Eustatic and isostatic change by Lisa Steciuk https://padlet.com/list4/v1hh3fxrsq6f8qfh What is the difference between eustatic and isostatic change? How is this linked to global climate change? en-us 2020-05-29 07:24:39 UTC 2026-01-08 05:01:25 UTC hello@padlet.com Ayumi https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922213 eustatic: caused by a change in the volume of the sea or change in the shape of the sea basins --> global effect
isostatic: caused by the vertical movement of the land --> local effect
-increase in temperature leads to the melting of the ice sheets and thus increases sea level]]> 2020-06-01 01:46:38 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922213 Aly https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922218 Isostatic change - the vertical movement of land, downward movement of land causes sea levels to rise. Local sea level change.
Eustatic - caused by a change in sea levels or change in the shape of sea basins. Global sea level change. 

]]> 2020-06-01 01:46:39 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922218 Sam W https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922293 Isostatic: 

  • caused by a change in vertical movement of land 
  • downward -> sea levels rise 
  • uplift -> sea levels fall
  • usually has local effects
  • compression or decompression  

Eustatic:
  • caused by a change in sea levels
  • usually has global effects
  • tectonic movements e.g. seafloor spreading 
  • climate change - melting ice caps 
  • more precipitation to form slow - more glacier store  


]]> 2020-06-01 01:46:44 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922293 tach https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922324 isostatic -->  downward vertical movement of land causing sea levels to rise 
eustatic--> changes in the sea levels and changes in shape of sea basins
 
increase temp because of ice sheets melting --> increases sea levels ]]> 2020-06-01 01:46:46 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922324 Kiki https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922336 Isostatic change
-  caused by the vertical movement of land. 
- It results in the compression of the Earth's crust

Eustatic change:
- caused by a change in the volume of sea level e.g glaciers compressing the land for a long period of time
-  Results in tectonic movements of the earth's crust
- the melting of ice caps can cause climate change as well as precipitation]]> 2020-06-01 01:46:46 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922336 renee rekw21 https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922401 isostatic - 
always has a local effect 
caused by a vertical movement of the world 
- eg: downward movement causes sea levels to rise

eustatic-
always has a global effect 
caused by a change of elevation in the sea or volume of water in the ocean 
- eg: tectonic movement of earths crust 

]]> 2020-06-01 01:46:47 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922401 Chris chch21 https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922506 Eustatic
-Is caused by a volume change in the sea and change of the sea basins
Isostatic
-Caused by a vertical movement of the land

Ice
-Sea levels will rise
-Species will decrease/endangered/extinct
-Northwest passage opened
-Ice melts -> reduces albedo effect --> climate change]]> 2020-06-01 01:46:48 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922506 Katie https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922720 eustatic: caused by a change in the volume of water in the sea or by a change in the shape of ocean basins.

Isostatic: caused by vertical movement of the land ]]> 2020-06-01 01:46:59 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603922720 abhi https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923019 - changes (an increase of decrease) in sea level are called eustatic changes
- isostatic are the changes in the level of land in relation to the sea]]> 2020-06-01 01:47:21 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923019 sam r saro211 https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923130 Eustatic:
are global sea-level changes related either to changes in the volume of glacial ice on land or to changes in the shape of the sea floor caused by plate tectonic processes. 
Isostatic: are local changes caused by subsidence or uplift of the crust related either to changes in the amount of ice on the land, or to growth or erosion of mountains. 


]]> 2020-06-01 01:47:28 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923130 Dev https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923503 Isostatic is more of a local sea level change and Eustatic is a global sea level change.]]> 2020-06-01 01:47:53 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603923503 Dev https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931790 Melting of the sea ice makes it easier for trade to occur for example trade between Russia and Europe can happen a lot faster through the north. 
Melting Ice caps has negligible effects how over ice on land is what has the greater effects and will affect the sea levels
Less is being reflected back into space further increasing global temperatures; less albedo effect - positive feedback loop 
Could have new untapped resources 
Seismic blasting from ships will disrupt ecosystems as well as icebergs melting will cause a loss of habitats to manyu organisms ]]> 2020-06-01 01:57:37 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931790 renee rekw21 https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931849 negative impact of sea level rises 
- loss of economic growth 
- flood risks ( eg drowning of the American Seabord) 
-flood damage 
- creation of inland oceans for example in Australia 

negative impact of melting ice caps 
- industries expanding further North and using seismic blasting
- Loss of habitat, eg for seal species 

