Extreme Events
Extreme Events - Related Videos
09:00
Live Cell Imaging of Early Autophagy Events: Omegasomes and Beyond
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Cited by 13 •
2013
Time-lapse microscopy of fluorescently labeled autophagy markers allows monitoring of the dynamic autophagy response with high temporal resolution. Using specific autophagy and organelle markers in a combination of 3 different colors, we can follow the contribution of a protein to autophagosome formation in a robust spatial and temporal context.
01:22
Absolute and Local Extreme Values
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2026
The highest and lowest values of a function, relative to a reference axis, are known as extreme values. These include absolute maximum and absolute minimum values, which represent the highest and lowest points the function reaches across its entire domain. Within a restricted portion of the function, the highest and lowest values are referred to as local maximum and local minimum values, respectively.Periodic functions, such as sine and cosine, show extreme values at infinitely many points due...
14:33
Event-related Potentials and the Oddball Task
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California Given the overwhelming amount of information captured by the sensory organs, it is crucial that the brain is able to prioritize the processing of certain stimuli, to spend less effort on what might not be currently important and to attend to what is. One heuristic the brain uses is to ignore stimuli that are frequent or constant in favor of stimuli that are unexpected or unique. Therefore, rare events...
06:04
Upper-extremity Approach for Secondary Access in Transfemoral Transcatheter Aortic Valve Implantation
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Cited by 2 •
2025
An upper-extremity approach for secondary access during transfemoral transcatheter aortic valve implantation is associated with fewer secondary access site-related bleeding complications and reduces time to mobilization in patients requiring extended pacing. This protocol aims to provide an extensive overview of the upper-extremity approach and guide operators in adopting this methodology.
01:28
Integration of Synaptic Events
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2025
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
FAQs
Scientists set thresholds by examining how unusual an event is within observations and climate records, while also considering whether it produces meaningful impacts. Models help test patterns and estimate hazards, and comparisons with historical variability indicate whether an episode reflects expected natural fluctuations or a shift in background conditions. This combined approach makes classification more informative than intensity alone.
Persistent atmospheric circulation can maintain the same weather pattern long enough to compound heat, dryness, or precipitation. Elevated temperatures may intensify heat-related conditions, while intense precipitation can increase flood potential. For wildfires, dry fuels provide a key environmental condition. These interacting factors can push ecosystems and human systems beyond thresholds they normally tolerate.
Scientists evaluate an event against a reference climate rather than in isolation. They compare observations with climate records to identify unusual conditions and departures from natural variability. Models add evidence about patterns and hazards, but interpretation still depends on the selected statistical or impact threshold. This approach prevents every unusual observation from being treated as the same kind of extreme.
An event’s consequences depend on the system it affects, not only on the physical disturbance. Environmental analysis connects hazard characteristics with disruption to biodiversity, resources, infrastructure, and public health. This systems perspective helps explain why a heatwave, flood, drought, storm, or wildfire can create different outcomes when it affects different environmental and social settings.
Analysis combines direct observations, climate records, and models. Records establish environmental background conditions and reveal unusual patterns; observations document what occurred; and models support pattern detection and hazard estimation. Scientists then evaluate the evidence against statistical or impact thresholds and distinguish natural variability from changing background conditions. The resulting assessment can inform warnings, risk studies, and planning.
Extreme-event research supplies hazard estimates and pattern information for early-warning systems. Scientists examine observations and model results to recognize conditions associated with heatwaves, floods, droughts, storms, or wildfires, then relate those conditions to defined thresholds. The practical outcome is earlier awareness of potential disruption, supporting preparation by communities, environmental managers, and planners.
They provide a framework for linking physical hazards with ecological and societal consequences. Environmental managers can use extreme-event analysis to assess risks to biodiversity and resources, while planners consider infrastructure and public health. The same evidence supports ecosystem management and adaptation planning, making the topic relevant to environmental protection and decisions about human systems.