{"id":254,"date":"2020-12-03T09:15:14","date_gmt":"2020-12-03T09:15:14","guid":{"rendered":"https:\/\/nirmalkularathne.com\/?p=254"},"modified":"2022-12-27T14:32:41","modified_gmt":"2022-12-27T09:02:41","slug":"formation-of-cyclones","status":"publish","type":"post","link":"https:\/\/nirmalkularathne.com\/index.php\/2020\/12\/03\/formation-of-cyclones\/","title":{"rendered":"Cyclones, How Do They Form?"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">You may have heard meteorologists use the words cyclones, hurricanes, and typhoons. All these three words are used to explain the same scenario but it changes from the location where the events occur.<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\">\n<li>Hurricanes &#8211; Atlantic &amp; North East Pacific<\/li>\n\n\n\n<li>Typhoons &#8211; North West Pacific<\/li>\n\n\n\n<li>Cyclones &#8211; South Pacific &amp; Indian Ocean<\/li>\n<\/ul>\n\n\n\n<p class=\"has-medium-font-size\">Other than that, the major difference between the above three is that Hurricanes and Typhoons (Which occur in the northern hemisphere) rotate in a counterclockwise direction, while Cyclones (Which occur in the southern hemisphere) rotate in a clockwise direction.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/7c6c5291-b151-4a27-9bc0-35b6c02e9bfb-1024x568.png\" alt=\"\" class=\"wp-image-256\" width=\"572\" height=\"316\" srcset=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/7c6c5291-b151-4a27-9bc0-35b6c02e9bfb-1024x568.png 1024w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/7c6c5291-b151-4a27-9bc0-35b6c02e9bfb-300x166.png 300w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/7c6c5291-b151-4a27-9bc0-35b6c02e9bfb-768x426.png 768w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/7c6c5291-b151-4a27-9bc0-35b6c02e9bfb.png 1440w\" sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/><figcaption class=\"wp-element-caption\">Image Credit &#8211; CNN World ( <a href=\"https:\/\/cnn.it\/3ofRNY0\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/cnn.it\/3ofRNY0<\/a> )<\/figcaption><\/figure>\n<\/div>\n\n\n<h4 class=\"has-large-font-size wp-block-heading\">Three Stages of Cyclones<\/h4>\n\n\n\n<p class=\"has-medium-font-size\">Cyclones are categorized into 3 main stages based on wind speed. Those are as follows.<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\">\n<li>Tropical Cyclone: Speed is less than 74 Miles Per Hour (&lt;120 km\/h)<\/li>\n\n\n\n<li>Severe Cyclone: Speed is between 75 &#8211; 120 Miles Per Hour (120 km\/h &#8211; 194 km\/h)<\/li>\n\n\n\n<li>Super Cyclone: Speed is more than 120 Miles Per Hour (&gt;195km\/h)<\/li>\n<\/ul>\n\n\n\n<h4 class=\"has-large-font-size wp-block-heading\">Origin of a Cyclone<\/h4>\n\n\n\n<h5 class=\"has-medium-font-size wp-block-heading\">Atmospheric Pressure<\/h5>\n\n\n\n<p class=\"has-medium-font-size\">This can be defined as the amount of weight applied by the earth&#8217;s atmosphere on the underlying earth&#8217;s surface as a result of gravity. <\/p>\n\n\n\n<p class=\"has-medium-font-size\">This value is not the same everywhere on the earth, it varies because the density of the earth&#8217;s atmosphere differs from place to place. The magnitude of the atmospheric pressure decreases with the altitude because the density of the atmosphere decreases. Therefore the highest atmospheric pressure can be experienced on the earth&#8217;s surface. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/f-d-c50e02938e0884cfa8b93aab65d16efaac1f11330287d1bbf7edd31bIMAGE_THUMB_POSTCARD_TINYIMAGE_THUMB_POSTCARD_TINY.1.jpg\" alt=\"\" class=\"wp-image-260\" width=\"325\" height=\"334\" srcset=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/f-d-c50e02938e0884cfa8b93aab65d16efaac1f11330287d1bbf7edd31bIMAGE_THUMB_POSTCARD_TINYIMAGE_THUMB_POSTCARD_TINY.1.jpg 488w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/f-d-c50e02938e0884cfa8b93aab65d16efaac1f11330287d1bbf7edd31bIMAGE_THUMB_POSTCARD_TINYIMAGE_THUMB_POSTCARD_TINY.1-293x300.jpg 293w\" sizes=\"auto, (max-width: 325px) 100vw, 325px\" \/><figcaption class=\"wp-element-caption\">Image Credit &#8211; <a href=\"https:\/\/bit.ly\/37nyMvO\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/bit.ly\/37nyMvO<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"has-medium-font-size\">The following figure shows the global anomaly of mean air pressure variation in November 2020.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/pppmap_mean_2020_11.png\" alt=\"\" class=\"wp-image-259\" width=\"518\" height=\"366\" srcset=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/pppmap_mean_2020_11.png 800w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/pppmap_mean_2020_11-300x212.png 300w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/pppmap_mean_2020_11-768x543.png 768w\" sizes=\"auto, (max-width: 518px) 100vw, 518px\" \/><figcaption class=\"wp-element-caption\">Credit: <a href=\"https:\/\/bit.ly\/3g07TlM\">https:\/\/bit.ly\/3g07TlM<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<h5 class=\"has-large-font-size wp-block-heading\">How does a Variation in Atmospheric Pressure Causes a Cyclone? <\/h5>\n\n\n\n<p class=\"has-medium-font-size\">Cyclones originate in places where atmospheric pressure is low over a large water body when the temperature of the water rises over 26.5\u00b0C, but how? Generally, a water body large enough for such a scenario can be found in oceans. When the atmospheric pressure gets comparatively low over a certain area of an ocean, the warm air near the water&#8217;s surface (due to the high temperature of the water) rises to fill the gaps and cold air goes down because it contains moisture (comparatively heavy particles).