Extreme Waves

Hansom, J.D.; Switzer, Adam D.; Pile, Jeremy

doi:10.1016/b978-0-12-396483-0.00011-x

Cited by 24 publications

(15 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the metrics necessary to characterise and classify biogeochemical extreme events that can be introduced for a time series at specific sites (e.g. in Hauri et al, 2013;Hobday et al, 2016;Asch et al, 2019;Salgado-Hernanz et al, 2019) have been further developed to describe the shape and strength of EEWs and provide meaningful insights into related biogeochemical phenomenology.…”

Section: Discussionmentioning

confidence: 99%

“…In particular, some studies on marine heat waves (Hobday et al, 2016), hypoxia events (e.g. Conley et al, 2009) and low aragonite saturation states (Hauri et al, 2013) have identified extreme events at a given site by starting from the values of a specific ecosystem variable that are above or below a certain threshold for a finite time duration. Although a common definition of "extreme event" in this context is lacking, its main emerging features include (i) the intensity (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Although a common definition of "extreme event" in this context is lacking, its main emerging features include (i) the intensity (i.e. the absolute difference of the variable value with respect to the threshold), which is considered a large deviation from a reference ecological state; (ii) the duration, which is considered a further stress factor on the ecosystem and is eventually combined with the intensity in an overall "severity" index (as in Hauri et al, 2013); and (iii) the local characteristic, which…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Extreme event waves in marine ecosystems: an application to Mediterranean Sea surface chlorophyll

et al. 2020

View full text Add to dashboard Cite

Abstract. We propose a new method to identify and characterise the occurrence of prolonged extreme events in marine ecosystems at the basin scale. There is growing interest in events that can affect ecosystem functions and services in a changing climate. Our method identifies extreme events as the peak occurrences over a predefined threshold (i.e. the 99th percentile) computed from a local time series, and it defines a series of extreme events that are connected over space and time as an extreme event wave (EEW). The main features of EEWs are then characterised by a set of novel indexes, related to initiation, extent, duration and strength. The indexes associated with the areas covered by each EEW were then statistically analysed to highlight the main features of the EEWs in the considered domain. We applied the method to a multidecadal series of winter–spring daily chlorophyll fields that was produced by a validated coupled hydrodynamic–biogeochemical model of the Mediterranean open-sea ecosystem. This application allowed us to identify and characterise surface chlorophyll EEWs in the period from 1994 to 2012. Finally, a fuzzy classification of EEW indexes provided bio-regionalisation of the Mediterranean Sea based on the occurrence of chlorophyll EEWs with different regimes.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extreme event waves in marine ecosystems: an application to Mediterranean Sea surface chlorophyll

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Vigorous international debate, stimulated by this work, now focuses on establishing the diagnostic signatures of storm wave versus tsunami wave activity on past and present hard rocky coasts worldwide (Hansom et al . 2015). Over a much longer timescale, Dawson et al .…”

Section: The Gcr and The Scientific Importance Of Quaternary Depositsmentioning

confidence: 99%

Advances in Quaternary studies and geomorphology in Scotland: implications for geoconservation

Gordon¹,

Brazier

Hansom³

et al. 2019

Earth and Environmental Science Transactions of the Royal Socie

Self Cite

View full text Add to dashboard Cite

Quaternary deposits and landforms are an integral component of Scotland's geodiversity and natural heritage with intrinsic, scientific, educational, cultural, aesthetic and ecological values. Their conservation is founded on the assessment and safeguard of key protected areas principally for their scientific values. The evaluation of site networks for Quaternary deposits and landforms (including glacial, fluvial, coastal, mass movement, karst and cave features) has evolved since the late 1940s, culminating in the Great Britain Geological Conservation Review (GCR) site assessments undertaken principally between 1977 and the early 1990s. Significant scientific progress since then has arisen, for example, from re-investigation of existing sites and discoveries of new sites, developments in geochronology and the formulation and application of new concepts and models. Both the GCR site lists and the supporting site documentation now require updating in the light of this progress. Today there is greater emphasis on the wider, non-scientific values of geoconservation including, for example, on ecosystem services, links with biodiversity and cultural heritage, geotourism and the benefits for human health and wellbeing through improved understanding of dynamic landscapes, climate change and natural hazards. Involvement of wider public support beyond the geoscience community and fostering better integration of geoheritage within the developing nature conservation agenda, including a land systems approach, protected area planning and management, natural capital and connecting people and nature, will help further to protect our Quaternary geoheritage.

show abstract

“…Extreme events affecting the Earth System have been widely investigated in hydrology and atmospheric sciences for several decades (e.g., Delaunay, 1988;Katz, 1999;Luterbacher et al, 2004;Allan and Soden, 2008;Perkins and Alexander, 2013;Tramblay et al, 2014). The study of extremes in the ocean has been concentrated mainly on the sea level (e.g., Zhang and Sheng, 2015), especially in relationship to hydrology (e.g., Walsh et al, 2012), but recently there has been interest also in extreme wave height (e.g., Hansom et al, 2014), current velocity (e.g., Green and Stigebrandt, 2003) and marine heat waves (e.g., Hobday et al, 2016). However, extreme events in biosphere properties like the marine biogeochemical concentrations have received relatively little attention in the past years, despite the related heavy impacts on marine ecosystems functions and services (e.g., Zhang et al, 2010), with cascading effects at larger scales on the biogeochemical cycles (e.g., Doney, 2010).…”

Section: Introductionmentioning

confidence: 99%

Characterisation of extreme events waves in marine ecosystems: the case of Mediterranean Sea

Biagio

Cossarini

Salon

et al. 2020

Preprint

View full text Add to dashboard Cite

<p><strong>Abstract.</strong> We propose a new method to identify and characterise the occurrence of prolonged extreme events in marine ecosystems on the basin scale. There is a growing interest about events that can affect ecosystem functions and services in a changing climate. Our method identifies extreme events as peak occurrences over 99th percentile thresholds computed from local time series and defines an Extreme Events Wave (EEW) as a connected region including these events. The EEWs are characterised by a set of novel indexes, referred to initiation, extent, duration and strength. The indexes, associated to the areas covered by each EEW, are then statistically analysed to highlight the main features of the EEWs on the considered domain. We applied the method to the winter-spring daily chlorophyll field of a validated multidecadal hindcast provided by a coupled hydrodynamic-biogeochemical model of the Mediterranean open-sea ecosystem, with 1/12&#176; horizontal resolution. This allowed to identify the maxima of chlorophyll as exceptionally high and prolonged <q>blooms</q> and to characterise their phenomenology in the period 1994&#8211;2012. A fuzzy k-means cluster analysis on the EEWs indexes provided a bio-regionalisation of the Mediterranean Sea associated to the occurrence of chlorophyll EEWs with different regimes.</p>

show abstract

Extreme Waves

Cited by 24 publications

References 56 publications

Extreme event waves in marine ecosystems: an application to Mediterranean Sea surface chlorophyll

Extreme event waves in marine ecosystems: an application to Mediterranean Sea surface chlorophyll

Advances in Quaternary studies and geomorphology in Scotland: implications for geoconservation

Characterisation of extreme events waves in marine ecosystems: the case of Mediterranean Sea

Contact Info

Product

Resources

About