Sea ice melt pond bathymetry reconstructed from aerial photographs using photogrammetry: A new method applied to MOSAiC data DOI Creative Commons
Niels Fuchs, Luisa von Albedyll, Gerit Birnbaum

et al.

Published: Dec. 12, 2023

Abstract. Melt ponds are a core component of the summer sea ice system in Arctic, increasing uptake solar energy and impacting ice-associated ecosystem. They were thus one key topics during one-year drift campaign MOSAiC Transpolar Drift 2019/2020. Pond depth is dominating factor description surface meltwater volume, necessary to estimate budgets, used model parametrization simulate pond coverage evolution. However, observational data on spatially temporally strongly limited few situ measurements. bathymetry, which fully resolved, remains entirely unexplored. Here, we present newly developed method derive bathymetry from aerial images. We determine it photogrammetric multi-view reconstruction topography. Based images recorded dedicated grid flights facilitated assumptions, able obtain with mean deviation 3.5 cm compared manual observations. The independent color sky conditions, an advantage over recently radiometric airborne retrieval methods. It can furthermore be implemented any typical photogrammetry workflow. algorithm, including requirements for recording survey planning, correction refraction at air—pond interface. In addition, show how retrieved topography synergizes initial image retrieve water level individual visually determined margins. use give profound overview floe, found unexpected steady volume. properties more than 1600 their size, elevation above level, temporal scaling single measurements, discuss representativeness indications non-rigid bottoms. study points out great potential geometric sea-ice emerging increasingly available visual UAVs or aircraft, allowing integrated understanding improved formulation thermodynamic hydrological models.

Language: Английский

Thin and transient meltwater layers and false bottoms in the Arctic sea ice pack—Recent insights on these historically overlooked features DOI Creative Commons
Madison Smith, Hélène Angot, Emelia J. Chamberlain

et al.

Elementa Science of the Anthropocene, Journal Year: 2023, Volume and Issue: 11(1)

Published: Jan. 1, 2023

The rapid melt of snow and sea ice during the Arctic summer provides a significant source low-salinity meltwater to surface ocean on local scale. accumulation this on, under, around floes can result in relatively thin layers upper ocean. Due small-scale nature these upper-ocean features, typically order 1 m thick or less, they are rarely detected by standard methods, but nevertheless pervasive critically important summer. Observations Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition 2020 focused evolution such made advancements understanding their role coupled system. Here we provide review Arctic, with emphasis new findings from MOSAiC. Both prior recent observational datasets indicate an intermittent yet long-lasting (weeks months) layer 0.1 1.0 thickness, large spatial range. presence impacts physical system reducing bottom allowing formation via false growth. Collectively, bottoms reduce atmosphere-ocean exchanges momentum, energy, material. far-reaching, including acting as barrier nutrient gas exchange impacting ecosystem diversity productivity.

Language: Английский

Citations

34
Surface Energy Balance Responses to Radiative Forcing in the Central Arctic From MOSAiC and Models DOI Creative Commons
Anne Sledd, Matthew D. Shupe, Amy Solomon

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(6)

Published: March 10, 2025

Abstract The Arctic surface energy budget (SEB) couples the atmosphere with sea ice, making it useful for both studying processes as well evaluating models. Improved understanding of atmosphere‐ice interactions is required to improve models, requiring year‐round observations address seasonally dependent biases. This work uses novel from MOSAiC expedition quantify responses fluxes radiative forcing over ice throughout a complete annual cycle. We identify two primary regimes flux response: an growth regime in winter and melt summer. In regime, changes impact upwelling longwave, sensible heat, subsurface heat fluxes, whereas primarily alter amount transmission because temperature fixed. These observed are used evaluate seven weather forecast models during regime. most do not match observations. Many also have biased downwelling longwave. One model (the Coupled Forecast System; CAFS) adequately captures mean winter. CAFS further evaluated against spanning full year, demonstrating sufficient agreement provide more generalized these SEB process relationships across Arctic.

Language: Английский

Citations

1
Sea ice melt pond bathymetry reconstructed from aerial photographs using photogrammetry: a new method applied to MOSAiC data DOI Creative Commons
Niels Fuchs, Luisa von Albedyll, Gerit Birnbaum

et al.