<\/p>\n\n\n\n<p class=\"has-medium-font-size\">The warm air reaches a place where they get even warmer and keeps rising up, which creates more and more gaps in the atmosphere. To fill these gaps, surrounding air rushes in. These air particles which come to fill the gaps travel from longer distances at greater speeds. When these air particles reach the area with low air pressure, instead of filling the gaps they start rotating creating a spiral. After that, any air that travels to fill the gaps has to join this spiral because those particles cannot pass the already established spiral directly.<\/p>\n\n\n<div class=\"wp-block-image is-style-rounded\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"358\" src=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/Capture-1024x358.jpg\" alt=\"\" class=\"wp-image-264\" srcset=\"https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/Capture-1024x358.jpg 1024w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/Capture-300x105.jpg 300w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/Capture-768x269.jpg 768w, https:\/\/nirmalkularathne.com\/wp-content\/uploads\/2020\/12\/Capture.jpg 1184w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-medium-font-size\">This spiral of air eventually grows into a cyclone with a very high diameter, where a large amount of air rushes in to fill the gaps in the atmosphere. In general, a tropical cyclone has a diameter from 100km &#8211; 2000km and it can grow up to a height of 10km, where the surrounding clouds start to rotate around it creating a thunderstorm. Also, tropical cyclones can last between 3 &#8211; 7 days depending on their speed, the distance to land, and their diameter. <\/p>\n\n\n\n<script type=\"text\/javascript\">\namzn_assoc_placement = \"adunit0\";\namzn_assoc_search_bar = \"true\";\namzn_assoc_tracking_id = \"kittydoggo-20\";\namzn_assoc_search_bar_position = \"bottom\";\namzn_assoc_ad_mode = \"search\";\namzn_assoc_ad_type = \"smart\";\namzn_assoc_marketplace = \"amazon\";\namzn_assoc_region = \"US\";\namzn_assoc_title = \"Shop Related Products\";\namzn_assoc_default_search_phrase = \"Extreme weather events\";\namzn_assoc_default_category = \"Books\";\namzn_assoc_linkid = \"2ae648db1866e71f6b81277ec12d722a\";\namzn_assoc_default_browse_node = \"283155\";\n<\/script>\n<script src=\"\/\/z-na.amazon-adsystem.com\/widgets\/onejs?MarketPlace=US\"><\/script>\n\n\n\n<h4 class=\"has-large-font-size wp-block-heading\">Death of a Cyclone<\/h4>\n\n\n\n<p class=\"has-medium-font-size\">Cyclones usually die when they cross a land area. The reason for this is that when a cyclone crosses a land surface or a cold water body, the main source of the cyclone, which is warm water has taken away and because of that the cyclone dies.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">So I would like to leave two questions for you to answer at the end of this article.<\/p>\n\n\n\n<ol class=\"has-medium-font-size wp-block-list\">\n<li>Why cyclones usually don&#8217;t occur in the Arctic Ocean?<\/li>\n\n\n\n<li>How Global Warming can increase the frequency of the occurrence of cyclones.<\/li>\n<\/ol>\n\n\n\n<p class=\"has-medium-font-size\">Don&#8217;t forget to send what you think about that via Twitter or as a comment below. Thank You for reading this article.<\/p>\n\n\n\n<p>Featured Image Credit: NASA-NOAA\u2019s Suomi NPP satellite<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You may have heard meteorologists use the words cyclones, hurricanes, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":255,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate"],"_links":{"self":[{"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/posts\/254","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/comments?post=254"}],"version-history":[{"count":11,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/posts\/254\/revisions"}],"predecessor-version":[{"id":1141,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/posts\/254\/revisions\/1141"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/media\/255"}],"wp:attachment":[{"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/media?parent=254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/categories?post=254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nirmalkularathne.com\/index.php\/wp-json\/wp\/v2\/tags?post=254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}