Home/upsc: climatology
- Recent Questions
- Most Answered
- Answers
- No Answers
- Most Visited
- Most Voted
- Random
- Bump Question
- New Questions
- Sticky Questions
- Polls
- Followed Questions
- Favorite Questions
- Recent Questions With Time
- Most Answered With Time
- Answers With Time
- No Answers With Time
- Most Visited With Time
- Most Voted With Time
- Random With Time
- Bump Question With Time
- New Questions With Time
- Sticky Questions With Time
- Polls With Time
- Followed Questions With Time
- Favorite Questions With Time
What is the phenomenon of ‘cloudbursts’? Explain. (Answer in 150 words) [UPSC 2024]
Model Answer Introduction A cloudburst is an extreme weather event characterized by sudden and intense rainfall over a localized area, often occurring within a short time frame, typically less than an hour. This phenomenon can lead to flash floods, causing significant destruction, particularly in moRead more
Model Answer
Introduction
A cloudburst is an extreme weather event characterized by sudden and intense rainfall over a localized area, often occurring within a short time frame, typically less than an hour. This phenomenon can lead to flash floods, causing significant destruction, particularly in mountainous regions. For instance, a devastating cloudburst in Uttarakhand, India, in 2013 triggered severe floods and landslides, highlighting the destructive potential of such events.
Phenomenon of Cloudburst
Characteristics of Cloudbursts
Conclusion
As climate patterns shift, the frequency and intensity of cloudbursts are expected to rise, especially in vulnerable areas. Enhanced weather forecasting and disaster preparedness will be crucial in mitigating their impacts and helping communities adapt to these unpredictable events.
See less4. In what ways does the cryosphere influence the carbon cycle and impact atmospheric carbon dioxide levels? (200 words)
Model Answer Introduction The cryosphere, consisting of Earth's frozen components like glaciers, ice caps, and permafrost, plays a crucial role in the carbon cycle, which regulates the movement of carbon through the atmosphere, oceans, land, and living organisms. This interaction between the cryosphRead more
Model Answer
Introduction
The cryosphere, consisting of Earth’s frozen components like glaciers, ice caps, and permafrost, plays a crucial role in the carbon cycle, which regulates the movement of carbon through the atmosphere, oceans, land, and living organisms. This interaction between the cryosphere and the carbon cycle influences atmospheric carbon dioxide (CO2) levels, affecting climate dynamics and global temperatures.
Cryosphere Interactions with the Carbon Cycle
Carbon Storage: The cryosphere serves as a significant carbon sink, particularly through permafrost and glaciers. Permafrost, which consists of frozen soil containing partially decomposed organic matter, stores vast amounts of carbon. This carbon can remain trapped for thousands of years, preventing it from entering the atmosphere as CO2.
Albedo Effect: Snow and ice have a high albedo, meaning they reflect much of the sun’s energy back into space. This reduces the amount of solar radiation absorbed by the Earth’s surface, helping to keep temperatures stable. As the cryosphere shrinks, darker surfaces like open water or bare land are exposed, absorbing more solar energy and exacerbating warming, a process known as the albedo feedback.
Ocean Circulation and Carbon Uptake: Melting glaciers and ice sheets introduce fresh water into the ocean, which affects ocean circulation patterns. This freshening of seawater influences the ocean’s ability to absorb CO2 and impacts the biological pump, the process by which carbon is transferred to deeper ocean layers by marine organisms.
Effects on Atmospheric CO2 Concentrations
Feedback Mechanisms: Changes in the cryosphere can trigger feedback loops that amplify climate change. For instance, as permafrost thaws due to rising temperatures, stored carbon is released as CO2 or methane (CH4) into the atmosphere, contributing further to global warming.
Permafrost Thawing: The thawing of permafrost is a major concern, as it releases large quantities of CO2 and methane, gases that have been trapped in frozen soil for millennia. This release could accelerate climate change, particularly as methane is a much more potent greenhouse gas than CO2.
