Seasonal changes in the global wave climate measured by the Geosat altimeter

Challenor, Peter; Foale, S.; Webb, D. J.

doi:10.1080/01431169008955170

Cited by 26 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mognard et al (1983) used this same data set to produce mean monthly H s fields for the Southern Hemisphere winter of 1978. Challenor et al (1990), Carter et al (1991), Romeiser (1993) and Young (1994) used GEOSAT data to investigate global variations in H s . Young and Holland (1996) used a combination of GEOSAT altimeter data and atmospheric circulation model results to investigate global mean monthly H s , U 10 and q u fields.…”

Section: Global Variation Of Wave Conditionsmentioning

confidence: 99%

Seasonal variability of the global ocean wind and wave climate

1999

View full text Add to dashboard Cite

Section: Global Variation Of Wave Conditionsmentioning

confidence: 99%

Seasonal variability of the global ocean wind and wave climate

1999

View full text Add to dashboard Cite

“…More recently Carter et af. (\990) and Challenor et al (1990) have analysed one year of Geosat data to look at global monthly and annual means of H •. The results of these studies show the existence of high waves in the Southern Ocean, presumably due to the higher wind speeds there and the much longer fetches over which they are generated.…”

Section: Global and Seasonal H Distributionsmentioning

confidence: 99%

Wave studies with the radar altimeter

Challenor

Srokosz

1991

International Journal of Remote Sensing

Self Cite

View full text Add to dashboard Cite

In this paper we review the physical understanding and the algorithms necessary to extract waveinformation from the radar altimeter return from the sea surface. This allows us to assess the progress made since the launch of Seasat, to identifyareas where further work is necessary in order to developour understanding of the basic mechanisms of radar interaction with the sea surface, and to suggest how new wave parameters might be obtained from the radar return. Followingon from this we review the wavestudiesthat have beencarried out using Seasat and Geosat altimeter data and present some new results, on the joint probability distribution of significant waveheight and wind speed, which we have obtained recentlyfrom Seasat data.

show abstract

“…Wave records from satellite altimetry provide a robust means of quantifying the spatial distribution of the mean wave climate (e.g. Challenor et al, 1990;Tournadre and Ezraty, 1990;Young, 1994Young, , 1999, and estimates of the extreme wave climate have been made using altimetry (e.g. Alves and Young, 2003;Vinoth and Young, 2011).…”

Section: Introductionmentioning

confidence: 99%

Extreme cyclone wave climate in the Southwest Pacific Ocean: Influence of the El Niño Southern Oscillation and projected climate change

Stephens

Ramsay

2014

Global and Planetary Change

View full text Add to dashboard Cite

a b s t r a c tThis paper describes the first use of a stochastic cyclone model (SCM) to quantify the extreme significant wave height from tropical cyclones across the Southwest Pacific Ocean. The median extreme significant wave heights across the entire SW Pacific Ocean were 7.5, 10 and 11 m for annual exceedance probabilities (AEPs) of 0.1, 0.02 and 0.01 respectively. Maximum significant wave heights in the region were approximately 1.5 times these values for the same AEP. Tables of extreme significant wave heights are provided for selected inhabited locations. The SCM was used to quantify the effects of the El Niño-Southern Oscillation (ENSO) on extreme significant wave heights, and also the effects of projected climate change on cyclone intensity and frequency of occurrence. West of the International Dateline in the region of the Vanuatu archipelago, the extreme cyclone wave climate was relatively consistent during all phases of the ENSO cycle, but highest during El Niño. Cyclone formation and propagation eastward of the Dateline are more likely to occur during El Niño conditions, however these cyclones tended to be more intense, particularly during extreme El Niño events, leading to a higher long-term extreme wave climate in the eastern SW Pacific, despite the relatively low cyclone observation rate there. Simulations of climate change cyclone intensity increases of 10-20% of the most intense cyclones (categories 4 and 5) along with 10-20% reduction in number of cyclones indicated little change in extreme significant wave heights for low-occurrence AEPs of 1/20 or less. These changes were much less than induced by present-day ENSO variability, suggesting that future changes in extreme wave climate will be sensitive to climate change influences on the frequency and intensity of ENSO events. These results are significant in the light of indications that the frequency of extreme El Nino events might double in response to greenhouse warming.

show abstract

Seasonal changes in the global wave climate measured by the Geosat altimeter

Cited by 26 publications

References 4 publications

Seasonal variability of the global ocean wind and wave climate

Seasonal variability of the global ocean wind and wave climate

Wave studies with the radar altimeter

Extreme cyclone wave climate in the Southwest Pacific Ocean: Influence of the El Niño Southern Oscillation and projected climate change

Contact Info

Product

Resources

About