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基于海洋觀測與再分析數(shù)據(jù)的海底地形估算

單位：1. 中山大學(xué)海洋科學(xué)學(xué)院, 廣東珠海 519082;
2. 南方海洋科學(xué)與工程廣東省實驗室(珠海), 廣東珠海 519000;
3. 中山大學(xué)人工智能學(xué)院, 廣東珠海 519082;
4. 中山大學(xué)大氣科學(xué)學(xué)院, 廣東珠海 519082

關(guān)鍵詞：海面高度海底壓強(qiáng) 海底地形海底深度

分類號：P737.22

出版年·卷·期（頁碼）：2025·42·第一期（38-47）

摘要：

準(zhǔn)確估算全球海底地形是海洋科學(xué)中的重要問題，也是經(jīng)典難題。針對這一難題，從海洋動力學(xué)基礎(chǔ)理論出發(fā)，提出了一條估算海底地形的新思路，即給定海面高度和海底壓強(qiáng)，利用海水靜力平衡關(guān)系高精度地估算海底地形。依據(jù)這個思路利用衛(wèi)星海面高度和站位海底壓強(qiáng)記錄儀等觀測數(shù)據(jù)對個別觀測站位進(jìn)行驗證，同時利用再分析數(shù)據(jù)中的海面高度和海底壓強(qiáng)在全球海域進(jìn)行驗證。結(jié)果顯示，估算的海底地形誤差明顯小于衛(wèi)星高度計和數(shù)字高程模型等傳統(tǒng)觀測手段的誤差，表明上述思路具有較高的可靠性。

Accurately estimating the global seafloor topography is an important issue and a classic challenge in marine science. To tackle this problem, this study proposes a new approach for estimating the seafloor topography based on fundamental theories of ocean dynamics. Given sea surface height and ocean bottom pressure, the hydrostatic equilibrium relationship is utilized to effectively provide high-precision estimation of the seafloor topography. This paper validates the above approach at individual observation sites using satellite observations of sea surface height and records from bottom pressure recorders, and also in the global ocean using sea surface height and ocean bottom pressure from reanalysis datasets. The results show that the estimated seafloor topography errors are significantly smaller than those from traditional methods such as satellite altimetry and digital elevation models, indicating the high reliability of the proposed approach.

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