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Gridded historical MSLP products: existing and future plans
Gridded historical MSLP products: existing and future plans
Tara Ansell Hadley Centre, Met Office, UK
WMO AOPC /OOPC Surface Pressure Working GroupMet Office, Exeter, October 2005
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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)
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EMSLP problems:
Smoothing /damping marine gridding system (effects number of
observations)RSOI
Greenland
Variance problemsRSOI
Correction to 24 hourDaily rather than synoptic fields
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Grid pt vs. station data (daily data)
Paris
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Grid point vs Station data (monthly analysis)
NAO
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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)
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HadSLP problems:
Southern Hemisphere mid-latitudes
Interpolate or not south of 60oS?Required by the user??
Things to work on: Error estimatesEOFs (Use of NCEP data + obs)
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HadSLP2p coverage
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Northern Hemisphere daily product
•Potential to achieve similar coverage with daily data
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Digitised European sources to include
Swiss daily data (not included in EMSLP)Requires homogenisation
UK 3-hourly MSLP observationsWork in progress (L. Alexander)
Paris / London? Extend beyond 1881
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Dataset index for Northern Hemisphere historical daily MSLP compilation – CDC 100 year Historical ReanalysisName Description Period of Record
ICOADS Global Marine 1784-2002
ICOADS add ons Kobe, Japanese Whaling, Russian RV
1889-1940, 1946-1984, 1937-1991
Integrated Surface Hourly
Global Land 1901-2005
CDMP WBAN 1001 US Land 1892-1948
CDMP SAO US Land 1928-1948
Russian Empire Russian Land 1849-2000
NCEP/NCAR BUFR Global UA and Surface 1948-2005
USSR Russian Land (3 hourly) 1935-1986
WASA Northern Europe + Greenland 1871-1996
EMULATE North Atlantic-Europe 1850-2004
Environment Canada Canadian Land 1842-2005
Hong Kong Hong Kong Observatory 1885-1939
Batavia/Jakarta Royal Dutch Observatory 1866-1944
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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
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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
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NH MSLP for March 1881 - International simultaneous meteorological observations, Washington, Signal Office
Isobars in black,Isotherms in red
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