Jesse Enloe and Shawn R. Smith
World Ocean Circulation Experiment
Surface Meteorological Data Assembly Center
Center for Ocean Atmospheric Prediction Studies
Florida State University
May 11, 2001
Report WOCEMET 99-05
Version 2.0
Addendum
Members of the WOCE Hydrographic Project Office (WHPO) and WOCEMET met at the 13th Data Products Committee (DPC) meeting in College Station, TX to discuss reconciliation of the WOCE cruise line designators. This was done in anticipation of the future release of version 3 of the WOCE global data set, and resulted in changes to several WOCE cruise line designations.
On May 11, 2001 WOCEMET removed the WOCE designation for the cruise P__02/06. The quality control information for this data set has been left in this report for the user, but please note that the line previously known as P__02/06 is NOT a WOCE cruise line.
The dates for the cruise P__02/06 have been updated from 01/20/94-02/02/94 to 10/15/94-10/22/94. Please note that the dates for the cruise P__02/06 are now 10/15/94-10/22/94.
Introduction:
This report summarizes the quality of surface meteorological data collected by the Bosei Maru (identifier: JGAW) bridge crew during one WOCE cruise. The data were provided to the Florida State University Data Assembly Center (DAC) in electronic format by M. Fukasawa at Tokai University, Japan and were converted to standard DAC netCDF format. The data were then processed using an automated screening program, which adds quality control flags to the data, highlighting potential problems. Finally, the Data Quality Evaluator (DQE) reviews the data and current flags. Flags are then added, modified, and deleted according to the judgement of the DQE and other DAC personnel. An in depth description of the WOCE quality control procedures can be found in Smith et al. (1996). The data quality control report summarizes all flags for the Bosei Maru bridge observations and explains reasons why these flags were assigned.
Statistical Information:
The Bosei Maru WOCE cruise data are expected
to include observations taken every hour. Values for the following variables
were collected:
| Time | (TIME) |
| Latitude | (LAT) |
| Longitude | (LON) |
| Earth Relative Wind Direction | (DIR) |
| Earth Relative Wind Speed | (SPD) |
| Sea Temperature | (TS) |
| Sea Temperature by Thermo-salinometer | (TS2) |
| Atmospheric Pressure | (P) |
| Air Temperature at 5 m | (T) |
| Air Temperature at 12 m | (T2) |
| Relative Humidity at 5 m | (RH) |
| Relative Humidity at 12 m | (RH2) |
Details for the cruise are listed in Table 1 and
include cruise dates, number of records, number of values, number of flags,
and total percentage of data flagged. A total of 2,028 values are evaluated
with 36 flags added by the preprocessor and the DQE resulting in a total
of 1.78% of the values being flagged.
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Summary:
The bridge data for the Bosei Maru, except
for the platform positioning data, are of excellent quality. The distribution
of flags for each variable is detailed in Table 2.
Table 2: Number of Flags and Percentage Flagged for Each Variable
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TIME LAT LON DIR SPD TS TS2 P T T2 RH RH2 |
18 18
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0 18 18 0 0 0 0 0 0 0 0 0 |
0.00 10.65 10.65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 |
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The only problem was the large number of F flags the preprocessor applied to the latitude and longitude, representing unrealistic movement by the vessel determined from the platform positioning data. Otherwise, the DQE did not have to add any additional flags.
References:
Smith, S.R., C. Harvey, and D.M. Legler, 1996: Handbook
of Quality Control Procedures
and Methods for Surface Meteorology
Data. WOCE Report No. 141/96, Report WOCEMET
96-1, Center State for Ocean-Atmospheric
Prediction Studies Florida State University,
Tallahassee FL 32306-2840