final ESS
Understanding Climate
Definitions
Climate refers to long-term atmospheric conditions and averages in a specific area, unlike daily fluctuations known as weather.
Climate Change encompasses both natural variations and human-induced alterations.
Causes and Mitigation
Key inquiries include the underlying causes of climate change and strategies to adapt to or mitigate its impacts on environments and society.
Local and international organizations are actively working on mitigation tactics to combat global warming effects.
Current Climate Change Dynamics
CO2 Increase
Atmospheric carbon dioxide levels have surged from approximately 300 ppm to about 400 ppm in the last century, indicating a ~33% increase.
The average global temperature has escalated by approximately 1°C, raising questions about the implications of this change.
Understanding Rate of Change
While climate fluctuations are regular, the present rate of change is unprecedented, heightening concerns about predictability and impact.
Public Perception and Skepticism
Reasons for Climate Change Skepticism
A significant portion of the American population does not believe the Earth is warming, citing various reasons such as:
Lack of noticeable change in local weather conditions.
Belief in conflicting scientific evidence.
Alternative explanations or reliance on personal experiences.
Religious beliefs attributing control over climate to divine powers.
Modern Indicators of Climate Change
Carbon Isotope Analysis
The abundance of carbon isotopes shows disproportionate levels of 12C compared to 13C, suggestive of increased fossil fuel emissions.
Models that account for both natural and anthropogenic (human-caused) factors align more closely with observed climatic values compared to those considering only natural factors.
Key Climate Change Indicators
Critical factors to observe for understanding global warming include:
Air temperature changes
Ocean temperatures
Sea level rise
Melt rates of polar ice sheets and glaciers
Changes within the biosphere
Global Implications of Climate Change
Regional Variations
Future climate impacts, such as temperature and precipitation changes, will vary regionally, with polar areas experiencing the severest warming.
A global average increase of 2% in precipitation has been recorded over the past century.
Extreme Weather Events
The frequency of extreme weather occurrences, including droughts and hurricanes, has doubled in the U.S. since 1970, highlighting a troubling trend as average global temperatures rise.
According to the IPCC, this shift leads to larger extremes, particularly noted on land, and is magnified in the Northern Hemisphere, especially the Arctic.
Impacts of Rising Global Temperatures
Environmental Consequences
Rising global temperatures result in significant climatic changes, including:
Increased frequency of crop failures and forest fires.
Severe drought conditions and intense rainfall leading to large flooding.
A heightened number of intense hurricanes.
Impact on Glaciers
Glaciers, essential water sources for over 2 billion individuals, are rapidly diminishing, exemplified by comparisons of Shepard Glacier in Glacier National Park from 1913 to 2005.
Mitigation Strategies
Global Cooperation
The Intergovernmental Panel on Climate Change (IPCC) consists of 195 members and is pivotal in researching and assessing climate change.
Foundational agreements like the Kyoto Protocol aimed to reduce greenhouse gas emissions, while recent agreements like COP21 Paris Agreement established targets for limiting temperature rise to 2°C above pre-industrial levels.
Approaches to Climate Change
Adaptation and Mitigation
Adaptation strategies include adjusting and preparing for inevitable climate impacts to reduce vulnerabilities.
Mitigation involves proactive measures to reduce greenhouse gas emissions to minimize climate change impacts.
Emerging Geoengineering Techniques
New methods such as geoengineering aim at large-scale manipulation of the Earth’s climate as a response strategy.
Sustainable Practices
Carbon neutrality can be approached through cap and trade systems, allowing the buying and selling of permits to pollute, promoting overall emissions reductions.
Other innovative methods involve carbon capture, stratospheric aerosol injection, and ocean fertilization.
Final Reflections
The ongoing climate transition will manifest significantly over centuries, highlighting the urgent need for long-term strategies and decisions today to secure a sustainable future.
Understanding Climate
What is Climate?
Definition of climate within the context of atmospheric conditions.
Causes and Impacts
Inquiry into the causes of climate change and its varying environmental and societal impacts.
Mitigation Strategies
Exploration of local and international initiatives aimed at combating global warming.
Weather vs. Climate
Weather: Refers to the atmospheric conditions in a specific area over short durations (hours or days).
Examples: Overcast and cold at 42°F with a 25% chance of rain; Sunny and hot at 102°F with no expected rain.
