from the center. (5) exp1028_1104subj_interp.dat, exp1104_1111subj_interp.dat, exp1028_1104obj_interp.dat, exp1104_1111obj_interp.dat The data-missing grids of (4) were temporally interpolated (linear). First column: Day (UT) * Year and month were omitted. Second column: Hour (UT) Third column: Minute (UT) Fourth column: 0-0.5m depth averaged temperature (deg.C) * No interpolation Fifth column: 0.5-1.0m depth averaged temperature (deg.C) Sixth column: 1.0-1.5m depth averaged temperature (deg.C) Seventh column: 1.5-2.0m depth averaged temperature (deg.C) Eighth column: 2.0-2.5m depth averaged temperature (deg.C) Ninth column: 2.5-3.0m depth averaged temperature (deg.C) Tenth column: 3.0-3.5m depth averaged temperature (deg.C) Eleventh column: 3.5-4.0m depth averaged temperature (deg.C) * No interpolation See also figures in Near_surface_obs.pdf Yoshimi KAWAI 12 Dec. 2006