{"id":91243,"date":"2025-06-01T10:50:48","date_gmt":"2025-06-01T10:50:48","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91243"},"modified":"2025-06-01T10:50:48","modified_gmt":"2025-06-01T10:50:48","slug":"in-the-south-atlantic-and-south-eastern-pacific-regions-in-tropical-la","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-the-south-atlantic-and-south-eastern-pacific-regions-in-tropical-la\/","title":{"rendered":"In the South Atlantic and South-Eastern Pacific regions in tropical la"},"content":{"rendered":"

In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason?<\/p>\n

[amp_mcq option1=”Sea surface temperatures are low” option2=”Inter-Tropical Convergence Zone seldom occurs” option3=”Coriolis force is too weak” option4=”Absence of land in those regions” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC IAS – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nTropical cyclones do not originate in the South Atlantic and South-Eastern Pacific tropical latitudes primarily because the sea surface temperatures are generally too low in these regions.
\n<\/section>\n
\nTropical cyclones require warm ocean waters (typically 26.5\u00b0C or higher) extending to a significant depth to provide the necessary heat and moisture. In the South-Eastern Pacific along the coast of South America, the cold Humboldt Current keeps the sea surface temperatures low. In the South Atlantic, cold currents (like the Benguela Current) and other factors like high vertical wind shear and unfavorable positioning of the ITCZ generally suppress tropical cyclone formation. While the ITCZ (option B) is also a factor, low sea surface temperature (option A) due to persistent cold currents is a fundamental constraint that prevents the formation or sustenance of tropical cyclones in significant parts of these tropical regions. Coriolis force (option C) is weak near the equator but sufficient in higher tropical latitudes; its weakness only explains the absence near the equator itself, not the entire regions. Absence of land (option D) over the ocean does not prevent cyclone formation.
\n<\/section>\n
\nOccasionally, tropical or subtropical storms can form in the South Atlantic under unusual conditions, but full-blown hurricanes or typhoons are extremely rare. The South-Eastern Pacific is also generally inactive due to the cold water. Most tropical cyclones form in the North Atlantic, Eastern\/Central\/Western North Pacific, North Indian Ocean, South Indian Ocean, and the Australian\/Southwest Pacific basins.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? [amp_mcq option1=”Sea surface temperatures are low” option2=”Inter-Tropical Convergence Zone seldom occurs” option3=”Coriolis force is too weak” option4=”Absence of land in those regions” correct=”option1″] This question was previously asked in UPSC IAS – 2015 Download PDFAttempt Online … <\/p>\n

Detailed SolutionIn the South Atlantic and South-Eastern Pacific regions in tropical la<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1443,1159,1106],"class_list":["post-91243","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1443","tag-cyclone","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nIn the South Atlantic and South-Eastern Pacific regions in tropical la<\/title>\n<meta name=\"description\" content=\"Tropical cyclones do not originate in the South Atlantic and South-Eastern Pacific tropical latitudes primarily because the sea surface temperatures are generally too low in these regions. Tropical cyclones require warm ocean waters (typically 26.5\u00b0C or higher) extending to a significant depth to provide the necessary heat and moisture. In the South-Eastern Pacific along the coast of South America, the cold Humboldt Current keeps the sea surface temperatures low. In the South Atlantic, cold currents (like the Benguela Current) and other factors like high vertical wind shear and unfavorable positioning of the ITCZ generally suppress tropical cyclone formation. While the ITCZ (option B) is also a factor, low sea surface temperature (option A) due to persistent cold currents is a fundamental constraint that prevents the formation or sustenance of tropical cyclones in significant parts of these tropical regions. Coriolis force (option C) is weak near the equator but sufficient in higher tropical latitudes; its weakness only explains the absence near the equator itself, not the entire regions. Absence of land (option D) over the ocean does not prevent cyclone formation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/in-the-south-atlantic-and-south-eastern-pacific-regions-in-tropical-la\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In the South Atlantic and South-Eastern Pacific regions in tropical la\" \/>\n<meta property=\"og:description\" content=\"Tropical cyclones do not originate in the South Atlantic and South-Eastern Pacific tropical latitudes primarily because the sea surface temperatures are generally too low in these regions. Tropical cyclones require warm ocean waters (typically 26.5\u00b0C or higher) extending to a significant depth to provide the necessary heat and moisture. In the South-Eastern Pacific along the coast of South America, the cold Humboldt Current keeps the sea surface temperatures low. In the South Atlantic, cold currents (like the Benguela Current) and other factors like high vertical wind shear and unfavorable positioning of the ITCZ generally suppress tropical cyclone formation. While the ITCZ (option B) is also a factor, low sea surface temperature (option A) due to persistent cold currents is a fundamental constraint that prevents the formation or sustenance of tropical cyclones in significant parts of these tropical regions. Coriolis force (option C) is weak near the equator but sufficient in higher tropical latitudes; its weakness only explains the absence near the equator itself, not the entire regions. Absence of land (option D) over the ocean does not prevent cyclone formation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-the-south-atlantic-and-south-eastern-pacific-regions-in-tropical-la\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:50:48+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"In the South Atlantic and South-Eastern Pacific regions in tropical la","description":"Tropical cyclones do not originate in the South Atlantic and South-Eastern Pacific tropical latitudes primarily because the sea surface temperatures are generally too low in these regions. Tropical cyclones require warm ocean waters (typically 26.5\u00b0C or higher) extending to a significant depth to provide the necessary heat and moisture. In the South-Eastern Pacific along the coast of South America, the cold Humboldt Current keeps the sea surface temperatures low. In the South Atlantic, cold currents (like the Benguela Current) and other factors like high vertical wind shear and unfavorable positioning of the ITCZ generally suppress tropical cyclone formation. While the ITCZ (option B) is also a factor, low sea surface temperature (option A) due to persistent cold currents is a fundamental constraint that prevents the formation or sustenance of tropical cyclones in significant parts of these tropical regions. Coriolis force (option C) is weak near the equator but sufficient in higher tropical latitudes; its weakness only explains the absence near the equator itself, not the entire regions. 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In the South Atlantic, cold currents (like the Benguela Current) and other factors like high vertical wind shear and unfavorable positioning of the ITCZ generally suppress tropical cyclone formation. While the ITCZ (option B) is also a factor, low sea surface temperature (option A) due to persistent cold currents is a fundamental constraint that prevents the formation or sustenance of tropical cyclones in significant parts of these tropical regions. Coriolis force (option C) is weak near the equator but sufficient in higher tropical latitudes; its weakness only explains the absence near the equator itself, not the entire regions. 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