Climate: The long-term pattern of weather observed over a minimum of 30 years.
Examples of different climates: Polar, Tropical.
Earth’s Energy Balance
Discussion on how energy enters the Earth (solar radiation) and exits as thermal radiation, influencing climate.
Greenhouse Gases
Incoming solar energy is of short wavelength.
Energy radiates back into space as longer wavelength thermal radiation.
Greenhouse gases absorb infrared radiation, leading to an increase in their temperature.
Elevated greenhouse gas temperatures contribute to warming of the Earth's atmosphere.
Key greenhouse gases:
Water vapor
Carbon dioxide
Methane
Nitrogen oxides
Chlorofluorocarbons
Note correlation between temperature and concentrations of greenhouse gases.
Climate Proxies
Paleoclimatology: The scientific study of past climates before instrumental records were established.
Climate Imprints: Proxies that reveal historical climate data, usually through geological records.
Examples of proxies include:
Tree Rings
Sediment Cores
Ice Cores
Coral Reefs
Stable Isotopes
Pollen
Past Climate Changes Through Time
Significant climate events based on geological time scales:
750-580 million years ago (mya): Snowball Earth phenomenon.
250 mya: Notable warming event coinciding with the Permian Extinction.
250-65 mya: Mesozoic Era, characterized by temperatures approximately 9°C warmer than today.
1 mya: Marked the onset of extensive ice ages, with temperatures about 9°C cooler than now.
Acknowledgment that even slight temperature fluctuations can have substantial climatic impacts.
Influences on Climate
Factors affecting climate include:
Movement of continental plates
Volcanism
Milankovitch Cycles: Natural climatic changes attributed to variations in Earth's orbit and axial tilt.
12 Green Buildings
WHAT IS A GREEN BUILDING?
Key Characteristics of Green Buildings:
Energy efficiency
Water efficiency
Use of nontoxic and often local materials
Environmentally responsible practices
Promotes occupant health
Classified as a high-performance building.
HISTORY OF GREEN BUILDING
Green Building Traditions:Although the concept of green buildings may seem modern, classic passive solar strategies have existed for centuries. For example, the Mesa Verde cliff dwellings in Colorado, constructed between 600-1300 CE, effectively utilized thermal mass to maintain comfortable temperatures:
Thermal Mass: Helps in temperature regulation by staying cool in summer and emitting heat during winter.
Sun Orientation: Buildings should ideally have a south-facing orientation to maximize natural light exposure, allowing for adequate lighting in the fall and winter and shading in the summer months via overhangs.
SUNLIGHT ANGLE & HEAT MANAGEMENT
Importance of Sunlight Angle:The angle of sunlight changes throughout the year, making it essential to orient windows and roof overhangs to optimize solar gain and shading. Understanding this concept is crucial for designing buildings that are efficient year-round.
BASICS OF HEATING & COOLING
Role of Sunlight and Air Motion:
The sun provides natural heating, while thermal mass materials absorb and store heat energy.
Air movement, influenced by the sun's path, is crucial for cooling, necessitating design considerations to provide shade in warmer months and sun access in winter.
Thermal mass regulates temperature by absorbing heat during the day and releasing it at night, impacting the overall comfort of the building.
PASSIVE COOLING TECHNIQUES
The strategies include:
Single-side Ventilation: Opening one window for short periods to create a draft.
Stack Ventilation: Utilizing the principle that warm air rises to create a natural flow.
Cross Ventilation: Facilitating air movement from areas of higher pressure to lower pressure, enhancing the cooling effect.
NATURAL SYSTEMS FOR COOLING
Termite Mound Example:The Eastgate Center in Zimbabwe illustrates a natural cooling technique inspired by termite mounds, showcasing how architecture can adapt to local climate conditions for enhanced efficiency.
HEAT PUMP SYSTEMS
Heat Pumps Defined:
A heat pump functions similarly to a refrigerator, utilizing a reversing valve for energy-efficient heating and cooling.
Ground-source heat pumps employ buried tubes that maintain stable underground temperatures year-round, making them effective in various climates.
BIOPHILIC DESIGN
This practice emphasizes the connection between people and nature in built environments, underscoring the importance of integrating natural elements for promoting well-being and productivity within communities.