Conclusion
The cryosphere influences the carbon cycle by acting as both a carbon sink and a potential source. As it melts and thaws, it has significant implications for atmospheric CO2 levels, driving positive feedback loops that amplify climate change. Understanding these interactions is crucial for predicting future climate dynamics and managing the global carbon cycle.
See lessDiscuss how global atmospheric circulation functions as a conveyor belt, influencing the world's weather patterns. (200 words)
That is where the trick goes: "Global atmospheric circulation" is a like a complex yet simple mechanism that manages the mundane of the worlds greenhouse weather Like a conveyor belt, it distributes heat, moisture and momentum across the surface of the Earth and munches out the heat and moisture-pacRead more
That is where the trick goes: “Global atmospheric circulation” is a like a complex yet simple mechanism that manages the mundane of the worlds greenhouse weather Like a conveyor belt, it distributes heat, moisture and momentum across the surface of the Earth and munches out the heat and moisture-packed regions counterbalances those that are lacking. It is this dynamic process, which contributes to day-to-day weather but also plays a key role in regulating long-term climate patterns, that makes the Earth an extraordinarily complex environmental system.
The Fundamentals of Atmospheric Circulation
The uneven distribution of solar radiation across the Earth’s surface is the principle behind global atmospheric circulation. (LI) The tropics are warmer (because they get more direct sunlight), and the poles are cooler (because they get less direct sunlight). This temperature gradient results in the movement of air, giving rise to the dominant circulation cells — the Hadley Cell, the Ferrel Cell, and the Polar Cell.
Hadley Cell: The Hadley cell is globally located in the tropics (approximately between 30° N and 30° S latitude). Near the equator, the warm air rises, creating a low-pressure region called the Intertropical Convergence Zone (ITCZ). As this warm, moist air rises, it cools and loses moisture, causing precipitation. The air then flows toward the poles at higher altitudes and sinks in the subtropics, creating areas of high pressure that typically produce dry, arid environments, like deserts.
Ferrel Cell: The Ferrel Cell is a secondary circulation cell between 30° and 60° latitude in both hemispheres. Air that sinks at 30° latitude flows toward the equator at the surface, and air that rises at 60° latitude flows toward the pole. However, this cell is more indirect and is largely affected from both polar and Hadley cells in addition to the rotation of the Earth. This mid-latitude circulation is known as the Ferrel Cell and helps in regulating the cold and warm temperatures and moisture distribution in mid-latitude areas.
Polar Cell: this cell functions in the polar regions, approximately between 60° and 90°. The poles create regions of high pressure as cold, dense air sinks. This air is then displaced equatorward at the surface, where it converges with poleward-moving air from the Ferrel Cell at 60° latitude. The polar front is the boundary between the cold polar air and the warmer air to the south, and it is an important boundary for mid-latitude weather systems.
The Role of the Jet Streams
Jet streams are belts of fast-moving air about 10-15 kilometers above the ground. Their formation and direction are greatly affected by the temperature difference between the equator and the poles, and they largely dictate the motion of climate systems. Each hemisphere has its main two jet streams — the polar jet stream and the subtropical jet stream.
Polar Jet Stream: Near the polar front, this jet stream is strongest in winter when the temperature gradient between pole and mid-latitude is greatest. It steers the movement of storm systems and can lead to rapid shifts in weather.
Hadley Cell — as mentioned, the upper portion of this cell / both of the jet streams is significantly driven by this generally 30° of latitude circulation. It is typically not as strong as the polar jet stream and is involved in the development and steering of tropical storms and hurricanes.
The Impact of Ocean Currents
Oceans are also critical to the workings of atmospheric circulation. Ocean currents move heat from tropics to poles, which can either amplify or temper atmospherically induced fire. The Gulf Stream in the Atlantic Ocean is one such current that carries warm water from the tropics back to the North Atlantic, affecting the overall climate of Western Europe and causing it to be warmer than it otherwise would have been.
Seasonal Variations
Global atmospheric circulation patterns are also not constant; they shift throughout the year with changes in the Earth’s orbital position relative to the sun. In summer, the ITCZ moves north in the Northern Hemisphere and south in the Southern Hemisphere, changing the precipitation regime. This change is especially marked in monsoon regions, where the seasonal cycle of the ITCZ can result in torrential rainfall in summer, and desiccation in winter.