˜The œcryosphere, Journal Year: 2024, Volume and Issue: 18(7), P. 2991 - 3015

Published: July 2, 2024

Abstract. Melt ponds are a core component of the summer sea ice system in Arctic, increasing uptake solar energy and impacting ice-associated ecosystem. They were thus one key topics during 1-year drift campaign Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) Transpolar Drift 2019/2020. Pond depth is dominating factor describing surface meltwater volume; it necessary to estimate budgets used model parameterization simulate pond coverage evolution. However, observational data on spatially temporally strongly limited few situ measurements. bathymetry, which fully resolved, remains unexplored. Here, we present newly developed method derive bathymetry from aerial images. We determine photogrammetric multi-view reconstruction topography. Based images recorded dedicated grid flights facilitated assumptions, able obtain with mean deviation 3.5 cm compared manual observations. The independent color sky conditions, an advantage over recently radiometric airborne retrieval methods. It can furthermore be implemented any typical photogrammetry workflow. algorithm, including requirements recording survey planning, correction refraction at air–pond interface. In addition, show how retrieved topography synergizes initial image retrieve water level individual visually determined margins. use give profound overview MOSAiC floe, found unexpected steady volume. properties more than 1600 their size, volume, elevation above level, temporal scaling single measurements, discuss representativeness measurements importance such high-resolution new satellite retrievals, indications non-rigid bottoms. study points out great potential geometric emerging increasingly available visual uncrewed vehicles (UAVs) or aircraft, allowing integrated understanding improved formulation thermodynamic hydrological models.

Language: Английский

Citations

5
Seasonality of spectral radiative fluxes and optical properties of Arctic sea ice during the spring–summer transition DOI Creative Commons
Ran Tao, Marcel Nicolaus, Christian Katlein

et al.

Elementa Science of the Anthropocene, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

The reflection, absorption, and transmittance of shortwave solar radiation by sea ice play crucial roles in physical biological processes the ice-covered Arctic Ocean atmosphere. These sea-ice optical properties, particularly during melt season, significantly impact energy fluxes within total budget coupled atmosphere-ice-ocean system. We analyzed data from autonomous drifting stations to investigate seasonal evolution spectral albedo, transmittance, absorptivity for different sea-ice, snow, surface conditions measured MOSAiC expedition 2019–2020. spatial variability these properties was small spring increased strongly after onset on May 26, 2020, when liquid water content increased, largely accounting enhanced variability. temporal albedo mostly event-driven, thus containing episodic elements. Melt ponds reduced local 31%–45%. Over melting single ponding events deposition 35% compared adjacent bare ice. Thus, may summer as much over 1 month. Absorptivity showed strong variabilities independently conditions, possibly due internal under-ice processes. differences shown impacted partitioning radiation. This study shows that formation development ponds, reducing a third sites, can notably increase heat deposition. vastly evolutions, timing duration need be considered comparing in-situ observations with large-scale satellite remote sensing datasets, which we suggest help improve numerical models.

Language: Английский

Citations

4
Predicting Melt Pond Coverage on Arctic Sea Ice From Pre‐Melt Surface Topography DOI Creative Commons
Niels Fuchs, Gerit Birnbaum, Niklas Neckel

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(9)

Published: May 8, 2025

Abstract Sea‐ice melt ponds form in the depressions of pre‐melt surface topography, a process widely accepted yet lacking larger‐scale evaluation through explicit comparisons. During MOSAiC, we collected multi‐dimensional aerial data to examine relationship between topography and pond evolution across an entire Arctic ice floe. Using hydrological models, analyze correlation potential meltwater accumulation areas identified winter spring topographies, available meltwater, observed coverage. Our findings demonstrate strong connection, revealing 72% accuracy matching low ponds, with 98% basins deeper than 0.5 m transforming into ponds. Incorporating assumptions regarding availability improve predictions fraction highlight key factors driving extensive lateral runoff networks on No significant differences are first‐ second‐year ice. This study provides valuable ground truth for future modeling measurements formation.

