| Records |
| Author |
Akhmediev, N.; Kibler, B.; Baronio, F.; Belic, M.; Zhong, W.P.; Zhang, Y.Q.; Chang, W.; Soto-Crespo, J.M.; Vouzas, P.; Grelu, P.; Lecaplain, C.; Hammani, K.; Rica, S.; Picozzi, A.; Tlidi, M.; Panajotov, K.; Mussot, A.; Bendahmane, A.; Szriftgiser, P.; Genty, G.; Dudley, J.; Kudlinski, A.; Demircan, A.; Morgner, U.; Amiraranashvili, S.; Bree, C.; Steinmeyer, G.; Masoller, C.; Broderick, N.G.R.; Runge, A.F.J.; Erkintalo, M.; Residori, S.; Bortolozzo, U.; Arecchi, F.T.; Wabnitz, S.; Tiofack, C.G.; Coulibaly, S.; Taki, M. |
| Title |
Roadmap on optical rogue waves and extreme events |
Type |
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| Year |
2016 |
Publication |
Journal Of Optics |
Abbreviated Journal |
J. Opt. |
| Volume |
18 |
Issue |
6 |
Pages |
37 pp |
| Keywords |
rogue waves; extreme events; nonlinear optics |
| Abstract |
The pioneering paper 'Optical rogue waves' by Solli et al (2007 Nature 450 1054) started the new subfield in optics. This work launched a great deal of activity on this novel subject. As a result, the initial concept has expanded and has been enriched by new ideas. Various approaches have been suggested since then. A fresh look at the older results and new discoveries has been undertaken, stimulated by the concept of 'optical rogue waves'. Presently, there may not by a unique view on how this new scientific term should be used and developed. There is nothing surprising when the opinion of the experts diverge in any new field of research. After all, rogue waves may appear for a multiplicity of reasons and not necessarily only in optical fibers and not only in the process of supercontinuum generation. We know by now that rogue waves may be generated by lasers, appear in wide aperture cavities, in plasmas and in a variety of other optical systems. Theorists, in turn, have suggested many other situations when rogue waves may be observed. The strict definition of a rogue wave is still an open question. For example, it has been suggested that it is defined as 'an optical pulse whose amplitude or intensity is much higher than that of the surrounding pulses'. This definition (as suggested by a peer reviewer) is clear at the intuitive level and can be easily extended to the case of spatial beams although additional clarifications are still needed. An extended definition has been presented earlier by N Akhmediev and E Pelinovsky (2010 Eur. Phys. J. Spec. Top. 185 1-4). Discussions along these lines are always useful and all new approaches stimulate research and encourage discoveries of new phenomena. Despite the potentially existing disagreements, the scientific terms 'optical rogue waves' and 'extreme events' do exist. Therefore coordination of our efforts in either unifying the concept or in introducing alternative definitions must be continued. From this point of view, a number of the scientists who work in this area of research have come together to present their research in a single review article that will greatly benefit all interested parties of this research direction. Whether the authors of this 'roadmap' have similar views or different from the original concept, the potential reader of the review will enrich their knowledge by encountering most of the existing views on the subject. Previously, a special issue on optical rogue waves (2013 J. Opt. 15 060201) was successful in achieving this goal but over two years have passed and more material has been published in this quickly emerging subject. Thus, it is time for a roadmap that may stimulate and encourage further research. |
| Address |
[Akhmediev, Nail; Chang, Wonkeun; Vouzas, Peter] Australian Natl Univ, Opt Sci Grp, Res Sch Phys & Engn, Acton, ACT 2601, Australia, Email: Nail.Akhmediev@anu.edu.au |
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| Publisher |
Iop Publishing Ltd |
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English |
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2040-8978 |
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WOS:000378065100002 |
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UAI @ eduardo.moreno @ |
Serial |
635 |
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| Author |
Chang, M.; Liu, B.; Wang, B.; Martinez-Villalobos, C.; Ren, G.; Zhou, T. |
| Title |
Understanding future increases in precipitation extremes in global land monsoon regions |
Type |
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| Year |
2022 |
Publication |
Journal of Climate |
Abbreviated Journal |
J. Clim. |
| Volume |
35 |
Issue |
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Pages |
1839-1851 |
| Keywords |
Precipitation; Extreme events; Monsoons; Climate prediction; Thermodynamics; Dynamics |
| Abstract |
This study investigates future changes in daily precipitation extremes and the involved physics over the global land monsoon (GM) region using climate models from the Coupled Model Intercomparison Project Phase 6 (CMIP6). The daily precipitation extreme is identified by the cutoff scale, measuring the extreme tail of the precipitation distribution. Compared to the historical period, multi-model results reveal a continuous increase in precipitation extremes under four scenarios, with a progressively higher fraction of precipitation exceeding the historical cutoff scale when moving into the future. The rise of the cutoff-scale by the end of the century is reduced by 57.8% in the moderate emission scenario relative to the highest scenario, underscoring the social benefit in reducing emissions. The cutoff scale sensitivity, defined by the increasing rates of the cutoff scale over the GM region to the global mean surface temperature increase, is nearly independent of the projected periods and emission scenarios, roughly 8.0% K−1 by averaging all periods and scenarios. To understand the cause of the changes, we applied a physical scaling diagnostic to decompose them into thermodynamic and dynamic contributions. We find that thermodynamics and dynamics have comparable contributions to the intensified precipitation extremes in the GM region. Changes in thermodynamic scaling contribute to a spatially uniform increase pattern, while changes in dynamic scaling dominate the regional differences in the increased precipitation extremes. Furthermore, the large inter-model spread of the projection is primarily attributed to variations of dynamic scaling among models. |
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0894-8755 |
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UAI @ alexi.delcanto @ |
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1500 |
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| Author |
Neelin, J.D.; Martinez-Villalobos, C.; Stechmann, S.N.; Ahmed, F.; Chen, G.; Norris, J.M.; Kuo, Y.H.; Lenderink, G. |
| Title |
Precipitation Extremes and Water Vapor Relationships in Current Climate and Implications for Climate Change |
Type |
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| Year |
2022 |
Publication |
Current Climate Change Reports |
Abbreviated Journal |
Curr. Clim. Change Rep. |
| Volume |
8 |
Issue |
1 |
Pages |
17-33 |
| Keywords |
Rainfall; Climate change; Deep convection; Extreme events; Precipitation probability; Stochastic model |
| Abstract |
Purpose of Review: Review our current understanding of how precipitation is related to its thermodynamic environment, i.e., the water vapor and temperature in the surroundings, and implications for changes in extremes in a warmer climate. Recent Findings: Multiple research threads have i) sought empirical relationships that govern onset of strong convective precipitation, or that might identify how precipitation extremes scale with changes in temperature; ii) examined how such extremes change with water vapor in global and regional climate models under warming scenarios; iii) identified fundamental processes that set the characteristic shapes of precipitation distributions. While water vapor increases tend to be governed by the Clausius-Clapeyron relationship to temperature, precipitation extreme changes are more complex and can increase more rapidly, particularly in the tropics. Progress may be aided by bringing separate research threads together and by casting theory in terms of a full explanation of the precipitation probability distribution. |
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2198-6061 |
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WOS:000768603000001 |
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UAI @ alexi.delcanto @ |
Serial |
1560 |
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