Climatological Data for Clouds Over the Globe from Surface Observations, 1982-1991, (Total Cloud Edition) CDIAC NDP-026AEntry ID: CDIAC_NDP026A
Abstract: The dataset includes global coverage of analyzed cloud data obtained
from routine, surface synoptic weather reports from ships and land
stations over the entire globe, for the 10-year period from December
1981 through November 1991. It is similar to the NDP-026 dataset which
has data from 1930-1979 (see also NCAR DSS 292.0).
This Total Cloud Edition, contains ... various annual, seasonal, and
monthly averages of clear-sky, precipitation, and sky-obscured due to
fog. Data are in grid boxes that are 2.5 x 2.5 degree (lat x lon) for
land and 5 x 5 degree for ocean.
Data were obtained from surface synoptic weather reports obtained from
the National Meteorological Center (NMC) archives and from the
Comprehensive Ocean-Atmosphere Data Set (COADS). Day and nighttime
average are also given seperately for each season. Several derived
quantities, such as interannual variations and annual and diurnal
harmonics, are provided as well. This dataset incorporates an
improved representation of nighttime cloudiness by using only those
nighttime observations for which the illuminance due to moonlight
exceeds a specified threshold. This reduction in nighttime bias
increases the computed global average total cloud cover by about 2%.
All CDIAC numerical data packages include copies of pertinent literature
discussing the data, summaries discussing the background, source and scope of
the data, as well as applications limitations and restrictions of the data.
CDIAC has provided an anonymous FTP area to all data files, retrieval codes,
and descriptive files for the NDP's that are presently available. The FTP
address is ftp://cdiac.esd.ornl.gov or 18.104.22.168 and input your
email address as the password or link to http://cdiac.ornl.gov/ftp/ndp026a/
The NDP-026a data set is located in CDIAC's anonymous FTP in pub/ndp026a.
All files are compressed (UNIX) ASCII text files. All the data bases
provided in this area are fully documented and are also available on 9-track
magnetic tape, CD-ROM, or IBM-formatted, high or low-density floppy diskettes.
(Click for Interactive Map)
Start Date: 1981-12-01Stop Date: 1991-11-30
ISO Topic Category
Distribution Media: on-line (FTP)
Role: TECHNICAL CONTACT
Email: hahn at atmo.arizona.edu
Department of Atmospheric Sciences University of Arizona
Province or State: AZ
Postal Code: 85721-0081
Phone: (303) 492-8759
Fax: (303) 492-6946
Email: london at zodiac.colorado.edu
Department of Astrophysical Planetary and Atmospheric Sciences University of Colorado
Province or State: CO
Postal Code: 80309
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
Phone: (206) 543-7230
Email: sgw at atmos.washington.edu
Department of Atmospheric Sciences AK-40 University of Washington
Province or State: Washington
Postal Code: 98195
Hahn, C.J., S.G. Warren, and J. London, 1994. Submitted to J. Climate.
Hahn, C.J., S.G. Warren, J. London, R.M. Chervin, and R.L Jenne, 1982:
'Atlas of simultaneous occurrence of different cloud types over the ocean.'
NCAR Technical Note TN-201+STR, Boulder, Colorado. (NTIS no. PB83-152074)
Hahn, C.J., S.G. Warren, J. London, R.M. Chervin, and R.L. Jenne,
... 1984: 'Atlas of simultaneous occurrence of different cloud types over land.'
NCAR Technical Note TN-241+STR, Boulder, Colorado. (NTIS no. PB88-118641/AS)
Warren, S.G., C.J. Hahn, J. London, R.M. Chervin, and R.L. Jenne,
1986: 'Global distribution of total cloud cover and cloud type amounts
over land.' NCAR Technical Note TN-273+STR and DOE Technical Report No.
ER/60085-H1, U.S. Department of Energy, Carbon Dioxide Research Division,
Washington, D.C. (NTIS no. DE87-006903)
Creation and Review Dates
Last DIF Revision Date: 2009-04-20