Details

Autor(en) / Beteiligte

• Toyoda, Takahiro
• Iwamoto, Katsushi
• Urakawa, L. Shogo
• Tsujino, Hiroyuki
• Nakano, Hideyuki
• Sakamoto, Kei
• Yamanaka, Goro
• Komuro, Yoshiki
• Nishino, Shigeto
• Ukita, Jinro

Titel

Incorporation of satellite-derived thin-ice data into a global OGCM simulation

Ist Teil von

• Climate dynamics, 2019-12, Vol.53 (11), p.7113-7130

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The presence of thin sea ice is indicative of active freezing conditions in the polar ocean. We propose a simple yet effective method to incorporate information of thin-ice category into coupled ocean–sea-ice model simulations. In our approach, the thin-ice distribution restricts thick-ice extent and constrains atmosphere–ocean heat exchange through the sea ice. Our model simulation with the incorporation of satellite-derived thin-ice data for the Arctic Ocean showed much improved representation of sea-ice and upper-ocean fields, including sea-ice thickness in the Canadian Archipelago and the region north of Greenland, mixed-layer depth over the Central Arctic, and surface-layer salinity over the open ocean. Enhanced sea-ice production by the thin-ice data constraint increased the total sea-ice volume of the Arctic Ocean by 5 × 10 3 – 10 × 10 3  km 3 . Subsequent sea-ice melting was also enhanced, leading to the greater amplitude of the seasonal cycle by approximately 2 × 10 3  km 3 (15% of the baseline value from the experiment without the thin-ice data incorporation). Overall, our results demonstrate that the incorporation of satellite-derived information on thin sea ice has great potential for the improvement of coupled ocean–sea-ice simulations.