O. Tutubalina - Academia.edu (original) (raw)

Papers by O. Tutubalina

Information Technologies in Remote Sensing of the Earth - RORSE 2018

Usually, yield prediction requires a significant number of parameters, which are currently imposs... more Usually, yield prediction requires a significant number of parameters, which are currently impossible to obtain using just remote sensing data. Using the SAFY model, we developed a method of above-ground phytomass estimation and yield forecast on the basis of meteorological information, Sentinel 2 MSI imagery and literature data. We tested the method for an experimental maize field in the Lipetsk region of Russia. As a result of our study, we estimated the total above-ground phytomass and yield one and a half months before harvest for the field. The maximum error in determining the yield using the SAFY crop development model, can be tentatively estimated at ± 10 %.

Environmental Research Letters

Arctic surface temperature has increased at approximately twice the global rate over the past few... more Arctic surface temperature has increased at approximately twice the global rate over the past few decades and is also projected to warm most in the 21st century. However, the mechanism of Arctic vegetation response to this warming remains largely uncertain. Here, we analyse variations in the seasonal profiles of MODerate resolution Imaging Spectroradiometer Leaf Area Index (LAI) and ERA-interim cumulative near-Surface Air Temperature (SATΣ) over the northern Russia, north of 60° N for 2000–2019. We find that commonly used broad temporal interval (seasonal) trends cannot fully represent complex interannual variations of the LAI profile over the growing season. A sequence of narrow temporal interval (weekly) LAI trends form an inverted S-shape over the course of the growing season with enhanced green-up and senescence, but balanced during the growing season’s peak. Spatial patterns of weekly LAI trends match with those of weekly SATΣtrends during the green-up, while the drivers of the...

Исследования изменения спектральных характеристик сортов озимой пшеницы в зависимости от степени ... more Исследования изменения спектральных характеристик сортов озимой пшеницы в зависимости от степени инфицирования возбудителями болезней о. Ю. кремнева 1 , о. в. тутубалина 2 , и. и. Середа 2 , р. Ю. данилов 1 , м. в. зимин 2 , а. а. курилов 1

precision farming is the concept of the agricultural land treatment, based on the existence of in... more precision farming is the concept of the agricultural land treatment, based on the existence of inhomogeneities within one field, which require differentiated fertilizing, herbiciding, and other agricultural activities. Introduction of precision farming leads to economic and environmental benefits. To implement such a technology, operational and highly detailed cartographic materials of acceptable accuracy are required. Application of remote sensing data is a method of regular assessment of the crop lands condition on a large area at a time. Hyperspectral data have very high spectral resolution (usually 1-3 nm) and quite a broad spectral range (usually including visible and near-infrared bands) and therefore have an advantage over multispectral ones in terms of identification of materials and their characteristics. This is exactly the purpose of mapping for precision farming needs. Imagery from low-flying aircraft and uAvs ensures high spatial detail.

The paper presents results of assessing radar interferometry as an independent method for mapping... more The paper presents results of assessing radar interferometry as an independent method for mapping changes in lava flow topography. The study region is Tolbachinsky Dol (Kamchatka), where a fissure eruption occurred in 20122013. This research is based on two-pass differential interferometry for processing a series of Radarsat-2 radar images acquired both from the ascending and descending orbits. During interferometric processing the coherence maps were calculated, which can be used as an additional data source for mapping of the properties of active lava flows. We also calculated the values of lava surface displacements, which highlighted the processes of thermal subsidence. As a result, we have defined a list of mapping parameters that can be extracted from interferometric materials, and have created maps of the dynamics of the lava fields topography.

Glacier retreat is accompanied by formation of lakes within glacier moraines. The lakes may produ... more Glacier retreat is accompanied by formation of lakes within glacier moraines. The lakes may produce outburst floods which can transform into destructive debris flows. In the Central Caucasus this hazard has not been sufficiently studied, and the location and size of glacial lakes is not shownon the topographical maps. We have combined field and remote sensing research to study glacial lakes and debris flow initiation zones in periglacial areas. Two case studies are presented. Bashkara lakes in the upperAdyl-SuRiver valley have been subject to detailedmonitoring since 1999. In 2005 their total area reached 93,000 m, and the total volume exceeded 900,000 m. Buildings, bridges and camping sites are in areas endangered by potential debris flows. A second group of 13 glacier lakes was identified in 2005 on the northeastern slopes of Mt. Elbrus. In July 2006 the area of the largest lake reached 89,000 m, and its volume was 550,000 m. On August 11, 2006 the lake produced an outburst flood ...

