نتایج جستجو برای: total ozone

تعداد نتایج: 818161  

Journal: :فیزیک زمین و فضا 0
زهرا شرعی پور کارشناس ارشد هواشناسی، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران عباسعلی علی اکبری بیدختی استاد، گروه فیزیک فضا، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

ozone is an important chemical constituent of the atmosphere, and stratosphere it protects the earth surface from harmful uv radiations, such that it is known as “good ozone” while, in the lower troposphere it is a highly oxidizing pollutant and known as “bad ozone”. it is also a greenhoure gas that can affect the climate. hence, the study of spatial and temporal variations of ozone is importan...

Journal: :فیزیک زمین و فضا 0
زهرا شرعی پور کارشناس هواشناسی، گروه فیزیک فضا، مؤسسه ژئوفیزیک، دانشگاه تهران

in this paper, the correlation between total ozone and upper air meteorological parameters such as heights of geopotential surfaces and temperatures for three stations of tehran, ankara and bet dagan located in the middle east, in cold period (jan, feb and march) of years of 2005, 2007 and 2008 has been investigated. data for upper air is taken from wyoming university and ozone data is from sat...

2005
J. P. Burrows

On the possible causes of recent increases in NH total ozone from a statistical analysis of satellite data from 1979 to 2003 S. Dhomse, M. Weber, I. Wohltmann, M. Rex, and J. P. Burrows Institute of Environmental Physics, University of Bremen, Bremen, Germany Alfred Wegener Institute, Potsdam, Germany Received: 9 August 2005 – Accepted: 4 October 2005 – Published: 9 November 2005 Correspondence...

2000
K. Eerme U. Veismann R. Koppel

The climatological characteristics of total ozone over Estonia based on the Total Ozone Mapping Spectrometer (TOMS) data are discussed. The mean annual cycle during 1979–2000 for the site at 58.3 N and 26.5 E is compiled. The available ground-level data interpolated before TOMS, have been used for trend detection. During the last two decades, the quasi-biennial oscillation (QBO) corrected syste...

Journal: :Annales Geophysicae 2002

2006
C. Vogler S. Brönnimann

The historical total ozone measurements taken with Dobson Spectrophotometer #8 at Longyearbyen, Svalbard, Norway, in the period 1950–1962 have been re-analyzed and homogenized based on the original measurement logs, using updated relevant parameters. In lack of sufficient calibration information, an empirical quality assessment 5 was performed, based on a climatological comparison with ozone me...

Journal: :فیزیک زمین و فضا 0
زهرا شرعی پور مجید مزرعه فراهانی

it has been proved that pollutant gases have a remarkable effect on the amount of total ozone measurements by the dobson instrument. among these gases so2 and no2 are the most influential pollutants on the ozone and have attracted the attention of scientists. in this study we make a general survey of the total ozone in the 4 year period, 2002-2005 measured in the institute of geophysics of the ...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
masoomeh bahreini mohammad bagher habibi najafi mohammad reza bassami iesa jahed

ozone is a strong oxidant and a potent disinfecting agent. there are numerous application areas of ozone in food industry. while there are many investigations on the application of ozone in food industry, relatively little information is available on the potential of ozone to reduce microbial populations in fresh-cut fruits and vegetables and the visual quality of lettuce. in this study, ozone ...

2007
Mark Weber Lok Nath Lamsal John P. Burrows

Currently three European satellite spectrometers, GOME1/ERS2 (1995-present), SCIAMACHY/ENVISAT (2002-present), and GOME2 (2006-present) provide a near global decadal data set of total ozone covering more than a decade. This data are very valuable for the detection of recovery in stratospheric ozone as expected from the levelling off of stratospheric chlorine. In order to detect such a signal be...

Journal: :Eos, Transactions American Geophysical Union 2014

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید