Preprints
https://doi.org/10.5194/tc-2023-134
https://doi.org/10.5194/tc-2023-134
11 Dec 2023
 | 11 Dec 2023
Status: this preprint is currently under review for the journal TC.

Dynamic and Thermodynamic Processes Related to Sea-Ice Surface Melt Advance in the Laptev Sea and East Siberian Sea

Hongjie Liang and Wen Zhou

Abstract. Arctic summer sea ice has shrunk considerably in recent decades. This study investigates sea-ice surface melt onset in springtime in the Laptev Sea and East Siberian Sea, which are key seas along the Northeast Passage. Melt Advance, which is defined as the areal percentage of a sea that has experienced sea-ice surface melting before the end of May, is used instead of region-mean melt onset. Four representative scenarios of Melt Advance in the region are identified. Each scenario is driven by a distinct circulation in the lower troposphere in May, which regulates sea ice dynamics and air mass transport, further influencing surface energy balance and Melt Advance. In general, concurrent with faster Melt Advance are warm and wet atmosphere, reduced sea ice cover, and surface energy gains in spring. Melt Advance, as well as sea ice cover in May, is significantly correlated with summer sea ice over. This study implicates the interannual flexibility of spring circulation in the lower troposphere and the significance of seasonal evolution in the Arctic.

Hongjie Liang and Wen Zhou

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2023-134.', Anonymous Referee #1, 12 Jan 2024
    • AC1: 'Reply on RC1', Hongjie Liang, 22 Feb 2024
  • RC2: 'Comment on tc-2023-134', Anonymous Referee #2, 23 Jan 2024
    • AC2: 'Reply on RC2', Hongjie Liang, 22 Feb 2024
Hongjie Liang and Wen Zhou
Hongjie Liang and Wen Zhou

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Short summary
This study focuses on the processes related to sea ice melt onset in the Laptev Sea and East Siberian Sea. The results reveal the driving role of atmospheric circulation in the lower troposphere, which is responsible for sea ice dynamics and air mass transport. In the future, it may be worthwhile to study the interannual flexibility of spring circulation in the lower troposphere and seasonal evolution in the Arctic.