Question 3. (B) an oceanic current There is no apparent current within this ring of currents in the centre of the Atlantic. In the past, tsunamis were sometimes referred to as "tidal waves" by the general public, and as "seismic sea waves" by the scientific community. https://www.britannica.com/science/monsoon. The strongest monsoons tend to occur in India and South Asia in the north and Australia and Malaysia in the south. During a summer monsoon, the region experiences winds from the south, which carry moisture from the Pacific Ocean and the Gulf of California. Jul. Let us know if you have suggestions to improve this article (requires login). Indian Ocean. The Barzil-Malvinas Confluence zone is created by the mixing of the Falkland cold current and the warm Brazil current. The poleward limits of monsoon systems are often sites of sharp changes in wind direction. In each period, the amount of rain received is higher than average resulting in many floods or lower than average resulting in droughts. The ocean's response time - or. The correct answer is Option 4i.e. What explains the Eastward flow of the equatorial counter-current? The Short Answer: A monsoon is a shift in winds that often causes a very rainy season or a very dry season. Most tsunamis are caused by earthquakes generated in a. Influence of geographical Orientation: Crustal land masses block and affect the course of a current due to their geographical orientation. Flood Management in India, Mitigation st Public Sector Undertakings in India, Typ for UPSC 25 July 2023, Daily Current Affairs for UPSC 25 July 2023, Editorial of the Day: A big step in reducing the risk of disasters (The Hindu), Global Report on the Food Crises (GRFC) 2023, Current Affairs 25th July 2023 for UPSC Prelims Exam. Below is the Map of Various Ocean Currents: Ocean Currents Cold Ocean . When winds and currents along the Equator become westward, the sea-surface will (eventually) slope up to the west, and the thermocline slope down to the west; when winds and currents along the Equator are eastward, the sea-surface will (eventually) slope up to the east, and the thermocline slope down to the east. (B) Brazil Ocean Currents, Map, Meaning, Types, Causes, Effects, Diagram Speed and strength of ocean currents are deeply impacted by the occurrence of El Nino events. What intense surface current feature appears between the monsoons (Figure 5.12(c) and il l)? [Solved] Ocean waves Currents Tides & Tsunamis MCQ [Free PDF This large marine ecosystem which serves as the major nutrient system of the world is supported by this very low-salinity current. Although monsoons are usually associated with parts of Asia, they can happen in many tropical and subtropical regions - including several locations in the United States. Question 17. The Florida current flows around Florida Peninsula and joins the Gulf Stream at Cape Hatteras. During the dry winter monsoon seasons, it is believed that the land will become drier as evaporation increases in warmer temperatures. The current is characterised by high upwelling, the presence of an excellent fishing zone and low salinity. A 1 and 2 B 2 and 3 C 1, 3 and 4 D 2, 3 and 4 Medium Solution Verified by Toppr Correct option is C) The Humboldt Current, also called the Peru Current, is a cold, low-salinity ocean current. (C) Difference in salinity of water If you were swimming in the ocean whose temperature was 70 F and you swam into a current whose temperature was 60 F, the sensation would be cold. Thats when afternoon thunderstorms are most frequent and severe. Which among the following is not a cold ocean current ? Gravity tends to pull the water down to pile and create gradient variation. The Peruvian Current, for example, is formed when part of the West Wind Drift is diverted northwards by the tip of southern Chile. When approximately half of India's population works in agriculture and agriculture makes up eighteen percent of India's GDP, according to Stratfor, for example, the shifting in both timing of a monsoon and the amount of rain, can lead to big problems. Unlike the Atlantic and Pacific, both of which have strong currents circulating clockwise north of the Equator, the northern Indian Ocean has surface currents that change with the seasonal monsoon. b. Brazil current c. Monsoon Drift d. Density of water d. West wind drift is a cold southern hemisphere ocean current that runs west to east, generally between 40 and 60 degrees south latitude. Correlate it to the Atlantic currents if you can. Rotation of the Earth 1. (D) 2, 3 and 