This study is carried in the Laboratory of Aerospace Methods, Faculty of Geography MSU, within th... more This study is carried in the Laboratory of Aerospace Methods, Faculty of Geography MSU, within the PPS Arctic project, which aims to investigate dynamics of the northern forest boundary in connection with climate change. Images from Landsat satellites available over the last three decades, but their resolution 30 m is not sufficient for clear representation of sparse northern forests. Therefore it is necessary to know what do we have in situ inside the 30x30 m pixel area? We answer this by analysing a very high resolution QuickBird image.

Выполнена оценка изменений рельефа участка Анапской пересыпи по данным воздушного лазерного скани... more Выполнена оценка изменений рельефа участка Анапской пересыпи по данным воздушного лазерного сканирования (2013, 2015) и съёмок с беспилотного летательного аппарата (2019). Приведена автоматизированная методика выделения гребня и нижних границ склонов фронтального дюнного вала (ФДВ) на основе рассчитанных по облакам точек цифровых моделей рельефа и системы поперечных профилей. Анализ построенных карт показывает, что для участков, где ФДВ разбит на фрагменты, характерно выравнивание его фронта и аккумуляция материала вдоль проездов, пересекающих вал. Результаты количественной оценки свидетельствуют, что сальдо перенесённого материала для системы «пляж-ФДВ» на исследуе

ECOLOGY ECONOMY INFORMATICS. GEOINFORMATION TECHNOLOGIES AND SPACE MONITORING, 2020

The article discusses the methods of field instrumental measurements and the use of remote sensin... more The article discusses the methods of field instrumental measurements and the use of remote sensing materials for measuring the leaf area index of vegetation cover, their capabilities and limitations, verified during research in northern forests. The leaf area index LAI is the ratio of the area of leaves (one of their sides) and/or needles of all plants to the soil area occupied by a given ecosystem. LAI is an important parameter that reflects material and energy metabolism in the processes of photosynthesis, respiration, the cycle of carbon and plant nutrients in ecosystems, predicting their growth and productivity. LAI is a key variable functionally related to phytomass production, water cycle and nutrient cycle under specific microclimatic conditions. A reliable estimate of LAI is one of great importance for monitoring and analyzing various biophysical processes in ecosystems; it is a complex indicator that quantitatively reflects the closeness of the tree canopy, the projective c...

International Journal of Remote Sensing, 2020

We consider the relationship between leaf area index (LAI) and normalized difference vegetation i... more We consider the relationship between leaf area index (LAI) and normalized difference vegetation index (NDVI) for green-leaf vegetation from a subarctic study site, specifically to test whether relationships optimized for lower-latitude vegetation can be assumed to hold at higher latitudes. We focus attention particularly on dwarfshrub vegetation, which has received little previous investigation. We have collected hyperspectral measurements of the optical properties (reflectance and absorptance) of single leaves from dwarf shrub and tree species common to northern European Russia, and have developed a simple physical model of the properties of assemblages ('leaf stacks') of these leaves. The model is shown to provide a satisfactory explanation of the effect of varying the number of leaves in a stack on its NDVI, and can be easily adapted to make simple measurements using relatively inexpensive equipment. Our results show that the LAI-NDVI relationship for a vegetation canopy will saturate (approach within 10% of its limiting value) when the LAI reaches a value of around 2 to 3. Values this low are not uncommon in subarctic vegetation. It is also shown that dwarf shrub vegetation may show lower NDVI than trees for the same LAI.

BIO Web of Conferences, 2020

The studies presented in the article were carried out in 2018-2019 on the experimental field of t... more The studies presented in the article were carried out in 2018-2019 on the experimental field of the All-Russian Research Institute of Biological Plant Protection. The aim of the research was to assess the feasibility of diagnosing the early development of major diseases pathogens based on the results of ground-based spectrometry and the use of phytomonitoring technology, taking into account the genotypes of different winter wheat varieties. There were three options of the experimental plots for the research: the 1st – protected against diseases by fungicides, the 2nd – with an artificial infectious background, the 3rd – with the natural development of diseases. According to the results of data analysis, the most significant changes in the spectral characteristics of the studied plant backgrounds were noted at the time of the first signs of disease in the form of a decrease in the spectral brightness coefficient in the near infrared range. Using special tools in the experimental plot...

Science of The Total Environment, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY, 2017

Crops, like other plants, clearly react to various changes in both natural and anthropogenic fact... more Crops, like other plants, clearly react to various changes in both natural and anthropogenic factors (herbicides, pesticides, fertilizers, etc.), which affects the amount of phytomass, its fractional composition, and developmental and physiological state of the plant, and, accordingly, is reflected in the spectral image. Data on spectral characteristics of plants allow users to determine quickly and with a high degree of reliability various indicators of the state of agricultural crops and thus improve the efficiency of agrotechnical practices and the use of land resources and facilitate the implementation of the precision farming concept. Reflective properties of plants (and hence crops) carry a large amount of meaningful information about the species, stage of development, and morpho-physiological state, allowing determination of the interrelations between the spectrometric characteristics and temporal physiological parameters. The paper presents the results of monitoring of the state of winter wheat and corn in experimental fields in southern and central Russia in the spring and summer of 2016.