It is about Climate Change and Atmospheric Circulation
Climate change is changing the Earth’s atmospheric circulation patterns. Global warming — but particularly polar amplification — is reducing the equator-pole temperature gradient. This can contribute to a weaker polar jet stream, which can cause weather systems to meander more and move more slowly. These changes can lead to persistent weather patterns, such as droughts or torrential rainstorms, and can impact the intensity of extreme weather events.
Conclusion
There is a global atmospheric circulation that is similar to a conveyor belt, transporting heat and moisture around our planet, and shaping weather and climate. Which is to say: the main circulation cells—Hadley, Ferrel and Polar—plus jet streams, plus ocean currents, all combine to produce the sort of weather we have. For meteorologists and climate scientists the patterns of these irregularities is essential in predicting weather events and determining the long-term effects of climate change. Understanding the dynamics and impacts of atmospheric circulation will thus be critical to navigate the changing landscape of Earth and its climate into the future.
See lessDiscuss the causes and consequences of the rising frequency of heatwaves globally. Propose strategies for adaptation and mitigation. (200 words)
What Causes a Slum to Evolve. The Silenced Epidemic Due to fast urbanization in developing nations, slum population and density have increased sharply. Globally south cities have informal cities that lack formal housing, public health, basic necessities and food security. Main Drivers Contributing tRead more
What Causes a Slum to Evolve. The Silenced Epidemic
Due to fast urbanization in developing nations, slum population and density have increased sharply. Globally south cities have informal cities that lack formal housing, public health, basic necessities and food security.
Main Drivers Contributing to Slum Development
Rural-to-urban Migration: The factor that primarily drives the growth of slums is rural-urban migration. Urban Migration: Individuals move from rural to urban areas in pursuit of improved job prospects, better education, and access to healthcare. Nonetheless, the urban infrastructure tends to lag behind the arrival of newcomers, resulting in informal settlements (informal settlement). These migrants, unable to financially sustain formal housing, find themselves in areas that are cheaper but not necessarily livable.
Slum Expansion Economic Disparities and Poverty: One of the primary reasons for the expansion of slums is economic disparity and poverty. Urban poor are mostly slum dwellers and urban poverty tends to more acute than rural poverty. Due to high levels of unemployment, underemployment, and low wages in cities, individuals and families struggle to find decent housing. People peddle spices freshly grated on the pavement, trying to make a living in urban areas where the expense of daily life, occupations, and transportation eats up the bulk of their income, along with housing.
Housing Shortages and Land Inequality: Many developing cities struggle to alleviate significant housing shortages, compounding the issue of slums. There is a housing shortage, and many people cannot afford formal housing. Land Inequality with a few elites own the land most of the land around the world, arise the number of affordable housing issues. This means that informal settlements also become the only available choice for many.
Government Policies and Urban Planning: Insufficient government policies and urban planning also leads to the expansion of slums. Many cities do not have a robust urban growth management plan, and there is often a gap between the plan and action. Poor enforcement of building codes and regulation enables the spread of informal settlements. Additionally, the little political will to cater for the needs of the urban poor often translates into neglect and underinvestment in slum areas.
Environmental and Political Instability : Environmental factors such as natural disasters, climate change, dislocate populations and push them into urban slums. This may also induce migration to urban areas, seeking refuge from violence, conflict and political instability as well as ruralized violence. In addition to raising the number of slum dwellers, these factors also diversify the pressure on slum dwellers and the instability of slums.
Geographic Impacts
Urban sprawl Growth of slums is also one of the reasons of urban sprawl, which means unplanned and uncontrolled expansion of cities. This leads to the depletion of natural resources, as urban sprawl invades plant life, crops, and other significant environmental zones. Not only do environmental degradation of cities worsen with urban sprawl, but providing access to basic services and infrastructure for all citizens in the new areas becomes a challenge.