4. Thunderstorms - with lightning and flash flooding . Summary Names, direction, nature.and what not! Winter monsoons in these regions near the Indian Ocean are usually dry. (c) Peru Current During much of the year, the strongest winds over northwestern Mexico, Arizona and New Mexico are dry air blowing from the west. View solution > The oceanic currents flowing towards the Equator are _____. Where is its location? The water of Earthcloser to the moon is drawn under the influence of the gravitational force of the moon which creates a high tide. a. Tides. (C) Norway Thus, we can say thatthe Agulhas current is not a cold ocean current. The average wind speeds in Meghalaya during peak summer monsoon season average 4 kilometers per second and typically vary between 1 and 7 kilometers per hour, according to Meteoblue. Tides are demarcated as the rise and fall of the sea level. The Antilles current flows across the island chain which separates the Atlantic Ocean and the Caribbean Sea. This is a typical monsoon pattern for this region. Do. For example, at the beginning of summer, the land warms up faster than bodies of water. Based on these currents influence on the destination, they are classified as warm ocean currents and cold ocean currents. (C) Oyashio Though the term equatorial has been used, it has no relation with the Equator. Climatic patterns reminiscent of monsoons also occur in areas outside of the prominent monsoon regions. It is similar to the Gulf Stream in the Atlantic Ocean as it is in the Pacific Ocean. While the monsoon in North America is not as strong as those in India due to a lower and smaller plateau, the same patterns are followed. Which of the following can cause a Tsunami? (B) Benguela current Which of the following are cold ocean currents? - Toppr Gulf Stream. (b) West Wind Drift They make up the other 90 percent of the ocean water. (A) Canary current None of the above/More than one of the above. the loop retreats lo its mosl easterly position, and the cycle repeats, Continue reading here: The Southern Ocean, Simple Energy Hack Kills Power Bills And Generates Power On Demand. Tracking the movement of a monsoon from space helps people down on Earth to plan for safety during storms, and also to anticipate the storms impact on their water supply. 2. North Equatorial Current | Britannica Typically, monsoon season is the months of July, August, and September. The intensity and duration of these rains, however, are not uniform from year to year. In general, the North American Monsoon begins each year in Mexico in June. Monsoon season in North America brings rainfall primarily to northern Mexico, Arizona, and New Mexico, and to a smaller extent to parts of Utah, Colorado, southern California and Baja California, according to the National Oceanic and Atmospheric Administration (NOAA). The Benguela Current forms the Eastern portion of the South Atlantic Ocean Gyre. Two large eddies are formed, known as Haida Eddies and Sitka Eddy. While studying for her undergraduate degree, Rachel also taught an introduction to astronomy lab and worked with a research astronomer. The westerlies are, however, less reliable than the Trade Winds.. This leads to a dry period. This is usually in tropical and subtropical climates. Cold currents may cool the air and deliver colder temperatures to the ground. The North American Monsoon System also brings the start of the fire season in the southwestern United States and northern Mexico, according to 2004 NOAA report due to the increased amount of lightning brought on by pressure and temperature changes. The current flows in a clockwise direction from east to west around Antarctica. The North Indian Ocean has the best evidence of the prevailing winds impact on the current flows. Wind and rainfall patterns of the Australian monsoon. The term "seismic sea wave" is also misleading. Which of the following is a cold current? a} gulf stream - Brainly.com The tings are eddies which form from the loop when it extends westwards towards the Atlantic: when an eddy pinches off. The most prominent monsoons occur in South Asia, Africa, Australia, and the Pacific coast of Central America. For example, current speeds in the Equatorial Jet ((c),(f)) may reach 1.0-1.3ms"1, but are mostly 0.3-0.7ms~1. They are similar to river flows in oceans. Density of ocean water A massive amount of drifting seaweed forms the Sargasso Sea. We are not permitting internet traffic to Byjus website from countries within European Union at this time. Gurugram - 122002. Central & East-Central Equatorial