نتایج جستجو برای: stratospheric ozone
تعداد نتایج: 24237 فیلتر نتایج به سال:
We present a simple method to perform degradation correction to Global Ozone Monitoring Experiment (GOME) reflectance spectra by comparing the average reflectance for 60 N–60 S with that at the beginning of GOME observations (July–December 1995) after removing the dependences on solar zenith angle and seasonal variation. The results indicate positive biases of up to ∼15–25% in the wavelength ra...
[1] In this paper we present the validation results of the operational vertical ozone profiles retrieved from the nadir observations by the Ozone Monitoring Instrument (OMI) aboard the NASA Earth Observing System (EOS) Aura platform. The operational ozone profile retrieval algorithm was developed at the Royal Netherlands Meteorological Institute and the OMI mission data has been processed and m...
The Weyerhaeuser Corporation is a large forest products company operating private bare-root nurseries in the United States and British Columbia, Canada (Littke 1994a). Due to concerns over the continued availability of methyl bromide for tree seedling production, Weyerhaeuser formulated a strategy to identify and investigate potential alternatives to methyl bromide including alternatives that r...
The ozone layer in the stratosphere absorbs a large part of the harmful UV-radiation coming from the sun. In the natural situation ozone is continuously being formed and destroyed. However, a number of man-made chemicals that contain fluorine, bromine and chlorine groups, called Ozone Depleting Substances (ODS), can greatly increase the rate of destruction, leading to a reduction in the thickne...
Injecting sulfate aerosol into the stratosphere, the most frequently analyzed proposal for solar geoengineering, may reduce some climate risks, but it would also entail new risks, including ozone loss and heating of the lower tropical stratosphere, which, in turn, would increase water vapor concentration causing additional ozone loss and surface warming. We propose a method for stratospheric ae...
[1] Two closely related chemical transport models (CTMs) employing the same highresolution meteorological data ( 180 km 180 km 600 m) from the European Centre for Medium-Range Weather Forecasts are used to simulate the ozone total column and tropospheric distribution over the western Pacific region that was explored by the NASA Transport and Chemical Evolution over the Pacific (TRACE-P) measure...
Observations of the ozone profile by a groundbased microwave radiometer in Switzerland indicate a dominant 20-day oscillation in stratospheric ozone, possibly related to oscillations of the polar vortex edge during winter. For further understanding of the nature of the 20-day oscillation, the ozone data set of ERA Interim meteorological reanalysis is analyzed at the latitude belt of 47.5 N and ...
7 Observations show an increase in maximum precipitation extremes and a decrease in 8 maximum temperature extremes over southeastern South America (SESA) in the second 9 half of the 20th century. The Community Earth System Model (CESM) Large Ensemble 10 (LE) experiments are able to successfully reproduce the observed trends of extreme precip11 itation and temperature over SESA. Careful analysis...
Using recently measured rates for isotopic variants of the ozone formation reaction , we derive expressions for the enrichment of symmetric and asymmetric and in stratospheric ozone and calculate total enrichments of 123‰ and 107‰ for and , respectively. We compare the calculations with measurements made with the Smithsonian Astrophysical Observatory far-infrared spectrometer during seven ballo...
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