CLIMATE RESPONSIVE BUILDINGS
These structures reflect their geographical and cultural context, where the design and materials signify the local environment. Examples include buildings in Zion National Park, Utah, and in Timbuktu, Mali, which showcase regional architectural styles influenced by their surroundings.
DAYLIGHTING TECHNIQUES
Natural Light Use:Leveraging natural light reduces reliance on artificial lighting.
Sidelighting: Ensures full illumination within 15 feet of a window.
Toplighting: Involves utilizing clerestories for light from above, suitable for varied floor plans.
Light Shelves: These devices reflect light deeper into the room while providing shading.
BUILDING ENVELOPE CONCEPT
The building envelope acts as the outer skin comprising walls, windows, roof, and foundation, affecting energy efficiency.
R-value: Measures insulation efficiency; higher R-values indicate better insulation.
U-value: Evaluates how well windows conduct heat. Higher U-values represent poorer insulating properties.
ECOFRIENDLY CITY APPROACH
Green Roofs:A green roof consists of multiple layers, including waterproofing, a growing medium, and plants, leading to various environmental benefits, such as improved stormwater management and energy efficiency. Green Walls:Living walls or vertical gardens utilize plants on walls, creating aesthetics while positively impacting air quality.
BIRD FRIENDLY DESIGN
This approach addresses the dangers that birds face from buildings, highlighting measures such as using glass that is less reflective or appears less invisible to them, mitigating collisions.
MODULE 3 CHAPTER 10 ESS 002 8457 8313 GREEN CITIES
MOST & LEAST LIVEABLE CITIES 2021
Least Liveable Cities
Damascus, Syria
Lagos, Nigeria
Port Moresby, Papua New Guinea
Dhaka, Bangladesh
Algiers, Algeria
Tripoli, Libya
Karachi, Pakistan
Harare, Zimbabwe
Douala, Cameroon
Caracas, Venezuela
Most Liveable Cities
Auckland, New Zealand
Osaka, Japan
Adelaide, Australia
Wellington, New Zealand
Tokyo, Japan
Perth, Australia
Zurich, Switzerland
Geneva, Switzerland
Melbourne, Australia
Brisbane, Australia
Factors Considered
The assessment of liveability in cities considers a variety of factors such as:
Living standards: Measure of comfort, wealth, and lifestyle in the city.
Crime rates: The level of crime influences safety and wellbeing of residents.
Transport infrastructure: Quality and accessibility of transportation options.
Access to education and healthcare: Availability and quality of services important for community wellbeing.
Political and economic stability: Influences the overall environment for residents, affecting their quality of life.
URBAN SPRAWL
Modern Urban Settlement Pattern
Characteristics of modern urban sprawl include:
Low-density land use: Spread out development which can lead to higher costs for infrastructure and services.
Single-use zones: Areas designated for a specific purpose only, such as residential, commercial, or industrial, leading to longer travel distances.
Automobile dependency: Residents rely heavily on cars for transportation, contributing to traffic congestion and pollution.
Negative Impacts of Sprawl
Consumes land: Leads to the loss of agricultural and natural areas.
Increases greenhouse gas emissions: More vehicles on the road lead to higher emissions, exacerbating climate change.
Contributes to pollution: Air and water pollution from increased vehicle use and industrial development.
Promotes obesity: Reduced physical activity due to car reliance and lack of walkable pathways.
Creates social inequity: Disparities arise as lower-income populations may be pushed to less desirable locations.
URBANIZATION
Urban Heat Island Effect
The Urban Heat Island (UHI) effect is a phenomenon whereby urban areas experience increased temperatures due to:
Increased temperature from buildings, roads, and vehicles: Concrete and asphalt absorb and retain heat more than natural landscapes.
Reduction of vegetation: Less green space means less natural cooling effect, leading to hotter urban environments compared to their rural counterparts.
LAND USE PLANNING TOOLS FOR PROTECTING FARMLAND
Development Strategies
Urban growth boundary: Limits the area in which urban development can occur, protecting surrounding farmland.
Clustered or conservation development: Encourages development in compact clusters, preserving open spaces around them.
Comparison of Brownfield vs. Greenfield Development
Brownfields:
Definition: Abandoned or contaminated properties often in need of remediation.
Advantages: Can improve urban environments, drive economic revitalization, and foster community engagement.
