bluuebunny/crossref_metadata_2025_split huggingface dataset:
J/ψ-J/ψ scattering cross sections of quadratic and Cornell potentials
Authors: Imran Jamil M. , Sohail Gilani S.M. , Wasif Ahmad , Sattar Khan Abdul , Awan Ahmad 
Published: November 2020

Abstract
We study the scattering of

-

mesons using quadratic and Cornell potentials in our tetraquark (

) system. The system’s wavefunction in the restricted gluonic basis, which is written by utilizing the adiabatic approximation and Hamiltonian, is used via a quark potential model. The resonating group technique is used to obtain the integral equations, which are solved to obtain the unknown inter-cluster dependence of the total wavefunction of our tetraquark system. T-Matrix elements are calculated from the solutions, and eventually, the scattering cross sections are obtained using the two potentials. We compare these cross sections and find that the magnitudes of scattering cross sections of quadratic potential are higher than the Cornell potential.
Effective field theory approach to lepto-philic self-conjugate dark matter
Authors: Bharadwaj Hrishabh , Goyal Ashok 
Published: November 2020

Abstract
We study self-conjugate dark matter (DM) particles interacting primarily with Standard Model (SM) leptons in an effective field theoretical framework. We consider SM gauge-invariant effective contact interactions between Majorana fermion, real scalar and real vector DM with leptons by evaluating the Wilson coefficients appropriate for interaction terms up to dimension 8, and obtain constraints on the parameters of the theory from the observed relic density, indirect detection observations and from the DM-electron scattering cross-sections in direct detection experiments. Low energy LEP data has been used to study sensitivity in the pair production of low mass (

80 GeV) DM particles. Pair production of DM particles of mass

50 GeV in association with mono-photons at the proposed ILC has rich potential to probe such effective operators.
Energy meters in District-Heating Substations for Heat Consumption Characterization and Prediction Using Machine-Learning Techniques
Authors: Lumbreras Mikel , Garay Roberto , Marijuan Antonio Garrido 
Published: November 2020

Abstract
The use of smart energy meters enables the monitoring of large quantity of data related to heat consumption patterns in buildings connected to DH networks. This information can be used to understand the interaction between building and the final users´ without accurate information about building characteristics and occupational rates. In this paper an intuitive and clarifier data-driven model is presented, which couples heat demand and weather variables. This model enables the disaggregation of Space-Heating & Domestic Hot water demand, characterization of the total heat demand and the forecasting for the next hours. Simulations for 53 building have been carried out, with satisfactory results for most of them, reaching R2 values above 0.9 in some of them.
Climate Change: Causes, Risks, Consequences, Problems of Adaptation and Management (CLIMATE-2019)
Authors: Mokhov I I , Chernockulsky A V , Repina I A 
Published: November 2020

Abstract
The conference “Climate Change: Causes, Risks, Consequences, Problems of Adaptation and Management” was held in Moscow in November 2019. The results of various areas of climate research were presented at the conference, including the diagnosis of modern climate change based on observational data, reanalysis and paleoreconstructions; modeling of current and future climate change; risk assessment of extreme climatic events; determination of the relative role of natural and anthropogenic factors in climate change; studies of the socio-economic consequences of climate change and adaptation to them. The conference was attended by 214 participants from 46 organizations of the Russian Academy of Sciences, Roshydromet, universities and others. 72 oral reports were presented, including 15 invited talks, and 86 poster presentations.
List of titles 1. Diagnosis of modern climate changes based on observational data, reanalysis, and paleoreconstructions. 2. Modeling of modern and future climate change. 3. The risk of extreme climatic events. 4. The relative role of natural and anthropogenic factors in climate change. 5. Socio-economic consequences of climate change and adaptation to them are available in this pdf.
Role of the deep ocean in forming of the global warming slowdown
Authors: Bekryaev R V 
Published: November 2020

