Analysis of wave climate and trends in a semi-enclosed basin (Persian Gulf) using a validated SWAN model. (15th January 2020)

• Record Type: Journal Article
• Authors: Vieira, F.; Cavalcante, G.; Campos, E.
• Is Part Of: Ocean engineering. Volume 196(2020)
• Publication Date: 2020-01-15
• Subjects: Persian gulf -- Wave modelling -- Hindcast -- SWAN -- Satellite altimeter -- Wave climate trends; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2019.106821
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Results from a spectral wave model of the Persian Gulf for a long-term period (32-year) are used to describe and quantify the seasonal wave climate and trends. The model is forced by a wind reanalysis dataset and validated against a set of field measurements and altimeter data from various satellite missions. The results revealed the existence of a more energetic wave (higher Hm0 and larger TP ) zone located at the southern regions of the Gulf that is linked to the predominant and stronger north-westerly winds. The wave heights and periods are intensified in winter (Hm0 >2.7m and TP > 8s for the 99th percentile) followed by spring. The waves conditions are milder in autumn. The analysis of wave climate trends throughout the region clearly show an overall slight positive trend (0–0.2%/year) in mean Hm0, which is associated with long-term positive trends in wind speed. There is generally a positive trend in the mean significant wave height during winter (0–0.8%/year), spring (0–0.6%/year) and autumn (0–1.0%/year), and negative during summer (0–0.8%/year). The results indicate that the more statistically significant results are at the areas with larger magnitude of trends. Highlights: New insights into wave climate and trends in the Persian Gulf. 32-year wave hindcast of the Gulf using SWAN and CFSR wind. Validation of model against field measurements and satellite altimeter data. Historical positive trend in Hm0 during winter and negative during summer.