Health

The case for embedding equity into incident command at hospitals

During recent large-scale disasters, including the COVID-19 pandemic and major hurricanes, many hospitals and health care systems have activated their Hospital Incident Command System (HICS) to clarify roles and responsibilities ...

Psychology & Psychiatry

Lessons from Katrina on how pandemic may affect kids

Hurricane Katrina caused widespread destruction and more than 1,800 deaths in 2005, much of it in New Orleans. Though a tragedy, psychologists recognized the storm and its aftermath provided an opportunity to better understand ...

Psychology & Psychiatry

Youth exposed to natural disasters report low post-traumatic stress

A study of over 1,700 U.S. young people exposed to four major hurricanes found that just a few of them reported chronic stress, and the trajectories among most youth reflected recovery or low-decreasing post-traumatic stress ...

Psychology & Psychiatry

COVID-19 pandemic creates new causes of 'workplace' stress

The global COVID-19 pandemic has created new causes of job-related stress that have displaced the "traditional" main reason for workplace anxiety—ever-increasing workloads, according to new research.

Diseases, Conditions, Syndromes

COVID-19 and hurricane season could be deadly mix

(HealthDay)—A hurricane is bearing down on your coastal community, bringing with it deadly storm surge flooding and airborne debris propelled by high winds.

page 1 from 12

Tropical cyclone

A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones feed on heat released when moist air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic windstorms such as nor'easters, European windstorms, and polar lows, leading to their classification as "warm core" storm systems. Tropical cyclones originate in the doldrums near the equator, about 10° away from it.

The term "tropical" refers to both the geographic origin of these systems, which form almost exclusively in tropical regions of the globe, and their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with counterclockwise rotation in the Northern Hemisphere and clockwise rotation in the Southern Hemisphere. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone.

While tropical cyclones can produce extremely powerful winds and torrential rain, they are also able to produce high waves and damaging storm surge as well as spawning tornadoes. They develop over large bodies of warm water, and lose their strength if they move over land. This is why coastal regions can receive significant damage from a tropical cyclone, while inland regions are relatively safe from receiving strong winds. Heavy rains, however, can produce significant flooding inland, and storm surges can produce extensive coastal flooding up to 40 kilometres (25 mi) from the coastline. Although their effects on human populations can be devastating, tropical cyclones can also relieve drought conditions. They also carry heat and energy away from the tropics and transport it toward temperate latitudes, which makes them an important part of the global atmospheric circulation mechanism. As a result, tropical cyclones help to maintain equilibrium in the Earth's troposphere, and to maintain a relatively stable and warm temperature worldwide.

Many tropical cyclones develop when the atmospheric conditions around a weak disturbance in the atmosphere are favorable. The background environment is modulated by climatological cycles and patterns such as the Madden-Julian oscillation, El Niño-Southern Oscillation, and the Atlantic Multi-Decadal Mode. Others form when other types of cyclones acquire tropical characteristics. Tropical systems are then moved by steering winds in the troposphere; if the conditions remain favorable, the tropical disturbance intensifies, and can even develop an eye. On the other end of the spectrum, if the conditions around the system deteriorate or the tropical cyclone makes landfall, the system weakens and eventually dissipates. It is not possible to artificially induce the dissipation of these systems with current technology.

This text uses material from Wikipedia, licensed under CC BY-SA