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1.
M. V. Makarova G. A. Alekseenkov V. S. Kostsov A. V. Poberovskii 《Izvestiya Atmospheric and Oceanic Physics》2008,44(5):606-614
The influence of air invasions from the upper troposphere on the CO total column amount is studied on the basis of spectroscopic measurements of the CO total column amount, backward trajectories of air-mass motions (the HYSPLIT model), and meteorological data. It is shown that the observed invasions of substratospheric and upper-troposphere air masses determine the minimum CO total column amount in late January-late March. The invasion of air masses from the upper troposphere can result in a decrease in the CO total column amount to 30% (of its mean values). Using January 31, 2000, as an example, we show the influence of the invasion of Arctic air masses from the upper troposphere on the CO total column amount in the St. Petersburg region: the results of measurements of the CO total column amount in the St. Petersburg region and at the Kiruna polar station (NDACC) are in agreement to within 1% if the vertical transport of air masses is taken into account. Thus, for a correct combined analysis of measurement data on the CO total column amount for different observation stations, it is necessary to use data on air-mass trajectories. 相似文献
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3.
Timofeyev Yu. M. Nerobelov G. M. Poberovskii A. V. Filippov N. N. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(3):286-296
Izvestiya, Atmospheric and Oceanic Physics - Results obtained from ground-based high spectral resolution measurements of solar IR radiation absorption spectra are analyzed. These measurements have... 相似文献
4.
D. V. Ionov M. A. Kshevetskaya Yu. M. Timofeev A. V. Poberovskii 《Izvestiya Atmospheric and Oceanic Physics》2013,49(5):519-529
Atmospheric NO2 content data obtained from regular ground-based measurements of solar IR radiation in the St. Petersburg region using a spectrometer with a high spectral resolution are analyzed. The absorption spectra of the NO2 multiplet in the vicinity of ~2915 cm?1 allow one to obtain data on variations in the stratospheric total content of NO2 in 2009–2011. The accuracy of these data is estimated from their comparison with data obtained from independent ground-based and satellite measurements. The parameters of the seasonal cycle of the stratospheric content of NO2 are estimated. The body of data accumulated during these measurements in the IR region made it possible to isolate the component of a daytime photochemical increase in the stratospheric content of NO2 and estimate its rate. 相似文献
5.
M. V. Makarova V. S. Kostsov A. V. Poberovskii 《Izvestiya Atmospheric and Oceanic Physics》2007,43(4):497-504
Results of spectroscopic measurements of the carbon dioxide total column amount near St. Petersburg during forest fires in the period from August to September 2002 are analyzed. The HYSPLIT model is used to calculate air-mass trajectories and CO distribution on a mesoscale in this period. The HYSPLIT model simulations and measurements of carbon dioxide total column amount yield an estimate of the specific intensity of CO emission in a Pskov forest fire on August 28–September 8, 2002, equal to 0.17–0.26 kg m2. This estimate can be used for an estimation of the integral CO emission from fires in northwestern Russian forests and for model simulations of atmospheric CO concentration fields. The estimate of the CO emission from forest fires that is obtained from ground-based measurements can also be made on the basis of satellite measurements if they contain information on CO in the lower tropospheric layers (0 to 2 km). 相似文献
6.
Kulikov Yu. Yu. Poberovskii A. V. Ryskin V. G. Yushkov V. A. 《Geomagnetism and Aeronomy》2020,60(2):254-262
Geomagnetism and Aeronomy - The results of microwave radiometry studies of the ozone-content dynamics in the middle atmosphere above Peterhof during stratospheric warmings of two winters,... 相似文献
7.
M. V. Makarova A. V. Poberovskii K. N. Visheratin A. V. Polyakov 《Izvestiya Atmospheric and Oceanic Physics》2009,45(6):723-730
The results of measuring the methane content in the entire atmospheric thickness over the St. Petersburg region are given
for 1991–2007. It is shown that, within this period, the mean annual cycle of the total methane content is characterized by
its maximum values in December–January and its minimum values in June–August when the annual-cycle amplitude amounts to ∼3.6%.
