Simultaneous radio and optical observations of the mid-latitude atmospheric response to a major geomagnetic storm of 6–8 April 2000     

E. L. Afraimovich  Ya. F. Ashkaliev  V. M. Aushev  A. B. Beletsky  V. V. Vodyannikov  L. A. Leonovich  O. S. Lesyuta  Yu. V. Lipko  A. V. Mikhalev  A. F. Yakovets 《Journal of Atmospheric and Solar》2002,64(18)

Basic properties of the mid-latitude traveling ionospheric disturbances (TIDs) during the maximum phase of a major magnetic storm of 6–8 April 2000 are shown. Total electron content (TEC) variations were studied by using data from GPS receivers located in Russia and Central Asia. The nightglow response to this storm at mesopause and termospheric altitudes was also measured by optical instruments FENIX located at the observatory of the Institute of Solar-Terrestrial Physics (51.9°N,103.0°E), and MORTI located at the observatory of the Institute of Ionosphere (43.2°N, 77.0°E). Observations of the O (557.7 and 630.0 nm) emissions originating from atmospheric layers centered at altitudes of 90 and 250 km were carried out at Irkutsk and of the O₂(b¹∑_g⁺−X³∑_g⁻) (0-1) emission originating from an atmospheric layer centered at altitude of 94 km was carried out at Almaty. Our radio and optical measurement network observed a storm-induced solitary large-scale wave with duration of 1 h and a wave front width of no less than 5000 km, while it traveled equatorward with a velocity of 200 m/s from 62°N to 38°N geographic latitude. The TEC disturbance, basically displaying an electron content depression in the maximum of the F2 region, reveals a good correlation with growing nightglow emission, the temporal shift between the TEC and emission variation maxima being different for different altitudes. A comparison of the auroral oval parameters with dynamic spectra of TEC variations and optical 630 nm emissions in the frequency range 0.4–4 mHz (250–2500 s periods) showed that as the auroral oval expands into mid-latitudes, also does the region with a developed medium-sale and small-scale TEC structure.  相似文献   

Automated search for star clusters in large multiband surveys: II. Discovery and investigation of open clusters in the galactic plane     

E. V. Glushkova  S. E. Koposov  I. Yu. Zolotukhin  Yu. V. Beletsky  A. D. Vlasov  S. I. Leonova 《Astronomy Letters》2010,36(2):75-85

Automated search for star clusters in J, H, K _s data from 2MASS catalog has been performed using the method developed by Koposov et al. (2008). We have found and verified 153 new clusters in the interval of the galactic latitude −24° < b < 24°. Color excesses E(B − V), distance moduli and ages were determined for 130 new and 14 yet-unstudied known clusters. In this paper, we publish a catalog of coordinates, diameters, and main parameters of all the clusters under study. A special web-site available at has been developed to facilitate dissemination and scientific usage of the results.  相似文献   

Simulating flood events at the Twin Ports of Duluth-Superior using a linked hydrologic-hydrodynamic framework     

Fitzpatrick  Lindsay  Titze  Daniel  Anderson  Eric J.  Beletsky  Dmitry  Kelley  John G. W. 《Ocean Dynamics》2023,73(7):433-447

Ocean Dynamics - Generally, ports in the North American Great Lakes are not supported with navigational guidance (water level, water temperature, currents, ice) by NOAA’s Great Lakes...  相似文献   

Modeling the ice-attenuated waves in the Great Lakes     

Bai  Peng  Wang  Jia  Chu  Philip  Hawley  Nathan  Fujisaki-Manome  Ayumi  Kessler  James  Lofgren  Brent M.  Beletsky  Dmitry  Anderson  Eric J.  Li  Yaru 《Ocean Dynamics》2020,70(7):991-1003

Ocean Dynamics - A partly coupled wave-ice model with the ability to resolve ice-induced attenuation on waves was developed using the Finite-Volume Community Ocean Model (FVCOM) framework and...  相似文献   

On the CH B‐X (1, 0) band in translucent clouds     

T.  Weselak  G. Galazutdinov  Y. Beletsky  J. Kre&#x;owski 《Astronomische Nachrichten》2011,332(2):167-171

We present observations of CH B‐X (1, 0) band toward 13 translucent sightlines. The given precise positions (at 3627.403, 3633.289, 3636.222 Å) are derived by means of shifting our spectra to the rest velocity frame using B‐X (0, 0) features (at 3878, 3886 and 3890 Å). The proposed oscillator strengths (equal to 0.00035, 0.00104, 0.00069, respectively) are based on f ‐values of the CH B‐X (0, 0) system, i.e. 0.00110, 0.00320, 0.00210 (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)  相似文献   

Features of longitudinal variations in atmospheric temperature at heights of the radiating layer of 557.7-nm emission of atomic oxygen     

A. I. Semenov  N. N. Shefov  I. V. Medvedeva  A. B. Beletsky 《Geomagnetism and Aeronomy》2012,52(2):248-253

On the basis of correlations between seasonal variations in the intensity and temperature of 557.7-nm emission, the mean monthly longitudinal variations in temperature are drawn. A comparison is performed with the data of interferometer and lidar measurements of temperature performed at various stations, as well as with the results of satellite studies. The dependences of the amplitudes of seasonal variations in temperature on latitude are obtained.  相似文献   

Comparison of ground-based OH temperature data measured at Irkutsk (52°N, 103°E) and Zvenigorod (56°N, 37°E) stations with Aura MLS v3.3     

Irina V. Medvedeva  Anatoly I. Semenov  Vladimir I. Perminov  Alexander B. Beletsky  Andrey V. Tatarnikov 《Acta Geophysica》2014,62(2):340-349

Data about the variations of mesopause temperature (～87 km) obtained from ground-based spectrographic measurements of the OH emission (834.0 nm, band (6-2)) at Irkutsk and Zvenigorod observatories were compared with satellite data on vertical temperature distribution in the atmosphere from Aura MLS v3.3. We analyzed MLS data for two geopotential height levels: 0.005 hPa (～84 km) and 0.002 hPa (～88 km) as the closest to OH height (～87 km). We revealed that Aura MLS temperature data have lower values than ground-based (cold bias). In summer periods, that difference increases. Aura cold biases compared with OH(6-2) at Irkutsk and Zvenigorod were calculated. For the 0.002 hPa height level, the biases are 10.1 and 9.4 K, and for 0.005 hPa they are 10.5 and 10.2 K at Irkutsk and Zvenigorod, respectively. When the bias is accounted for, an agreement between Aura MLS and OH(6-2) data obtained at both Irkutsk and Zvenigorod is remarkable.  相似文献   

Development and skill assessment of a real-time hydrologic-hydrodynamic-wave modeling system for Lake Champlain flood forecasting     

Titze  Daniel  Beletsky  Dmitry  Feyen  Jesse  Saunders  William  Mason  Lacey  Kessler  James  Chu  Philip  Lee  Deborah 《Ocean Dynamics》2023,73(5):231-248

Ocean Dynamics - In response to record-breaking flooding on Lake Champlain in 2011, the International Joint Commission launched a 5-year study to explore solutions to flooding in the binational...  相似文献