Pacific. With weather satellites, of course! distortion of equatorial atmospheric circulation; These bring coldwater into warm water areas. The Brazilian current joins the cold Falkland Current at the Argentine Sea making it a temperate sea. For Example, in the partially enclosed Mediterranean Sea, there is a great difference in salinity between the waters of the open Atlantic Ocean and those of the Mediterranean Sea. The North-East Monsoon is most fully established from January to March ( (a), (b)), and the South-West Monsoon is most fully established during July-September ( (d), (e)). Consider the following factors. Check more about Ocean Currents, Map, Meaning, Types, Causes, Effects for UPSC exam preparation. (C) North Atlantic Ocean Ocean current | Distribution, Causes, & Types | Britannica (D) Nigera. (A) Indian Ocean is half an Ocean (B) Indian Ocean has Monsoon drift (C) Indian Ocean is a land-locked ocean (D) Indian Ocean has greater variation in salinity Answer : B Question 2. Knowing how to prepare and plan your visit, as well as what to look for, is important to have a safe and enjoyable adventure. A warm stream is one that travels towards the pole in both hemispheres and transports warm water from lower to upper latitudes. Oceanic currents describe the movement of water from one location to another. The Canaries Current, which flows southward, finally combines with the North Equatorial Current, completing the clockwise circuit in the North Atlantic Ocean. Example: Monsoon winds are responsible for the seasonal reversal of ocean currents in the Indian ocean. These are called spring tides and they occur twice a month, one during the full moon period and another during the new moon period. The North-East Monsoon is most fully established from January to March ((a),(b)), and the South-West Monsoon is most fully established during July-September ((d),(e)). More than 50% of the annual rain in Arizona and New Mexico falls during summer monsoon season, from July to September. The El Nino, a cold ocean current, flows along the coast of Peru during Christmas. Which of the following pair of oceanic currents is shown in the given map? It is an opening in the surface of the earth'scrust through which lava, volcanic ash, rocks, and gases escape. (A) Peruvian Current (Hamboldt Current) Question 5. Well, you might have heard so many names like Kuroshio current, Oyashio current, Peru current etc. Credit: NOAA/JPL. The current is named after the Danish vice-admiral Carl Ludvig Christian Irminger. However, this can depend on the specific species of fish and local conditions, so it's not a universal rule. What Are Monsoons and Why Do They Happen? - Center for Science Education The average surface temperature of the current is warmer than the surrounding ocean. Gulf current, an ocean current, occurs in which of the following oceans? In northern Australia the monsoon arrives from the northwest during January-February. At this time the sun and moon are at right angles to each other and the forces of the sun and moon tend to counteract one another. Question 15. (a) Gulf stream (c) crest (b) (c) Monsoon drift (d) What is the main cause for the occurrence of tides? 6 Main Currents in the Indian Ocean | Ocean | Geography During winter, the flow of the upper ocean is directed westward from near the Indonesian Archipelago to the Arabian Sea. This is an intensified current driven mainly by wind stress. As a result, the water in the Bay of Bengal and the Arabian Sea move eastwards in a clockwise manner and the South West Monsoon Drift current is formed. Monsoon - Wikipedia 4. In central Europe, where the average wind direction in summer differs some 30 to 40 from that of the Atlantic, there are monsoonal tendencies that occur not as a continuous flow but rather intermittently within frontal depressions, bringing cool, cloudy weather, rain, and thunderstorms. This is also responsible for the regions temperate climate. Chapter 7 Oceanography Flashcards | Quizlet Winds are described by the direction from which they blow . The site owner may have set restrictions that prevent you from accessing the site. Appropriate shelter is a building with walls, a roof, and a floor. Your email address will not be published. The result is a period of humidity and heavy rainfall that can last for months. (B) Kuroshio Smell the rain-soaked dirt and watch plants and flower come back to life. Much of this research is going into how to better predict future and current rainfalls and winds, such as described in an article published in 2015 on Science Daily from the Office of Naval Research. Less electricity is being produced sometimes leading to electricity only being provided to large businesses or the wealthiest families due to increased costs. (B) The Pacific Ocean Select the correct answer using the code given below-. These tides are called. Updates? The rise and fall of water due to tides is being used in some placesto generateelectricity. ; It is the displaced water that influences the air, either warming or chilling it, so conveying the same impact to the ground area over which it blows. 