Feedback mechanisms: 
There is a less of an albedo effect because as the earth gets warming ice caps melt and this reflects less sunlight into space. ]]> 2020-06-01 01:57:40 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931849 sam r saro211 https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931880 There will overall be negative impacts of melting sea ice. The rising sea levels will displace many people living in coastal areas and cause millions of dollars worth of damage. It will also destroy the natural habitats of many arctic species, causing more extinction. This also presents a positive feedback loop as the melting of ice causes less reflection of light from the sun which promotes the planet to become even warmer and causing the ice to melt at a faster rate. 

In terms of the positives, economically it benefits as it allows increased trade around the world as there are fewer obstructing glaciers. ]]> 2020-06-01 01:57:42 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931880 ayumi https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931940 -loss of marine habitats
-energy and oil companies will use seismic blasting to look for hidden resources which will mentally harm whales
-as the earth becomes warmer, more ice melts which means that less light is reflected and more water is absorbed by the oceans and thus more non-salty water --> disrupt currents]]> 2020-06-01 01:57:46 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931940 abhi https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931969 - overall there will be a negative effect  of ice melting
- animals will lose their habitats
- provide transport links for ships
- good for shipping companies
- marine animals are more likely to go extinct
- possibly finding more oil 
- feedback loops: ice reflects sunlight -> if the world gets get warmer -> more glaciers melt -> less light is reflected (less albedo effect) -> global temperatures increase

]]> 2020-06-01 01:57:49 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931969 aly https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931974 melting of ice in the Arctic:
positives: good for shipping companies, as there will be no more glaciers to block their 'path'. Good for oil companies as there will be more areas to extract oil from. 
negatives: wildlife and ecosystems destroyed. 
- sea levels rise and many major cities will be flooded, so an increased number of displaced people. 
- the currents will change, Europe will be colder, so crops will die. 
Feedback loops:
- ice reflects sunlight, as ti gets warmer, ice melts so reflect less sunlight, gets warmer still and the sea gets fresher. ]]> 2020-06-01 01:57:49 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931974 Kiki https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931980 Positives:
- ships can travel through the Artic without ice intervention
-More resources
Negatives:
- Animals losing habitat e.g seals
- Marine animals being affected by seismic blasting which causes physical damage
- disruption of sea water current which may affect the biodiversity
- Countries and land areas flooded

Positive feedback:
Ice reflects sunlight and so if the world gets warmer --> more ice caps/glaciers melt --> less light is reflected (less albedo effect due to less white surface reflecting back) --> further increase in temperature 

]]> 2020-06-01 01:57:50 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931980 Sam W https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931991
Negatives:
  • marine species e.g. Bowhead whales and Narwhals → extinction 
  • Oil extraction → seismic blasting
  • sea levels rise by 70 m → Bangladesh, US, Northern China at risk 
  • just a few feet of sea-level rise → Tokyo, Jakarta, Mumbai could cause a trillion dollars of costs, people will be displaced 
  • sea currents may change → gulf alteration → Agricultural impacts on Europe 

Positive:
- good for navigation

Feedback loops:

  • Ice reflects sunlight 
  • Ice melt → less sunlight reflection (reduced albedo effect) → warming effect on the Earth 

]]> 2020-06-01 01:57:51 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931991 tach https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931995 Good and bad from melting sea ice:
  • For transport 
  • Habitats are dying 
  • Seismic blasting from industrialisation (new opportunity from new land) —> causes physical trauma and relocation of ecosystem
Explain feedback loops from melting ice:
Sea levels go up and then it drowns out coastal areas which are costly, also reflection/albedo and global warming
 Gulf will shift and then no more crops so relocation to grow new crops 
]]> 2020-06-01 01:57:51 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603931995 Katie https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603932996 - animals lose habitat
- loss of economic growth
sea levels rise putting coastal areas in danger
- to look for resources, energy and oil companies will use seismic blasting -> harm whales
- sea currents may change

positive:
- easier transportation and trade because easier navigation

]]> 2020-06-01 01:59:10 UTC https://padlet.com/list4/v1hh3fxrsq6f8qfh/wish/603932996