Photogrammetric monitoring of glacier margin lakes

Mulsow, Christian; Koschitzki, Robert; Maas, Hans‐Gerd

doi:10.1080/19475705.2014.939232

Cited by 4 publications

(2 citation statements)

References 13 publications

(13 reference statements)

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“…On the other hand, in recent years, topics such as the interaction between glacial lakes and climate change, glacial lake water resources management, and glacial lake-related disasters have increased in frequency. Disaster early warning, glacial lake change monitoring and evolution mechanism, glacial lake flood and outburst risk assessment, glacial lake and ecological environment impact, glacial lake disaster prevention and risk management urgently need to carry out in-depth and detailed research (Mulsow et al, 2015;Viani et al, 2022).…”

Section: Data Sourcesmentioning

confidence: 99%

Three decades of glacial lake research: a bibliometric and visual analysis of glacial lake identification

Liu,

Yang,

et al. 2023

Front. Ecol. Evol.

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IntroductionAs a vital component within glacier systems, the occurrences of glacial lake disasters in high mountain regions have progressively emerged as one of the most destructive natural calamities amid the backdrop of global warming. The swift advancement of glacial lake identification techniques offers a pivotal perspective for forecasting and mitigating the perils of glacial lake outburst disasters.MethodsTo evaluate the thematic evolution, research focal points, and forthcoming directions within the glacier identification domain, a comprehensive bibliometric analysis was conducted on glacial lake identification-related literature from 1991 to 2023 in the Web of Science Core Collection database.Results1) The United States, the United Kingdom, and China stand as principal nations propelling the field's advancement. The Chinese Academy of Sciences demonstrates the highest activity in terms of article publications and international collaborations. 2) Climate change, compilation of glacial lake inventories, methodologies for risk assessment, glacial lake outburst floods, comprehensive disaster management strategies, and hydrodynamic models constitute the domain's research hotspots. It is a typical multidisciplinary field. 3) Persistently high-impact topics over an extended period include “hazard”, “Late Pleistocene”, “environmental change”, “ice sheet”, and “lake sediments”. Keywords indicating the present cutting-edge research encompass “inventory”, “glacial lake outburst flood”, “risk”, “dynamics”, “Tibetan Plateau”, “evolution”, and “high mountain Asia”.DiscussionThis paper delves into the current status and pivotal concerns of glacial lake identification techniques, methodologies, and the scale of identification research themes. Further Research should concentrate on avenues like “recognition methods grounded in machine learning and deep learning”, “multisource data fusion datasets”, “novel algorithms and technologies adaptable to scale transformation and data expansion”, as well as “enhancing spatiotemporal data resolution”. This will ultimately enable precise, prolonged, and multiscalar identification of glacial lakes. his study provides valuable guidance and reference for future research in the field of glacial lake identification.

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Section: Data Sourcesmentioning

confidence: 99%

Three decades of glacial lake research: a bibliometric and visual analysis of glacial lake identification

Liu,

Yang,

et al. 2023

Front. Ecol. Evol.

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“…Matsuoka et al (2014) conducted a 5-year investigation with time-lapse images to observe soil movement due to frost creep and heave on alpine slopes, taking images every 4 h. To monitor and analyse large wood loads in rivers, Kramer and Wohl (2014) recorded images every minute and manually analysed them regarding the presence or absence of wood. Nichols et al (2016) used time-lapse images to qualify gully erosion. They identified the subsurface erosion as a cause for gully headwall retreat.…”

Section: Introductionmentioning

confidence: 99%

Determination of high resolution spatio-temporal glacier motion fields from time-lapse sequences

Schwalbe¹,

Maas²

2017

Preprint

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Abstract. This paper presents a comprehensive method for the determination of motion vector fields of glaciers at high spatial and temporal resolution. These vector fields can be derived from monocular terrestrial camera image sequences and are a valuable data source for glaciological analysis of the motion behaviour of glaciers. The measurement concepts for the acquisition of image sequences are presented, and an automated monoscopic image sequence processing chain is developed. Motion vector fields can be derived with high precision by applying automatic sub-pixel-accuracy image matching techniques on grey value patterns in the image sequences. Well-established matching techniques have been adapted to the special characteristics of the glacier data in order to achieve high reliability in automatic image sequence processing, including the handling of moving shadows as well as motion effects induced by small instabilities in the camera setup. Suitable geo-referencing techniques were developed to transform image measurements into a reference coordinate system. The result of the monoscopic image sequence analysis is a dense raster of glacier surface point trajectories for each image sequence. Each translation vector component in these trajectories can be determined with an accuracy of some centimetres for points at a distance of several kilometres from the camera. Extensive practical validation experiments show that motion vector and trajectory fields derived from monocular image sequences can be used for the determination of high resolution velocity fields of glaciers, for the analysis of the effects of tides on glacier movement, for the investigation of a glacier's motion behaviour during calving events, for the determination of the position and migration of the grounding line and for the detection of sub glacial channels during glacier lake outburst floods.

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The determination of high-resolution spatio-temporal glacier motion fields from time-lapse sequences

Schwalbe

Maas

2017

Earth Surf. Dynam.

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Abstract. This paper presents a comprehensive method for the determination of glacier surface motion vector fields at high spatial and temporal resolution. These vector fields can be derived from monocular terrestrial camera image sequences and are a valuable data source for glaciological analysis of the motion behaviour of glaciers. The measurement concepts for the acquisition of image sequences are presented, and an automated monoscopic image sequence processing chain is developed. Motion vector fields can be derived with high precision by applying automatic subpixel-accuracy image matching techniques on grey value patterns in the image sequences. Well-established matching techniques have been adapted to the special characteristics of the glacier data in order to achieve high reliability in automatic image sequence processing, including the handling of moving shadows as well as motion effects induced by small instabilities in the camera set-up. Suitable geo-referencing techniques were developed to transform image measurements into a reference coordinate system.The result of monoscopic image sequence analysis is a dense raster of glacier surface point trajectories for each image sequence. Each translation vector component in these trajectories can be determined with an accuracy of a few centimetres for points at a distance of several kilometres from the camera. Extensive practical validation experiments have shown that motion vector and trajectory fields derived from monocular image sequences can be used for the determination of high-resolution velocity fields of glaciers, including the analysis of tidal effects on glacier movement, the investigation of a glacier's motion behaviour during calving events, the determination of the position and migration of the grounding line and the detection of subglacial channels during glacier lake outburst floods.

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Photogrammetric monitoring of glacier margin lakes

Cited by 4 publications

References 13 publications

Three decades of glacial lake research: a bibliometric and visual analysis of glacial lake identification

Three decades of glacial lake research: a bibliometric and visual analysis of glacial lake identification

Determination of high resolution spatio-temporal glacier motion fields from time-lapse sequences

The determination of high-resolution spatio-temporal glacier motion fields from time-lapse sequences

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