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Glacial ablation is the term for a loss of glacial mass in terms of ic

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Glacial ablation is the term for a loss of glacial mass in terms of ic  [#permalink]

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New post 13 Feb 2019, 03:57
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Glacial ablation is the term for a loss of glacial mass in terms of ice. Ablation rates vary based on a wide number of factors, one of which is submarine melt: ice loss due to contact between the glacier and seawater. While factors such as air temperature, precipitation, and snow accumulation play significant roles, glacial ablation along coastlines tends to proceed at its greatest rate when warm ocean currents come into contact with the base of the glacier and produce a high degree of submarine melt. Warm ocean currents along glacial coastline areas increase in frequency as overall ocean temperatures rise.

Which of the following can be most readily inferred from the information in the passage?

A. Regions with the greatest rate of glacial ablation have the greatest proximity to the strongest warm ocean currents.

B. Very few glaciers in regions without warm ocean currents suffer from high rates of glacial ablation.

C. Glacial ablation due to submarine melt rates was lower on average during periods of lower overall ocean temperatures.

D. Submarine melt rates have become an important factor to glacial ablation only with the onset of global climactic shifts.

E. The lower the overall ocean temperature, the more likely that factors such as snow accumulation are to play a significant role in glacial ablation.

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Re: Glacial ablation is the term for a loss of glacial mass in terms of ic  [#permalink]

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New post 19 Feb 2019, 06:35
Narrowed my choices to A/D:

A. Regions with the greatest rate of glacial ablation have the greatest proximity to the strongest warm ocean currents.

The part in bold refers to the greatest rate of glacial ablation. The distinction here is that this refers to the general rate of glacial ablation. The passage mentions "Ablation rates vary based on a wide number of factors, one of which is submarine melt: ice loss due to contact between the glacier and seawater." So we know from that GA varies based on different factors.

The passage then states "While factors such as air temperature, precipitation, and snow accumulation play significant roles, glacial ablation along coastlines tends to proceed at its greatest rate when warm ocean currents come into contact with the base of the glacier and produce a high degree of submarine melt." The focus then shifts to a specific type of glacial ablation along coast lines. This is the type where GA rates is at it's greatest when warm ocean currents contact glaciers. So we only know the trend for GA rates of glaciers near coasts but not other glaciers. Therefore, this answer choice is too broad.

C. Glacial ablation due to submarine melt rates was lower on average during periods of lower overall ocean temperatures.

I wasn't fully sure in selecting this answer because it took a bit more logic to infer this than I liked. The passage states "glacial ablation along coastlines tends to proceed at its greatest rate when warm ocean currents come into contact with the base of the glacier and produce a high degree of submarine melt." Reading this, you can deduce that warm oceans current is positively correlated with high degrees of submarine melt. Applying the opposite logic to the specified trend, lower temperatures would mean lower submarine melt.

Answer Choice: C
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Re: Glacial ablation is the term for a loss of glacial mass in terms of ic  [#permalink]

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New post 19 Feb 2019, 09:00
Pankaj1Agarwal wrote:



A is talking about region while the argument is about the glacier.




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Re: Glacial ablation is the term for a loss of glacial mass in terms of ic  [#permalink]

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New post 19 Feb 2019, 21:25
SajjadAhmad wrote:
Glacial ablation is the term for a loss of glacial mass in terms of ice. Ablation rates vary based on a wide number of factors, one of which is submarine melt: ice loss due to contact between the glacier and seawater. While factors such as air temperature, precipitation, and snow accumulation play significant roles, glacial ablation along coastlines tends to proceed at its greatest rate when warm ocean currents come into contact with the base of the glacier and produce a high degree of submarine melt. Warm ocean currents along glacial coastline areas increase in frequency as overall ocean temperatures rise.

Which of the following can be most readily inferred from the information in the passage?

A. Regions with the greatest rate of glacial ablation have the greatest proximity to the strongest warm ocean currents.

B. Very few glaciers in regions without warm ocean currents suffer from high rates of glacial ablation.

C. Glacial ablation due to submarine melt rates was lower on average during periods of lower overall ocean temperatures.

D. Submarine melt rates have become an important factor to glacial ablation only with the onset of global climactic shifts.

E. The lower the overall ocean temperature, the more likely that factors such as snow accumulation are to play a significant role in glacial ablation.



Why option E is wrong? I mean both C and E are saying the same thing, it's just in E the additional factor is mentioned which would be the cause for Glacial ablation in absence of submarine melts. Please explain.
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Re: Glacial ablation is the term for a loss of glacial mass in terms of ic  [#permalink]

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New post 01 Jul 2019, 06:06
Ritwick91 wrote:
SajjadAhmad wrote:
Glacial ablation is the term for a loss of glacial mass in terms of ice. Ablation rates vary based on a wide number of factors, one of which is submarine melt: ice loss due to contact between the glacier and seawater. While factors such as air temperature, precipitation, and snow accumulation play significant roles, glacial ablation along coastlines tends to proceed at its greatest rate when warm ocean currents come into contact with the base of the glacier and produce a high degree of submarine melt. Warm ocean currents along glacial coastline areas increase in frequency as overall ocean temperatures rise.

Which of the following can be most readily inferred from the information in the passage?

A. Regions with the greatest rate of glacial ablation have the greatest proximity to the strongest warm ocean currents.

B. Very few glaciers in regions without warm ocean currents suffer from high rates of glacial ablation.

C. Glacial ablation due to submarine melt rates was lower on average during periods of lower overall ocean temperatures.

D. Submarine melt rates have become an important factor to glacial ablation only with the onset of global climactic shifts.

E. The lower the overall ocean temperature, the more likely that factors such as snow accumulation are to play a significant role in glacial ablation.



Why option E is wrong? I mean both C and E are saying the same thing, it's just in E the additional factor is mentioned which would be the cause for Glacial ablation in absence of submarine melts. Please explain.



the factors that play the most significant roles in case of lower ocean temperature is not discussed in the paragraph...........
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Re: Glacial ablation is the term for a loss of glacial mass in terms of ic   [#permalink] 01 Jul 2019, 06:06
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