Page 1© Crown copyright Report of the Global Collecting Centres Elanor Gowland, GCC UK SOT-IV, 16...
-
Upload
eric-miller -
Category
Documents
-
view
212 -
download
0
Transcript of Page 1© Crown copyright Report of the Global Collecting Centres Elanor Gowland, GCC UK SOT-IV, 16...
© Crown copyright Page 1
Report of the Global Collecting Centres
Elanor Gowland, GCC UK
SOT-IV, 16th - 21st April 2007
© Crown copyright Page 2
Overview
GCC - current
MCSS – need to change
Proposed changes to IMMT and MQCS
Task Teams to revise work
© Crown copyright Page 3
Current set-up
Under the current set-up of the Marine Climatological Summaries Scheme (MCSS) there are:
41 potential Contributing Members (CMs)
8 Responsible Members (RMs) with separate areas of responsibility for storage & provision of data
2 Global Collecting Centres (GCCs) to process submitted data to the WMO Minimum Quality Control Standards (MQCS) and distribute to RMs
© Crown copyright Page 4
Summary of 2006 annual report
2006 was the 13th year of GCC operations
Just under 1 million observations submitted from 16 Contributing Members
More than half the data received was from the last 2 years (2005 & 2006)
VOSClim contributions on the increase
IMMT-3 format is being used for nearly two thirds of observations
On land and duplicate data decreasing
© Crown copyright Page 5
Highlights & Issues – Responsible Members
• All RMs receive the global dataset via FTP
• This means there are potentially 8different versionsof the sameobservation that could be officiallyprovided
© Crown copyright Page 6
Highlights & Issues – Contributions
An ever increasing proportion of data is being submitted: in IMMT-3 format with flags, having been checked to MQCS with fewer duplicates with fewer on land positions with VOSClim elements (more later) from the recent past without invalid characters
with masked callsigns X
© Crown copyright Page 7
“SHIP” problem
Observations in Met Office marine archive with id like or equal to "SHIP"
0
500
1000
1500
2000
2500
3000
3500
4000
4500
01-2
003
03-2
003
05-2
003
07-2
003
09-2
003
11-2
003
01-2
004
03-2
004
05-2
004
07-2
004
09-2
004
11-2
004
01-2
005
03-2
005
05-2
005
07-2
005
09-2
005
11-2
005
01-2
006
03-2
006
05-2
006
07-2
006
09-2
006
11-2
006
01-2
007
Date (month & year)
Nu
mb
er
ob
se
rva
tio
ns
id like SHIP
id = SHIP
© Crown copyright Page 8
Highlights & Issues – VOSClim (1)
• 9 CMs are registered with VOSClim project, 5 submitted data in 2006
• Amount of data increasing (%age of total obs): 1% in 2003; 4% in 2004 and 2005, 9% in 2006 (distribution below)
© Crown copyright Page 9
Highlights & Issues – VOSClim (2)
• Not all VOSClim ships report the extra elements• Some un-registered ships are submitting VOSClim
elements2006 Countries Total
number of obs
Number ships registered
Number obs with VOSClim elements
Number obs with VOSClim elements
VOSClim registered Non VOSClim
1st quarter NL, FR, DE 15594 19 3453 2026
2nd quarter GB, DE, NL, IN 47116 78 38637 8
3rd quarter DE, IN, FR, NL 11767 36 2554 1223
4th quarter DE, GB 9536 50 8815 409
Total 5 84013 53159 3666
© Crown copyright Page 10
Highlights & Issues – GCCs
The MQCforCMs software package was updated for IMMT-3 and MQCS-V. It also gives the option of separating duplicate obs. Version 3 of the software has been distributed to 22 CMs, at their request.
The DWD have updated their GCC website www.dwd.de/gcc
The Met Office have created a GCC website www.metoffice.gov.uk/research/interproj/gcc/
© Crown copyright Page 11
Future plans for MCSS
The MCSS system was set up in 1963 and current process has been in place since 1993. It is time to modernise the data flow, so we can make use of the increase in IT capabilities, so globally better use can be made of the data we collect.
Consider:-
- Collection (electronic logbooks, BUFR / IMMT)
- Processing (MCQS, real-time and delayed-mode)
- Storage (higher QC, number of data centres)
- Access to data (using internet, single point of contact)
- Products produced (centrally / individual members)
© Crown copyright Page 12
IMMT
International Marine Meteorological Tape
&
MQCS
Minimum Quality Control Standards
© Crown copyright Page 13
Introduction
Since 1993 the Global Collecting Centres for marine climatological data have been responsible for the International Maritime Meteorological Tape (IMMT) and Minimum Quality Control Standards (MQCS) format and contents.
These have undergone a number of changes, most recently because of the VOS Climate project.
© Crown copyright Page 14
Changes to create IMMT-4 (1)
There have been some minor changes to the IMMT format to ensure syntax is correct: The code for wind direction has been corrected to lower case (“dd”) The versions of IMMT and MQCS have been updated in line with these suggested changes
Description of elements have been updated: Element 40, source of observation, revised to specifically refer to electronic logbook software Quality control indicator, flags 6 & 7 have been updated to reveal their use by GCCs
© Crown copyright Page 15
Changes to create IMMT-4 (2)
The reason for the change is mostly to tidy up the VOSClim elements and flags, whose set-up did not follow the same pattern as the standard VOS elements:
Elements 91 and 92 – the sign has been separated from the value of the “departure of reference level from actual sea level”
This has a knock on effect to subsequent VOSClim element numbers
The QC indicator for the sign of the “departure of reference level from actual sea level” has been removed – no other signs of values had a flag
© Crown copyright Page 16
Changes to create MQCS-VI
Checks on the range of values for some indicators added (cloud height and visibility - element 9; version of FM-13 code – element 64; version of IMMT format – element 65)
Increase in maximum height of deck cargo above summer maximum load line (element 90) to 35 metres
Flags on VOSClim elements (and not signs of values) updated to take into account re-numbering of VOSClim elements
© Crown copyright Page 17
Changes to IMMT code suggested at ETMC
Above recommendations from GCCs agreed Further, more radical, changes suggested including:
Fractional hour Wind speed to have better resolution Unique identifier Dew point recommendations Depth of SST Element 30 indicator for SST measurement, e.g. add
infrared, micro-wave, or indicate the wavelength. But the ETMC considered that this might be considered in the Pub47. For radiation thermometer, it is the height that needs to be considered.
Elements 7 and 8 (lat/lon): increase resolution Element 41; add identification for VOSClim ship
Task Team to pick up these issues plus links to IMMA format
© Crown copyright Page 18
Actions from ETMC
TT-DMVOS (Delayed Mode VOS)
TT-MOCS (Marine and Oceanographical Climate Summaries)
These groups will be tackling all the issues I’ve mentioned in this presentation plus more, so it is essential there is input from SOT and other teams to tackle these cross-cutting issues (coding formats, data availability, submissions of VOS / VOSClim, etc)
© Crown copyright Page 19
Questions?