Zobrazeno 1 - 10
of 58
pro vyhledávání: '"James B. Kerr"'
Publikováno v:
2017 89th ARFTG Microwave Measurement Conference (ARFTG).
Fast spectrum analysis in FFT mode is simultaneously performed with a modern VNA at the input and output ports of a DUT. The stimulus signal is a wideband repetitive multi-tone. The Spectrum Analyzer coherent mode of the VNA takes into account the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::221e9018ab01f104a22ec33e0b555f12
https://doi.org/10.1109/arftg.2017.8000824
https://doi.org/10.1109/arftg.2017.8000824
Autor:
Vitali Fioletov, James B. Kerr
Publikováno v:
Atmosphere-Ocean. 46:159-184
One of the main concerns regarding a decrease in stratospheric ozone is the consequential increasein the amount of ultraviolet (UV) radiation that reaches the lower atmosphere and the Earth's surface. Radiationat UV wavelengths where ozone absorbs st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5aeeca64b665d0a671b1ae7ba314271f
https://doi.org/10.3137/ao.460108
https://doi.org/10.3137/ao.460108
Autor:
William R. Burrows, Laurence J. Wilson, Marcel Vallée, D. I. Wardle, David W. Tarasick, James B. Kerr
Publikováno v:
Meteorological Applications. 1:247-265
In the spring of 1992 Environment Canada started daily forecasts of ultraviolet-B radiation reaching the ground for locations in Canada. The forecast quantity is a ‘UV Index’ based on an empirical formula relating UV flux at the ground to solar z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b19348955c8bdd381cc4d22dd5e4b1c
https://doi.org/10.1002/met.5060010307
https://doi.org/10.1002/met.5060010307
Autor:
D. I. Wardle, Chris A. McLinden, David W. Tarasick, L.J.B. McArthur, Vitali Fioletov, James B. Kerr
Publikováno v:
Atmosphere-Ocean. 41:121-138
An improved understanding of the global ultraviolet (UV) climate has recently become of great interest. A number of stations are now making regular measurements of spectrally‐resolved UV‐B irradiance. Despite the lack of long‐term records, it i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b593810327e6a27e8cca5cb1a7ef4b0
https://doi.org/10.3137/ao.410202
https://doi.org/10.3137/ao.410202
Publikováno v:
Scopus-Elsevier
Hourly UV index values at 45 sites in Canada were estimated using a statistical relationship between UV irradiance and global solar radiation, total ozone, and dewpoint temperature. The estimation method also takes into account the enhancement of UV
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ce4daef818222535f5e1f04512f43be
https://doi.org/10.1175/1520-0450(2003)042<0417:euicoc>2.0.co
https://doi.org/10.1175/1520-0450(2003)042<0417:euicoc>2.0.co
Publikováno v:
Scopus-Elsevier
In recent years, estimates of UV radiation at the Earth's surface have been obtained from satellite retrievals. These retrievals have been compared with ground-based measurements at a few sites, but so far there have been few comparisons from unpollu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ebcfd9edf7e00a8a73ccc3779fc582b
https://doi.org/10.1029/2001jd000545
https://doi.org/10.1029/2001jd000545
Autor:
Elizabeth C. Weatherhead, Gregory C. Reinsel, George C. Tiao, Charles H. Jackman, Lane Bishop, Stacey M. Hollandsworth Frith, John DeLuisi, Teddie Keller, Samuel J. Oltmans, Eric L. Fleming, Donald J. Wuebbles, James B. Kerr, Alvin J. Miller, Jay Herman, Richard McPeters, Ronald M. Nagatani, John E. Frederick
Publikováno v:
Journal of Geophysical Research: Atmospheres. 105:22201-22210
International agreements for the limitation of ozone-depleting substances have already resulted in decreases in concentrations of some of these chemicals in the troposphere. Full compliance and understanding of all factors contributing to ozone deple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::332769deb1d7e4ca7467514cc43d593c
https://doi.org/10.1029/2000jd900063
https://doi.org/10.1029/2000jd900063
Publikováno v:
Journal of Geophysical Research: Atmospheres. 104:30139-30151
Two statistical models have been developed from 6 years of simultaneous measurements of global radiation by pyranometers, UV-A by a Brewer spectrophotometer and from total ozone, dew point temperature and snow cover data at Toronto. The models estima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2110ef653f3bf409e6877125a7a2fc1f
https://doi.org/10.1029/1999jd900808
https://doi.org/10.1029/1999jd900808
Publikováno v:
Journal of Geophysical Research: Atmospheres. 104:1737-1747
Total ozone data available from the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) have been compared with Version 7 of the Nimbus 7 (for the 1978-1993 period) and Meteor 3 total ozone mapping spectrometer (TOMS) data sets (for the 1991-19
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5471f1007e6848caf7479fdb7ba5b64
https://doi.org/10.1029/1998jd100046
https://doi.org/10.1029/1998jd100046
Autor:
Elizabeth C. Weatherhead, Gregory C. Reinsel, George C. Tiao, Xiao-Li Meng, Dongseok Choi, Wai-Kwong Cheang, Teddie Keller, John DeLuisi, Donald J. Wuebbles, James B. Kerr, Alvin J. Miller, Samuel J. Oltmans, John E. Frederick
Publikováno v:
Journal of Geophysical Research: Atmospheres. 103:17149-17161
Detection of long-term, linear trends is affected by a number of factors, including the size of trend to be detected, the time span of available data, and the magnitude of variability and autocorrelation of the noise in the data. The number of years
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c259c8dcb1e52655a156ba527730ef9
https://doi.org/10.1029/98jd00995
https://doi.org/10.1029/98jd00995