False
Download Learnerz IAS app from the Play Store now! Download

$show=search/label/May%202022

 


Marine Coldwaves UPSC NOTE

 

  • The effects of ocean warming are profound 

  • But sometimes changes in the patterns of winds and ocean currents cause sea water to suddenly cool, instead.

  • Surface temperatures can plummet rapidly — by 10ºC or more over a day or two. 

  • When these conditions persist for several days or weeks, the area experiences a “coldwave”, which is the opposite of more familiar marine heatwaves.

  • When a “killer coldwave” manifested along South Africa’s southeast coast in March 2021, it killed hundreds of animals across at least 81 species

  • As per reports, the conditions that can drive these killer cold waves have grown increasingly common over the past four decades

  • Ironically, strengthening winds and currents as a result of climate change can also make these deadly localised coldwaves more likely in places such as the east coasts of South Africa and Australia, potentially putting even highly mobile species such as sharks in harm’s way

  • Certain wind and current conditions can cause the sea surface to cool, rather than warm

  • This happens when winds and currents force coastal waters to move offshore, which are then replaced from below by cold water from the deep ocean. 

  • This process is known as upwelling.

  • In some places, such as California on the US west coast, upwelling happens regularly along hundreds of kilometres of coastline. 

  • But localised upwelling can occur seasonally on a smaller scale, too, often at the edges of bays on the east coasts of continents due to interactions of wind, current and coastline.

  • Research showed an increasing trend in the number of annual upwelling events over the past 40 years. 

  • It also found an increase in the intensity of such upwelling events and the extent to which temperatures dropped 

  • During the extreme upwelling event along the southeast coast of South Africa in March 2021, at least 260 animals from 81 species died. 

  • These included tropical fish, sharks and rays

COMMENTS

Name

Amritsar,1,April 2024,301,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,May 2024,233,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
ltr
item
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Marine Coldwaves UPSC NOTE
Marine Coldwaves UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
https://www.learnerz.in/2024/04/marine-coldwaves-upsc-note.html
https://www.learnerz.in/
https://www.learnerz.in/
https://www.learnerz.in/2024/04/marine-coldwaves-upsc-note.html
true
4761292069385420868
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content