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In the context of physical geography, the term 'thermokarst' is best defined as:
- a)A more or less level land surface produced by erosion over a long period.
- b)A feature resulting from the melting of ground ice in a region underlain by permafrost.
- c)An underground geomorphological feature of Karst topography.
- d)An erosional feature of weathered rocks produces due to temperature differences.
Correct answer is option 'B'. Can you explain this answer?
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In the context of physical geography, the term thermokarst is best def...
- The term "thermokarst" is most commonly associated with permafrost areas. Permafrost refers to the permanently frozen ground found in regions where the temperature remains below freezing for a significant portion of the year, usually in polar and subpolar regions.
- Thermokarst is a geological process specific to permafrost regions, wherein the thawing of frozen ground leads to the collapse of surface features. When permafrost thaws, it can result in the destabilization of the ground, causing the formation of depressions, sinkholes, and uneven terrain. These features are collectively referred to as thermokarst landforms.
- The thawing of permafrost can occur due to various factors, including rising temperatures, changes in precipitation patterns, or human activities such as mining or deforestation. As the permafrost thaws, the ice within the ground melts, leading to the loss of structural support and the collapse of surface materials.
- Thermokarst landscapes are characterized by their irregular topography, with numerous depressions and uneven surfaces. These features can have significant ecological and environmental implications, affecting water drainage patterns, vegetation growth, and wildlife habitat.
Hence option (b) is the correct answer.
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In the context of physical geography, the term thermokarst is best def...
Definition of Thermokarst:
Thermokarst is a term used in physical geography to describe a feature resulting from the melting of ground ice in a region underlain by permafrost. It is a common phenomenon in cold regions like the Arctic and subarctic where permafrost is present.
Explanation:
- When permafrost, which is a layer of soil or rock that remains frozen for at least two consecutive years, thaws due to increased temperatures, the ice within the soil melts. This melting of ice causes the ground surface to collapse and form depressions known as thermokarst features.
- Thermokarst features can take various forms such as pits, sinkholes, or small lakes, depending on the extent of ice melt and the characteristics of the overlying soil or rock.
- The formation of thermokarst features can have significant implications for the landscape, ecosystems, and human activities in the affected areas. It can lead to changes in drainage patterns, vegetation distribution, and wildlife habitats.
- Additionally, the release of trapped greenhouse gases such as methane from thawing permafrost can contribute to climate change, further exacerbating the impacts of thermokarst formation.
Conclusion:
In conclusion, thermokarst is an important concept in physical geography that highlights the complex interactions between ice, permafrost, and the environment. Understanding thermokarst processes is crucial for predicting and mitigating the impacts of climate change in cold regions.
Thermokarst is a term used in physical geography to describe a feature resulting from the melting of ground ice in a region underlain by permafrost. It is a common phenomenon in cold regions like the Arctic and subarctic where permafrost is present.
Explanation:
- When permafrost, which is a layer of soil or rock that remains frozen for at least two consecutive years, thaws due to increased temperatures, the ice within the soil melts. This melting of ice causes the ground surface to collapse and form depressions known as thermokarst features.
- Thermokarst features can take various forms such as pits, sinkholes, or small lakes, depending on the extent of ice melt and the characteristics of the overlying soil or rock.
- The formation of thermokarst features can have significant implications for the landscape, ecosystems, and human activities in the affected areas. It can lead to changes in drainage patterns, vegetation distribution, and wildlife habitats.
- Additionally, the release of trapped greenhouse gases such as methane from thawing permafrost can contribute to climate change, further exacerbating the impacts of thermokarst formation.
Conclusion:
In conclusion, thermokarst is an important concept in physical geography that highlights the complex interactions between ice, permafrost, and the environment. Understanding thermokarst processes is crucial for predicting and mitigating the impacts of climate change in cold regions.
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In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer?
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In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer?.
In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the context of physical geography, the term thermokarst is best defined as:a)A more or less level land surface produced by erosion over a long period.b)A feature resulting from the melting of ground ice in a region underlain by permafrost. c)An underground geomorphological feature of Karst topography.d)An erosional feature of weathered rocks produces due to temperature differences.Correct answer is option 'B'. Can you explain this answer?.
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