Now showing items 231-240 of 269
Historical trends of airborne trace metals in Detroit from 1971 to 1992
(Kluwer Academic Publishers; Springer Science+Business Media, 1996-03)
Ambient concentrations of particulate Fe, Zn, Ph, Ni, Cr, Cd and Hg were measured at nine sites located in the metropolitan area of Detroit from 1971 to 1992. The ambient concentrations of all the trace metals were found ...
Water Production Rates in Comet P/Halley from IUE Observations of HI Lyman-[beta]
(Elsevier, 1993-10)
During the 1985-1986 apparition of Comet P/Halley, the International Ultraviolet Explorer (IUE) satellite observed the comet using both the long-wavelength and short-wavelength spectrographs. The combination of a spherical ...
Photolysis of methane and the ionosphere of Uranus
(Elsevier, 1983-08)
Photochemical calculations for Uranus predict an extensive region of condensation of acetylene, ethane and methane in the vicinity of the temperature inversion layer. This could explain why ethane was not detected on Uranus, ...
Simultaneous optical observations of long-period gravity waves during AIDA '89
(Elsevier, 1993-03)
Ground-based optical instrumentation supported the AIDA '89 wind measurement comparisons by describing the gravity waves affecting the 80-100 km altitude region during clear dark hours over Puerto Rico. This study tabulates ...
Observations of neutral winds in the polar cap during northward IMF
(Elsevier, 1994-02)
Long term remote observations of neutral winds at F-region altitudes have been performed at Thule Air Base (lat. 76.5[deg]N, long. 69.0[deg]W), Greenland, and Sondre Stromfjord (lat. 67.0[deg]N, long. 50.9[deg]W), Greenland. ...
Modification of planetary atmospheres by material from the rings
(Elsevier, 1984)
The atmospheres and ionospheres of ringed planets can be, and perhaps are, modified by the injection of gaseous neutral and ionized species, and dust of ring origin. Although no direct evidence for such interaction exists, ...
Sources and losses of ring current ions: An update
(Elsevier, 1989)
The cleft ion fountain has been identified as a prodigious source of upflowing suprathermal ionospheric plasma. Modeling efforts have traced the path of these ions from the polar ionosphere along trajectories where the ...
Neutral upper atmospheres of the outer planets
(Elsevier, 1987)
Several recent papers have reviewed the upper atmospheres and ionospheres of Jupiter and Saturn in the post Voyager era (see, e.g., /1/ and references therein). Therefore, this paper will review only the most salient ...
Aerosol radiative forcing from the 2010 Eyjafjallajökull volcanic eruptions
(American Geophysical Union, 2014-08-06)
Although the 2010 volcanic eruptions of Eyjafjallajökull did not exert a large climate forcing, several features of their emissions favored weaker aerosol cooling or stronger warming than commonly attributed to volcanic ...
Complex coordinate methods for hydrodynamic instabilities and Sturm-Liouville eigenproblems with an interior singularity
(Elsevier, 1985-02)
Calculations of inviscid, linearized waves in fluids are very difficult when a mean wind or current U(y) is included because the differential equation is singular wherever U(y)=c, the phase speed. These "critical latitude," ...