Abstract
A slowdown of the increase of the surface air temperature (SAT) at the beginning of the 21 century has provoked the discussion for the phenomenon nature and responsible physical mechanisms. One of the most accepted hypothesis connects the slowdown of SAT rise to anomalously intensive uptake of heat energy by the deep ocean layers. We suppose that verification of the theory can be achieved via the study of the interrelationship of the surface and the deep ocean layers temperatures. Establishing the time shifts and especially the sign of the cross-correlation function of the two temperatures can shed light on the solidity of the theory background. For the aims of the study, we have used a stochastically forced two-box climate model. Analytical estimation of correlation functions and spectral characteristics of the model demonstrates that deep ocean heat uptake cannot serve as a driver of the SAT slowdown (at least in the framework of the model). The cross-correlation function of upper layer and deep ocean temperatures stays nonnegative for any time lag. It means that heat redistribution between layers cannot lead to hiatus forming. Moreover, a comparison of the two-box model and Hasselmann model spectral characteristics evidences that the deep ocean serves as a pacemaker of climate variability in the broad range of frequencies.
Response of the atmospheric rivers and storm tracks to the Sudden Stratospheric Warming events on the basis of North Atlantic Atmospheric Downscaling (1979+)
Authors: Gavrikov A V , Krinitsky M , Tilinina N , Zyulyaeva Y , Dufour A , Gulev S K 
Published: November 2020

AbstractIn this study, we analyse fast (within 30 days) response of the atmospheric rivers and storm tracks positioning over the western European coast to the Sudden Stratospheric Warming (SSW) events. Analysis is done on the basis of North Atlantic Atmospheric Downscaling (NAAD) product with 14 km and 3-hourly spatial and temporal resolutions. Atmospheric rivers and cyclones are synoptic atmospheric phenomena characterized by the strong impact onto the mid- and high latitude costal zones. This impact results in extreme precipitation and wind events, floodings, long wet episodes, etc. Among other mechanisms controlling the positioning of the storm track and atmospheric rivers, we show that SSW events cause a significant southward shift of both storm track and location of the hit of the European coast by atmospheric rivers within 30 days after the SSW event. Thus, we provide a qualitative and quantitative measure of the SSWs impact on the location of the potentially extreme weather events over the European coast with 30 days predictive time scale.
Heat and cold waves at the South of the Russian Far East in 1999-2017
Authors: Grigorieva E A 
Published: November 2020

AbstractThreshold values of 3% and 97% percentiles of annual distribution of mean daily temperature are used to determine the cold and heat waves, respectively, for weather stations in the southern part of the Russian Far East for the period from December 1999 to 2017. Cold waves are identified mainly in December and January. The coldest winter seasons with the longest cold waves, up to 11 days, were observed in 2000/2001 and 2012/2013; the maximum total excess of negative temperatures over the threshold value was 116°C in weather station Poliny Osipenko. Heat waves were registered mainly in July. The hottest summer was in 2011, when heat wave was observed during July and August, with the longest wave at the northern Nikolaevsk-on-Amur; the maximum total excess of positive temperatures over the threshold was 74°C in Poliny Osipenko. There was no clear trend in the inter-annual dynamics of mean temperatures of winter and summer, but temperature variations can reach ±6°C and ±4, respectively. Climate extremes vary significantly during the study period, but usually rarely go beyond two standard deviations. Taking into account the possible impact of extreme temperatures on human health, their effect on the increase of mortality in Khabarovsk is discussed.
Long-term trends in the mass concentration of near-surface aerosol at Zvenigorod Scientific Station of the A. M. Obukhov Institute of Atmospheric Physics RAS from 1991-2019 measurements
Authors: Gruzdev A N , Isakov A A , Anikin P P 
Published: November 2020