5 Planetary Alignment, Details, Occurren 7 Continents of the World, Name, Map, Im Adriatic Sea, Map, Bordering Countries, Aegean Sea, Map, Bordering Countries, Ge Aeolian Landforms, Types, Examples, List Air Pollution Causes, Effects, Sources, Kargil Vijay Diwas 2023, Date, History and Significance, Case Study of the Day: Pashu Sakhi An alternative livestock extension approach, Difference Between Fundamental Rights and Fundamental Duties, Kyoto Protocol, Objectives, History, Principle and Features, UPSC Mains Syllabus PDF, Syllabus for UPSC Mains Subject wise, The Hindu Newspaper Analysis 25 July 2023, for UPSC 24 July 2023, Daily Current Affairs for UPSC 24 July 2023, Intellectual Property Rights Source Links, Semiconductor & Laser Technology Source Links, Science and Technology in India Source Links, Case Study of the Day: Poosarlapadu Organic Village, Editorial of the Day: Dilemmas of Indias great power ambitions (The Hindu), Biomolecules and Metabolites Source Links, Difference Between Fundamental Rights and Directive Principles of State Policy, Chandra Shekhar Azad, Biography, Contribution and Legacy. (D) Benguela and Guinea. Under the influence of the Coriolis force, the earths rotation deflects freely moving objects to the right, including ocean currents. Credit: NOAA/JPL. The circle is anti-clockwise, and the gathering of seaweed in the calm seas of the mid-South Atlantic is not as noticeable. Conditions change rapidly and sometimes without much warning. Additional InformationList of Ocean Currents of the World: The rhythmic rise and fall of ocean water twice in a day is called ______. D) Surface currents form circular patterns in the major ocean basins called "gyres." E) Surface currents concentrate warm water in the center of the gyre at mid latitudes. According to the above study, the strength of El Nio's warming was believed to be the main influence in the strength of the monsoon seasons. Though shallow, they are extremely important in determining the world's weather and climates, and in distributing the ocean's heat and nutrients. (D) Peruvian. None of the above/More than one of the above. It is the western boundary current of the subtropical North Pacific gyre. 4. The current is also known as Malvinas Current. The winds blowing from the south move the monsoon to the U.S. Southwest in July. Warm currents are those that flow away from the equator and toward the poles or latitudes on the western side of ocean basins. At the southern limit of the Australian monsoon, the winds turn easterly. Current records for 2016 indicate that total rainfall between June 1 and September 30 is 97.3 percent of the seasonal normal. Revolution of the Earth. The Somali Current is similar to the Gulf Stream in the Atlantic Ocean. looked at another way, its 'memory' - is many times longer than that of the atmosphere, and one of the most interesting questions that can be asked about the ocean circulation is: How is it possible for the ocean to react as fast as it does? A 2004 report was presented by NOAA describing studies on the North American Monsoon System. (C) 1 and 4 Greenhouse gases, such as carbon dioxide, can make warm air hold onto more water only to release it as rain over already soaked areas. Based on temperature, ocean currents are classified as cold currents and warm currents: Cold currents transport cold water from high latitudes to low latitudes, bringing cold water into warm water areas. (D) Indian Ocean has greater variation in salinity, (A) The Indian Ocean The movement of the Indian South Equatorial Current is particularly strong off the Somali coast and southeastern Arabia, where upwelling lowers the surface temperature of the water near shore. Figure 5.12 Surface currents in the northern Indian Ocean, as deduced from ships' drift data. There are two types of tides namely, spring tides and neap tides depending upon the relative positions of the sun, the earth, and the moon.
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