从 1994 年至 2023 年的观测数据看北极和南极海冰厚度和体积的变化

IF 3.3 2区 地球科学 Q1 OCEANOGRAPHY
Marion Bocquet, Sara Fleury, Frédérique Rémy, Fanny Piras
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引用次数: 0

摘要

北极和南极的海冰都受到气候变化的影响。几十年来,北极海冰一直在减少,而南极海冰面积在 2015 年之前一直缓慢增加,2016 年则急剧下降。量化海冰变化对于评估其对海洋、大气、生态系统和北极社区的影响至关重要。在这项研究中,我们结合了四个卫星雷达测高仪的海冰厚度估计值,得出了两个半球 30 年(1994-2023 年)来同质海冰厚度的最长时间序列。该记录证实了北极海冰在一年中的每个月份都在迅速减少,以及南极海冰厚度的异质性变化。研究证实,大部分体积变化是由厚度变化引起的,这一点在两个半球都适用。这里介绍的海冰厚度时间序列为模型提供了新的见解,特别是为评估海冰再分析和初始化预报提供了可能性,尤其是在南极,这里介绍的数据集在空间和时间覆盖方面都是无与伦比的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Arctic and Antarctic Sea Ice Thickness and Volume Changes From Observations Between 1994 and 2023

Arctic and Antarctic Sea Ice Thickness and Volume Changes From Observations Between 1994 and 2023

Both Arctic and Antarctic sea ice are affected by climate change. While Arctic sea ice has been declining for several decades, Antarctic sea ice extent slowly increased until 2015, followed by a sharp drop in 2016. Quantifying sea ice changes is essential to assess their impacts on the ocean, atmosphere, ecosystems and Arctic communities. In this study, we combine sea ice thickness estimates from four satellite radar altimeters to derive the longest time series of homogeneous sea ice thickness for both hemispheres over 30 years (1994–2023). The record supports the rapid loss of sea ice in the Arctic for each month of the year and the heterogeneous changes in sea ice thickness in the Antarctic. The study confirms that most of the volume variability is due to the thickness variability, which holds true for both hemispheres. The sea ice thickness time series presented here offer new insights for models, in particular the possibility to evaluate sea ice reanalyses and to initialize forecasts, especially in the Antarctic, where the data set presented here has no equivalent in terms of spatial and temporal coverage.

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来源期刊
Journal of Geophysical Research-Oceans
Journal of Geophysical Research-Oceans Earth and Planetary Sciences-Oceanography
CiteScore
7.00
自引率
13.90%
发文量
429
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