DOE Data Explorer title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Climatological Data For Clouds Over the Globe From Surface Observations, 1982-1991: The Total Cloud Edition (1994) (NDP-026a)

Abstract

Routine, synoptic surface weather reports from ships and land stations over the entire globe, for the 10-year period December 1981 through November 1991, were processed for total cloud cover and the frequencies of occurrence of clear sky, sky-obscured due to precipitation, and sky-obscured due to fog. Archived data, consisting of various annual, seasonal and monthly averages, are provided in grid boxes that are typically 2.5° — 2.5° for land and 5° — 5° for ocean. Day and nighttime averages are also given separately for each season. Several derived quantities, such as interannual variations and annual and diurnal harmonics, are provided as well. This data set incorporates an improved representation of nighttime cloudiness by utilizing only those nighttime observations for which the illuminance due to moonlight exceeds a specified threshold. This reduction in the night-detection bias increases the computed global average total cloud cover by about 2%. The impact on computed diurnal cycles is even greater, particularly over the oceans where it is found (in contrast to previous surface-based climatologies), that cloudiness is often greater at night than during the day.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/ndp026a.html

Authors:
; ;
  1. University of Colorado , Cooperative Institute for Research in Environmental Sciences
  2. University of Washington, Department of Atmospheric Sciences
  3. University of Colorado, Department of Astrophysical, Planetary and Atmospheric Sciences
Publication Date:
Other Number(s):
osti:1394926; doi:10.3334/CDIAC/CLI.NDP026A; cdiac:doi 10.3334/CDIAC/cli.ndp026a
Research Org.:
Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)
Sponsoring Org.:
U.S. DOE > Office of Science (SC) > Biological and Environmental Research (BER) (SC-23)
Subject:
54 ENVIRONMENTAL SCIENCES
Keywords:
Occurrence of Sky-Obscured due to Fog; Occurrence of Sky-Obscured due to Precipitation; Occurrence of Clear Sky; Total Cloud Cover; NDP-026A; amp; amt; avg; box; clat; clon; fmt; fq; frl; iav; idn; imoon; lo; lob; mgrp; nbxs; nlsta; nobs; nsn; nt; nyrs; phase; sd; size; sn; span; time; trnd; type; unc; vaf; year
Geolocation:
87.5,-10.0|-88.75,-10.0|-88.75,0.0|87.5,0.0|87.5,-10.0
OSTI Identifier:
1394926
DOI:
https://doi.org/10.3334/CDIAC/CLI.NDP026A
Project Location:


Citation Formats

Hahn, C. J., Warren, S. G., and London, J. Climatological Data For Clouds Over the Globe From Surface Observations, 1982-1991: The Total Cloud Edition (1994) (NDP-026a). United States: N. p., 1994. Web. doi:10.3334/CDIAC/CLI.NDP026A.
Hahn, C. J., Warren, S. G., & London, J. Climatological Data For Clouds Over the Globe From Surface Observations, 1982-1991: The Total Cloud Edition (1994) (NDP-026a). United States. doi:https://doi.org/10.3334/CDIAC/CLI.NDP026A
Hahn, C. J., Warren, S. G., and London, J. 1994. "Climatological Data For Clouds Over the Globe From Surface Observations, 1982-1991: The Total Cloud Edition (1994) (NDP-026a)". United States. doi:https://doi.org/10.3334/CDIAC/CLI.NDP026A. https://www.osti.gov/servlets/purl/1394926. Pub date:Sat Oct 01 00:00:00 EDT 1994
@article{osti_1394926,
title = {Climatological Data For Clouds Over the Globe From Surface Observations, 1982-1991: The Total Cloud Edition (1994) (NDP-026a)},
author = {Hahn, C. J. and Warren, S. G. and London, J.},
abstractNote = {Routine, synoptic surface weather reports from ships and land stations over the entire globe, for the 10-year period December 1981 through November 1991, were processed for total cloud cover and the frequencies of occurrence of clear sky, sky-obscured due to precipitation, and sky-obscured due to fog. Archived data, consisting of various annual, seasonal and monthly averages, are provided in grid boxes that are typically 2.5° — 2.5° for land and 5° — 5° for ocean. Day and nighttime averages are also given separately for each season. Several derived quantities, such as interannual variations and annual and diurnal harmonics, are provided as well. This data set incorporates an improved representation of nighttime cloudiness by utilizing only those nighttime observations for which the illuminance due to moonlight exceeds a specified threshold. This reduction in the night-detection bias increases the computed global average total cloud cover by about 2%. The impact on computed diurnal cycles is even greater, particularly over the oceans where it is found (in contrast to previous surface-based climatologies), that cloudiness is often greater at night than during the day.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/ndp026a.html},
doi = {10.3334/CDIAC/CLI.NDP026A},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {10}
}