[口头报告]Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean

Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean
编号:2151 稿件编号:437 访问权限:私有 更新:2023-04-11 09:27:39 浏览:350次 口头报告

报告开始:2023年05月07日 08:24 (Asia/Shanghai)

报告时间:12min

所在会议:[18A] 18A、冰冻圈科学 » [18A-2] 18A-2 冰冻圈科学

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摘要
The seasonally-dependent Antarctic sea ice concentration (SIC) budget is well-observed and synthesizes many important air-sea-ice interaction processes. However, it is rarely well simulated in Earth System Models and means to tune the former are not well understood. In this study, we investigate the sensitivity of 18 key NEMO4.0-SI3 (Nucleus for European Modelling of the Ocean coupled with the Sea Ice modelling Integrated Initiative) model parameters on modelled SIC and sea ice volume (SIV) budgets in the Southern Ocean based on a total of 449 model runs and two global sensitivity analysis methods. We found the simulated SIC/SIV budgets are sensitive to ice strength, the thermal conductivity of snow, the number of ice categories, two parameters related to lateral melting, ice-ocean drag coefficient and air-ice drag coefficient. An optimised ice-ocean drag coefficient and air-ice drag coefficient can reduce the root-mean-square error between simulated and observed SIC budget by about 10%. We recommend ten combinations of NEMO4.0-SI3 model parameters that could yield better sea ice extent and SIC budgets than using the standard values.
关键字
NEMO4.0-SI3 model, sea ice budget, sensitivity study
报告人
聂亚飞
中山大学

稿件作者
聂亚飞 中山大学
李成坤 University of Helsinki
VancoppenolleMartin Sorbonne Université
ChengBin Finnish Meteorological Institute
Boeira DiasFabio University of Helsinki
吕咸青 中国海洋大学
UotilaPetteri {; Finland; Faculty of Science; University of Helsinki
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