Влияние океанического притока тепла в Баренцево море на региональные изменения ледовитости и статической устойчивости атмосферы

The influence of the oceanic heat inflow into the Barents Sea on the sea ice concentration and atmospheric characteristics, including the atmospheric static stability during winter months, is investigated on the basis of the results of ensemble simulations with the regional climate model HIRHAM/NAOSIM for the Arctic. The static stability of the atmosphere is the important indicator of the spatial and temporal variability of polar mesocyclones in the Arctic region. The results of the HIRHAM/NAOSIM regional climate model ensemble simulations (RCM) for the period from 1979 to 2016 were used for the analysis. The initial and lateral boundary conditions for RCM in the atmosphere were set in accordance with the ERA-Interim reanalysis data. An analysis of 10 ensemble simulations with identical boundary conditions and the same radiation forcing for the Arctic was performed. Various realizations of ensemble simulations with RCM were obtained by changing the initial conditions for integrating the oceanic block of the model. Different realizations of ensemble simulations with RCM are obtained by changing the initial conditions of the model oceanic block integration. The composites method was used for the analysis, i.e. the difference between the mean values for years with the maximum and minimum inflow of oceanic water into the Barents Sea. The statistical significance of the results (at a significance level of p < 0.05) was estimated using Student's t-test. In general, the regional climate model reproduces the seasonal changes in the inflow of the oceanic water and heat into the Barents Sea reasonably well. There is a strong relationship between the changes in the oceanic water and ocean heat inflow, sea ice concentration, and surface air temperature in the Barents Sea. Herewith, the increase in the oceanic water inflow into the Barents Sea in winter leads to a decrease in static stability, which contributes to changes in regional cyclonic activity. The decrease of the static stability is most pronounced in the southern part of the Barents Sea and also to the west of Svalbard.На основе результатов ансамблевых расчётов с использованием региональной климатической модели HIRHAM/NAOSIM для Арктики исследовано влияние притока океанических вод в Баренцево море на концентрацию морских льдов и характеристики атмосферы в зимние месяцы. Показана определяющая роль вариаций притока океанических вод в Баренцево море на режим морских льдов и приповерхностной температуры воздуха, а также статическую устойчивость атмосферы в зимний период

Место современных продуктов прикорма в критическом периоде формирования здоровья ребенка

The current development of medicine and the results of recent large-scale academic research in pediatrics provide the convincing conclusions that the formation of human health begins in the antenatal period of ontogenesis and continues throughout the infancy. The ideas and subsequent academic research on the influence of nutrition during the first thousand days of life on the programming of metabolism and the development of some chronic somatic diseases such as obesity, hypertension, coronary heart disease have become widespread. In addition, at the same period of life immune abnormalities with a predominance of one of the subpopulations, Th1 or Th2, can possibly form in children at risk of developing allergies when immune response is developing. The predominance of the Th2 cytokine profile (hyperproduction of interleukins 4, 5, 13, etc.) suggests the possibility of stable formation of the atopic status in a child afterwards. Consequently, the application of academic knowledge on the health status programming by nutrition during early ontogenesis is an important tool in preventive pediatric practice.Развитие современной медицины, результаты последних масштабных научных исследований в педиатрии приводят к убедительным выводам, что формирование здоровья человека начинается в антенатальном периоде онтогенеза и продолжается на протяжении раннего детского возраста. Широкое распространение получили идеи и последовавшие за ними научные исследования о влиянии питания первых тысячи дней жизни в программировании метаболизма и развитии некоторых хронических соматических болезней, таких как ожирение, гипертоническая болезнь, ишемическая болезнь сердца. Вместе с тем в этот же период жизни у детей групп риска по развитию аллергии при становлении иммунного ответа возможно программирование иммунных отклонений с преобладанием одной из субпопуляций — Th1 или Th2. Преобладание цитокинового профиля Th2 (гиперпродукция интерлейкинов 4, 5, 13 и др.) предполагает возможность стойкого формирования атопического статуса ребенка в дальнейшем. Следовательно, использование научных знаний о программировании состояния здоровья питанием в процессе раннего онтогенеза является важным инструментом в практической профилактической педиатрии.КОНФЛИКТ ИНТЕРЕСОВТ.В. Турти, Е.Г. Бокучава сотрудничают с АО «ПРОГРЕСС».И.А. Беляева сотрудничает с компанией «Пфайзер Инновации».Остальные авторы статьи подтвердили отсутствие конфликта интересов