Spatial Segregation: Slums tend to settle in the most marginalized and least desired parts of cities — floodplains, steep hills, industrial areas. This residential separation could mean a ghettoization of poverty and social ills in these spaces. In many cases, slums are located on the outskirts of a city, with little access to public transport, schools, and hospitals, leaving inhabitants stuck in a cycle of poverty and deprivation.
Environmental Hazard: The slum itself is an informal settlement, which inherently causes environmental hazard. Slum: An area which is considered an illegal habitation with no proper sanitation and waste disposal. Lack of access to clean water and sanitation creates conditions for the spread of diseases. In addition, the establishment of slums on marginal land can lead to an increased likelihood of natural disasters such as floods and landslides, which disproportionately impact the urban poor.
Economic Impacts
The informal economy is often present, with many residents relying on informal work for their livelihoods. But this informal sector is usually underregulated and susceptible to economic shocks. Residents that search for formal employment are limited by a lack of formal opportunities and few social protection mechanisms that put residents in a cycle of poverty and economic insecurity.
Underinvestment in infrastructure Infrastructure investment: is it a realist option in slum? Not only does access to basic services — like electricity, water and sanitation — exist in slum areas, but it puts a limit on economic productivity and ultimately the quality of life. Lack of these services can, hence, dissuade investment and development in slum areas.
Economic Productivity And Growth: Slums have significant economic implications, both positive and negative. On the positive side, the informal economy in slums can drive urban economic productivity as a whole. Conversely, poverty and inequality can inhibit growth and development. Physical infrastructures, such as schools and roads, have been eroded and torn down, making slums a waste of public treasury as governing bodies fail to administer basic human rights.
Social Impacts
Health and Safety Residents: Slums are health and safety compromised. The spread of diseases is facilitated by overcrowded living conditions, poor sanitation, and inadequate access to clean water. Crime and violence — which undermine community cohesion and social stability — are also more prevalent in slums.
Social Exclusion: Stigma Residents of slums often experience social exclusion and stigma. Indeed, informal workers are often excluded from the formal economy and society, which may result in an experience of alienation and limited social mobility. This marginalization is compounded by the minuscule to no political representation on their part that makes it all the more difficult for them to make their voices heard and needs advocated.
Education and Skills Development: The learning and skills likely to gain from in slums are challenging and will expedite the circle of insufficiencies. Kids in slums are less prone to attend or stay in school, which can reduce their later opportunities for upward economic and social mobility. Limited educational opportunities lead to social unrest and crime as well.
Conclusion
The rapid expansion of slums in developing cities is a complex, multifaceted issue fuelled by rural-to-urban migration, economic inequality, a shortfall in housing supply, poor policies instituted by government, environmental and political instability. Slums have geographic, economic, and social impacts that not only affect the residents of poor settlements but also the larger urban environment. The solution to the challenges posed by slums involves integrated intervention in terms of better urban planning, more investment in infrastructure, and social and economic empowerment policies. Without a united effort, there is little hope of breaking the vicious cycle of poverty and disparity, let alone improving conditions in the slums.
See lessWhere are the permafrost regions located around the world, and how has the thawing of permafrost become a major threat to the global climate and ecosystem? (200 words)
Model Answer Permafrost refers to ground that remains frozen at or below 32°F (0°C) for at least two consecutive years. These regions are primarily found in colder climates, and the main areas include: Arctic Region: The majority of permafrost is found here, covering large parts of Siberia, Alaska,Read more
Model Answer
Permafrost refers to ground that remains frozen at or below 32°F (0°C) for at least two consecutive years. These regions are primarily found in colder climates, and the main areas include:
Impact of Thawing Permafrost on Global Climate and Ecosystems
Thawing permafrost has emerged as a significant threat due to several reasons:
Thawing permafrost poses a critical challenge to the global climate and ecosystems, requiring urgent global attention to mitigate its effects.
See lessWhat are jet streams, and how do they influence global weather and climate patterns? (200 words)
Model Answer Jet streams are narrow bands of powerful winds located in the upper atmosphere, generally at altitudes of around 30,000 feet (9,100 meters) in the mid to upper troposphere. They form at the boundary where warm and cold air masses meet, creating areas of significant temperature contrast.Read more
Model Answer
Jet streams are narrow bands of powerful winds located in the upper atmosphere, generally at altitudes of around 30,000 feet (9,100 meters) in the mid to upper troposphere. They form at the boundary where warm and cold air masses meet, creating areas of significant temperature contrast.
