Comment on egusphere-2024-1977 DOI Creative Commons

Cathleen Geiger

Опубликована: Июль 31, 2024

Abstract. The melt of snow and sea ice during the Arctic summer is a significant source relatively fresh meltwater in central Arctic. fate this freshwater – whether surface ponds, or thin layers underneath leads impacts atmosphere-ice-ocean interactions their subsequent coupled evolution. Here, we combine analyses datasets from Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition (June–July, 2020) to understand key drivers budget Central water over time. Freshwater suggest that high fraction (58 %) derived melt. Additionally, contribution stored precipitation (snowmelt) significantly outweighs by five times input situ (rain). magnitude rate local production are remarkably similar observed on prior Surface Heat Budget Ocean (SHEBA) campaign. A small (10 remains which higher more deformed second-year compared first-year later summer. Most drains via lateral vertical drainage channels, with enabling storage internally freshening brine channels. In upper ocean, can accumulate transient order 10 cm 1 m thick under ice. presence such substantially system reducing bottom allowing false growth, heat, nutrient gas exchange, influencing ecosystem productivity. Regardless, majority inferred be ultimately incorporated into ocean (75 (14 %). Comparison sink terms estimates CESM2 climate model simulated ponds dramatically underestimated. This suggests pond should investigated as likely explanation.

Язык: Английский

Formation and fate of freshwater on an ice floe in the Central Arctic DOI Creative Commons
Madison Smith, Niels Fuchs, Evgenii Salganik

и другие.

˜The œcryosphere, Год журнала: 2025, Номер 19(2), С. 619 - 644

Опубликована: Фев. 7, 2025

Abstract. The melt of snow and sea ice during the Arctic summer is a significant source relatively fresh meltwater. fate this freshwater, whether in surface ponds or thin layers underneath leads, impacts atmosphere–ice–ocean interactions their subsequent coupled evolution. Here, we combine analyses datasets from Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition (June–July 2020) process study on formation freshwater floes Central Arctic. Our budget suggest that high fraction (58 %) derived melt. Additionally, contribution stored precipitation (snowmelt) outweighs by 5 times input situ (rain). magnitude rate local meltwater production are remarkably similar to those observed prior Surface Heat Budget Ocean (SHEBA) campaign, where cumulative totaled around 1 m both. A small (10 remains ponds, which higher more deformed second-year (SYI) compared first-year (FYI) later summer. Most drains laterally vertically, with vertical drainage enabling storage internally freshening brine channels. In upper ocean, can accumulate transient order 0.1 thick leads under ice. presence such substantially system reducing bottom allowing false growth; heat, nutrient, gas exchange; influencing ecosystem productivity. Regardless, majority inferred be ultimately incorporated into ocean (75 (14 %). Terms as annual could used future work diagnostics global climate models. For example, range values CESM2 model roughly encapsulate total production, while underestimated about 50 %, suggesting pond terms key investigation.

Язык: Английский

Процитировано

1
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

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2025, Номер 130(6)

Опубликована: Март 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.

Язык: Английский

Процитировано

1
Under-ice environment observations from a remotely operated vehicle during the MOSAiC expedition DOI Creative Commons
Philipp Anhaus, Christian Katlein, Stefanie Arndt

и другие.

Scientific Data, Год журнала: 2025, Номер 12(1)

Опубликована: Июнь 5, 2025

Язык: Английский

Процитировано

0
Formation and fate of freshwater on an ice floe in the Central Arctic DOI Creative Commons
Madison Smith, Niels Fuchs, Evgenii Salganik

и другие.

Опубликована: Июль 9, 2024

Abstract. The melt of snow and sea ice during the Arctic summer is a significant source relatively fresh meltwater in central Arctic. fate this freshwater – whether surface ponds, or thin layers underneath leads impacts atmosphere-ice-ocean interactions their subsequent coupled evolution. Here, we combine analyses datasets from Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition (June–July, 2020) to understand key drivers budget Central water over time. Freshwater suggest that high fraction (58 %) derived melt. Additionally, contribution stored precipitation (snowmelt) significantly outweighs by five times input situ (rain). magnitude rate local production are remarkably similar observed on prior Surface Heat Budget Ocean (SHEBA) campaign. A small (10 remains which higher more deformed second-year compared first-year later summer. Most drains via lateral vertical drainage channels, with enabling storage internally freshening brine channels. In upper ocean, can accumulate transient order 10 cm 1 m thick under ice. presence such substantially system reducing bottom allowing false growth, heat, nutrient gas exchange, influencing ecosystem productivity. Regardless, majority inferred be ultimately incorporated into ocean (75 (14 %). Comparison sink terms estimates CESM2 climate model simulated ponds dramatically underestimated. This suggests pond should investigated as likely explanation.

Язык: Английский

Процитировано

0
Comment on egusphere-2024-1977 DOI Creative Commons

Cathleen Geiger

Опубликована: Июль 31, 2024

Abstract. The melt of snow and sea ice during the Arctic summer is a significant source relatively fresh meltwater in central Arctic. fate this freshwater – whether surface ponds, or thin layers underneath leads impacts atmosphere-ice-ocean interactions their subsequent coupled evolution. Here, we combine analyses datasets from Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition (June–July, 2020) to understand key drivers budget Central water over time. Freshwater suggest that high fraction (58 %) derived melt. Additionally, contribution stored precipitation (snowmelt) significantly outweighs by five times input situ (rain). magnitude rate local production are remarkably similar observed on prior Surface Heat Budget Ocean (SHEBA) campaign. A small (10 remains which higher more deformed second-year compared first-year later summer. Most drains via lateral vertical drainage channels, with enabling storage internally freshening brine channels. In upper ocean, can accumulate transient order 10 cm 1 m thick under ice. presence such substantially system reducing bottom allowing false growth, heat, nutrient gas exchange, influencing ecosystem productivity. Regardless, majority inferred be ultimately incorporated into ocean (75 (14 %). Comparison sink terms estimates CESM2 climate model simulated ponds dramatically underestimated. This suggests pond should investigated as likely explanation.

Язык: Английский

Процитировано

0