Challenges: Redevelopment can be complex and costly due to contamination clean-up processes.
Greenfields:
Definition: Clean, undeveloped land typically located outside urban centers.
Advantages: Offer great potential for new development without contamination issues, allowing for innovative design.
Challenges: Development often leads to urban sprawl and may require extensive infrastructure investment.
Pros and Cons
Brownfield Pros: Reduces urban sprawl, can offer design flexibility, and might come with potential financial incentives for developers.
Brownfield Cons: Complicated remediation processes, longer timelines for development.
Greenfield Pros: Clean development environment opportunities and room for significant expansion.
Greenfield Cons: Typically further away from city centers leading to potential transportation issues; may necessitate new infrastructure creation.
LAND USE PLANNING: GENTRIFICATION
Vulnerable Populations
Individuals at greatest risk of displacement during urban redevelopment include:
Renters: Often lack rights and protections as properties are renovated or redeveloped.
Low-income households: May not be able to afford increased rents prompted by gentrification.
People of color: Historical patterns of discrimination can exacerbate challenges they face in maintaining their homes.
GREEN INFRASTRUCTURE
Conversion of Gray to Green Infrastructure
The transition from traditional gray infrastructure (concrete roads, storm drains) to green infrastructure (parks, green roofs) is crucial as it:
Improves air quality, reduces stormwater runoff, and enhances urban biodiversity.
Plays a vital role in creating healthier urban environments that benefit all residents.
BUILDING A DURABLE COMMUNITY FOR CITIES
Key Components
Walkable streets: Encouraging foot traffic can increase community interaction.
Common public spaces: Areas designed for gatherings foster community cohesion and cultural exchange.
Areas for social interaction: Designing spaces that promote social engagement can reduce isolation and foster trust among citizens.
URBAN PLANNING
Walkable Neighborhoods
Characteristics of effective walkable neighborhoods include:
Optimal Size and Accessibility: Neighborhoods should be compact enough for residents to reach amenities by foot.
Interconnected street networks: Promote ease of movement and foster community interaction.
Considerations for an Aging Population: Ensure accessibility features to cater to the needs of older residents.
Transit-Oriented Development (TOD)
Purpose: To establish comfortable, convenient living environments emphasizing public transport, reducing reliance on cars and the associated environmental impacts.
Mixed-Use Development
This approach combines residential, commercial, and recreational spaces to:
Prevent urban sprawl
Foster vibrant community interaction and increase accessibility to amenities.
CITIES AND CLIMATE CHANGE
Importance of Planning
Effective climate action plans must include:
Mitigation strategies: Reducing emissions to combat climate change.
Adaptation strategies: Preparing and evolving infrastructure to accommodate changing climate conditions.
SMART GROWTH
Principles for Sustainable Cities
Characteristics promoting sustainable urban development encompass:
Mixed-use developments: Encourage diversity of use in proximity enhancing the livability of urban areas.
Compact building designs: Efficient use of land preserving open space while improving density.
Variety of transportation choices: Investing in public transportation options and pedestrian pathways, while prioritizing green spaces.
EXAMPLES OF SMART GROWTH
Examples of cities that effectively implement smart growth principles include:
Melbourne: Known for mixed-use developments and a commitment to sustainability.
Vienna: Sympathetic to public transport and urban planning prioritizing community needs.
Vancouver: Innovative policies that promote green spaces and urban biodiversity.
Promoting Sustainable Changes
Agents for Change
Everyone has the potential to be an agent for change, reinforcing the notion that significant impacts can arise from individuals who may not hold positions of power or authority. This encourages grassroots movements and emphasizes collective action, showing that ordinary people can drive extraordinary change in their communities.
Fostering Sustainable Behavior
A Necessity for a Sustainable Future Society
The path to sustainability is not just about policy changes; it also requires shifts in individual behaviors and societal norms. The following are key components that facilitate this transition:
Ease of Integration: Sustainable behaviors should be simple to adopt and seamlessly integrated into daily life. This requires design and innovation to minimize inconvenience.
Emotional Satisfaction: Engaging in sustainable practices can be emotionally rewarding. For instance, community gardening not only provides food but also builds community ties.
Tangible Benefits: Individuals are more likely to adopt new practices if they can see direct benefits. For example, energy-efficient appliances save money on utility bills, creating a win-win scenario.
