卫星海面盐度对估算波弗特海液体淡水含量的贡献

IF 5.4 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
M. Umbert, E. De Andrés, M. Sánchez, C. Gabarró, N. Hoareau, V. González-Gambau, Aina García-Espriu, E. Olmedo, R. Raj, Jiping Xie, R. Catany
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引用次数: 1

摘要

摘要在过去 20 年中,北冰洋的水文地理发生了深刻变化。海冰面积每十年减少 10%以上,其液态淡水含量增加的主要原因是冰川和海冰融化。此外,新的北极海表盐度(SSS)卫星检索可能有助于更好地描述寒冷地区的淡水变化特征。海洋盐度和淡水含量密切相关,一方的增加(减少)会导致另一方的减少(增加)。在这项工作中,我们利用卫星辐射测量任务 "土壤水分和海洋盐度(SMOS)"的表层盐度测量数据和 TOPAZ4b 深度盐度再分析数据评估了波弗特环流的淡水含量,估算了 2011 年至 2019 年的淡水含量,并将结果与现场测量数据进行了验证。结果表明,在波弗特海使用再分析数据低估了淡水含量,而在混合层加入卫星海面盐度测量数据后,淡水含量估算有了明显改善。这种改进非常明显,在冰融化附近区域的偏差最多可减少 70%。我们的研究表明,遥感盐度可以帮助我们更好地监测北极淡水含量的变化,了解与盐度变化有关的关键过程,盐度变化造成的密度差异有可能影响调节地球气候的全球环流系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Contribution of satellite sea surface salinity to the estimation of liquid freshwater content in the Beaufort Sea
Abstract. The hydrography of the Arctic Ocean has experienced profound changes over the last 2 decades. The sea ice extent has declined by more than 10 % per decade, and its liquid freshwater content has increased mainly due to glaciers and sea ice melting. Further, new satellite retrievals of sea surface salinity (SSS) in the Arctic might contribute to better characterizing the freshwater changes in cold regions. Ocean salinity and freshwater content are intimately related such that an increase (decrease) in one entails a decrease (increase) in the other. In this work, we evaluate the freshwater content in the Beaufort Gyre using surface salinity measurements from the satellite radiometric mission Soil Moisture and Ocean Salinity (SMOS) and TOPAZ4b reanalysis salinity at depth, estimating the freshwater content from 2011 to 2019 and validating the results with in situ measurements. The results highlight the underestimation of the freshwater content using reanalysis data in the Beaufort Sea and a clear improvement in the freshwater content estimation when adding satellite sea surface salinity measurements in the mixed layer. The improvements are significant, with up to a 70 % reduction in bias in areas near the ice melting. Our research demonstrates how remotely sensed salinity can assist us in better monitoring the changes in the Arctic freshwater content and understanding key processes related to salinity variations that cause density differences with potential to influence the global circulation system that regulates Earth's climate.
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来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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