Landscape Structure Analysis of the Orulgan Ridge Eastern Slope

Zakharov, Moisei; Danilov, Yuri; Gadal, Sébastien; Troeva, Elena; Cherosov, Mikhail

doi:10.17513/use.37791

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…1). В наших предыдущих публикациях [6,7], мы провели геоинформационное картографирование и ландшафтный анализ этого участка с выявлением 22 типов урочищ; 8 типов местности и 6 типов (подтипам) зональных(высотно-поясных) и интразональных ландшафтов. В растительности преобладают горные лиственничные редколесья с постепенным переходом в редины близ верхних границ и на переувлажненных участках.…”

Section: объект исследованияunclassified

Mountain permafrost landscape changes assessment by archive Landsat data using the principal component analysis

Захаров¹,

Гадаль²

2023

Vestnik of North-Eastern Federal University. Series "Earth Sciences"

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Аннотация. Обнаружение ландшафтных изменений на основе разновременных, мультиспектральных и мультисенсорных спутниковых изображений с накоплением огромного массива архивных данных и многочисленных методологических разработок становится главным инструментом для территориального планирования и оценок устойчивости геосистем. Динамика и эволюция горных мерзлотных ландшафтов Арктики и северотаежных регионов представляют интерес процессам в контексте изменения климатических условий в следствии глобального потепления. Для изучения структурным и хорологическим процессов ландшафтных изменений часто используются большие массивы разновременных спутниковых данных, охватывающих 30-летный период. Как показывают многочисленные публикации, по-прежнему трудным является выбор подходящего метода обнаружения изменений, особенно в сложных горных территориях с ярко выраженными функциональными изменениями в ландшафтах. В этой статье мы демонстрируем методику моделирования динамики горных мерзлотных ландшафтов на восточном склоне хребта Орулган (Северо-Восток Сибири). Анализ главных компонент был использован для улучшения информации об изменениях из суммированных мультиспектральных разновременных данных. Результаты показали, что в период с 1999 по 2021 год в горных мерзлотных ландшафтах произошли значительные изменения, связанные с процессами сдвигов границ бореальных лесов и «озеленения» тундры.

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Section: объект исследованияunclassified

Mountain permafrost landscape changes assessment by archive Landsat data using the principal component analysis

Захаров¹,

Гадаль²

2023

Vestnik of North-Eastern Federal University. Series "Earth Sciences"

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“…Permafrost varies greatly depending on the landscape class and lithological and geomorphological characteristics of terrain types. Our study was focused on vegetation (identification of geobotanical units), since our previous studies showed that in mountainous areas, terrain types have high contrast and fragmentation, which is why the visual representation of the map is very difficult and does not meet the goals of regional mapping in terms of distribution [38,43]. For the regional level of mapping, we did not implement the use of DEM analysis to identify all types of terrain, and we believe that it is necessary to map terrain types at the local level of mapping permafrost landscapes in combination with landscape types.…”

Section: Study Regionmentioning

confidence: 99%

Distribution and Structure Analysis of Mountain Permafrost Landscape in Orulgan Ridge (Northeast Siberia) Using Google Earth Engine

Zakharov

Gadal

Kamičaitytė

et al. 2022

Land

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An analysis of the landscape spatial structure and diversity in the mountain ranges of Northeast Siberia is essential to assess how tundra and boreal landscapes may respond to climate change and anthropogenic impacts in the vast mountainous permafrost of the Arctic regions. In addition, a precise landscape map is required for knowledge-based territorial planning and management. In this article, we aimed to explore and enhanced methods to analyse and map the permafrost landscape in Orulgan Ridge. The Google Earth Engine cloud platform was used to generate vegetation cover maps based on multi-fusion classification of Sentinel 2 MSI and Landsat 8 OLI time series data. Phenological features based on the monthly median values of time series Normalized Difference Vegetation Index (NDVI), Green Normalized Difference Vegetation Index (GNDVI), and Normalized Difference Moisture Index (NDMI) were used to recognize geobotanical units according to the hierarchical concept of permafrost landscapes by the Support Vector Machine (SVM) classifier. In addition, geomorphological variables of megarelief (mountains and river valleys) were identified using the GIS-based terrain analysis and landform classification of the ASTER GDEM scenes mosaic. The resulting environmental variables made it possible to categorize nine classes of mountain permafrost landscapes. The result obtained was compared with previous permafrost landscape maps, which revealed a significant difference in distribution and spatial structure of intrazonal valleys and mountain tundra landscapes. Analysis of the landscape structure revealed a significant distribution of classes of mountain Larix-sparse forests and tundra. Landscape diversity was described by six longitudinal and latitudinal landscape hypsometric profiles. River valleys allow boreal–taiga landscapes to move up to high-mountainous regions. The features of the landscape structure and diversity of the ridge are noted, which, along with the specific spatial organization of vegetation and relief, can be of key importance for environmental monitoring and the study of regional variability of climatic changes.

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Small scale landscape mapping of traditional land use territories in Republic of Sakha (Yakutia)

Zakharov,

Filippova,

Savvinova

et al. 2023

ICIGIS

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In the Republic of Sakha (Yakutia), there are 63 territories of traditional land use of the Indigenous Minorities of the North within the boundaries of municipal districts and nasleg (lowest municipal division), as well as nomadic tribal communities. Almost 58 % of the republic’s territory is under the traditional land use status. The traditional use of natural resources and traditional lifestyles of indigenous peoples are inextricably linked to the resource potential and ecological state of natural landscapes. The paper is aimed to develop a standardized methodology for the design of a small-scale landscape map of traditional land use in the Republic of Sakha (Yakutia). Based on the review of atlas approaches to landscape structure mapping of protected natural areas, we propose to use a multi-thematic dataset of geospatial layers according to the criteria of the classification of typological, regional and basin categories of landscapes. The dataset includes layers from previously published landscape maps and permafrost-landscape regionalization maps, soil-vegetation maps, and global geospatial data for Hammond relief regions, GMTED2010 digital elevation model and HydroBASINS river basins. Methods for delineation of mapped units include overlay geoprocessing, zonal statistics, and relief analysis. For the basemap, the description of typological landscape units includes landscape subclass-genus-type(subtype) and terrain type. The methodology was tested for the Ust-Maiskij district with predominance of mountain taiga and mid-taiga landscapes and Eveno-Bytantaiskij national district with predominance of mountain-tundra, mountain-woodland and north taiga landscapes. The obtained landscape maps contain 36 typological units that synthesize 6 subclasses, 7 landscape types (subtypes) and 12 terrain types by 5 landscape provinces and large river basins (Lena, Yana, Omoloi and Aldan). Thus, the proposed landscape mapping methodology covers the holistic spatial structure of the leading components, allowing for a multidimensional approach to territorial planning and functional zoning of traditional land use.

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Landscape Structure Analysis of the Orulgan Ridge Eastern Slope

Cited by 4 publications

References 2 publications

Mountain permafrost landscape changes assessment by archive Landsat data using the principal component analysis

Mountain permafrost landscape changes assessment by archive Landsat data using the principal component analysis

Distribution and Structure Analysis of Mountain Permafrost Landscape in Orulgan Ridge (Northeast Siberia) Using Google Earth Engine

Small scale landscape mapping of traditional land use territories in Republic of Sakha (Yakutia)

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