Propagation Route and Speed of Swell in the Indian Ocean

Zheng, Chunmiao; Li, C. Y.; Pan, Jing

doi:10.1002/2016jc012585

Cited by 40 publications

(14 citation statements)

References 27 publications

(48 reference statements)

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“…Note that more swells are coming from southwest, and these swells have a longer wavelength (350 m approximately) than those from southeast (around 300 m) statistically. Both of these features indicate that Southern swells have more influence on the Bay of Bengal than the Arabian Sea, in line with previous finding from modeling [21] [22].…”

Section: Core Crossing Swell Pool and Its Propertiessupporting

confidence: 90%

Indian Ocean Crossing Swells: New Insights from “Fireworks” Perspective Using Envisat Advanced Synthetic Aperture Radar

et al. 2021

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Synthetic Aperture Radar (SAR) in wave mode is a powerful sensor for monitoring the swells propagating across ocean basins. Here, we investigate crossing swells in the Indian Ocean using 10-years Envisat SAR wave mode archive spanning from December 2003 to April 2012. Taking the benefit of the unique "fireworks" analysis on SAR observations, we reconstruct the origins and propagating routes that are associated with crossing swell pools in the Indian Ocean. Besides, three different crossing swell mechanisms are discriminated from space by the comparative analysis between results from "fireworks" and original SAR data: (1) in the mid-ocean basin of the Indian Ocean, two remote southern swells form the crossing swell; (2) wave-current interaction; and, (3) co-existence of remote Southern swell and shamal swell contribute to the crossing swells in the Agulhas Current region and the Arabian Sea.

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Section: Core Crossing Swell Pool and Its Propertiessupporting

confidence: 90%

Indian Ocean Crossing Swells: New Insights from “Fireworks” Perspective Using Envisat Advanced Synthetic Aperture Radar

et al. 2021

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“…During JJA, the AS is dominated by mixed sea state i. e, a combination of strong monsoon winds forced wind sea and swell 22 , 29 and peak wave period above 15 s is rarely seen in this period indicating non-dominance of SIO swells. A recent study shows that the SIO swell propagation is more towards BOB during JJA 41 . These points set the background for the explanation of in phase relation of MWP anomalies with SWH in AS.…”

Section: Resultsmentioning

confidence: 96%

The influence of boreal summer intra-seasonal oscillations on Indo-western Pacific Ocean surface waves

Srinivas

Remya

Malavika

et al. 2020

Sci Rep

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The present study examines the influence of Boreal Summer Intra-Seasonal Oscillation (BSISO) on Tropical Indian Ocean surface waves using the latest version of ECMWF reanalysis (ERA5) during summer monsoon months June through August (JJA). BSISO is a distinct mode of ISO during JJA having a northward and eastward movement from the equatorial Indian Ocean to the western Pacific Ocean. Composite analysis of anomalies of significant wave heights (SWH), wind sea, swell, and mean wave period for 8 phases of BSISO has been carried out to understand its influence. SWH anomalies in response to BSISO’s are phase-dependent. Negative SWH anomalies are noticed with strong northward and weak eastward propagation during the phases 1–3 in response to the easterly wind anomalies over the north Indian Ocean (NIO). During phases 5–7, high positive SWH anomalies (~ 0.5 m) in response to the westerly wind anomalies with northward and weak eastward propagation over NIO. Phases 4 and 8 behave like transition phases. In addition, enhanced (suppressed) SWH anomalies (~ 0.5 m) are seen during the active (break) spells of BSISO over NIO. Over the southern tip of India, negative (positive) SWH anomalies prevail during the active (break) conditions. This study clearly suggests that the wave forecast advisories during intra-seasonal time scales would be more useful for offshore and coastal activities during the summer monsoon.

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“…First, the 6-hourly values of WPD S1 and WPD E in DJF 2001 are plotted, as shown in Figure 6a. Subsequently, the simultaneous, leading and lagging correlations between them were calculated (Figure 6b) according to the methods of Zheng et al [28] and Gan and Wu [29]. Based on observing the curves of WPD S1 and WPD E , it is difficult to find a good agreement.…”

Section: B Relationship Between Swells Of the Source Region And Terminal Regionmentioning

confidence: 99%

Source Tracing of the Swell Energy: A Case Study of the Pacific Ocean

Zheng

Chen²,

Zhan

et al. 2019

IEEE Access

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During the resource crisis, swell energy received an increasing amount of attention due to its stability, huge energy storage and dominant role in the mixed wave. Investigation of the swell propagation is beneficial for wave energy forecasting, swell monitoring and warning and so on. However, little research has been conducted on this topic so far. The traditional method is to choose a region in advance (short as pre-chosen region) and then detect the propagation termination of the swell of this region, which is limited in effectiveness because the swell of the pre-chosen region may not propagate to the area focused. Based on the 40-year European Centre for Medium-Range Weather Forecast (ECMWF) re-analysis (ERA-40 wave reanalysis), this study proposed a back-stepping method to trace the source of swell energy. The Clipperton Island waters are selected as a case study. Results show that the back-stepping method is an effective way to trace back the source of swell energy. The swells of the Clipperton Island waters mainly come from the winter Hemisphere. The swells need about 120 hours to propagate from the Hawaii waters to the Clipperton Island waters, while 180 hours to propagate from the Maria-Theresa Reef to the Clipperton Island waters.INDEX TERMS ERA-40 wave reanalysis, swell energy, source trace, back-stepping method.

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Propagation Route and Speed of Swell in the Indian Ocean

Cited by 40 publications

References 27 publications

Indian Ocean Crossing Swells: New Insights from “Fireworks” Perspective Using Envisat Advanced Synthetic Aperture Radar

Indian Ocean Crossing Swells: New Insights from “Fireworks” Perspective Using Envisat Advanced Synthetic Aperture Radar

The influence of boreal summer intra-seasonal oscillations on Indo-western Pacific Ocean surface waves

Source Tracing of the Swell Energy: A Case Study of the Pacific Ocean

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