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  • Chinese Argo National Data Management Report (ADMT-16, 2015)
  • Author:China Argo Real-time Data Center   Source:Argo  Pubtime:2016-01-06 14:20:40   Hit:
  • ChineseArgo National Data Management Report

    ADMT-16  Bermuda, 4-6 November 2015

          1. Status

          Data acquired from floats

          From November 2014 to September 2015, China acquired Argo profiles from 214 active floats including 107 active Argo equivalent floats. These floats were deployed by 7 PIs from 5 institutes in China. Among these floats, there are 119 PROVOR (including 17 PROVORDOI), 87 APEX (including 20 Iridium floats and one O2Iridium float), 8 ARVOR floats. This September China also deployed 5 HM-2000 profiling floats (developed by China) in the northwestern Pacific ocean which use GPS for positioning and BeiDou for data transmission. CSIO has setup a BeiDou data receiving system through which the messages from HM-2000 floats can be operationally received and decoded. At present, the data from HM-2000 floats are QCed and converted into format V3.1 (only profile files). The profile files haven't been submitted to GDAC because we have to wait the acceptance from ADMT.

          Data issued to GTS

          CurrentlyCLS still helps us distribute Argo profiles on GTS. This year we prepared BUFR message using perl script developed by JMA. But it took a lot of time for China Meteorological Administration (CMA) to add BUFR bulletin headers. Now they are ready to send BUFR data to GTS. By the end of this year, CSIO will send BUFR data to GTS operationally through CMA.

          Data issued to GDACs after real-time QC

          From the last ADMT, China submitted 8,118 R-files to GDACs after real-time QC. Among these profiles, 3,239 profiles are observed by Argo equivalent floats, and 1,965 O2profiles are obtained from 18 O2floats.

    This year CSIO changed all the decoders from C language to Matlab, as well as RTQC and netcdf file generation. New decoders are very flexible due to usage of format table. We only need to create a new format table if a float with a new firmware version is deployed. This year we updated our netcdf file generation software to version 3.1. Using this software, we updated most of the meta files and technical files, and V3.1 profile files are routinely submitted to GDAC. We also created b-files from several bio-Argo floats except 17 PROVOR-DOI floats. As for trajectory file, we still use old format.

          NMIDS finished converting profile files from old version to version 3.1, but not for meta, technical and trajectory files.

          Delayed data sent to GDACs

          Owing to the format changes, NMDIS is updating their software to meet the new format. None D-files are submitted to GDAC this year, and the delays will be relieved next year. This year CSIO have completed the software upgrade, and most D-files will be transferred to version 3.1. The new D-files will be submitted to GDAC as soon as possible.

          Web pages

          Two web pages are maintained by NMDIS, and CSIO. the China Argo Data Centre (http://www.argo.gov.cn) and the China Argo Real-time Data Centre (http://www.argo.org.cn). Both web pages provide the access to the float data, meta data, trajectory and their related plots. A new Argo web inquiry system has been built by CSIO (http://101.71.255.4:8090/flexArgo/out/argo.html), which will provide global Argo data inquiry and downloading services to users.

          Statistics of Argo data usage ( operational models, scientific applications, number of National Pis… )

          The Argo data have been widely used in scientific applications and operational oceanography. Several Argo products and reanalysis products have been developed shown as the following table.

       

          NMDIS carried out a duplicate removing for global Argo dataset. The principle is identifying key items that could represent the information of observations ,such as time , latitude and longitude, instrument , and profile data, auxiliary items (e.g. country, responsible agency, and project name), then setting a replicate criterion for each key item and sorting the data based on key items.  If observation times, latitudes and longitudes, instruments are all the same, the suspicious profiles will be checked to eliminate duplicates. Preliminary results show that about 1‰ of profiles are found to be duplicated.

         

          2. Delayed Mode QC

          This year CSIO completed the DMQC software upgrade. The updated software covers pressure correction,thermal mass correction andsalinity correction (based on the OW method). We have finished the DMQC for about 50 inactive floats (about 6000 profiles), and will submit all updated D-files to GDAC as soon as possible.


          3. GDAC Functions

          (If your centre operates a GDAC, report the progress made on the following tasks and if not yet complete, estimate when you expect them to be complete

          None.

     

          4. Regional Centre Functions

          None.

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