How Salty Is the Global Ocean: Weighing It All or Tasting It a Sip at a Time?

How Salty Is the Global Ocean: Weighing It All or Tasting It a Sip at a Time?
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全球海洋有多咸:称重还是一次尝一小口?

DOI:
10.1029/2021gl092935
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发表时间:
2021
影响因子:
5.2
通讯作者:
Liang, X.
Liang, X.
中科院分区:
地球科学1区
文献类型:
--
作者:
Ponte, R. M.;Sun, Q.;Liu, C.;Liang, X.

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全球海洋平均盐度是地球水文循环和陆地与海洋之间淡水交换的关键指标,但其测定仍然是一项挑战。除了基于现场测量得出的网格化盐度场的传统方法外,我们还探索了基于经海冰影响校正的空间重力测量数据得出的液体淡水变化的估计。在分析的2005-2019年期间,不同序列在季节、年际和长期变率方面几乎没有一致性。就地估计显示了对产品选择的敏感性和不切实际的变化。自2015年以来可疑的大幅上升足以测量影响卤化海平面估计值,并可以解释最近全球平均海平面预算的差异。基于重力法的估算更现实,与淡水对全球平均海平面的贡献估算内在上是一致的,并提供了一种校准原位估算的方法。
Global ocean mean salinity is a key indicator of the Earth's hydrological cycle and the exchanges of freshwater between land and ocean, but its determination remains a challenge. Aside from traditional methods based on gridded salinity fields derived from in situ measurements, we explore estimates of based on liquid freshwater changes derived from space gravimetry data corrected for sea ice effects. For the 2005–2019 period analyzed, the different series show little consistency in seasonal, interannual, and long‐term variability. In situ estimates show sensitivity to choice of product and unrealistic variations. A suspiciously large rise in since ∼2015 is enough to measurably affect halosteric sea level estimates and can explain recent discrepancies in the global mean sea level budget. Gravimetry‐based estimates are more realistic, inherently consistent with estimated freshwater contributions to global mean sea level, and provide a way to calibrate the in situ estimates.
DOI: 10.1175/jcli-d-20-0053.1
发表时间: 2020-10
期刊: Journal of Climate
影响因子: 4.9
作者:
Chao Liu;Xin‐Zhong Liang;D. Chambers;R. Ponte
通讯作者: Chao Liu;Xin‐Zhong Liang;D. Chambers;R. Ponte
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DOI: --
发表时间: 2019
影响因子: 3.7
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DOI: 10.1080/16000870.2018.1471911
发表时间: 2018
期刊: Tellus A: Dynamic Meteorology and Oceanography
影响因子: --
作者:
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通讯作者: C. Wunsch