Results 241 to 250 of about 7,074,149 (271)

Validation of gome total ozone column with the assimilation model KNMI

Advances in Space Research, 1998
The two-dimensional global Assimilation Model KNMI (AMK) is used to validate GOME total ozone columns. A method is developed to derive an upper limit on the intrinsic (random) uncertainty in the GOME ozone values which makes use of the information carried in the model by a reliability flag.
Piters, A.J.M., Levelt, P.F., Allaart, M.A.F., Kelder, H.M.   +3 more
openaire   +1 more source

Using neural network ensembles for the operational retrieval of ozone total columns

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
This paper presents the operational retrieval of ozone total columns from atmospheric spectrometers using an algorithm based on neural network ensembles. Single neural networks are trained to approximate subregions of a complex multidimensional function; the neural networks are then combined using the mixture-of-experts model.
G. Diego, R. Loyola
openaire   +3 more sources

Regional short-term forecast of total column ozone

Atmospheric Environment, 1995
Abstract An algorithm for predicting the regional distribution of total column ozone (Ω) is described. It is based on locally representative regressions between Ω, and temperature and geopotential at different standard levels of the preceding and/or the day considered.
G. Vogel, D. Spänkuch, E. Schulz, U. Feister, W. Döhler   +4 more
openaire   +1 more source

Multifractal Analysis of Global Total Column Ozone Image

AIP Conference Proceedings, 2009
Ozone depletion is an important contributor to global environmental change. Satellite remote sensing provides various kinds of ozone imagery every day. As an important natural property, we investigate multifractal characteristics of global total column ozone (GTCO) images and explore their change over time with a series of month‐average GTCO images ...
Mao-Gui Hu, Jin-Feng Wang, Theodore E. Simos, George Psihoyios, Ch. Tsitouras   +4 more
openaire   +1 more source

On short-term total-column-ozone-forecast errors

Atmospheric Environment, 1997
Abstract The accuracy of short-term predicted total-column ozone amount, Ω, is reported to be 10–12 DU or about 3–4%. This result was achieved by several authors independently using linear multiple regressions with different predictors. The operational procedure of the German Weather Service to predict Ω uses as predictors the ozone amount of the ...
D. Spänkuch, E. Schulz
openaire   +1 more source

Detecting variability changes in Arctic total ozone column

Journal of Atmospheric and Solar-Terrestrial Physics, 2006
To better assess inter-annual variance changes in ozone time series, we study and propose a statistical procedure based on recent advances in wavelet multi-resolution analysis. This approach, novel to the field of ozone analysis, has the advantages of detecting significant changes in variance and of characterizing the distribution of these changes ...
Borchi, François, Naveau, Philippe, Keckhut, Philippe, Hauchecorne, Alain   +3 more
openaire   +2 more sources

Diagnosing and forecasting total column ozone by statistical relations

Journal of Geophysical Research: Atmospheres, 1995
The need for forecasting the level of harmful UVB radiation has stimulated the search for strong and reliable relations between total column ozone and suitable meteorological parameters. It is shown that daily total column ozone can be predicted regionally in midlatitudes with an uncertainty of about 15 Dobson units (DU; 1 DU = 2.69 × 10−16 molecules ...
openaire   +1 more source

Table Mountain Ozone Intercomparison: Brewer Ozone Spectrophotometer Total Column Measurements

Optical Remote Sensing of the Atmosphere, 1990
The Canadian Atmospheric Environment Service (AES) operated a Brewer ozone spectrophotometer during the Stratospheric Ozone Intercomparison Campaign (STOIC) at Table Mountain Observatory from July 19 to August 2, 1989. Direct sun measurements of total column ozone and measurements of the ozone profile using the umkehr technique were made throughout the
J.B. Kerr, C.T. McElroy
openaire   +1 more source

Retrieval of Total Column Ozone From Imagers Onboard Geostationary Satellites

IEEE Transactions on Geoscience and Remote Sensing, 2008
Geostationary imagers such as the Advanced Baseline Imager (ABI) proposed for the next generation of Geostationary Operational Environmental Satellites (GOESs), i.e., GOES Series R and beyond, and the spinning enhanced visible and InfraRed Imager (SEVIRI) onboard METEOSAT 8 provide atmospheric total column ozone (TCO) with high temporal (better than 15
Xin Jin, Jun Li 0026, Christopher C. Schmidt, Timothy J. Schmit, Jinlong Li   +4 more
openaire   +2 more sources

Total Column Ozone Retrieval From the Infrared Measurements of a Geostationary Imager

IEEE Transactions on Geoscience and Remote Sensing, 2019
A new algorithm has been developed to retrieve total column ozone (TOZ) from the infrared measurements of a geostationary satellite imager such as the Advanced Himawari Imager (AHI) aboard Himawari-8 and the advanced meteorological imager flying with the second generation geostationary satellite of South Korea.
Su Jeong Lee, Myoung Hwan Ahn, Seungmin Ha   +2 more
openaire   +2 more sources