In this case, the annual variations in the total methane content may differ significantly from the mean annual cycle obtained
in some years. A statistically significant linear trend of the total CH4 content has not been revealed for 1991–2007. The obtained values of the linear-trend index have opposite signs in the winter
and summer months (positive for January 0.6 ± 0.2%/year and February 0.4 ± 0.2%/year and negative for July 0.3 ± 0.2%/year
and August 0.2 ± 0.1%/year). This fact suggests the tendency for an increase in the amplitude of the annual cycle of the total
CH4 content. The results of a spectral analysis of a series of data on the total CH4 content show that, for 1991–2007, the following harmonics are pronounced with a confidence of 95%: 12 months (annual harmonic),
32 months (quasi-biennial oscillations), and 55 months (4.5 years), which are also pronounced in the series of meteorological
parameters and total ozone content. 相似文献
8.
A. V. Polyakov Yu. M. Timofeev A. V. Poberovskii I. S. Yagovkina 《Izvestiya Atmospheric and Oceanic Physics》2011,47(6):760-765
The results of ground-based measurements of the total content (TC) of hydrogen fluoride in the atmosphere in Peterhof near St. Petersburg for one year (from April 2009 through April 2010) using a Bruker IFS125 Fourier spectrometer with a high spectral resolution (0.005 cm?1) are presented. The well-known computer code SFIT2 (Zephyr-2) was used for the radiation data inversion. Random measurement errors were 1–5% and the systematic error was 5–10%. The seasonal trend of the HF TC in Peterhof is characterized by a minimum in summer and a maximum in winter through early spring and is very close to the seasonal HF TC trend obtained at the Harestua Network for the Detection of Atmospheric Composition Change (NDACC) station located at about the same latitude. A comparison of the St. Petersburg State University (SPbSU) ground-based measurements with the data of satellite HF TC measurements (with an ACE-FTS instrument) showed a good quantitative agreement of the results for the entire period of observations. According to our ground-based measurements and the satellite measurements with the ACE-FTS instrument, the mean values of the HF TC and its rms variations during the period under investigation are 1.77 × 1015 and 1.80 × 1015 cm?2 (difference 1.5%) and 21 and 18%, respectively. 相似文献
9.
S. G. Semakin A. V. Poberovskii Yu. M. Timofeev 《Izvestiya Atmospheric and Oceanic Physics》2013,49(3):294-297
The results of the first ground-based spectroscopic measurements in Russia of the total content (TC) of nitric acid in the atmosphere near St. Petersburg over the period April 2009–October 2011 are presented. These measurements show a substantial seasonal trend of the HNO3 TC with maximal values in the winter period and early in the spring and minimal values in the summer time. The seasonal trends and variations in the daily mean values of HNO3 TC near St. Petersburg in the winter and spring periods agree well with observations at the Kiruna station of the international NDACC network. 相似文献
10.
Ya. A. Virolainen Yu. M. Timofeyev A. V. Polyakov D. V. Ionov O. Kirner A. V. Poberovskii H. Kh. Imhasin 《Izvestiya Atmospheric and Oceanic Physics》2016,52(1):57-65
Chemistry climate models of the gas composition of the atmosphere make it possible to simulate both space and time variations in atmospheric trace-gas components (TGCs) and predict their changes. Both verification and improvement of such models on the basis of a comparison with experimental data are of great importance. Data obtained from the 2009–2012 ground-based spectrometric measurements of the total contents (TCs) of a number of TGCs (ozone, HNO3, HCl, and NO2) in the atmosphere over the St. Petersburg region (Petergof station, St. Petersburg State University) have been compared to analogous EMAC model data. Both daily and monthly means of their TCs for this period have been analyzed in detail. The seasonal dependences of the TCs of the gases under study are shown to be adequately reproduced by the EMAC model. At the same time, a number of disagreements (including systematic ones) have been revealed between model and measurement data. Thus, for example, the EMAC model underestimates the TCs of NO2, HCl, and HNO3, when compared to measurement data, on average, by 14, 22, and 35%, respectively. However, the TC of ozone is overestimated by the EMAC model (on average, by 12%) when compared to measurement data. In order to reveal the reasons for such disagreements between simulated and measured data on the TCs of TGCs, it is necessary to continue studies on comparisons of the contents of TGCs in different atmospheric layers. 相似文献