Abstract
Estimates of seasonally dependent trends in the mass concentration of the near-surface aerosol are presented on the base of results of 29-year measurements at the Zvenigorod Scientific Station of the A. M. Obukhov Institute of atmospheric physics. The station is located in the woody countryside, 50 km west to Moscow. The multiple regression method is used for the analysis, in which autocorrelation of measurement data on large time scales is taken into account. Two periods are considered: 1991-2002 and 2013-2019. Excluded is the period 2003-2012 when abnormally high aerosol concentrations of unknown origin were often observed. For the periods 1991-2002 and 2013-2018, statistically significant negative trends were obtained for spring and summer seasons, respectively, and for the entire year. The spring trend in logarithm of concentration in 1991-2002 was -2.6% per year, and the annual trend was about -0.7% per year. For 2013-2019 a strong negative trend of about -6% per year was obtained in the summer season, and the annual trend estimate was -2.3% per year. The probable cause of the negative aerosol trend in the spring seasons of 1991-2002 is long-term changes in atmospheric transport. The negative trend in the summer seasons of 2013-2019 is probably due to the negative trend of summer temperature, drying and felling of spruce forest.
Analysis of continentality and anomality of Svalbard climate according to observations of surface air temperature in the second half of the XX century
Authors: Ivanov B V , Prokhorova U V , Sviashchennikov P N 
Published: November 2020

Abstract
The article discusses the regional features of the Svalbard climate based on the data of regular meteorological observations obtained at Norwegian, Russian and Polish stations. Attention is paid to the spatial features of the multi-year regime of surface air temperature (SAT). Climatic norms (1961-1990, WMO recommendations) calculated from all meteorological stations, as well as long-term changes in the spatial gradients of the SAT and estimates of the range of annual fluctuations, revealed stations (area) with a “continental” and “marine” type of climate, as well as trends in spatial heterogeneities of the Svalbard climate. The rate of “modern” climate warming (1990-2016) was, on average, three times higher compared with the period after II World War (1948-2016). The continentality and abnormality of the climate are analyzed. Conclusions are formulated about a regular change in the spatial features of the climate (SAT) and the manifestation of its anomalous nature in different periods (1960-1970, 1988 and 2005-2014).
Preliminary data on the methane emission from lake seeps of the Western Siberia permafrost zone
Authors: Kazantsev V S , Krivenok L A , Dvornikov Y A 
Published: November 2020

AbstractLakes are one of the most important sources of the greenhouse gas methane. Usually, only diffusive emission is counted towards in estimates of the Arctic lakes contribution to the atmospheric methane budget. At the same time, for some regions, giving the importance for the ebullition of various genesis significantly increases previous assessments of ecosystem-based lake methane emission. This paper presents the results of a study of two gas seeps on the Central Yamal lake. The methane concentration in seep gas varies from 94.2 to 100%. Mean annual methane emission from each seep is estimated as 46.1 and 67.1 kgCH4per year respectively. According to the analysis of the methane isotopic composition, it is of biogenic origin. Studied gas seeps are obviously direct channels of methane emission from permafrost to the atmosphere.
Diagnostics of the upper-air temperature and wind climate changes based on radiosonde observations and on the fifth-generation reanalysis
Authors: Lavrov A S , Sterin A M , Khohlova A V 
Published: November 2020

Abstract
RIHMI-WDC carries out monitoring of the components of the climate system, such as temperature and wind speed in the free atmosphere. The basis for monitoring are global radiosonde observations accumulated at RIHMI-WDC. Reanalyses of the latest generation, characterized by high temporal and spatial resolution, are also a source of data for climate monitoring of the free atmosphere. The article presents the results of comparison of time series from different sources, discusses the features of the distribution of the upper-air temperature and wind speed over the northern hemisphere, as well as their trends. A comparison of the results obtained from various sources is discussed.
Sea ice - atmosphere heat exchange during expedition “Transarctica-2019”
Authors: Makhotina I A , Makshtas A P , Yu Kustov V 
Published: November 2020

Abstract
This paper describes the characteristics of atmospheric surface layer and heat balance components of snow-ice cover during drift of RV “Akademik Treshnikov” to the north of the archipelagos Franz Josef Land and Svalbard, in the area 80 - 82N, 30 - 45E, in comparison with observations at drifting station North Pole-35”, worked in the same area in April 2008, and “Ice Base Cape Baranova” in April 2019. Characteristics of atmospheric surface layer and the energy exchange processes during the drift of the expedition”Transarctica-2019” were significantly affected by the presence of clouds and the state of the ice cover. The influence of these factors led to a decrease in the radiative cooling of the surface, the formation of a warmer and wetter ABL and to a weakening of the turbulent exchange between the atmosphere and the snow-ice cover. Comparison of energy exchange characteristics, calculated for the Bolshevik Island (79° N) and for expedition “Transarctica 2019” area shows good agreement between the monthly averaged values and trends in heat fluxes, despite the fact that in the first case the underlying surface was sea ice cover, and in the second it was the land surface.
Assessment of the effect of long-range transport on air pollution trends for different Russian regions
Authors: Makosko A A , Matesheva A V 
Published: November 2020

