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Gridded historical MSLP products: existing and future plans Tara Ansell Hadley Centre, Met Office, UK WMO AOPC /OOPC Surface Pressure Working Group Met.

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Presentation on theme: "Gridded historical MSLP products: existing and future plans Tara Ansell Hadley Centre, Met Office, UK WMO AOPC /OOPC Surface Pressure Working Group Met."— Presentation transcript:

1 Gridded historical MSLP products: existing and future plans Tara Ansell Hadley Centre, Met Office, UK WMO AOPC /OOPC Surface Pressure Working Group Met Office, Exeter, October 2005

2 Page 2© Crown copyright 2004 New MSLP gridded products : EMSLP EMSLP : North Atlantic – Europe daily product Blend of 86 stations + marine obs from 1850-2003 5x5 degree resolution available from www.cru.uea.ac.uk/cru/projects/emulate and www.hadobs.org see Ansell et al, J. Climate (accepted)

3 Page 3© Crown copyright 2004 EMSLP problems:  Smoothing /damping  marine gridding system (effects number of observations)  RSOI  Greenland  Variance problems  RSOI  Correction to 24 hour  Daily rather than synoptic fields

4 Page 4© Crown copyright 2004 Grid pt vs. station data (daily data) Paris

5 Page 5© Crown copyright 2004 Grid point vs Station data (monthly analysis) NAO

6 Page 6© Crown copyright 2004 New MSLP gridded products : HadSLP2 HadSLP2: Global, monthly product (update of HadSLP1) Blend of 1502 stations + marine obs from 1850-2004 5x5 degree resolution updated in near real time with NCEP/NCAR reanalyses See Allan and Ansell, J. Climate (submitted)

7 Page 7© Crown copyright 2004 HadSLP problems:  Southern Hemisphere mid-latitudes  Interpolate or not south of 60 o S?  Required by the user??  Things to work on:  Error estimates  EOFs (Use of NCEP data + obs)

8 Page 8© Crown copyright 2004 HadSLP2p coverage

9 Page 9© Crown copyright 2004 Northern Hemisphere daily product Potential to achieve similar coverage with daily data

10 Page 10© Crown copyright 2004 Digitised European sources to include  Swiss daily data (not included in EMSLP)  Requires homogenisation  UK 3-hourly MSLP observations  Work in progress (L. Alexander)  Paris / London?  Extend beyond 1881

11 Page 11© Crown copyright 2004 Dataset index for Northern Hemisphere historical daily MSLP compilation – CDC 100 year Historical Reanalysis Name Description Period of Record ICOADSGlobal Marine1784-2002 ICOADS add onsKobe, Japanese Whaling, Russian RV 1889-1940, 1946-1984, 1937-1991 Integrated Surface Hourly Global Land1901-2005 CDMP WBAN 1001US Land1892-1948 CDMP SAOUS Land1928-1948 Russian EmpireRussian Land1849-2000 NCEP/NCAR BUFRGlobal UA and Surface1948-2005 USSRRussian Land (3 hourly)1935-1986 WASANorthern Europe + Greenland1871-1996 EMULATENorth Atlantic-Europe1850-2004 Environment CanadaCanadian Land1842-2005 Hong KongHong Kong Observatory1885-1939 Batavia/JakartaRoyal Dutch Observatory1866-1944

12 Page 12© Crown copyright 2004 Known and/or potential daily MSLP data sources to be tapped – inside and outside of Europe (I) China (Beijing, Shanghai, Hong Kong, Macao) – Nicolas Central Physical Observatory 1850-1912; Hong Kong Government Gazette 1861-1941; Shanghai, Inspectorate General of Customs, 1877-1905; China Coast Meteorological Register 1885-1912; Direccao dos Servicos Meteorologicos e Geofisicos, 1901-2000 Caribbean – Caribbean Meteorological Institute, ???? Greenland - Danish Meteorological Institute, 1870s-> Middle East, Egypt, Sudan, Mediterranean (eg. Cairo, Alexandria, Beirut, Khartoum, Malta, Trieste, Brindisi, Athens, Limassol) – Abbassia Observatory, 1900-1947; Survey Department, Cairo, 1907-1957; Zentralanstalt fur Meteorologie und Geodynamik, Year Books, 1854-1984

13 Page 13© Crown copyright 2004 Known and/or potential daily MSLP data sources to be tapped – inside and outside of Europe (II) French Colonial (North Africa, Caribbean, Middle East, SE Asia) - Bureau Central Meteorologique, Bulletin International, 1869-1881; Bureau Central Meteorologique, Annales, 1880-1913 Portuguese Colonial (North Atlantic Islands, Guinea, Goa) - Servico Meteorologico Nacional, Anais meteorologicas das colonias, 1915-1951 German Colonial (Labrador, North Africa, Iraq, Iran, Korea) - Deutsche Seewarte, Deutsche Ueberseeische Meteorologische Beobachtungen, 1883-1914 Northern Hemisphere - Washington, Signal Office, 1875-1883 Bermuda – Bermuda Weather Service, 1981-2000 DWR (Daily Weather Reports) – UK, French, Spanish, Algerian, Italian, Austro-Hungarian, Russian

14 Page 14© Crown copyright 2004 NH MSLP for March 1881 - International simultaneous meteorological observations, Washington, Signal Office Isobars in black, Isotherms in red

15 Page 15© Crown copyright 2004

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