greenhouse effect are considered. The results of studying the
absorption spectra of methane, nitrous oxides, sulphuric gas, ammonia,
nitric-acid vapours and other components are discussed. The assessments
of their contribution to the greenhouse effect are given. The important
role of the small-size fraction of the atmospheric aerosols as a factor
of the greenhouse effect is discussed. Both the analysis of the causes
of the Earth’s climate variability and the relevant investigation of
the atmospheric greenhouse effect determine the expediency of analysing
the conditions of the greenhouse effect formation on other planets.
Laboratory studies of the IR absorption spectra of synthetic CO/sub 2/
atmospheres were carried out.
discussed.;
Major Descriptors:
Some results from these studies are
*EARTH ATMOSPHERE
--
GREENHOUSE
PROJECT;
* GREENHOUSE
PROJECT
Descriptors: AEROSOLS; CLIMATES; OPTICAL PROPERTIES; PLANETARY ATMOSPHERES;
POLLUTION; SPECTRA
Broader Terms: ATMOSPHERES; COLLOIDS; DISPERSIONS; EXPLOSIONS; NUCLEAR
EXPLOSIONS; PHYSICAL PROPERTIES; SOLS
Subject Categories: 640107*
-- Astrophysics & Cosmology -- Planetary
Phenomena
INIS Subject Categories: Al5*
-- Astrophysics & Cosmology, Cosmic
Radiation
10/5/723
00982824
Author(s):
{Item 423 from file:
EDB-82-157681
Schell,
W.R.;
Nevissi,
103)
A.;
Meyers,
J.M.
Title: Biogeochemistry of transuranic elements in Bikini Atoll lagoon.
Final report
Corporate
Source:
Washington Univ.,
Ecology
Publication Date: Nov 1978
Report Number(s):
Order Number:
Seattle
of Radiation
p 222
RLO-2225-T18-22
(DOE):
AT06-76EV70018
Note: Portions of document are illegible
Decument Type: Report
Language: English
Journal Announcement: ERA8210
Availability: NTIS MF AQl.
input).
Lab.
DE82021989
Contract Number
Subfile:
(USA).
ERA
(Energy Research Abstracts);
NTS
(NTIS);
INS
(US Atomindex
Country of Origin: United States
Country of Publication:
Abstract:
United States
The distribution of transuranic and other radionuclides
in the
marine environment at Bikini Atoll was studied to better understand the
biogeochemical cycling of radionuclides produced during testing of some
23 nuclear and thermonuclear devices between 1946 and 1958. The
radionuclides are primarily associated with the coralline sediments.
However, the highest radionuclide concentrations are not found at the
out of the craters in the reef by the currents and deposited
downstream. The transuranic elements are distributed widely in
sediments over the northwest quadrant of the atoll suggesting that this
area serves as a settling basin for particles. The transuranic elements
associated with these sediment particles do not remain fixed but are
remobilized and distributed asymmetrically in the water column
throughout the lagoon. The physico-chemical states of plutonium,
measured using dialysis and sorption techniques include approx. 15%
colloidal and varying amounts in the soluble and particulate fractions
depending on sample location. Uptake of these physicochemical states is
extensive on plankton with distribution coefficients measured at Bikini
between water and plankton of 10/sup 4/ - 10/sup 6/. The uptake of
plutonium in higher organisms decreases with trophic level and low
concentrations
(approx.
.001 pCi/g for /sup 239/ /sup 240/Pu)
are found
in the edible muscle of fish. The half-time for cleansing the reef of
contaminant radionuclides has been estimated near the Bravo Crater
9003917
detonation craters but with the fine particles which have been washed