Abstracts of the ICA, 2019

Izvestiya, Atmospheric and Oceanic Physics, 2017

⎯The tundra-taiga ecotone plays significant role in northern ecosystems. Due to global climatic c... more ⎯The tundra-taiga ecotone plays significant role in northern ecosystems. Due to global climatic changes, the vegetation of the ecotone is the key object of many remote-sensing studies. The interpretation of vegetation and nonvegetation objects of the tundra-taiga ecotone on satellite imageries of a moderate resolution is complicated by the difficulty of extracting these objects from the spectral and spatial mixtures within a pixel. This article describes a method for the subpixel classification of Terra ASTER satellite image for vegetation mapping of the tundra-taiga ecotone in the Tuliok River, Khibiny Mountains, Russia. It was demonstrated that this method allows to determine the position of the boundaries of ecotone objects and their abundance on the basis of quantitative criteria, which provides a more accurate characteristic of ecotone vegetation when compared to the per-pixel approach of automatic imagery interpretation.

Bulletin of Volcanology, 2016

Lahars are highly concentrated, water-saturated volcanic hyperconcentrated flows or debris flows ... more Lahars are highly concentrated, water-saturated volcanic hyperconcentrated flows or debris flows containing pyroclastic material and are a characteristic mass movement process on volcanic slopes. On Kamchatka Peninsula (Russian Federation), lahars are widespread and may affect remote settlements. Historical records of past lahar occurrences are generally sparse and mostly limited to events which damaged infrastructure on the slopes or at the foot of volcanoes. In this study, we present a tree-ring-based reconstruction of spatiotemporal patterns of past lahar activity at Shiveluch volcano. Using increment cores and cross sections from 126 Larix cajanderi trees, we document 34 events covering the period AD 1729-2012. Analyses of the seasonality of damage in trees reveal that 95% of all lahars occurred between October and May and thus point to the predominant role of the sudden melt of the snow cover by volcanic material. These observations suggest that most lahars were likely syn-eruptive and that lahar activity is largely restricted to periods of volcanic activity. By contrast, rainfall events do not seem to play a significant role in lahar triggering.

Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI), 2016

The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of R... more The Anapa bay bar is at present one of only a few sand beaches in the Black Sea coastal zone of Russia. The bay bar includes three main belts-beach, dune belt and hillocky sands. A strong anthropogenic impact is observed: the landscape-morphological structure of the dune belt is disturbed, so monitoring of the bay bar is essential. For this purpose we had compiled a series of maps of landscape-morphological structure for the Blagoveschensk and Vityazevo-Anapa parts of the bay bar using high-resolution images from WorldView-2 satellite. Interpretation of stereo-pairs of multitemporal images was carried out at the scale of 1:2000, while a series of maps was compiled at the scale of 1:5000. Twelve sites with different landscape-morphologic structure are covered by these maps and characterized. The structure depends on geomorphologic neighborhood (adjacency to the cliff or to the lagoon) and aspect to wind direction, but mainly on the degree of anthropogenic influence. So the dune belt has been formed at the beach in some areas, but in other areas the dune belt is located behind the beach, or sometimes has disappeared. The compiled maps clearly reflect these variations and show their mainly anthropogenic origin. These maps will help to investigate adaptive solutions for Anapa bay bar conservation and protection.

Science of The Total Environment, 2016

The observed increase in summer temperatures and the related glacier downwasting has led to a not... more The observed increase in summer temperatures and the related glacier downwasting has led to a noticeable decrease of frozen water resources in Central Asia, with possible future impacts on the economy of all downstream countries in the region. Glaciers in the Ak-Shyirak massif, located in the Inner Tien Shan, are not only affected by climate change, but also impacted by the open pit gold mining of the Kumtor Gold Company. In this study, glacier inventories referring to the years 2003 and 2013 were created for the Ak-Shyirak massif based on satellite imagery. The 193 glaciers had a total area of 351.2±5.6 km 2 in 2013. Compared to 2003, the total glacier area decreased by 5.9±3.4%. During 2003-2013, the shrinkage rate of Ak-Shyirak glaciers was twice than that in 1977-2003 and similar to shrinkage rates in Tien Shan frontier ranges. We assessed glacier volume in 2013 using volume-area (VA) scaling and GlabTop modelling approaches. Resulting values for the whole massif differ strongly, the VA scaling derived volume is 30.0÷26.4 km 3 whereas the GlabTop derived volume accounts for 18.8÷13.2 km 3. Ice losses obtained from both approaches were compared to geodetically-derived