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| DOI | 10.1038/s41598-024-55170-x |
| Sea level variability in Gulf of Guinea from satellite altimetry | |
| 发表日期 | 2024 |
| ISSN | 2045-2322 |
| 起始页码 | 14 |
| 结束页码 | 1 |
| 卷号 | 14期号:1 |
| 英文摘要 | Coastal zones with dense populations, low elevations and/or inadequate adaptive capacity are on the frontline of unprecedented impacts from climate change. The Gulf of Guinea (GoG), stretching from Liberia to Gabon, is in particular vulnerable to coastal flooding caused by local and/or climate-induced sea level rise. In this region, interannual to decadal coastal sea level changes remain poorly understood, mainly due to a lack of tide gauge stations. Here we use nearly three decades (1993-2021) of satellite altimetry data to study the link between the Equatorial Atlantic and coastal GoG sea level variability. The rate of mean sea level rise increased from 3.47 to 3.89 +/- 0.10 mm/yr from the Equatorial oceanic domain to the GoG coastal area, with an acceleration of 0.094 +/- 0.050 mm/yr2. This corresponds to a mean sea level rise of about 8.9 cm over the entire altimetry period, 1993-2021. We focus on the (extreme) warm/cold events that occur in both the GoG during Atlantic Ninos, and along the Angola-Namibia coast during Benguela Ninos. Both events are driven by remote forcing via equatorial Kelvin waves and local forcing by local winds, freshwater fluxes and currents intensifications. Analysis of altimetry-based sea level, sea surface temperature anomalies, 20 degrees C isotherm based PIRATA moorings, and the Argo-based steric and thermometric sea level allows us to follow the coastal trapped waves (CTWs) along the GoG, and its link with major events observed along the strong Equatorial Atlantic warmings in 2010, 2012, 2019 and 2021. Both 2019 and 2021 warming have been identified as the warmest event ever reported in this region during the last 40 years. A lag of 1 month is observed between equatorial and West African coastal trapped wave propagation. This observation may help to better anticipate and manage the effects of extreme events on local ecosystems, fisheries, and socio-economic activities along the affected coastlines. In order to enable informed decision-making and guarantee the resilience of coastal communities in the face of climate change, it emphasises the significance of ongoing study in this field. |
| 语种 | 英语 |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:001177603900012 |
| 来源期刊 | SCIENTIFIC REPORTS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/291653 |
| 作者单位 | University of Cape Town; University of Cape Town; Nansen Environmental & Remote Sensing Center (NERSC); Bjerknes Centre for Climate Research |
| 推荐引用方式 GB/T 7714 | . Sea level variability in Gulf of Guinea from satellite altimetry[J],2024,14(1). |
| APA | (2024).Sea level variability in Gulf of Guinea from satellite altimetry.SCIENTIFIC REPORTS,14(1). |
| MLA | "Sea level variability in Gulf of Guinea from satellite altimetry".SCIENTIFIC REPORTS 14.1(2024). |
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