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Sea-ice-loss slowdown modulates the sea surface salinification in the Kara–Laptev Seas since the 2008 summer
Recent studies have revealed the slowed Arctic sea-ice loss, but its climate effect on the ocean system remains unclear. By examining reanalysis datasets, we illustrate a paradoxical regime shift characterized by sustained ice loss and surface salinification in the Kara–Laptev Seas (KLS) during boreal summer since 2008. A notable phase transition from surface freshening during one period (1997–2008) with rapid sea-ice melting to salinification during another period (2009–2020) with gentle sea-ice melting has been identified in the KLS. Using a mixed-layer salinity budget, we characterized quantitatively the role of ice melting in driving salinification across different seas. We show that the salinification observed post-2008 mainly arises from the weakened summer sea-ice-ocean freshwater input, particularly the localized reduction in ice volume during June–August. This recent salinification in the KLS likely maintains a relatively stable state in the thinner seasonal sea-ice prevailing in the new Arctic.
Sea-ice-loss slowdown modulates the sea surface salinification in the Kara–Laptev Seas since the 2008 summer
Recent studies have revealed the slowed Arctic sea-ice loss, but its climate effect on the ocean system remains unclear. By examining reanalysis datasets, we illustrate a paradoxical regime shift characterized by sustained ice loss and surface salinification in the Kara–Laptev Seas (KLS) during boreal summer since 2008. A notable phase transition from surface freshening during one period (1997–2008) with rapid sea-ice melting to salinification during another period (2009–2020) with gentle sea-ice melting has been identified in the KLS. Using a mixed-layer salinity budget, we characterized quantitatively the role of ice melting in driving salinification across different seas. We show that the salinification observed post-2008 mainly arises from the weakened summer sea-ice-ocean freshwater input, particularly the localized reduction in ice volume during June–August. This recent salinification in the KLS likely maintains a relatively stable state in the thinner seasonal sea-ice prevailing in the new Arctic.
Sea-ice-loss slowdown modulates the sea surface salinification in the Kara–Laptev Seas since the 2008 summer
Daling Li Yi (author) / Ke Fan (author) / Shengping He (author) / Peng Wang (author)
2024
Article (Journal)
Electronic Resource
Unknown
the slowed arctic sea-ice loss , regime shift since 2008 , surface salinification , weakened sea-ice-ocean freshwater input , mixed-layer salinity budget , Kara–Laptev Seas , Environmental technology. Sanitary engineering , TD1-1066 , Environmental sciences , GE1-350 , Science , Q , Physics , QC1-999
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