Language: Английский

Citations

0
Exploring the frozen frontier: unmanned aerial vehicles and multispectral sensors unveiling cryosphere dynamics in East Antarctica’s Dronning Maud Land DOI Creative Commons

M. Geetha Priya,

Krishna Venkatesh

GIScience & Remote Sensing, Journal Year: 2024, Volume and Issue: 61(1)

Published: Jan. 10, 2024

In this study, we investigated specific components and intra-seasonal dynamic processes that play pivotal roles in the East Antarctica's central Dronning Maud Land (cDML) region. The present study focuses on harnessing potential of a multispectral sensor-based Unmanned Aerial Vehicle (UAV) for cryosphere studies over polar ice sheet cDML (Schirmacher Oasis) region Antarctica, conducted as part 42nd 43rd Indian Scientific Expedition to Antarctica (ISEA), under aegis National Centre Polar Ocean Research (NCPOR), Ministry Earth Sciences, Government India, during austral summer period from 2022 2023. surveyed area (~100 acres) encompasses segment frontal edge outer margin, situated near Maitri research base at Schirmacheroasen, includes melt pond/supraglacial lake. results indicate experienced decrease elevation 0.25 meters with total mass reduction 13.6 kilotons one-week period. supraglacial lake accumulated meltwater an average depth ranging 1.6 meters, covering spanning 9.1 × 103 square 24.7 meters. ultra-high resolution UAV data also revealed changes various cryo-facies classes, including water bodies/meltwater, frozen meltwater, dry wet snow, debris/bare ice, bedrock area. This represents pioneering effort assessing both spatial temporal scales. It marks first application surveying techniques integration in-situ Pressure Sensor Assembly (PSA) examine understand its complex dynamics characteristics. team is group employ UAVs scientific Antarctic region, which notable advancement exploration contributes expanding knowledge

Language: Английский

Citations

1
MODELING HEAT TRANSFER DURING SOLAR-INDUCED MELTING OF LAKE AND SEA ICE DOI
Leonid A. Dombrovsky

Computational Thermal Sciences An International Journal, Journal Year: 2024, Volume and Issue: 16(6), P. 21 - 43

Published: Jan. 1, 2024

Solar heating and ice melting on the water surface is an important geophysical problem that has attracted attention of researchers for many years. It essential in connection with global climate change our planet. A simple sufficiently accurate physical model process proposed, combining analytical solutions solar radiation transfer light-scattering snow cover layer numerical calculations transient heat a multilayer system. The boundary conditions consider convective losses to cold air radiative cooling open mid-infrared window transparency cloudless atmosphere. Much paid modeling anomalous spring covering large high-mountain lakes Tibet, Earth's third pole. was found thick not covered starts melt at ice-water interface due volumetric ice. results are good agreement field observations. computational analysis shows dramatic when snow. qualitative picture occurs thickness increases 20-30 cm. In this case, precedes ponds formed ice's surface. This typical situation Arctic Sea during polar summer. Known experimental data used estimate sea under pond. Positive or negative feedback related specific optical thermal properties snow, ice, discussed.

Language: Английский

Citations

1
Mapping Italian high-altitude ponds DOI
Davide Taurozzi, Massimiliano Scalici

Environmental Management, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 8, 2024

Language: Английский

Citations

1
Relationship of physical and mechanical properties of sea ice during the freeze-up season in Nansen Basin DOI Creative Commons

Vegard Hornnes,

Evgenii Salganik, Knut V. Høyland

et al.

Cold Regions Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 104353 - 104353

Published: Oct. 1, 2024

Language: Английский

Citations

1
Comment on egusphere-2023-2859 DOI Creative Commons

Dmitry Divine

Published: Jan. 25, 2024

Abstract. Melt ponds are a core component of the summer sea ice system in Arctic, increasing uptake solar energy and impacting ice-associated ecosystem. They were thus one key topics during one-year drift campaign MOSAiC Transpolar Drift 2019/2020. Pond depth is dominating factor description surface meltwater volume, necessary to estimate budgets, used model parametrization simulate pond coverage evolution. However, observational data on spatially temporally strongly limited few situ measurements. bathymetry, which fully resolved, remains entirely unexplored. Here, we present newly developed method derive bathymetry from aerial images. We determine it photogrammetric multi-view reconstruction topography. Based images recorded dedicated grid flights facilitated assumptions, able obtain with mean deviation 3.5 cm compared manual observations. The independent color sky conditions, an advantage over recently radiometric airborne retrieval methods. It can furthermore be implemented any typical photogrammetry workflow. algorithm, including requirements for recording survey planning, correction refraction at air—pond interface. In addition, show how retrieved topography synergizes initial image retrieve water level individual visually determined margins. use give profound overview floe, found unexpected steady volume. properties more than 1600 their size, elevation above level, temporal scaling single measurements, discuss representativeness indications non-rigid bottoms. study points out great potential geometric sea-ice emerging increasingly available visual UAVs or aircraft, allowing integrated understanding improved formulation thermodynamic hydrological models.

Language: Английский

Citations

0