联合国与落基山研究所《战胜高温：城市可持续降温指南手册》-208页_10mb

Summary of Beating the Heat: A Sustainable Cooling Handbook for Cities

Core Content

Beating the Heat: A Sustainable Cooling Handbook for Cities is a comprehensive report published by the United Nations Environment Programme (UNEP) in 2021, aimed at providing cities with actionable strategies to address the growing challenge of urban heat. The report is part of the UNEP Cool Coalition initiative and is structured into 12 chapters, each focusing on different aspects of sustainable urban cooling.

Main Objectives

• To present a holistic approach to sustainable urban cooling.
• To identify key intervention strategies for cities to mitigate urban heat.
• To offer practical guidelines for developing a cooling action plan.
• To highlight case studies and examples from around the world to demonstrate effective cooling practices.

Key Chapters and Main Points

Chapter 1: Introduction

• Cities are warming faster than the global average due to the urban heat island effect.
• Urban heat has significant health, economic, and environmental impacts.
• The report emphasizes the urgent need for sustainable cooling solutions to prevent heat-related risks and support climate resilience.

Chapter 2: Why a Strategic, Whole-System Approach Is Key to Sustainable Urban Cooling

• A whole-system approach considers urban form, infrastructure, building design, and cooling technologies together.
• Reducing heat at the urban scale through planning and infrastructure can significantly lower cooling demand.
• Improving building energy efficiency and using efficient cooling technologies are essential for reducing energy use and emissions.
• Holistic strategies lead to greater synergies and more effective outcomes in urban cooling.

Chapter 3: Barriers to Sustainable Urban Cooling and Interventions to Address Them

• Barriers include lack of awareness, limited funding, and fragmented policies.
• Key interventions focus on urban planning, building codes, green infrastructure, and cooling technologies.
• Collaboration between different stakeholders is necessary for successful implementation.

Chapter 4: Guidelines for Cities for Developing a Cooling Action Plan

• Provides a step-by-step framework for cities to develop a cooling action plan.
• Encourages prioritization of interventions based on local conditions and needs.
• Offers a matrix to support strategic assessment of cooling initiatives.

Chapter 5: City's Baseline Assessment as the Starting Point for Action

• Baseline assessments are crucial for identifying heat risks and cooling needs.
• Key factors include temperature data, population density, and urban design characteristics.
• Case studies from Western Sydney and Hanoi demonstrate how baseline assessments guide cooling strategies.

Chapter 6: Heat-Resilient Urban Design and Infrastructure

• Focuses on urban form, green spaces, and cool surfaces to reduce heat.
• Nature-based solutions like green corridors and urban forests are highlighted.
• Cool surfaces, such as reflective pavements and cool roofs, play a critical role in reducing urban temperatures.
• Case studies from Ljubljana, Medellín, and Barcelona illustrate successful urban cooling design.

Chapter 7: District Cooling

• District cooling is introduced as a centralized system for providing cooling to buildings.
• It is more efficient and sustainable compared to individual air conditioning systems.
• Three primary business models are outlined, along with feasibility analysis considerations.
• Case studies from Paris, GIFT City, Singapore, Toronto, Dubai, and others provide real-world examples.

Chapter 8: Energy-Efficient and Thermally Efficient Buildings

• Highlights the importance of building codes and energy efficiency standards.
• Discusses the role of cities in enforcing and supporting building efficiency.
• Examples include the Chicago Energy Rating System and the Energy Performance of Buildings Directive.
• Case studies from Toronto and Boulder showcase how cities can lead in building efficiency.

Chapter 9: Cities Leading by Example

• Cities can lead by example through public sector initiatives and policy frameworks.
• Examples include the use of BREEAM® certification in the UK and the "Growing Green Guide" in Melbourne.
• Emphasizes the importance of leadership in promoting sustainable cooling practices.

Chapter 10: Community-Centric Initiatives to Advance Heat Equity and Access to Cooling

• Addresses the unequal distribution of heat impacts and promotes equitable cooling access.
• Includes community engagement, cooling centers, and public awareness campaigns.
• Case studies from Ahmedabad, Philadelphia, and Singapore illustrate effective community-based cooling strategies.

Chapter 11: Awareness and Capacity-Building to Support Sustainable Urban Cooling

• Importance of raising awareness and educating the public on heat risks and cooling solutions.
• Capacity-building through training programs and volunteer initiatives.
• Examples include the "Million Trees NYC" program and the "Cool Roofs Training Programme" in New York City.
• Partnerships with utilities and local governments are emphasized for successful implementation.

Chapter 12: Funding and Financing Sustainable Urban Cooling Interventions

• Explores various funding sources, including government bonds, revolving loan funds, and green mortgages.
• Discusses the role of local governments and the need for innovative financing models.
• Case studies from Miami, Finland, Sweden, and Mexico provide insights into financing strategies.

Key Information

• Urban Heat Island Effect: Cities are warming faster than rural areas due to increased heat absorption from urban surfaces and human activities.
• Health Impacts: Heatwaves are becoming more frequent and severe, leading to increased mortality and health risks.
• Economic Impacts: Cooling costs are rising, with households spending 5-15% of their median income on space cooling.
• Environmental Impacts: The increased use of air conditioning is expected to significantly raise greenhouse gas emissions and contribute to global warming.
• Strategies for Cooling: Include urban planning, green infrastructure, cool surfaces, district cooling, and energy-efficient buildings.
• Case Studies: Highlight successful examples from cities like Paris, Medellín, Singapore, and Ahmedabad, demonstrating practical applications of the strategies outlined.

Conclusion

Beating the Heat underscores the critical importance of sustainable urban cooling in the context of global warming and climate change. It provides cities with a roadmap to implement cooling strategies that are not only effective but also equitable and environmentally responsible. The report encourages collaboration, innovation, and community engagement to ensure that cities can adapt to rising temperatures while reducing their carbon footprint and enhancing public health and well-being.