The potential of sea ice leads as a predictor for summer Arctic sea ice extent

The potential of sea ice leads as a predictor for summer Arctic sea ice extent
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海冰作为夏季北极海冰范围预测因子的潜力

DOI:
10.5194/tc-12-3747-2018
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发表时间:
2018-11
期刊:
影响因子:
5.2
通讯作者:
Hui Fengming
Hui Fengming
中科院分区:
地球科学2区
文献类型:
--
作者:
Zhang Yuanyuan;Cheng Xiao;Liu Jiping;Hui Fengming

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抽象的。整个融化季节的北极海冰范围与 在冬季和春季具有初始海冰状态。海冰信息很重要 北冰洋的能量通量,这可能发挥重要作用 北极海冰的演变。在这项研究中,我们研究了 作为夏季北极海冰范围预报的预测因子 使用最近开发的每日海冰铅产品, 中分辨率成像光谱仪(MODIS)。我们的结果显示 7月泛北极海冰范围可从海冰面积预测 从仲冬到春末的积分,预测误差为 0.28百万平方公里,小于标准偏差 观测到的年际变化。然而,8月份的预测技能 9月的北极海冰范围很小。当海洋面积 冰铅整合在大西洋和中部和西部西伯利亚部门, 北极是使用,它有一个显着的强关系(高 可预测性)与大西洋7月和8月的海冰范围, 位于北极西伯利亚中部和西部。因此,现实的 海冰引线的表示(例如,面积覆盖率) 预报系统可以提高北极地区的预报能力。
Abstract. The Arctic sea ice extent throughout the melt season is closely associated with initial sea ice state in winter and spring. Sea ice leads are important sites of energy fluxes in the Arctic Ocean, which may play an important role in the evolution of Arctic sea ice. In this study, we examine the potential of sea ice leads as a predictor for summer Arctic sea ice extent forecast using a recently developed daily sea ice lead product retrieved from the Moderate-Resolution Imaging Spectroradiometer (MODIS). Our results show that July pan-Arctic sea ice extent can be predicted from the area of sea ice leads integrated from midwinter to late spring, with a prediction error of 0.28 million km2 that is smaller than the standard deviation of the observed interannual variability. However, the predictive skills for August and September pan-Arctic sea ice extent are very low. When the area of sea ice leads integrated in the Atlantic and central and west Siberian sector of the Arctic is used, it has a significantly strong relationship (high predictability) with both July and August sea ice extent in the Atlantic and central and west Siberian sector of the Arctic. Thus, the realistic representation of sea ice leads (e.g., the areal coverage) in numerical prediction systems might improve the skill of forecast in the Arctic region.
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