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The Marine Climatological Summaries Scheme (MCSS) & the Expert Team on Marine Climatology (ETMC ). Two underlying questions…. Scott Woodruff and Elizabeth Kent NOAA Earth System Research Laboratory National Oceanography Centre, Southampton. SOT-IV Geneva, 16-21 April 2007.
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The Marine Climatological Summaries Scheme (MCSS)& the Expert Team on Marine Climatology (ETMC) Two underlying questions… Scott Woodruff and Elizabeth Kent NOAA Earth System Research Laboratory National Oceanography Centre, Southampton SOT-IV Geneva, 16-21 April 2007
Q1: Role of DM VOS data? • Often-overlooked benefits by VOS to GCOS for Essential Climate Variables • Complex issues largely impact GTS flow: • RT provision of metadata (META-T) • Call sign masking • WIS and BUFR/CREX • Possible more divergent approach for future: • RT/GTS data more for NWP • DM data more for climate-quality products
Q2: Role of ICOADS?International Comprehensive Ocean-Atmosphere Data Set • Current period of record: 1784-2005 • VOS data (and metadata) plus: • Drifting and moored buoys • Near-surface oceanographic profile “SST” • Proposed enhanced/new linkages to JCOMM • International Maritime Meteorological Archive (IMMA) format • Internationalization of some tasks?
ETMC Background • Major past focus: MCSS (c. 1964) -- components: • Delayed-mode VOS data management (IMMT, MQCS, etc.) • MCSS Summaries (MCS): tabular/graphical summaries • ETMC-II: 26-27 March -- selected recommendations: • SOT TT on eLogbooks [rev. here at SOT] • Documentation for calculations of DPT/etc. • Importance of AWS reports plus visual obs. • Concerns about impacts of ship ID masking • ID should not be masked in DM data
2 New Task Teams (TT) • Delayed-Mode VOS (TT-DMVOS) data mgmt. • Established by DMCG, cross-cutting with OPA/SOT • Reinvent data flow (GCCs, IMMT, MQCS) • Explore convergences/streamlining • Marine and Oceanographic Climatological Summaries (TT-MOCS) • Proposed by ETMC-II • Resolve future of the MCS
MCS Decadal SummariesMandated by Manual/Guide to Marine Met. Servicesproduced irregularly/not by some RMs AT (nobs, mean, SD) 1991-2000
TT-MOCS • WG to draft TOR (August 2007) • Cross-cutting with SPA (ETWS and ETSI) • JCOMM-II (2005): Urged ETMC to examine how marine, oceanographic, and ice climatologies could be “coordinated so as to been seen as an integrated product.” • QC linkages (MQCS, satellite data for in situ) • Related: Scoping document on ship QC • Tasked by DMCG-II (2006) • Commonalities: VOS, GOSUD, SAMOS
TT-DMVOS • Major task areas: • Streamline data flow -- including GCCs • Manage and update IMMT and MQCS • Explore possible convergences: • IMMT and IMMA formats • IMMA includes features suggested for IMMT-IV • E.g.: Higher-res. of lat/lon and wind speed • ICOADS (note: IMMT data not blended >1997) • Delayed-mode vs. GTS • GOSUD,SAMOS
Structure & Reporting • Proposed membership • ETMC: GCCs as two Co-chairpersons • Plus RMs on ETMC, etc. • SOT (its Chair + VOSPanel Chair) • US NOAA/NCDC member also planned • Reporting mechanisms • Project plan for next 3 years (Aug. 2007) • Reporting to ETMC and SOT + website
IMMA format:Key Format Design Requirements • Simplicity: Members process/manipulate • Use ASCII and eliminate complex encodings • e.g., numeric mixed with “+”, “/” • Flexibility & extensibility (e.g., historical) • Abbreviated (“core”) record type useful • BUFR physical format not appropriate • Consider convergence w/ BUFR tables
ICOADS recent data/metadata mixDelayed-mode (DM) v. RT GTS data in IMMA > GTS drifter reports consolidated in DM WMO Pub. 47 1973- (upcoming: 1955-72)
IMMA record types core (core + optional attms…) core icoads immt meta Key for archival: attm of complete original (suppl.) data: core . . . suppl. Experience has demonstrated that format translations frequently: • contain small (or large) errors • or are incomplete
E.g.: NCEP wind speed, 2006BUFR vs. FM 13 grey: BUFR - kts / 1.9425 (NCEP, GEMPAK) blue: BUFR - kts / 1.943844 (ICOADS, Int. Nautical Mile)
BUFR: Requirements for marine climatology (from ETMC-II) • Need for certified en- and de-coders (action, CBS) • Access to the originally reported data is critical: • NCEP practice: attach FM 13 (FM 18) to BUFR • non-SI units required for consistency • wind speed in kts and cloud cover in oktas • Establish unique “tracking” identifiers for VOS reports • BUFR reports need to be more carefully validated • General requirements first; detailed templates later? • JCOMM -- CBS interaction on this sooner vs. later?
CLIMAR-III JCOMM Workshop on Advances in Marine Climatology 6-9 May 2008, Gdansk/Sopot/Gdynia, Poland Local and Scientific Organizing Committees: initiated Updating: ‘Dynamic Part’ of the Guide to the Appl. MC Broadened JCOMM involvement: from OPA & SPA Possible new sessions: climate indices, sea state + ice