Error analysis of integrated water vapor measured by СIMEL photometer     

I.?A.?Berezin  Yu.?M.?Timofeyev  Ya.?A.?VirolainenEmail author  I.?S.?Frantsuzova  K.?A.?Volkova  A.?V.?Poberovsky  B.?N.?Holben  A.?Smirnov  I.?Slutsker 《Izvestiya Atmospheric and Oceanic Physics》2017,53(1):58-64

Water vapor plays a key role in weather and climate forming, which leads to the need for continuous monitoring of its content in different parts of the Earth. Intercomparison and validation of different methods for integrated water vapor (IWV) measurements are essential for determining the real accuracies of these methods. CIMEL photometers measure IWV at hundreds of ground-based stations of the AERONET network. We analyze simultaneous IWV measurements performed by a CIMEL photometer, an RPG-HATPRO MW radiometer, and a FTIR Bruker 125-HR spectrometer at the Peterhof station of St. Petersburg State University. We show that the CIMEL photometer calibrated by the manufacturer significantly underestimates the IWV obtained by other devices. We may conclude from this intercomparison that it is necessary to perform an additional calibration of the CIMEL photometer, as well as a possible correction of the interpretation technique for CIMEL measurements at the Peterhof site.  相似文献   

Spatial–Temporal CO2 Variations near St. Petersburg Based on Satellite and Ground-Based Measurements     

Timofeyev  Yu. M.  Berezin  I. A.  Virolainen  Ya. A.  Makarova  M. V.  Polyakov  A. V.  Poberovsky  A. V.  Filippov  N. N.  Foka  S. Ch. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(1):59-64

Izvestiya, Atmospheric and Oceanic Physics - The results of studying spatial–temporal CO2 variations near St. Petersburg in 2014–2017 based on satellite measurements (OCO-2 satellite)...  相似文献   

Intercomparison of satellite and ground-based ozone total column measurements     

Ya. A. Virolainen  Yu. M. Timofeyev  A. V. Poberovsky 《Izvestiya Atmospheric and Oceanic Physics》2013,49(9):993-1001

Ozone total column (OTC) measurements made in 2009–2012 near St. Petersburg by a Fourier Transform Infrared (FTIR) spectrometer (Peterhof, St. Petersburg State University (SPbSU)), an M-124 filter ozonometer, and a Dobson spectrophotometer (Voeikovo, MGO), as well as measurements made by a spectrometer ozone monitoring instrument (OMI) (onboard the AURA satellite) have been analyzed and compared. Comparisons have been performed both between ensembles of ground-based measurement data, as well as between ground-based and satellite data. It has been shown that the standard deviation for all devices is 2.5–4.5%; here, the FTIR and Dobson instruments measuring the direct sun are in better agreement with OMI than the M-124 ozonometer measuring the zenith-scattered solar radiation as well. A seasonal cycle in discrepancy with amplitude of 1.5% has been detected between two series of OTC measurements made by M-124 and OMI instruments for a total of 850 days. In fall and winter, the ground-based measurements underestimate the OTC values in comparison with satellite data; in spring and summer, the situation is reversed: ground-based data overestimate the OTC values. Also, it has been revealed that FTIR measurements systematically overestimate the OTC values in comparison with other instruments: from 1.4% (for Dobson) to 3.4% (for OMI). Taking into account the spatial and temporal discrepancy of independent ensembles of measurements and an analysis of standard deviations between ground-based and satellite measurement data, the FTIR spectrometer (SPbSU) can be recommended for OTC satellite data validation.  相似文献   

Estimates of Trends of Climatically Important Atmospheric Gases Near St. Petersburg     

Timofeev  Yu. M.  Polyakov  A. V.  Virolainen  Ya. A.  Makarova  M. V.  Ionov  D. V.  Poberovsky  A. V.  Imhasin  H. H. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(1):79-84

Izvestiya, Atmospheric and Oceanic Physics - Total column amounts (TCAs) of various climatically important atmospheric gases have been determined in Peterhof for the period between 2009 and 2018....  相似文献   

MIRIAM — a space-borne sun occultation experiment for atmospheric trace gas spectroscopy     

R. Furrer  H. Rubin  M. Schaale  A. V. Poberovsky  A. V. Mironenkov  Y. M. Timofeyev 《GeoJournal》1994,32(1):17-27

The distribution of trace gases in earth's atmosphere will be analysed in a long term German-Russian space mission for more than three years, beginning in 1994. The FTIR-spectrometer, designed for this mission, has been tested with sun occultation measurements from the ground. The column contents of CH₄, CO₂, N₂O, CO, H₂, and O₃ could be retrieved. Spectral intervals for 25 different trace gases for the space mission have been identified and their retrieval accuracies were computed. The analysis shows, that with MIRIAM the lateral and vertical distribution of many trace gases can be analyzed as well as their long term variations.  相似文献   

HCl content has ceased to increase in the atmosphere of the Northern Hemisphere     

Yu. M. Timofeev  A. V. Polyakov  A. V. Poberovsky 《Doklady Earth Sciences》2016,470(1):994-996

According to the spectroscopy data on the HCl content analyzed in Peterhof in 2009–2016 and in a number of NDACC stations in the Northern Hemisphere, growth in the HCl content observed since 2007 and caused by changes in the stratospheric circulation stopped in 2010–2011. As follows from the experimental data, a decrease in the HCl content estimated in Peterhof at 4.4 × 10¹³ cm^–2/year or ~1.0%/year started again.  相似文献