Abstract
The features of the dynamics of long-range atmospheric pollution of the territories of the Russian Federation under current conditions, in the immediate and distant prospects (from 1980 to 2050) taking into account two scenarios of the changing climate in the 21st century were studied. To assess contribution and trends of long-range atmospheric pollution in Russian regions, a two-dimensional numerical model is constructed, which implements the solution of the coupled problem of transport and diffusion of impurities in spherical coordinates, as well as an improved method for identifying sources of transboundary and local air pollution. The results indicate general trends in the directions of the flow of pollutants to the Russian regions in 1980-2050 from zonal (western) to meridional (southern). Such dynamics is markedly expressed in the regions of Siberia and the Far East and slightly in the European territory of Russia and the Urals. In the climatic scenario RCP8.5, despite the general tendency towards the southern transport of impurities, a certain dispersion of directions from where the regions are polluted becomes noticeable. It indicates an increase in atmospheric pollution from the west in certain regions, mainly in the central part and in the south of the ETR. The greatest danger to long-range atmospheric pollution of the regions of Siberia and the Far East in the coming decades will be sources located south of these territories; of the regions of the ETR and the Urals – sources located to the west and south. These results are important for the development of proposals for ensuring the environmental safety of Russian regions and for planning economic development of the country’s territories that affect the pollution of the environment of ecologically significant zones.
Marine cold air outbreaks in the Russian Arctic: climatology, interannual variability, dependence on sea-ice concentration
Authors: Narizhnaya A I , Chernokulsky A V , Akperov M G , Chechin D G , Esau I , Timazhev A V 
Published: November 2020

Abstract
In this study, we evaluated the climatology and interannual variability of marine cold-air outbreaks (MCAOs) in the Russian Arctic marginal seas (from the Barents to Chukchi seas). We used a simple index for identifying MCAOs based on the vertical potential temperature gradient between the sea surface and the 800 hPa level. We calculated the index using 6-hourly Era-Interim data for the 1979–2018 period. Given the index, we evaluated spatial and temporal variability of weak, medium, and strong MCAOs frequency as well as their dependence on sea-ice concentration using non-parametric tests. The most intense MCAOs were found in the Barents and Kara seas. The annual cycle maximum for the western Russian Arctic (WRA) were found in wintertime, while it was revealed in mid-late autumn for the eastern Russian Arctic (ERA). In the WRA, we found a statistically significant decrease in amount of strong MCAOs in winter and late autumn and a general strengthening of MCAOs in spring. Meanwhile, over the ERA region, increase of moderate and weak cold-air intrusions during October and November was revealed.
Characteristics of the upper troposphere wind field according to the satellite measurements and their connection with climatic parameters
Authors: Nerushev A F , Visheratin K N , Ivangorodsky R V 
Published: November 2020

