February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 3, NUMBER 1, JANUARY 1990
"On the Relation between Atmospheric Ozone and Sunspot Number,"
J.K. Angell (Air Resour. Lab., ERL, NOAA, Silver Spring MD 20910), J. Clim.,
2(11), 1404-1416, Nov. 1989.
Between 1966 and 1985, there has been very good agreement between observed
global total ozone and global total ozone calculated from three 2-D
stratospheric models that take into account the solar cycle, the time variation
in trace gases, and nuclear tests. Both observed and calculated variations are
closely related to variation in sunspot number. The observed variation in global
total ozone, compared with the predicted variation from one of the models using
the sunspot maximum in 1990, is in good agreement through the northern summer of
1988, if the impact of the Quasi-Biennial Oscillation (QBO) on global total
ozone is taken into account.
"Annual Cycle and Long-Term Trends of Circulation and Climate
Variability over the Tropical Oceans," K. Wolter, S. Hastenrath (Dept.
Meteor., Univ. Wisconsin, 1225 W. Dayton St., Madison WI 53706), ibid.,
Investigated trends in data obtained from ship observations and land station
records for the period 1948-1983. Cluster analysis was used to reduce data
volume, while preserving the large-scale signal from the most coherent regions.
The following were among the trends observed: (1) increased prevalence of the
negative Southern Oscillation phase accompanied the increase of El Niño
occurrences, (2) a modulation of the annual cycle of circulation and rainfall
regime over the western equatorial Atlantic, (3) warming in the Indian Ocean,
and (4) seasonal influences in the Atlantic that aggravated the drought in
Correspondence on satellite data contamination related to sea surface
temperature trend analysis, Nature, 341(6244), 695, Oct. 26,
1989. (See also the following entry.)
"Biases in Satellite-Derived Sea-Surface-Temperature Data,"
R.W. Reynolds (Clim. Anal. Ctr., NMC/NWS/NOAA, Washington DC 20233), C.K.
Folland, D.E. Parker, ibid., 728-731.
Shows that no significant trend can be seen in three analyses of global sea
surface temperatures that are based on in situ data over the 6.5-year
period between January 1982 and June 1988, nor in an independent analysis of
sea-surface-temperature and land-air-temperature.
"Trend Analysis of Aerosol-Corrected Umkehr Ozone Profile Data
Through 1987," G.C. Reinsel (Dept. Stat., Univ. Wisconsin, Madison WI
53706), G.C. Tiao et al., J. Geophys. Res., 94(D13),
16,373-16,386, Nov. 20, 1989.
Considers trend analysis of stratospheric ozone profile data obtained from
10 stations. Results indicate an overall negative trend in Umkehr layers 7-9 for
the period 1977-1987 and a positive solar cycle association in layers 4-9. Shows
a substantial overall negative linear drift in solar backscattering ultraviolet
data relative to corrected Umkehr data in layers 7-9, with estimated values of
the drift of the order of -1.0% per year for layers 8 and 9.
"Temperature Trends at the South Pole and McMurdo Sound," K.E.
Trenberth (NCAR, POB 3000, Boulder CO 80307), J.G. Olson, J. Clim., 2(10),
1196-1206, Oct. 1989.
The persistence of temperature anomalies within each month shows that
regular observations, about every three days, are required to produce a reliable
climate record throughout the troposphere and lower stratosphere. Noticeable
downward trends in temperature were found near the time of greatest variability,
in late spring. This appears to be due to a delay in the spring warming
apparently brought about by the diminished solar heating due to low ozone
amounts associated with the ozone hole.
"Arctic Sea Ice 1973-1987: Seasonal, Regional, and Interannual
Variability," C.L. Parkinson (NASA, GSFC, Code 671, Greenbelt MD 20771),
D.J. Cavalieri, J. Geophys. Res., 94(C10), 14,499-14,523, Oct.
Analyzes sea ice extents using data derived from the Nimbus 5 electrically
scanning microwave radiometer and the Nimbus 7 scanning multichannel microwave
radiometer. The record as a whole gives no definitive indication from the
varying sea ice extents of any consistent warming or cooling of the north polar
region. The results are consistent with Hansen and Lebedeff's lack of a strong
temperature trend in that period as well.
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