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  • 1
    In: Fire, MDPI AG, Vol. 6, No. 3 ( 2023-03-15), p. 122-
    Abstract: In 2019, the southern region of Eastern Siberia (located between 45° N and 60° N) experienced heavy floods, while the northern region (between 60° N and 75° N) saw intense forest fires that lasted for almost the entire summer, from 25 June to 12 August. To investigate the causes of these natural disasters, we analyzed the large-scale features of atmospheric circulation, specifically the Rossby wave breaking and atmospheric blocking events. In the summer of 2019, two types of Rossby wave breaking were observed: a cyclonic type, with a wave breaking over Siberia from the east (110° E–115° E), and an anticyclonic type, with a wave breaking over Siberia from the west (75° E–90° E). The sequence of the Rossby wave breaking and extreme weather events in summer, 2019 are as follows: 24–26 June (cyclonic type, extreme precipitation, flood), 28–29 June and 1–2 July (anticyclonic type, forest fires), 14–17 July (both types of breaking, forest fires), 25–28 July (cyclonic type, extreme precipitation, flood), 2 and 7 August (anticyclonic type, forest fires). Rossby wave breaking occurred three times, resulting in the formation and maintenance of atmospheric blocking over Eastern Siberia: 26 June–3 July, 12–21 July and 4–10 August. In general, the scenario of the summer events was as follows: cyclonic Rossby wave breaking over the southern part of Eastern Siberia (45° N–60° N) caused extreme precipitation (floods) and led to low gradients of potential vorticity and potential temperature in the west and east of Lake Baikal. The increased wave activity flux from the Europe–North Atlantic sector caused the anticyclonic-type Rossby wave breaking to occur west of the area of a low potential vorticity gradient and north of 60° N. This, in turn, contributed to the maintenance of blocking anticyclones in the north of Eastern Siberia, which led to the intensification and expansion of the area of forest fires. These events were preceded by an increase in the amplitude of the quasi-stationary wave structure over the North Atlantic and Europe during the first half of June.
    Type of Medium: Online Resource
    ISSN: 2571-6255
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2924038-4
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  • 2
    In: Geosfernye issledovaniya, Tomsk State University, , No. 3 ( 2021-09-01), p. 115-124
    Type of Medium: Online Resource
    ISSN: 2542-1379
    URL: Issue
    Language: Unknown
    Publisher: Tomsk State University
    Publication Date: 2021
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  • 3
    In: Radiochimica Acta, Walter de Gruyter GmbH, Vol. 63, No. s1 ( 1993-12-01), p. 221-224
    Type of Medium: Online Resource
    ISSN: 2193-3405 , 0033-8230
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 1993
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  • 4
    Online Resource
    Online Resource
    ECO-Vector LLC ; 2021
    In:  Russian Journal of Physiotherapy, Balneology and Rehabilitation Vol. 20, No. 1 ( 2021-02-15), p. 31-36
    In: Russian Journal of Physiotherapy, Balneology and Rehabilitation, ECO-Vector LLC, Vol. 20, No. 1 ( 2021-02-15), p. 31-36
    Abstract: BACKGROUND: One of the indicators for assessing the state of human health is the body mass index. But this indicator does not give an objective picture, for example, it does not reflect the features of a person's physique. To assess the type of obesity, the ratio of waist circumference to hip circumference is used. This can lead to an incorrect assessment of the nutritional status, and, accordingly, incorrect recommendations for the prevention of non-communicable human diseases. АIMS: To evaluate the indicators: body mass index and the ratio of waist circumference to hips, the results were compared with the data of a bioimpedance study. MATERIALS AND METHODS: 154 people of different physical fitness were examined (105 people are athletes, 49 are not engaged in sports). All the surveyed are men, from 15 to 25 years old. The results were obtained for the following indicators: body mass index, waist-to-hip ratio, bioimpedance study (assessment of fat mass, lean mass, active cell mass, dry muscle mass, total, extracellular and intracellular water). RESULTS: Тhe body mass index significantly correlates with such indicators as fat mass, lean mass, dry muscle mass, as well as the water content in the body. The correlation relationship with fat mass is positive, with other indicators ― negative. There is no reliable correlation with the active cell mass. The ratio of waist circumference to hips had a reliable relationship with all the indicators we evaluated. A negative correlation was noted with the fat mass, and a positive correlation was observed for the rest of the indicators. In people who are actively engaged in sports, the relationship between the body mass index and the content of adipose tissue in the body is more pronounced. The body mass index and the ratio of waist circumference to hip circumference in athletes are more correlated with the data of the bioimpedance study. A reliable relationship between the body mass index and the ratio of the waist circumference to the hips has not been established. Thus, it is necessary to conclude that when assessing the state of the body, it is necessary to take into account both indicators. None of these parameters can be used to determine the risks of developing non-communicable diseases. CONCLUSION: Body mass index indicators, as well as the ratio of waist circumference to hips, significantly correlate with the results of bioimpedance examination, with the exception of active cell mass. It is advisable to use the body mass index and the ratio of waist circumference to hips as one of the simplest ways to determine risk groups for the development of non-communicable diseases during a mass screening study.
    Type of Medium: Online Resource
    ISSN: 2413-2969 , 1681-3456
    Language: Unknown
    Publisher: ECO-Vector LLC
    Publication Date: 2021
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