Sea ice volume variability and water temperature in the Greenland Sea

Selyuzhenok, Valeria; Bashmachnikov, Igor; Ricker, Robert; Vesman, Anna; Bobylev, Leonid

doi:10.5194/tc-14-477-2020

Cited by 36 publications

(32 citation statements)

References 86 publications

(153 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since 2010, the number of eddies (but not their azimuthal velocity) has a tendency to increase in time, while eddy radii to decrease in time (correlation coefficient is −0.55). The intensification of the WSC since 2010 ( Figure 13d) goes in parallel with the growth of the winter North Atlantic Oscillation Index (Selyuzhenok et al, 2020;Yashayaev & Seidov, 2015), the link derived in previous model studies (Chatterjee et al, 2018; Figure 14. The composite maps of the weekly winter (December-February) wind fields for the weeks with (a) high winter EKE and the years with (b) low winter EKE in the WSC region.…”

Section: 1029/2019jc015832supporting

confidence: 75%

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

et al. 2020

View full text Add to dashboard Cite

In this study, we investigate eddy dynamics in the northern Greenland Sea and the Fram Strait using AVISO altimetry, spaceborne synthetic aperture radar (SAR), and Finite Element Sea ice‐Ocean Model (FESOM) high‐resolution numerical model data. In the region, eddies are thought to play an important role in the redistribution of the warmer and saltier Atlantic Water between the Arctic Ocean and the areas of deep convection in the central Greenland Sea. We found that eddies detected in AVISO and in SAR form two complementary data sets of large mesoscale eddies (with typical radii of 30–50 km) and of small mesoscale/submesoscale eddies (with typical radii of 1–5 km and not exceeding 30 km), respectively. For large mesoscale eddies, the number of cyclones and anticyclones is approximately the same, while for submesoscale eddies, cyclones are strongly dominating. The limitations and possible biases in each of the data sets are discussed and cross‐validated against FESOM results. It is noted that the most energetic eddies are concentrated along the major currents and in the northern part of the region. Eddy translations follow the mean currents in their overall cyclonic circulation around the northern Greenland Sea. A convergence of the eddies toward the Nordbukta area is detected. On seasonal time scale, a higher number of more intense mesoscale eddies is observed during winter, associated with a quasi‐simultaneous intensification of the mean currents. Model results also show an increase in the number of small eddies in spring‐early summer attributed to the decay of large eddies, while in late autumn, the opposite tendency suggests eddy merger.

show abstract

Section: 1029/2019jc015832supporting

confidence: 75%

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

et al. 2020

View full text Add to dashboard Cite

show abstract

“…3, 4 is not strongly dependent on the amount of ice imported through FS but rather on the dynamics of the ice export in this region. However, recent finding suggests a strong dependence of sea ice on the oceanic conditions in this region (Selyuzhenok et al 2020). Various oceanic influences on the GS sea ice are also described in previous studies (e.g.…”

Section: Resultsmentioning

confidence: 94%

“…This indicates the importance of oceanic parameters in central GS sea ice variability. Selyuzhenok et al (2020) recently showed that the winter time sea ice volume in the GS varies in opposite phase to FS sea ice volume export, indicating a contrasting response between sea ice in the western GS, influenced by sea ice export from FS, and central GS where oceanic conditions are important to determine the sea ice condition. The oceanic conditions in the central GS can be influenced by the recirculation of the warm and saline AW from the FS (Hattermann et al 2016, Chatterjee et al 2018.…”

Section: Introductionmentioning

confidence: 99%

The impact of atmospheric and oceanic circulations on the Greenland Sea iceconcentration

Chatterjee

Raj

Bertino

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. The amount and spatial extent of Greenland Sea (GS) sea ice are primarily driven by the sea ice export across the Fram Strait (FS) and by local seasonal sea ice formation, melting and sea ice dynamics. Maximum sea ice concentration (SIC) variability is found in the marginal ice zone and ‘Odden’ region in the central GS. In this study, using satellite passive microwave sea ice observations, atmospheric and a coupled ocean-sea ice reanalysis system we show that both the atmospheric and oceanic circulation in the GS act in tandem to explain the SIC variability in the GS. Anomalous low/high sea level pressure (SLP) over the Nordic Seas is found to strengthen/weaken the Greenland Sea Gyre (GSG) circulation. The large-scale atmospheric circulation pattern associated with this GSG variability features North Atlantic Oscillation (NAO) like SLP pattern with its northern center of action shifted north-eastward from its canonical position. During anomalous low SLP periods, northerly wind anomalies reduce the sea ice export in the central GS due to westward Ekman drift of sea ice. This in turn decreases the freshwater content and weakens ocean stratification in the central GS. At the same time, the associated positive wind stress curl anomaly strengthens the GSG circulation which recirculates warm and saline Atlantic water (AW) into this region. Under a weakly stratified condition, the subsurface AW anomalies can reach the surface to inhibit new sea ice formation, further reducing the SIC in the central GS. Thus, this study highlights combined influence of atmospheric and oceanic circulation in the central GS SIC variability.

show abstract

“…These regions have exhibited strong-negative-SIC trends during recent decades (Rogers and Hung, 2008; see also Fig. 1a in Selyuzhenok et al, 2020). Changes in sea ice of this region can modify the deep water convection through influencing both the heat and salt budgets (Shuchman et al, 1998).…”

Section: Introductionmentioning

confidence: 97%

“…Anomalous sea ice export through the FS is associated with events like the "Great Salinity Anomaly" (Dickson et al, 1988) which can have impact on the freshwater content in the Nordic Seas. Therefore, it is quite evident that the changes in sea ice export through the FS influence the GS sea ice and thus the freshwater availability in the Nordic Seas (Belkin et al, 1998;Dickson et al, 1988;Serreze et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Combined influence of oceanic and atmospheric circulations on Greenland sea ice concentration

et al. 2021

View full text Add to dashboard Cite

Abstract. The amount and spatial extent of Greenland Sea (GS) ice are primarily controlled by the sea ice export across the Fram Strait (FS) and by local seasonal sea ice formation, melting, and sea ice dynamics. In this study, using satellite passive microwave sea ice observations, atmospheric and a coupled ocean-sea ice reanalysis system, TOPAZ4, we show that both the atmospheric and oceanic circulation in the Nordic Seas (NS) act in tandem to explain the SIC variability in the south-western GS. Northerly wind anomalies associated with anomalously low sea level pressure (SLP) over the NS reduce the sea ice export in the south-western GS due to westward Ekman drift of sea ice. On the other hand, the positive wind stress curl strengthens the cyclonic Greenland Sea Gyre (GSG) circulation in the central GS. An intensified GSG circulation may result in stronger Ekman divergence of surface cold and fresh waters away from the south-western GS. Both of these processes can reduce the freshwater content and weaken the upper-ocean stratification in the south-western GS. At the same time, warm and saline Atlantic Water (AW) anomalies are recirculated from the FS region to the south-western GS by a stronger GSG circulation. Under weakly stratified conditions, enhanced vertical mixing of these subsurface AW anomalies can warm the surface waters and inhibit new sea ice formation, further reducing the SIC in the south-western GS.

show abstract

Sea ice volume variability and water temperature in the Greenland Sea

Cited by 36 publications

References 86 publications

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

Eddies in the North Greenland Sea and Fram Strait From Satellite Altimetry, SAR and High‐Resolution Model Data

The impact of atmospheric and oceanic circulations on the Greenland Sea iceconcentration

Combined influence of oceanic and atmospheric circulations on Greenland sea ice concentration

Contact Info

Product

Resources

About