{"id":91491,"date":"2025-06-01T10:57:43","date_gmt":"2025-06-01T10:57:43","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91491"},"modified":"2025-06-01T10:57:43","modified_gmt":"2025-06-01T10:57:43","slug":"with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/","title":{"rendered":"With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th"},"content":{"rendered":"

With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is\/are correct?
\n1. IOD phenomenon is characterised by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.
\n2. An IOD phenomenon can influence an El Nino\u2019s impact on the monsoon.
\nSelect the correct answer using the code given below:<\/p>\n

[amp_mcq option1=”1 only” option2=”2 only” option3=”Both 1 and 2″ option4=”Neither 1 nor 2″ correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC IAS – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nStatement 2 is correct, while statement 1 is incorrect.
\n<\/section>\n
\n– Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. It is characterised by a difference in sea surface temperature between a western pole in the Arabian Sea (western tropical Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia. The statement incorrectly mentions the Eastern Pacific Ocean, which is associated with El Ni\u00f1o-Southern Oscillation (ENSO).
\n– Statement 2 is correct. The IOD is a significant climate driver for countries around the Indian Ocean, including influencing the Indian monsoon. IOD and ENSO are two separate climate phenomena, but they can interact and influence each other’s impact on regional weather patterns, including the Indian monsoon. A positive IOD, for instance, is often associated with a good monsoon in India and can sometimes counteract the negative impact of an El Ni\u00f1o event.
\n<\/section>\n
\nA ‘positive IOD’ occurs when the western Indian Ocean is warmer and the eastern Indian Ocean is colder than average. A ‘negative IOD’ is the opposite. The IOD is often called the “Indian Ni\u00f1o” because of its similarity to the Pacific El Ni\u00f1o phenomenon.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is\/are correct? 1. IOD phenomenon is characterised by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean. 2. An IOD phenomenon can influence an El Nino\u2019s impact … <\/p>\n

Detailed SolutionWith reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th<\/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":[1101,1106,1135],"class_list":["post-91491","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1101","tag-world-and-physical-geography","tag-world-climate","no-featured-image-padding"],"yoast_head":"\nWith reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th<\/title>\n<meta name=\"description\" content=\"Statement 2 is correct, while statement 1 is incorrect. - Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. It is characterised by a difference in sea surface temperature between a western pole in the Arabian Sea (western tropical Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia. The statement incorrectly mentions the Eastern Pacific Ocean, which is associated with El Ni\u00f1o-Southern Oscillation (ENSO). - Statement 2 is correct. The IOD is a significant climate driver for countries around the Indian Ocean, including influencing the Indian monsoon. IOD and ENSO are two separate climate phenomena, but they can interact and influence each other's impact on regional weather patterns, including the Indian monsoon. A positive IOD, for instance, is often associated with a good monsoon in India and can sometimes counteract the negative impact of an El Ni\u00f1o event.\" \/>\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\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th\" \/>\n<meta property=\"og:description\" content=\"Statement 2 is correct, while statement 1 is incorrect. - Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. It is characterised by a difference in sea surface temperature between a western pole in the Arabian Sea (western tropical Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia. The statement incorrectly mentions the Eastern Pacific Ocean, which is associated with El Ni\u00f1o-Southern Oscillation (ENSO). - Statement 2 is correct. The IOD is a significant climate driver for countries around the Indian Ocean, including influencing the Indian monsoon. IOD and ENSO are two separate climate phenomena, but they can interact and influence each other's impact on regional weather patterns, including the Indian monsoon. A positive IOD, for instance, is often associated with a good monsoon in India and can sometimes counteract the negative impact of an El Ni\u00f1o event.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:57:43+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th","description":"Statement 2 is correct, while statement 1 is incorrect. - Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. It is characterised by a difference in sea surface temperature between a western pole in the Arabian Sea (western tropical Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia. The statement incorrectly mentions the Eastern Pacific Ocean, which is associated with El Ni\u00f1o-Southern Oscillation (ENSO). - Statement 2 is correct. The IOD is a significant climate driver for countries around the Indian Ocean, including influencing the Indian monsoon. IOD and ENSO are two separate climate phenomena, but they can interact and influence each other's impact on regional weather patterns, including the Indian monsoon. A positive IOD, for instance, is often associated with a good monsoon in India and can sometimes counteract the negative impact of an El Ni\u00f1o event.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/","og_locale":"en_US","og_type":"article","og_title":"With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th","og_description":"Statement 2 is correct, while statement 1 is incorrect. - Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. 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A positive IOD, for instance, is often associated with a good monsoon in India and can sometimes counteract the negative impact of an El Ni\u00f1o event.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:57:43+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/","url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-indian-ocean-dipole-iod-sometimes-mentioned-in-th\/","name":"With reference to \u2018Indian Ocean Dipole (IOD) sometimes mentioned in th","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:57:43+00:00","dateModified":"2025-06-01T10:57:43+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement 2 is correct, while statement 1 is incorrect. - Statement 1 is incorrect. The Indian Ocean Dipole (IOD) is an irregular oscillation of sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean. It is characterised by a difference in sea surface temperature between a western pole in the Arabian Sea (western tropical Indian Ocean) and an eastern pole in the eastern Indian Ocean south of Indonesia. The statement incorrectly mentions the Eastern Pacific Ocean, which is associated with El Ni\u00f1o-Southern Oscillation (ENSO). - Statement 2 is correct. The IOD is a significant climate driver for countries around the Indian Ocean, including influencing the Indian monsoon. IOD and ENSO are two separate climate phenomena, but they can interact and influence each other's impact on regional weather patterns, including the Indian monsoon. 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