# Presentation: 719240

## Pressure Data in theInternational COADS (iCOADS)

- <date/time>

- Pressure Data in theInternational COADS (iCOADS)

- Scott Woodruff (NOAA/CDC)

- AOPC/SLP WG meeting
- Norwich, UK
- 20-21 November 2002

- iCOADS 2.0  COADS background
- Data composition--future data enhancements
- SLP data quality + metadata issues

## International Comprehensive Ocean-Atmosphere Data Set (iCOADS)

- <date/time>

*International* Comprehensive Ocean-Atmosphere Data Set (iCOADS)

- COADS: project since 1981: NOAA + NCAR
- 1985: Release 1 (1854-1979) (ships and buoys)
- 1993-2001: partial releases  Release 2.0 (155M)
- 2002: I-COADS agreed: Boulder *Workshop on the Use of Historical Marine Climate Data*
- Open and unrestricted data distribution

## Release 2.0 (dark blue) vs. Release 1 (light blue) reports/yearFuture blend candidates: red (undigitized), yellow (partly), green (fully)

- <date/time>

- Release 2.0 (dark blue) vs. Release 1 (light blue) reports/yearFuture blend candidates: red (undigitized), yellow (partly), green (fully)

## Mixture of ship/other data: 1950-97

- <date/time>

## Japanese Whaling Ships(30K reports)

- Japanese Whaling Ships(30K reports)

## U.S. Marine Meteorological Journals(1.8 M reports)

- U.S. Marine Meteorological Journals(1.8 M reports)

## National Composition: Release 1c

## SST:Release 1 (left)Release 2.0 (right)Obs/2 box/decade:grey	1-9red	10-99orange	100-399yellow	400-

- _SST:_Release 1 (left)Release 2.0 (right)Obs/2 box/decade:grey	1-9red	10-99orange	100-399yellow	400-

## SLP:Release 1 (left) Release 2.0 (right)

- _SLP:_Release 1 (left) Release 2.0 (right)

## Wind speed:Release 1 (left) Release 2.0 (right)

- _Wind speed:_Release 1 (left) Release 2.0 (right)

## iCOADS SLP:Data Quality + Metadata Issues

- <date/time>

- iCOADS SLP:Data Quality + Metadata Issues

- Ship-buoy data homogeneity, metadata?
- Dutch deck 193 (gravity adj.)
- HSST undetected dups + biases
- Barometer corrections + reporting practices?
- New data additions: correction uncertainties:
- Norwegian (1867-89)?
- Japanese Kobe (1890-1932)?
- US Maury Collection (1784-1863): Todd Mitchell
- Large negative anomalies: 1850s

## Maury Collection (line) and SLP Bias Flags:2 = gravity   1 = temp + gravity   (Todd Mitchell)

- <date/time>

- Maury Collection (line) and SLP Bias Flags:2 = gravity   1 = temp + gravity   (Todd Mitchell)

## “ERSLP” (Smith and Reynolds 2002)SLP Quality Control

- Number of annual 2-degree super observations: the green line is the total
- number and  the red dashed line is the number after quality control.

## “ERSLP” (Recon) Spatial Correlations

- Spatial correlations (between 60S-60N) between the reconstruction and
- the Met Office analysis (GMSLP2), the Kaplan et al. (2000) analysis (KEA)
- and the reanalysis of Kalnay et al. (1996, Renal).

## Second WMO Workshop on Advances in Marine Climatology17-22 Nov. 2003, Brussels

- <date/time>

- Second WMO Workshop on Advances in Marine Climatology17-22 Nov. 2003, Brussels

- 	Follow-up: CLIMAR99, Vancouver, 8-15 Sep. 1999
- 	Receive appropriate input: WMO Guide to the Applications of Marine Climatology (WMO--No. 781)
- 	Review the requirements of users: marine products, climate information, iCOADS
- 	Guidance and technical support: national MS/MCSS
- 	Celebrate 150th Anniversary: 1854 Brussels Conference