Positive Vision
Adopting a positive vision means focusing on the goals of sustainability—such as clean air, healthy ecosystems, and a stable climate—rather than solely addressing the challenges and crises that threaten our environment. This shift in perspective can be motivating and empowers individuals to contribute positively.
Using Social Marketing Principles for Change
The 4 Ps of Social Marketing
Product: Proactive sustainability actions can be thought of as valuable products that offer specific benefits to individuals and society.
Price: It is essential to consider the overall costs involved in adopting sustainable practices, whether they come in the form of time, convenience, or financial investment.
Place: Sustainability initiatives must be easily accessible in the community, ensuring that people can take action in their everyday environments.
Promotion: Effective communication strategies are crucial for raising awareness and advocacy regarding sustainability. Campaigns must be tailored to resonate with diverse audiences.
Successful change also heavily relies on the power of social networks. For example, when individuals see their friends and family practicing sustainable behaviors, they are more likely to adopt similar practices themselves.
Misuse of Ecolinguistics
Semantic Vagueness
Language plays a significant role in sustainability communication. Words can have unclear or vague meanings, leading to confusion about environmental actions. Clarity in messaging is essential to avoid misunderstandings about what actions are genuinely sustainable.
Ecobabble
Ecobabble refers to the use of technical jargon without a clear understanding. This language may project an eco-conscious persona but often lacks substance and can alienate those who are not familiar with the terminology.
Greenwashing
Greenwashing is the practice employed by some companies of using misleading language and marketing to create a false impression of environmental responsibility. Recognizing these tactics is vital to ensure consumer awareness and accountability.
Communication
The Power of Visuals
Visual communication is a powerful tool in sustainability messaging. A compelling image can convey complex ideas quickly and effectively, making it crucial for advocacy campaigns. Using relatable visuals helps in building emotional connections with the audience.
Given that the average typing speed is about 25 words per minute, fast, effective communication is critical for advocacy; messages must be crafted in a way that captures attention quickly.
Landscape Change Assessment in the Mid-Atlantic Region
Landscape change poses significant threats to aquatic and terrestrial ecosystems. Urban sprawl throughout the Mid-Atlantic has negatively impacted surface waters and habitats, highlighting the urgent need for assessment and action.
The Landscape Sciences Program aims to monitor these changes over time. It utilizes a comprehensive database that includes information on stream conditions, bird populations, and broader landscape shifts.
Methodology
Data Acquisition: Collect and process land-cover data from two historical time periods (early 1970s and early 2000s) to identify trends.
Modeling: Develop nitrogen load and bird habitat models that reflect the changing land cover.
Comparison: Evaluate model outputs to detect trends in nitrogen levels and bird habitats over time.
Making Sustainability Visible
Building resilient communities is essential for advancing sustainability. A proactive and optimistic mindset should be fostered across all societal levels. A well-known quote reminds us, "The best time to plant a tree was 20 years ago. The next best time is today," urging immediate action towards sustainable practices.
Efforts Big and Small
While large-scale initiatives are impactful, small actions also play a crucial role. Collective power amplifies the influence of individual efforts. Everyone—from governmental bodies to local communities—has a part to play in achieving significant change.
Consensus
Achieving consensus is vital in sustainability discussions. It ensures that diverse voices are heard, leading to collaborative solutions that reflect community needs and values.
Notable Agents for Change
Recognizing prominent figures advocating for sustainability serves as inspiration. Notable agents include:
Sir David Attenborough: Naturalist and environmental advocate known for his documentaries that raise awareness about environmental issues.
Bill Gates: Philanthropist who focuses on global issues, including climate change and renewable energy solutions.
Greta Thunberg: Youth climate activist whose movements have galvanized millions to push for immediate climate action.
Lesein Mutunkei: Environmental activist and footballer advocating for sustainability initiatives within and beyond sports.
Education as a Tool for Change
Key Focus Areas
Education is a foundational tool in promoting sustainability, with key areas that include:
Eco-literacy: Understanding ecological principles and their applications.
Intergenerational Resilience: Fostering skills and knowledge that enable communities to adapt and thrive environmentally.
Empowering Communities: Providing individuals with the tools to implement sustainable practices and advocate for their needs.