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IELTS Free Online Writing Practice - Discuss the impact of climate change on ocean circulation.

IELTS.WORK Free Online Writing Practice # 1711113946

Task 2 Writing Topic: Discuss the impact of climate change on ocean circulation.

Model Answer:

It is a well-known fact that climate change has had significant consequences on various aspects of our environment, including changes in ocean circulation patterns. The aim of this essay is to explore the extent to which climate change has affected ocean circulation and discuss the potential implications of these alterations.

To begin with, one of the most notable impacts of climate change on ocean circulation is the melting of polar ice caps. This process leads to an increase in the volume of freshwater entering the ocean, particularly in areas such as the Arctic and Antarctic regions. Consequently, this freshening of seawater alters the density of water masses, thereby disrupting the natural circulation patterns in the ocean. For example, the formation of a relatively low-density surface layer can create a barrier that prevents the downward mixing of nutrients and other substances necessary for marine ecosystems to thrive.

Additionally, climate change has contributed to a rise in global sea levels due to the expansion of seawater as it warms, as well as the melting of glaciers and ice sheets. This increase in sea level can have profound effects on ocean circulation by altering the balance between the Coriolis effect (the deflection of water caused by Earth's rotation) and the wind-driven circulation. As sea levels rise, the extent to which the Coriolis effect influences ocean currents may be diminished, potentially leading to a disruption in the established circulation patterns.

Moreover, rising temperatures have a direct impact on the thermohaline circulation, also known as the global conveyor belt. The thermohaline circulation is responsible for transporting warm surface water from the equator towards the poles and transporting cold deep water back to the tropics. As global temperatures rise due to climate change, the temperature gradient between the equator and the poles becomes less pronounced. Consequently, this reduction in temperature difference could slow down or even reverse the thermohaline circulation, disrupting the balance of heat distribution across the planet.

Lastly, changes in ocean circulation patterns caused by climate change have significant implications for marine ecosystems. For instance, alterations in the distribution of nutrients can lead to shifts in the locations and abundance of marine life. These changes can, in turn, affect the livelihoods of communities that rely on fishing and other maritime industries.

In conclusion, climate change has had a profound impact on ocean circulation, with consequences for marine ecosystems, global heat distribution, and sea levels. As we continue to experience the effects of climate change, it is crucial to develop strategies to mitigate its impacts and protect our oceans for future generations.

Scoring:

- Task Response: 5 (The candidate has responded fully and accurately to all parts of the task. The response demonstrates a thorough understanding of the question.)
- Coherence and Cohesion: 5 (The essay is very coherent, with a logical progression of ideas. The use of cohesive devices such as pronouns, conjunctions, and restatements is excellent.)
- Lexical Resource: 5 (The vocabulary choice is varied and precise, and the candidate demonstrates a strong command of complex language structures.)
- Grammatical Range and Accuracy: 4.5 (There are only a few or no minor errors in grammar and syntax, but some may affect clarity. There are no major grammatical errors.)
- Presentation of ideas: 5 (The candidate has presented ideas clearly and effectively. The essay is well structured and easy to follow.)

Overall Band Score: 4.7

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