Browsing UMBC Joint Center for Earth Systems Technology (JCET) by Issue Date
Now showing items 1-20 of 1195
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Topside Ionosphere of Venus and its Interaction with the Solar Wind
(Nature, 1970-02-07)THE abrupt termination of the daytime ionosphere of Venus at about 500 km observed with the Mariner V two-frequency occultation experiment provides an extremely interesting picture of the direct interaction of the solar ... -
Photolysis rates based on Schumann-Runge band approximations and irradiance measurements
(AGU, 1985-10)The photolysis rate (J₃) for CF₂Cℓ₂, (F-12) in the stratosphere has been computed for three altitudes using measured solar fluxes from a balloon borne spectrometer. The rate is compared with that obtained by computing the ... -
Infrared spectroscopy of the lower stratosphere with a balloon-borne cryogenic Fourier spectrometer
(Optica, 1987)The IR limb emission of the lower stratosphere has been measured using a balloon-borne liquid nitrogen-cooled Michelson interferometer with liquid helium-cooled Si:Ga detectors. Portions of the thermal emission spectrum ... -
Measurement of nighttime stratospheric N₂O₅ from infrared emission spectra
(AGU, 1988-10)The mixing ratio profile of N₂O₅ has been inferred from high-resolution emission spectra obtained with a balloon-borne Fourier spectrometer (SIRIS). The observations were taken for the period from midnight to predawn on ... -
Total Ozone trends deduced from Nimbus 7 Toms data
(AGU, 1991-06)The Total Ozone Mapping Spectrometer (TOMS) on the Nimbus 7 satellite has been measuring the total column amount of ozone over the globe for more than 11 years. Recent improvements in the data analysis have led to a technique ... -
Abrupt increase in Greenland snow accumulation at the end of the Younger Dryas event
(Nature, 1993-04-08)THE warming at the end of the last glaciation was characterized by a series of abrupt returns to glacial climate, the best-known of which is the Younger Dryas event1. Despite much study of the causes of this event and the ... -
Effect of Mount Pinatubo aerosols on total ozone measurements from backscatter ultraviolet (BUV) experiments
(AGU, 1993-10-20)Error introduced by Mount Pinatubo aerosols in total ozone derived by the backscatter ultraviolet (BUV) technique is described. BUV instruments include the total ozone mapping spectrometer (TOMS) instrument flying on Nimbus ... -
Meteor-3/TOMS observations of the 1994 ozone hole
(AGU, 1995-12-01)The development of the 1994 springtime (September–November) Antarctic ozone hole was observed by the Meteor-3/TOMS (Total Ozone Mapping Spectrometer) to result in a very low minimum ozone value, 90±5 DU (Dobson Units) on ... -
Detection of biomass burning smoke from TOMS measurements
(AGU, 1996-04-01)A 14.5 year gridded data set of tropospheric absorbing aerosol index was derived from the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS) reflectivity difference between 340 and 380 nm channels. Based upon radiative ... -
Composite Temperature Record from the Greenland Summit, 1987–1994: Synthesis of Multiple Automatic Weather Station Records and SSM/I Brightness Temperatures
(AMS, 1996-06-01)Air temperature (Tᴀ) records from automatic weather stations (AWS) in central Greenland and associated Special Sensor Microwave/Imager (SSM/I) brightness temperature (Tʙ) data (37 GHz, vertical polarization) have been used ... -
Postselection-free energy-time entanglement
(American Physical Society (APS), 1996-07-01)We report a two-photon interference experiment that realizes a postselection-free test of Bell's inequality based on energy-time entanglement. In contrast with all previous experiments of this type, the employed entangled ... -
UV-B increases (1979–1992) from decreases in total ozone
(AGU, 1996-08-01)Increases in ultraviolet fluxes (300 nm to 340 nm) reaching the ground between 1979 and 1992 are estimated using measured stratospheric ozone amounts and reflectivity data from Nimbus-7/TOMS (Total Ozone Mapping Spectrometer). ... -
Can Two-Photon Interference be Considered the Interference of Two Photons?
(American Physical Society (APS), 1996-09-02)We report on a “postponed compensation” experiment in which the observed two-photon entangled state interference cannot be pictured in terms of the overlap of the two individual photon wave packets of a parametric ... -
Absorption of solar radiation by clouds: Interpretations of satellite, surface, and aircraft measurements
(AGU, 1996-10-01)To investigate the absorption of shortwave radiation by clouds, we have collocated satellite and surface measurements of shortwave radiation at several locations. Considerable effort has been directed toward understanding ... -
Long-term ozone trends derived from the 16-year combined Nimbus 7/Meteor 3 TOMS Version 7 record
(AGU, 1996-12-15)Ozone measurements from the Nimbus 7 TOMS instrument, which operated from November 1978 through early May 1993, have been extended through December 1994 using data from the TOMS instrument on-board the Russian Meteor 3 ... -
Electromagnetic fields generated by a three dimensional global ocean circulation
(Wiley, 1997-03-15)A simplified form of the motional induction equation is used to calculate the dominant three-dimensional (3-D) electromagnetic (EM) fields generated by a specified steady 3-D global ocean circulation. The EM calculations ...