Temperate cyclone

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Origin and Development of Temperate Cyclones Polar Front Theory • According to this theory, the warm-humid air masses from the tropics meet the dry-cold air masses from the poles and thus a polar front is formed as a surface of discontinuity. • Such conditions occur over sub-tropical high, sub-polar low pressure belts and along the Tropopause. • The cold air pushes the warm air upwards from underneath. Thus a void is created because of lessening of pressure. The surrounding air rushed in to occupy this void and coupled with the earth’s rotation, a cyclone is formed which advances with the westerlies (Jet Streams). In detail • In the northern hemisphere, warm air blows from the south and cold air from the north of the front. • When the pressure drops along the front, the warm air moves northwards and the cold air move towards south setting in motion an anticlockwise cyclonic circulation (northern hemisphere). This is due to Coriolis Force. • The cyclonic circulation leads to a well-developed extra tropical cyclone, with a warm front and a cold front. • There are pockets of warm air or warm sector wedged between the forward and the rear cold air or cold sector. The warm air glides over the cold air and a sequence of clouds appear over the sky ahead of the warm front and cause precipitation. • The cold front approaches the warm air from behind and pushes the warm air up. As a result, cumulus clouds develop along the cold front. The cold front moves faster than the warm front ...

In this blog let us learn the difference between tropical and temperate cyclones. Do you know who coined the term cyclone? The term Cyclone was first coined at Calcutta in AD 1848 by Henry Paddington. It is derived from the Greek word �Kyklos� meaning the coil of a snake. So what is a Cyclone? A cyclone represents a low-pressure system at the center surrounded by high pressure. Cyclones are common both in tropical and temperate regions. Difference Between Tropical and Temperate Cyclones The Tropical Cyclones The Tropical cyclones are seasonal and occur in the latter part of the summer season because of the movement of the Doldrum belt away from the Equator. They are actually of thermal origin, i.e. they are formed due to unequal heating of land and water. The air above the warm sea is heated and rises. This causes low pressure. The weather system produces heat which increases the wind speed. These cause the tropical cyclone to sustain themselves. These usually originate in the tropical region between 80 and 200N and S. Can you imagine how Tropical Cyclones look? They are mostly circular with low pressure in the center. They have strong winds blowing at the rate of 100-150 km/h are common. The center part of the storm is known as the eye of a cyclone. This area is usually calm with light winds, no rain, and a clear sky. Tropical cyclones are called by different names in different parts of the world. They are called Typhoons in the South China Sea, Hurricanes in the Caribbea...

In this article, You will read Temperate Cyclone ( Mid Latitude Cyclone or Extratropical cyclones or Frontal Cyclones) – for UPSC IAS (Geography). Before reading this article, You must read the concept of Temperate Cyclone • Temperate cyclones are storm systems emerging in the mid and high latitudes, away from the tropics, and They are low-pressure systems with associated cold fronts, warm fronts, and occluded fronts. • The systems developing in the mid and high latitude ( 35° latitude and 65° latitude in both hemispheres), beyond the tropics are called the Temperate Cyclones or Extra-Tropical Cyclones or Mid-Latitude Cyclones or Frontal Cyclones or Wave Cyclones. Polar Front Theory • According to this theory, the warm-humid air masses from the tropics meet the dry-cold air masses from the poles and thus a polar front is formed as a surface of discontinuity. • Such conditions occur over sub-tropical high, sub-polar low pressure belts and along the Tropopause. • The cold air pushes the warm air upwards from underneath. Thus a void is created because of lessening of pressure. The surrounding air rushed in to occupy this void and coupled with the earth’s rotation, a cyclone is formed which advances with the westerlies (Jet Streams). • In the northern hemisphere, warm air blows from the south and cold air from the north of the front. • When the pressure drops along the front, the warm air moves northwards and the cold air move towards the south setting in motion an anticlockwi...

