Impacts of Atmospheric Pressure on the Annual Maximum of Monthly Sea-Levels in the Northeast Asian Marginal Seas
| Autor: | Do-Seong Byun, Eun-Il Lee, MyeongHee Han, SungHyun Nam, Kwang-Young Jeong, Yang-Ki Cho, Hyoun-Woo Kang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
Correlation coefficient Wind stress Ocean Engineering Atmospheric sciences 01 natural sciences lcsh:Oceanography atmospheric pressure lcsh:VM1-989 August NEAMS sea-level index Ekman transport lcsh:GC1-1581 Sea level 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Atmospheric pressure interannual variation 010505 oceanography Anomaly (natural sciences) lcsh:Naval architecture. Shipbuilding. Marine engineering satellite altimetry sea-level Satellite altimetry High pressure Environmental science wind stress |
| Zdroj: | Journal of Marine Science and Engineering, Vol 8, Iss 425, p 425 (2020) Journal of Marine Science and Engineering Volume 8 Issue 6 |
| ISSN: | 2077-1312 |
| Popis: | Monthly mean sea-levels have annual maxima in August in the northeast Asian marginal seas (NEAMS). Based on satellite altimetry data, the rising rate of the August NEAMS sea-level (ANS, 4.2 mm∙yr&minus 1) is greater than those of the NEAMS (3.6 mm∙yr&minus 1) and global (3.4 mm∙yr&minus 1) annual mean sea-levels. Thus, the interannual variations of ANS are classified as relatively high (period H) and low (period L) years and have been analysed because of the high risk of sea-level fluctuation to the coastal regions in August. In period H, there are large atmospheric pressure gradients between the high pressure zone in the Kuroshio Extension (KE) and the low pressure zone in the west of Taiwan (WT). In period L, the atmospheric pressure gradients are small between the above-mentioned zones. Large atmospheric pressure gradients induce strong west-northwestward wind stresses and more Ekman transport from the northwest Pacific Ocean into the NEAMS. The correlation coefficient between August NEAMS sea-level index (ANSI), which is the difference of atmospheric pressure anomalies between the KE and the WT, and the August NEAMS sea-level anomaly (ANSA) is 0.73. Although there is a significant correlation (coefficient: 0.64) between ANSA and the East Asian summer monsoon index (EASMI), ANSI might be more useful in estimating the variability of ANSA. |
| Databáze: | OpenAIRE |
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