The NOx-Limiting Regime of Photochemical Ozone Generation in a Weakly Polluted Convective Boundary Layer: Observations at the ZOTTO Tall Tower Observatory in Central Siberia, 2007–2015     

Moiseenko  K. B.  Berezina  E. V.  Vasileva  A. V.  Shtabkin  Yu. A.  Skorokhod  A. I.  Elanskii  N. F.  Belikov  I. B. 《Doklady Earth Sciences》2019,487(2):981-985

Doklady Earth Sciences - Estimates of the photochemical ozone generation rate, PQ, and the ozone production efficiency (OPE) per molecule of NOx (=NO + NO2), ∆P, are obtained for the region...  相似文献   

Observations and light curve solutions of a selection of middle-contact W UMa binaries     

Diana Petrova Kjurkchieva  Velimir Angelov Popov  Doroteya Lyubenova Vasileva  Nikola Ivanov Petrov 《天文和天体物理学研究(英文版)》2018,(4)

Photometric observations in Sloan g′and i′ bands of W UMa binaries NSVS 4340949,T-Dra0–00959,GSC 03950–00707,NSVS 4665041,NSVS 4803568,MM Peg,MM Com and NSVS4751449 are presented.The light curve solutions revealed that the components of each target are of G and K spectral types.The binaries of the sample have middle-contact configurations whose fillout factors are within the range 0.2–0.4.The only exception is NSVS 4751449 which is in deeper contact(fillout factor of 0.55).It precisely obeys the relation between mass ratio and fillout factor for deep,low mass ratio overcontact binaries.One of the eclipses of almost all targets(except MM Peg)is an occultation and their photometric mass ratios and solutions could be accepted with confidence.We found that the target components have almost equal temperatures but differ considerably in size and mass.The components of the partially-eclipsed MM Peg have close parameters.Our solutions reveal that NSVS 4340949,T-Dra0–00959,NSVS 4803568 and MM Com are of W subtype while GSC 03950–00707,NSVS 4665041,MM Peg and NSVS 4751449 are of A subtype.This subclassification is well-determined for all totallyeclipsed binaries.The targets confirm the trends in which W-subtype systems have smaller periods and lower temperatures than A subtype binaries.  相似文献   

Peculiarities of the abundance of chemical elements in the atmosphere of PMMR23-red supergiant in the Small Magellanic Cloud due to interstellar gas accretion     

A. V. Yushchenko  V. F. Gopka  A. V. Shavrina  V. A. Yushchenko  S. V. Vasileva  S. M. Andrievsky  A. A. Raikov  S. Kim  P. Rittipruk  Y. Jeong  Y.-W. Kang 《Kinematics and Physics of Celestial Bodies》2017,33(5):199-216

The chemical composition of the PMMR23 red supergiant located in the Small Magellanic Cloud (SMC) is analyzed. The abundance of 35 chemical elements and the upper limits of abundance for Tl and U are found. The relative abundance of heavy elements is higher by 0.6–1.0 dex with respect to iron peak elements. The spectra of several SMC red supergiants PMMR27, PMMR28, and PMMR144—located in the region where the velocities of stars and interstellar gas are quite high— show the emission components in the wings of the hydrogen line. This emission is not detected for PMMR23. A possibility of interstellar gas accretion on the atmospheres of PMMR23 and other supergiants in Magellanic Clouds is discussed. The analysis is carried out using spectra measured at ESO 3.6 m telescope with the spectral resolving power R = 30000.  相似文献   

Actinium Abundance in the Atmospheres of Three Red Supergiants in the Magellanic Clouds     

V. F. Gopka  A. V. Shavrina  V. A. Yushchenko  A. V. Yushchenko  Ya. V. Pavlenko  S. M. Andrievsky  S. V. Vasileva  Ch. Kim  Y. Jeong  Yu. P. Lyubchik 《Kinematics and Physics of Celestial Bodies》2018,34(3):123-133

The actinium abundance in the atmospheres of red supergiants PMMR23 and PMMR144 in the Small Magellanic Cloud and RM_1-667 in the Large Magellanic Cloud was estimated. The results of spectral observations with the ESO 3.6-m telescope with resolving power R = 30000 were used. Since actinium was not found in the atmospheres of PMMR23 and PMMR144, only the upper limits were set on its abundance: logN(Ac/H) <–15.1 and–15.0, respectively. The estimated abundance of actinium in the atmosphere of RM_1-667 varied with parameters of the atmospheric model from–14.1 to–13.3. The lines of ionized actinium λ 616.475 nm and λ 581.085 nm were used in this analysis.  相似文献   

Evaluation of the Phosphorus Load on Freshwater Bodies of Subjects of the Russian Federation: Modeling of the Migration of Phosphorus and Its Compounds among Environmental Components     

Tarasova  N. P.  Makarova  A. S.  Vasileva  E. G.  Shlyakhov  P. I.  Zanin  A. A. 《Doklady Earth Sciences》2018,480(2):818-822

This article is devoted to a model of the migration of phosphorus and its compounds between the components of the environment and the evaluation of the phosphorus load on freshwater bodies on the scale of the subjects of the Russian Federation. The results of calculations described in this article show that a number of the subjects of the Russian Federation are susceptible to a high and extremely high risk of a negative impact of anthropogenic phosphorus on freshwater bodies.