The Application of Scanning Contact Potentiometry Method and Diffraction of Thermal Neutrons at Physico-Mechanical Tests of Materials

The results of physical and mechanical tests on the tensile strength of austenitic steel 12X18H10T, in the stress range from 100 MPa to the maximum value of 700 MPa, at which the sample was destroyed, are presented. Structural changes were registered synchronously by two methods: the method of scanning contact potentiometry and the method of diffraction of thermal neutrons. At loads above 650 MPa, the α-martensite phase was found in the austenite matrix, as well as the appearance of diffraction peaks characteristic of a cubic martensitic BCC lattice was observed in neutron spectra. On the potentiograms, this process corresponds to the appearance of local regions in which high values of electric potential gradients were observed. This is the case of discovery of the fatigue nucleus cracks in the tensile testing of steel ЭИ847 by the method of scanning contact potentiometry

The influence of ocean heat transport in the Barents Sea on the regional sea ice and the atmospheric static stability

The influence of the oceanic heat inflow into the Barents Sea on the sea ice concentration and atmospheric characteristics, including the atmospheric static stability during winter months, is investigated on the basis of the results of ensemble simulations with the regional climate model HIRHAM/NAOSIM for the Arctic. The static stability of the atmosphere is the important indicator of the spatial and temporal variability of polar mesocyclones in the Arctic region. The results of the HIRHAM/NAOSIM regional climate model ensemble simulations (RCM) for the period from 1979 to 2016 were used for the analysis. The initial and lateral boundary conditions for RCM in the atmosphere were set in accordance with the ERA-Interim reanalysis data. An analysis of 10 ensemble simulations with identical boundary conditions and the same radiation forcing for the Arctic was performed. Various realizations of ensemble simulations with RCM were obtained by changing the initial conditions for integrating the oceanic block of the model. Different realizations of ensemble simulations with RCM are obtained by changing the initial conditions of the model oceanic block integration. The composites method was used for the analysis, i.e. the difference between the mean values for years with the maximum and minimum inflow of oceanic water into the Barents Sea. The statistical significance of the results (at a significance level of p < 0.05) was estimated using Student's t-test. In general, the regional climate model reproduces the seasonal changes in the inflow of the oceanic water and heat into the Barents Sea reasonably well. There is a strong relationship between the changes in the oceanic water and ocean heat inflow, sea ice concentration, and surface air temperature in the Barents Sea. Herewith, the increase in the oceanic water inflow into the Barents Sea in winter leads to a decrease in static stability, which contributes to changes in regional cyclonic activity. The decrease of the static stability is most pronounced in the southern part of the Barents Sea and also to the west of Svalbard

Detector for the FSD FourierDiffractometer Based on ZnS(Ag)/^{6}LiF Scintillation Screen and Wavelength Shifting Fibers Readout

At the IBR2 pulsed reactor (FLNP, JINR, Dubna), a specialized timeofflight instrument FourierStressDiffractometer (FSD) intended for the measurement of internal steresses in bulk samples by using highresolution neutron diffraction is under construction. One of the main components of the diffractometer is a newtype detector with combined electronic geometrical focusing uniting a large solid angle and a small geometry contribution to the instrumental resolution. The first two modules of the detector, based on scintillation screen ZnS(Ag)/^{6}LiF with wavelength shifting fibers readout have been developed and tested. The design of the detector and associated electronics are described. The method of time focusing surface approximation, using the screen flexibility is proposed. Characteristics of tested modules in comparison with a detector of previous generation are presented and advantages of new detector design for highresolution diffractometry are discussed