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Cyclone Pam (disambiguation)

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Last Updated: 18 January 2022

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Devastation after Cyclone Pam 14 March 2015.jpg "Devastation after Cyclone Pam 14 March 2015.jpg", by Humans of Vanuatu, licensed under CC BY-SA 3.0

In meteorology, cyclone is large scale air mass that rotates around strong center of low atmospheric pressure. Cyclones are characterized inward spiraling winds that rotate about zone of low pressure. Largest Low-pressure Systems Are Polar Vortices And Extratropical Cyclones Of Largest Scale. Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within synoptic scale. Mesocyclones, tornadoes, and devils lie within smaller mesoscale. Upper level cyclones can exist without presence of surface laws and can pinch off from base of tropical upper tropospheric trough during summer months in Northern Hemisphere. Cyclones have also seen on extraterrestrial planets, such as Mars, Jupiter, and Neptune. Cyclogenesis is process of cyclone formation and intensification. Extratropical cyclones begin as waves in large of enhanced mid-latitude temperature contrast call baroclinic zones. These zones contract form weather fronts as cyclonic circulation closes and intensifies. Later in their life cycle, extratropical cyclones occlude as cold air masses undercut air and become cold core systems. Cyclone's Track Is Guided Over Course Of Its 2 To 6 Day Life Cycle By Steering Flow Of Subtropical Jet Stream. Weather fronts mark boundary between two masses of air of different temperature, humidity, and densities, and are associated with most prominent meteorological phenomena. Strong cold fronts typically feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by lines or dry lines. Such fronts form west of circulation center and generally move from west to east; warm fronts form east of cyclone center and are usually preceded by stratiform precipitation and fog. Warm fronts move forward ahead of cyclone's path. Occluded fronts form late in cyclone's life cycle near center of cyclone and often wrap around storm center. Tropical cyclogenesis describes process of development of tropical cyclones. Tropical cyclones form due to latent heat driven by thunderstorm activity, and are warm core. Cyclones can transition extratropical, subtropical, and tropical phases. Mesocyclones form warm core cyclones over land, and can lead to tornado formation. Waterspouts can also form from mesocyclones, but more often develop from environments of high instability low vertical wind shear. In Atlantic and northeastern Pacific oceans, tropical cyclone is generally referred to as hurricane, in Indian and South Pacific oceans it is called cyclone, and in northwestern Pacific it is called typhoon. Growth Of Instability In Vortices Is Not Universal. For example, size, intensity, moist-convection, surface evaporation, value of potential temperature at each potential height can affect nonlinear evolution of vortex.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Structure

Pam damaged housing and infrastructure in Tuvalu, Kiribati, and New Zealand. Vanuatu was hit hardest. Humanitarian organizations report that some 50 to 90 percent of all homes, schools, churches, places of business, and other structures in country suffered some damage from storm, and wind and water have denuded many of countrys forestlands and croplands. Shortly after storms passing, United Nations Office For Coordination of Humanitarian Affairs, in conjunction with Government of Vanuatu, estimated that 166 000 people spread across 22 Islands need immediate food aid, since much of countrys livestock and poultry had been kill. In addition, many of Vanuatus water sources were contaminate, and most household vegetable gardens, upon which much of population depends for food, had been wiped out. Few people, however, lost their lives as direct result of storm. As of late March 2015, government of Vanuatu reported 11 deaths, whereas United Nations attributed 16 deaths to storm. No storm-related deaths reported in other countries. Other countries in region were significantly damaged but fared better than Vanuatu. Shortly after storm passed over Tuvalu, countrys prime minister, Enele Sopoaga, declared state of Emergency, noting that 45 percent of Tuvalus 9 900 people were displaced by storm, many because of storm surges and flooding, which damaged homes, contaminated drinking water, and killed livestock. Storm Also Damaged Hundreds Of Homes In Kiribati, Especially On Islands Of Arorae And Tamana, And Damaged Primary Causeway In Tarawa Atoll Connecting Betio Island With Bairiki. Flooding also damages shorelines New Zealands North Island and on Chatham Island.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Formation

March is quiet time for hurricanes in North Atlantic and eastern Pacific Oceans, but in mid-March 2015, halfway around world, tropics were bustling with Tropical cyclones. Two of them form under unique circumstances: one on either side of equator, at nearly same longitude, at nearly same timebasically, as twins. Give their eventual though, wed have to call them fraternal rather than identical twins. Animation Below Captures Activity In Tropics From March 8-18 2015. Satellite infrared View of clouds over Western Tropical Pacific from March 8-18 2015, based on data from Japanese Meterological Agency's MTSAT-2 satellite, overlay on NASA Blue Marble satellite image composite. Animation by Pisut, NOAA EVL. Change settings 720p or view full-size for best quality. Twin Tropical cyclones occur roughly once year and involve certain set of ingredients. In general, twin cyclones are preceded by areas of thunderstorms that straddle equator and which are associated with strong westerly winds. Imagine putting your finger into pool and moving it in straight line. You would swirls develop on either side of your finger. Same Concept Is At Play With Tropical Cyclones, It Is Just Mother Nature Stirring. Reason You Need Westerly Winds Is That Swirls That Develop From Burst Of Westerly Winds Spin Counter-clockwise In Northern Hemisphere And Clockwise In Southern Hemisphere. Because of Earth's rotation, these patterns are associated with formation of each hemisphere large low-pressure systems, including Tropical cyclones. In March, westerly winds were present along equator from beginning of month, with burst of stronger westerly winds on March 8, associated with developing storms. Shortly thereafter, Cyclone Pam was named in Southwest Pacific Ocean. Once it gets its act together, Pams location south of equator allows its clockwise circulation of winds to further enhance westerlies at equator. This enhancement helped to get Pams twin in Western North Pacific Ocean to strengthen enough to be named Tropical Storm Bavi. Together, these two storms help to maintain strong westerly winds across equatorial west Pacific for several additional days. After few days, storms began to make it clear that while they may have been twins, they were identical. Cyclone Pam find itself in environment much more favorable for development than Bavi. It was summer in Southern Hemisphere, and water temperatures were quite warm. As Pam trekked southward, that warmth helped storm develop into Category 5 Tropical Cyclone with estimated 165 mph winds by March 12. Storms path put right in its crosshairs. Pam brushed Islands of Vanuatu on March 13 at near-peak strength, causing substantial damages. Cyclone Pam passing over Vanuatu in Western Tropical Pacific on March 13 2015. Satellite image NASA Earth Observatory.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Sources

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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