February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 2, NUMBER 9, SEPTEMBER 1989
"Atmospheric Carbon Dioxide at Mauna Loa Observatory--1. NOAA Global
Monitoring for Climatic Change Measurements with a Nondispersive Infrared
Analyzer, 1974-1985," W.D. Komhyr (ARL, R/E/AR4, NOAA, Boulder CO 80303),
T.B. Harris, L.S. Waterman, J. Geophys. Res., 94(D6), 8533-8547,
June 20, 1989.
Describes the measurement methodology, calibrations and data accuracy of
atmospheric CO2 measurements. The select NOAA GMCC monthly mean data are
compared with similar data obtained independently at Mauna Loa Observatory by
the Scripps Institution of Oceanography. The average difference of corresponding
monthly mean CO2 values for the two data sets is 0.15 + or - 0.18 ppm, where the
indicated variability is the standard deviation.
" . 2. Analysis of the NOAA GMCC Data, 1974-1985,"
K.W. Thoning (CIRES, Univ. Colorado, Boulder CO 80309), P.P. Tans, W.D. Komhyr,
Analyzes 12 years of continuous data, describing hourly and daily variations
in the CO2 concentrations due to local sources and sinks and selecting data
representative of background concentrations. A linear digital filter was applied
to the daily averages to extract seasonal cycles and long-term trends. Results
were compared to CO2 measurements taken at Kumukaji, Hawaii. Significant
differences in the amplitude and phase of the seasonal cycle were observed
"Increased Particle Flux to the Deep Ocean Related to Monsoons,"
R.R. Nair (Nat. Inst. Oceanog., Dona Paula, Goa-403004, India), V. Ittekkot et
al., Nature, 338(6218), 749-751, Apr. 27, 1989.
Assesses the impact of monsoon-driven processes on the downward particle
flux variations in the open ocean at three selected locations in the western,
central and eastern parts of the deep Arabian Sea. Particle flux at all three
sites showed strong seasonality. High primary productivity during the monsoons,
resulting from wind-induced mixed-layer deepening and the associated nutrient
injection to the euphotic zone, appeared to be the main factor controlling the
observed particle flux pattern. These findings may shed light on CO2 uptake
during glaciation when wind speeds were higher.
"Influence of Productivity Variations on Long-Term Atmospheric CO2,"
A.C. Mix (Coll. Oceanog., Oregon State Univ., Corvallis OR 97331), ibid.,
337(6207), 541-543, Feb. 9, 1989.
Uses data on planktonic foraminifera species in modern and ice-age Atlantic
sediments to assess spatial patterns of changes in productivity. Ice-age export
productivity was higher than at present by nearly 40% for the whole Atlantic,
and by 90% under the equator. These changes, if extrapolated to the global
ocean, support models in which a significant portion of CO2 changes are driven
by variations in biological productivity.
"Scavenging Pollutants from the Atmosphere," V.V. Alekseev,
A.O. Kokorin, S.I. Zaitsev, Soviet Meteor. Hydrol., No. 10, 42-48, 1988.
Discusses the elimination of CO2 and many heavy metals from the subcloud
layer of the atmosphere by precipitation and the influence this process has on
variations of the cycles of these substances in nature. Compares the results of
theoretical and laboratory experiments with existing experimental data.
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