Types of Jet Streams
Impact of Jet Streams on Weather and Climate
Impact on India’s Climate
In the context of climate change, understanding the behavior of jet streams is vital to mitigate adverse effects on ecosystems and human populations.
See lessWhat are the key characteristics of the climate and vegetation in the equatorial region, and how do these factors influence the development of countries within this area? (200 words)
Model Answer The equatorial region, spanning 0° to 10° latitude, includes areas such as the Amazon lowlands, the Congo Basin, and parts of Southeast Asia. The climate in this region has the following key features: High Temperature: Temperatures range from 25°C to 27°C year-round with minimal variatiRead more
Model Answer
The equatorial region, spanning 0° to 10° latitude, includes areas such as the Amazon lowlands, the Congo Basin, and parts of Southeast Asia. The climate in this region has the following key features:
Vegetation Characteristics
The vegetation of the equatorial region is dominated by tropical rainforests, which thrive due to the ideal climate:
Impact on Development
In summary, while the equatorial region’s climate and vegetation are rich in biodiversity, they also present challenges for agriculture and economic activities, such as logging and health management. However, the region’s resources, like tropical hardwoods and cash crops, contribute significantly to global markets.
See lessWhat is weathering? Discuss the different types of weathering processes. (200 words)
Model Answer Weathering Weathering is the process through which rocks break down into smaller fragments due to mechanical disintegration and chemical decomposition. This process is driven by weather and climate elements and plays a crucial role in soil formation, landform creation, and the concentraRead more
Model Answer
Weathering
Weathering is the process through which rocks break down into smaller fragments due to mechanical disintegration and chemical decomposition. This process is driven by weather and climate elements and plays a crucial role in soil formation, landform creation, and the concentration of valuable ores like iron, copper, and manganese.
Types of Weathering Processes
Chemical Weathering
Physical Weathering
Biological Weathering
These processes often interact, with one type dominating based on local environmental conditions.
See lessWhat is the heat budget of the Earth? Discuss the factors that influence the distribution of temperature across the Earth's surface. (200 words)
Model Answer Heat Budget of the Earth The heat budget of the Earth refers to the balance between the amount of solar energy the Earth receives and the amount it radiates back into space. This balance is crucial for maintaining the Earth's average temperature. Of the 100 units of solar radiation receRead more
Model Answer
Heat Budget of the Earth
The heat budget of the Earth refers to the balance between the amount of solar energy the Earth receives and the amount it radiates back into space. This balance is crucial for maintaining the Earth’s average temperature. Of the 100 units of solar radiation received from the Sun, 35 units are reflected back into space by Earth’s albedo, and the remaining 65 units are absorbed—14 units by the atmosphere and 51 units by the Earth’s surface. The Earth then radiates 51 units of energy back into space in the form of terrestrial radiation. Of this, 17 units are directly radiated into space, while the remaining 34 units are absorbed by the atmosphere and later radiated back into space. This cycle ensures that the incoming and outgoing radiation balance at 65 units, maintaining a stable temperature.
Factors Influencing Temperature Distribution
Conclusion
Understanding the heat budget is essential in grasping Earth’s climate system, although human-induced changes, like global warming, threaten to disrupt this balance.
See lessWhat are the conditions required for precipitation to occur? Discuss its different types. (200 words)
Model Answer Conditions Required for Precipitation Precipitation occurs when atmospheric water vapor condenses and falls to the Earth's surface due to gravity. The necessary conditions for precipitation to form include: Sufficient Evaporation: Water vapor must be present in the atmosphere, which usuRead more
Model Answer
Conditions Required for Precipitation
Precipitation occurs when atmospheric water vapor condenses and falls to the Earth’s surface due to gravity. The necessary conditions for precipitation to form include:
Types of Precipitation
Types of Precipitation by Mechanism