  相似文献   

Light curve solutions and out-of-eclipse variabilities of six eccentric Kepler binaries     

D. Kjurkchieva  D. Vasileva  D. Dimitrov 《Astrophysics and Space Science》2016,361(4):132

  相似文献   

Coalingite from kimberlite breccia of the Manchary pipe,Central Yakutia     

N. V. Zayakina  O. B. Oleinikov  T. I. Vasileva  N. A. Oparin 《Geology of Ore Deposits》2015,57(8):732-736

Coalingite, Mg₁₀Fe₂(CO₃)(OH)₂₄ · 2H₂O, rare Mg–Fe hydrous carbonate, has been found in the course of the mineralogical study of a disintegrated kimberlite breccia from the Manchary pipe of the Khompu–May field located in the Tamma Basin, Central Yakutia, 100 km south of Yakutsk. Coalingite occurs as small reddish brown platelets, up to 0.2 mm in size. It is associated with lizardite, chrysotile and brucite, which are typical kimberlitic assemblage. Coalingite is a supergene mineral, but in this case, it is produced by the interaction of brucite-bearing kimberlite and underground water circulating through a vertical or oblique fault zone.  相似文献   

Structure,Rheology, Petrology,and Geodynamics of the Tectonosphere of the Sea of Japan     

Petrishchevsky  A. M.  Izosov  L. A.  Emelyanova  T. A.  Vasileva  M. A.  Lee  N. S. 《Oceanology》2021,61(1):104-118

Oceanology - The geological-structural, magmatic, seismic, and thermometric models of the Earth’s crust and upper mantle of the Sea of Japan region are considered in relation to...  相似文献   

Upper quaternary laminated sapropelic sediments from the continental slope of Baja California     

I. O. Murdmaa  G. H. Kazarina  L. Beaufort  E. V. Ivanova  E. M. Emelyanov  V. A. Kravtsov  G. N. Alekhina  V. E. Vasileva 《Lithology and Mineral Resources》2010,45(2):154-171

Core MD02-2508 retrieved from the plateau of the continental slope off Baja California recovered a 40-m-thick section of sapropel (up to 15% C_org), calcareous clay, and diatom ooze with the age of 120 ka at the core bottom. The section is subdivided into three units: Unit I (Holocene) consists of the laminated sapropel; Unit II comprising oxygen isotope stages (MIS) 2, 3, and 4 is represented by homogeneous calcareous clay with interbeds of slightly siliceous sapropelic mud; and Unit III (MIS-5) is composed of laminated sapropelic diatom ooze. Laminated intervals are characterized by the intercalation of two lamina types: (1) dark-colored organic-rich laminae containing multi-species “oceanic” diatom assemblages, as well as radiolarians, coccoliths, planktonic and benthic foraminifera; (2) lighter-colored laminae consisting of diatom ooze with the neritic colonial diatom assemblages commonly composed of one to three species of a single genera. The dark laminae are assumed to be generated within a high productivity zone over the slope, whereas light ones likely represent diatom mats produced by short-term boisterous phytoplankton blooms, possibly in the coastal upwelling.  相似文献   

Sources of and variations in tropospheric CO in Central Siberia: Numerical experiments and observations at the Zotino Tall Tower Observatory     

Yu. A. Shtabkin  K. B. Moiseenko  A. I. Skorokhod  A. V. Vasileva  M. Heimann 《Izvestiya Atmospheric and Oceanic Physics》2016,52(1):45-56

Contributions of climatically significant natural and anthropogenic emission sources in northern Eurasia to seasonal carbon monoxide (CO) variations observed at the Zotino Tall Tower Observatory (ZOTTO) in Central Siberia in 2007–2011 have quantitatively been estimated using the GEOS-Chem chemical transport model. It is shown that the formation of a stable continental pollution plume from sources in Western Europe, European Russia and southern Siberia during winter plays an important role in the regional balance of surface CO and allows one to explain 55–80% of the amplitude of the CO annual cycle observed at the ZOTTO station (~70–90 ppbv). During the warm period, the effect of the anthropogenic factor is weakly pronounced, and the background concentration of CO is regulated, first and foremost, by the oxidation of biogenic volatile organic compounds and fire activity in the region.  相似文献