• العربية • Asturianu • Català • Чӑвашла • Español • Euskara • فارسی • Français • Galego • 한국어 • Հայերեն • Bahasa Indonesia • Italiano • Қазақша • Lombard • მარგალური • Bahasa Melayu • Nederlands • 日本語 • Norsk bokmål • Norsk nynorsk • Português • Русский • Simple English • தமிழ் • ไทย • Türkçe • Українська • Tiếng Việt • 文言 • 中文 Surface pressure and wind distribution [ ] The windfield of an extratropical cyclone constricts with distance in relation to surface level pressure, with the lowest pressure being found near the center, and the highest winds typically just on the cold/poleward side of warm fronts, occlusions, and [ citation needed] The wind flow around an extratropical cyclone is cyclonic). Near this center, the pressure gradient force (from the pressure at the center of the cyclone compared to the pressure outside the cyclone) and the Coriolis force must be in an approximate balance for the cyclone to avoid collapsing in on itself as a result of the difference in pressure. In the northern hemisphere, once a cyclone occludes, a trough of warm air aloft—or "trowal" for short—will be caused by strong southerly winds on its eastern periphery rotating aloft around its northeast, and ultimately into its northwestern periphery (also known as the warm conveyor belt), forcing a surface trough to continue into the cold sector on a similar curve to the occluded front. The trowal creates the portion of an occluded cyclone known as its comma head, due to the Vertical structure...

Temperate Cyclones are also known as mid-latitude or frontal cyclones, are large-scale weather systems that occur in the middle latitudes of the Earth. These weather systems are crucial in determining the weather patterns in many regions of the world, including Europe, North America, and Asia. Understanding temperate cyclones is crucial in predicting and explaining the weather patterns in these regions. Temperate Cyclones Table of Contents • • • • Formation of Temperate Cyclones Temperate cyclones form when two air masses with different temperature and moisture characteristics meet and a front is formed. A front is a boundary between two air masses, and when it forms, it can lead to the development of clouds and precipitation. The formation of a temperate cyclone begins with a warm air mass moving into a cold air mass. As the warm air mass moves into the cold air mass, it lifts the cold air out of the way, leading to the formation of clouds and precipitation. This process creates a low-pressure area, which is the center of the temperate cyclone. Around the center of the temperate cyclone, winds circulate in a counter-clockwise direction in the Northern Hemisphere and in a clockwise direction in the Southern Hemisphere. This wind circulation, combined with the low-pressure area, helps to pull in air from the surrounding areas, causing the temperate cyclone to grow in size. Structure of Temperate Cyclones Temperate cyclones have a well-defined structure, with distinct featur...

LONDON, June 8(Reuters) - Countries are racing to prepare for extreme weather later this year as the world tips into an El Nino — a natural climate phenomenon that fuels tropical cyclones in the Pacific and boosts rainfall and flood risk in parts of the Americas and elsewhere. On Thursday, the U.S. National Oceanic and Atmospheric Administration (NOAA) declared that an El Nino is now underway. The past three years have been dominated by the cooler La Nina pattern. Scientists say this year looks particularly worrying. The last time a strong El Nino was in full swing, in 2016, the world saw its hottest year on record. Meteorologists expect that this El Nino, coupled with excess warming from climate change, will see the world Experts are also concerned about what is going on in the ocean. An El Nino means that waters in the Eastern Pacific are warmer than usual. But even before this El Nino began, in May, the average global sea surface temperature was about 0.1C (0.2F) higher than any other on record. That could supercharge extreme weather. "We're in unprecedented territory," said Michelle L'Heureux, a meteorologist with NOAA's Climate Prediction Center. Graphics to help explain on how El Nino works. Two diagrams showing climate patterns in the Pacific Ocean for neutral and el nino conditions. This year's El Nino could lead to global economic losses of $3 trillion, according to Governments in vulnerable countries are taking note. Peru has Here is how El Nino will unfold and s...