U.S. Surface Archives Sent to China (1997-2000)

7th PRC-U.S. Joint Coordination Panel for Data and Information Cooperation

29 Nov. – 1 Dec, 2000

Steven Worley National Center for Atmospheric

Research

• Cooperative data exchange– SOA/NMDIS/CNODC, China– NCDC and NCAR, U.S.

• Agreement signed, April-May, 1998

• Obligations– CNODC, digitize U.S. Marine

Meteorological Collection, 1879-1893

– NCAR, send a global land surface data, 1967-March 1997

• Chronology of Events– Early 1997 datasets were

identified• Mr. Joe Elms, NCDC

• Mr. Guo Fengyi, NMDIS/CNODC

– June 1997, a test tape was sent to China – successful

– December 1997, sent all 1967-March 1997 data to China

• 70 Gigabytes on 17 magnetic tapes

• A few problems with Chinese importation customs

• Same as data used for NCEP/NCAR Global Atmospheric Reanalysis V.1

Global Land Surface Stations

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

Years

Num

ber

of S

tatio

ns

• Other data sent to China– Supplemental land surface data

April 1997 – 1998– COADS, 1950-1997, newest

version, sent January 2000

• U.S. has provided our very best global surface data, land and ocean, to China

• Candidate datasets for future exchanges– From US

• New edition of COADS, 1784-1949– In data processing stages now

• New COADS analyzed products, for full period of record

– In the development stages now

• Global Atmospheric Reanalyses– NCEP Version I, 1948-2000

– NCEP Version II, New, 1979-2000, approx. 105 Gigabytes for standard atmospheric levels and surface flux fields.

– More about our holdings• Various NOAA sites

• NCAR Data Support Section

http://dss.ucar.edu/

Global Upper Air Stations

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400

600

800

1000

1200

1400

1600

1800

2000

1949 1953 1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997

Year

Nu

mb

er

of

Sta

tio

ns

all

china

– Possible data from China • 1949-1956 Upper Air sounding

– Significant improvement for Reanalyses computations

• Marine surface observations NOT already in COADS

– Existing digital archives

– Other digitization projects

• Ocean profile stations NOT already included in the World Ocean Database (Levitus et al.)

• Fix buoy data NOT already in the global collections

Based on yesterday’s presentation, much of this information is coming to NODC. We can access the data through NODC