THE INFLUENCE OF LANDSCAPE ELEMENTS ON THE DISTRIBUTION OF SNOW COVER ACCORDING TO FIELD MEASUREMENTS AND ANALYSIS (ON THE EXAMPLE OF PERM)

L. A. Zlydneva, E. Pischalnikova
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引用次数: 1

Abstract

The scientific interest in snow dynamics is growing steadily, especially in relation to climate variability. The ability to monitor snow cover is being improved, which makes it possible to take into account the characteristics of snow cover from hard-to-reach places in hydrodynamic models of the atmosphere. As a result, the quality of climate and weather forecasting improves. This paper presents an analysis of field observation data in small relief forms with observation data from a stationary network of ground-based observations and ERA5-Land reanalysis. It was found that the temporal variability of the height and density of the snow cover in various elements of the landscape is successfully reproduced by reanalysis. The closest values of the characteristics of the snow cover are observed during the period of its formation. The greatest unevenness in the distribution of snow cover is distinguished by negative landforms and forest edges, which seems to be determined by snowstorm transport. The height of the snow cover in the field during route observations in the vicinity of the meteorological station and stationary observations at the meteorological station has discrepancies on average by 1-4 cm. The height of the snow cover in the gully is 10-22% higher than in the field and 10% more than in the log. It is shown that the highest snow density is observed in open areas, since in open areas, the wind seems to play an important role in compaction of the snow cover. Comparison of field observation data with reanalysis on the distribution of snow cover density shows small discrepancies: no more than 0.08 g/ cm. The maximum deviation from the actual data is observed in the first half of March.
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基于野外实测分析的景观要素对积雪分布的影响(以彼尔姆为例)
对雪动力学的科学兴趣正在稳步增长,特别是与气候变率的关系。监测积雪的能力正在提高,这使得在大气水动力模型中考虑到难以到达的地方的积雪特征成为可能。因此,气候和天气预报的质量得到了提高。本文利用地面固定观测网和ERA5-Land再分析资料对小地形的野外观测资料进行了分析。通过再分析,成功再现了景观各要素中积雪高度和密度的时间变异性。积雪特征最接近的值出现在积雪形成时期。积雪分布的不均匀性以负地形和森林边缘为特征,这似乎是由暴风雪运输决定的。气象站附近路线观测的野外积雪高度与气象站固定观测的积雪高度平均相差1 ~ 4 cm。沟内积雪高度比野外高10 ~ 22%,比原木高10%。结果表明,在开阔地区,雪密度最高,因为在开阔地区,风似乎对积雪的压实起着重要作用。野外观测资料与再分析积雪密度分布差异不大,不超过0.08 g/ cm。与实际数据的最大偏差出现在3月上半月。
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THE FIRST RECORD OF THE ANTLION MYRMELEON BORE (TJEDER, 1941) (NEUROPTERA: MYRMELEONTIDAE) IN THE SOUTH OF UDMURTIA NEW PALYNOLOGICAL DATA FROM UPPER JURASSIC DEPOSITS OF THE WESTERN CAUCASUS DYNAMICS OF THE WARM SEASON EXTREME TEMPERATURE EVENTS IN IZHEVSK IN THE PERIOD OF 1961-2020 ALL-RUSSIAN CONFERENCE IN RYAZAN METHODOLOGICAL RECOMMENDATIONS FOR THE USE OF REPRODUCTIVE TECHNOLOGIES TO CREATE GENETICALLY MODIFIED RABBITS
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