Abstract
The results of the study of the spatio-temporal variability of the main characteristics of jet streams and turbulence zones in the upper troposphere of the Northern Hemisphere according to measurements from European geostationary meteorological satellites for the period 2007 - 2018 are presented. Their relationship with the essential parameters of the Earth’s climate system — the temperature of the troposphere, the area of sea ice, and also large-scale atmospheric phenomena is considered. It has been shown that over the past 12 years there has been a significant increase in the area of regions occupied by relatively weak and moderate turbulence and a slight decrease in areas with strong and very strong turbulence. Based on the cross-wavelet analysis in the time-frequency space, the relationships between the variations in the areas of the turbulent regions and the majority of the characteristics of jet streams are revealed. A close relationship has been established between the characteristics of jet streams and the areas of turbulent zones with the temperature of the upper troposphere. In this case, the effect of temperature on the area of turbulent zones manifests itself indirectly through the characteristics of jet streams. A significant association of variations in the average area of the jet stream and the latitudinal position of its center with the area of sea ice are noted. According to spectral and wavelet analysis of the characteristics of jet streams, along with annual and quasi-biennial oscillations, short-period oscillations are observed with periods in the range of 10-40 days, which can be interpreted as a manifestation of Rossby waves..
Short-lived climate forcers in the Russian Arctic atmosphere according to ship-borne measurements in 2015-2019
Authors: Pankratova N , Belikov I , Belousov V , Kopeikin V , Skorokhod A , Shtabkin Yu , Malafeev G , Muravya V , Flint M 
Published: November 2020

Abstract
We observed the surface concentration and isotopic composition (δ13CCH4) of methane (CH4), ozone (O3), nitrogen oxide (NO/NO2) and carbon monoxide (CO), as well as black carbon (BC) content in the Russian Arctic seas aboard the research vessel. The effect of emissions from the vessel chimney on the data obtained is analyzed. We investigate the local areas of CH4 emissions from seabed where the concentration of CH4 can increase to 3.5 ppm. Notwithstanding that fact, mainly large-scale processes of air mass transfer determine the average concentration of methane in surface air in the Arctic seas. In addition, we analyze the distribution of BC along the route of the vessel. It was found that excess concentrations of BC over background values are observed occasionally during advection of air masses from the mainland, from areas of associated gas burning and forest fires.
Effect from polynyas in the Siberian Arctic seas to atmospheric transport of heat and moisture
Authors: Prokhorova U V , Urazgildeeva A V 
Published: November 2020

Abstract
Coastal and fast ice polynyas in the Arctic seas can have a noticeable effect on the Arctic climate, increasing the temperature of the cold air which coming from continental Siberia in winter to these seas and in the Arctic basin [1-2]. In this paper, were studied the effect of polynyas on surface air temperature and on the meridional heat and moisture transfers according to expeditionary observations and ERA-Interim reanalysis. According to the results of expeditionary observations carried out in the 1990s, estimates of heat inflows from the surface of the polynya were calculated. From reanalysis, meridional heat transfers were obtained through 70 ° N, air temperature profiles, wind speed in the region of the Laptev Sea (100 - 140 ° E.), and polynya which located in the Laptev Sea (120 - 130 ° E). It was confirmed that winter transfers of cold air from the mainland do not have a cooling effect on the average winter air temperature north of 70 ° N due to the heating effect of polynya.
Projections of temperature-dependent mortality in Russian subarctic under climate change scenarios: a longitudinal study across several climate zones
Authors: Revich B A , Shaposhnikov D A , Shkolnik I M 
Published: November 2020

Abstract
The magnitude of climate change in Arctic is greater than in other regions. Climate projections confirmed the ongoing warming in the circumpolar areas. The study goal was to estimate the fraction of mortality attributable to the exposition to non-optimal ambient temperatures during the 21st Century under the selected IPCC Representative Concentration Pathways RCP4.5 and RCP8.5. Three study areas were chosen to represent the different types of subarctic climate: from marine-type to transitional to extremely continental. Our dataset comprised 160363 deaths occurred between 1999 and 2016 in the cities of Murmansk, Archangelsk and Yakutsk. Non-linear distributed lag model was used to estimate the relationship between daily air temperatures and mortality rates. Daily temperature anomalies projected by the decades 2050-2059 and 2090-2099 were derived from the ensemble modelling with the regional climate model developed in the Voeikov Main Geophysical Observatory. The study showed positive net health impacts in all locations, and indicated uneven distribution of the benefits of climate change. Under the RCP8.5 scenario, mortality from all natural causes in the age group over 30 years will decrease by 4.5% (95% CI 1.1%; 7.9%) in Murmansk, 3.1% (1.1%; 5.1%) in Archangelsk and 3.6% (0.3%; 7.0%) in Yakutsk between the decades 1990-99 and 2090-99.