Satellite-derived sea ice export and its impact on Arctic ice mass balance

Ricker, Robert; Girard-Ardhuin, Fanny; Krumpen, Thomas; Lique, Camille

doi:10.5194/tc-12-3017-2018

Cited by 63 publications

(108 citation statements)

References 41 publications

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“…Although the thermodynamic ice melting processes have greatly contributed to the changes in Arctic sea ice, dynamic ice export out of the Arctic Ocean has also been identified as a key contributing factor (Kwok 2009;Smedsrud et al 2011;Langehaug et al 2013), in particular for multiyear ice loss (Ricker et al 2018). According to previous studies, the southward sea ice export across Fram Strait (the location is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…According to previous studies, the southward sea ice export across Fram Strait (the location is shown in Fig. 1) into the Greenland-Iceland-Norwegian (GIN) Sea (or Nordic Seas), which amounts to 2000-3000 km 3 per year Spreen et al 2009), comprises the largest portion of the total Arctic sea ice export (e.g., Carmack et al 2016;Ricker et al 2018). Part of this considerable amount of freshwater has been found flowing along the East Greenland Current into the Nordic Seas, which is closely related to the freshening of Greenland and Labrador Sea (Dickson et al 1988;Holland et al 2006;Koenigk et al 2006), and thus has huge impact on the global ocean circulation.…”

Section: Introductionmentioning

confidence: 99%

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Reexamination of Fram Strait sea ice export and its role in recently accelerated Arctic sea ice retreat

2019

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Using the high-resolution global ocean-sea ice model MITgcm-ECCO2, variability and changes of Arctic sea ice export through Fram Strait during 1979-2012 are examined. The simulated annual mean ice export is about 3216 km 3 /year, which is 12.7% of the 34-year averaged Arctic sea ice volume, with the maximum and minimum occurring in 1994/95 and 1984/1985 ice export is much more than summer (April-September) and exhibits a greater interannual variation. This study suggests that a significant regime shift of Fram Strait ice export from high to low value occurs around the mid-1990s. Further analysis shows that the regime shift of the atmospheric circulation from conventional Arctic Oscillation/North Atlantic Oscillation (AO/NAO) to the dipole-structure Arctic Rapid change Pattern (ARP) plays an important role on the regime shift of ice export. This shift of atmospheric circulation pattern dominates the variability of ice motion and changes the main source region of ice outflow. Combined with the decreased ice thickness and the less ice outflow related to the weakened northerly/northeasterly winds near the strait, sea ice export decreased, eventually generating a regime shift around the mid-1990s. The distinct impact of changes in Fram Strait ice export on the Arctic sea ice inside the basin before and after mid-1990s indicates that the recent continuing loss of Arctic sea ice was mainly induced by the accelerated ice melting in the Arctic Ocean, rather than the ice outflow through Fram Strait.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reexamination of Fram Strait sea ice export and its role in recently accelerated Arctic sea ice retreat

2019

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“…The sea ice volume flux through the Fram Strait was calculated as a product of monthly average sea ice thickness, area of the grid cell and the sea ice drift velocity (Ricker et al, 2018). Note, that the PIOMAS sea ice thickness represents the mean (Fig.…”

Section: Fram Strait and Denmark Strait Sea Ice Volume Flux From Piomasmentioning

confidence: 99%

“…The total ice volume flux through the Fram Strait was derived for the period from 1979 to 2017 for each months. A similar methodology was used to assess the sea ice volume flux though the Denmark strait along the meridional section (66 • N and Ricker et al (2018). The gate and the methodology used here was adopted from Ricker et al (2018), while in other two studies somewhat different methodologies and gates locations ( Fig.…”

Section: Fram Strait and Denmark Strait Sea Ice Volume Flux From Piomasmentioning

confidence: 99%

Sea ice volume variability and water temperature in the Greenland Sea

Selyuzhenok¹,

Bashmachnikov²,

Ricker³

et al. 2019

Preprint

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Abstract. This study explores a link between the long-term variations in the integral sea ice volume (SIV) in the Greenland Sea and oceanic processes. Using Pan-Arctic Ice Ocean Modelling and Assimilation System (PIOMAS, 1979–2016), we show that the negative tendencies in SIV go in parallel with the increasing ice flux through the Fram Strait. The overall SIV loss in the Greenland Sea comprises 113 km3 per decade, while the total SIV import through the Fram strait is increasing by 115 km3 per decade. An analysis of the ocean temperature and the mixed layer depth (MLD) in the marginal sea ice zone (MIZ), based on ARMOR data-set (1993–2016), revealed doubling of the amount of the upper ocean heat content available for the ice melt in the MIZ. This increase over the 24-year period can solely explain the SIV loss in the Greenland Sea, even when accounting for the increasing SIV flux from the Arctic. The increase in the ocean heat content is found to be linked to an increase in the temperature of the Atlantic water in the Nordic seas, following an increase of ocean heat flux form the subtropical North Atlantic. We argue that the predominantly positive North Atlantic Oscillation (NAO) index during the four recent decades, together with the intensification of the deep convection in the Greenland Sea, are responsible for the overall intensification of the circulation in the Nordic seas, which explains the observed long-term variations of the SIV.

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“…Additional limitations arise from current remote sensing capabilities for studying the complex dynamics at such gates and a mis-match in the spatial resolution of the applied data sources (e.g. Ricker et al 2018). Given the large across-strait variability in seaice type, thickness and motion, SAR-based estimates of the sea-ice motion are possibly the best way to proceed (Smedsrud et al 2017) provided enough in situ data, e.g.…”

Section: Sea Ice Thickness Uncertaintymentioning

confidence: 99%

Essential gaps and uncertainties in the understanding of the roles and functions of Arctic sea ice

Gerland

Barber

Meier

et al. 2019

Environ. Res. Lett.

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While Arctic sea ice is changing, new observation methods are developed and process understanding improves, whereas gaps in observations and understanding evolve. Some previous gaps are filled, while others remain, or come up new. Knowing about the status of observation and knowledge gaps is important for interpreting observation and research results, interpretation and use of key climate indicators, and for research and observation planning. This paper deals with identifying some of the important current gaps connected to Arctic sea ice and related climate indicators, including their role and functions in the sea ice and climate systems. Subtopics that are discussed here include Arctic seaice extent, concentration, and thickness, sea-ice thermodynamics, age and dynamic processes, and biological implications of changing sea ice. Among crucial gaps are few in situ observations during the winter season, limited observational data on snow and ice thickness from the Arctic Basin, and wide gaps in biological rate measurements in or under sea ice. There is a need to develop or improve analyzes and products of remote sensing, especially for new sensors and technology such as remotely operated vehicles. Potential gaps in observations are inevitably associated with interruptions in longterm observational time series due to sensor failure or cuts in observation programmes.

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Satellite-derived sea ice export and its impact on Arctic ice mass balance

Cited by 63 publications

References 41 publications

Reexamination of Fram Strait sea ice export and its role in recently accelerated Arctic sea ice retreat

Reexamination of Fram Strait sea ice export and its role in recently accelerated Arctic sea ice retreat

Sea ice volume variability and water temperature in the Greenland Sea

Essential gaps and uncertainties in the understanding of the roles and functions of Arctic sea ice

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