Overview
The Interim Climate Change Committee was a ministerial advisory committee established by the New Zealand Government in mid-April 2018. This body was created to explore how New Zealand could transition to a net zero emissions economy by 2050. The committee served as a key policy instrument during the initial phase of the nation’s climate change response strategy. Its primary mandate involved analyzing pathways and recommendations for reducing greenhouse gas emissions across various sectors of the New Zealand economy. The committee operated under the direct oversight of the New Zealand Government, functioning as an interim measure to lay the groundwork for more permanent institutional arrangements. The establishment of the committee in 2018 marked a significant step in the country’s efforts to address climate change through structured, evidence-based policy advice. The committee’s work focused on identifying practical and effective strategies for achieving the 2050 net zero target, considering both economic and environmental factors. The New Zealand Government relied on the committee’s findings to inform subsequent legislative and policy decisions related to climate change. The committee’s interim nature meant that its recommendations were intended to be foundational, setting the stage for the creation of a more permanent and independent body to oversee long-term climate goals. The committee’s work was critical in shaping the early discourse around New Zealand’s climate change response, providing a structured approach to a complex and multifaceted challenge. The committee’s findings and recommendations were instrumental in guiding the New Zealand Government’s initial steps toward a net zero emissions economy. The committee’s role was to provide expert advice and analysis to support the government’s decision-making process. The committee’s work was characterized by a focus on practical, actionable recommendations that could be implemented in the short to medium term. The committee’s establishment in 2018 was a response to the growing urgency of addressing climate change and the need for a coordinated, national approach to emissions reduction. The committee’s work was seen as a critical component of New Zealand’s broader climate change strategy, providing a framework for future policy development. The committee’s recommendations were intended to be comprehensive, covering a wide range of sectors and issues related to climate change. The committee’s work was designed to be collaborative, involving input from various stakeholders and experts in the field of climate change. The committee’s establishment in 2018 was a significant milestone in New Zealand’s efforts to address climate change, marking the beginning of a more structured and systematic approach to emissions reduction. The committee’s work was intended to be forward-looking, providing a roadmap for New Zealand’s transition to a net zero emissions economy by 2050. The committee’s recommendations were intended to be flexible, allowing for adjustments and refinements as new information and challenges emerged. The committee’s work was seen as a critical component of New Zealand’s broader climate change strategy, providing a framework for future policy development.
Mandate and Terms of Reference
The Interim Climate Change Committee (ICCC) was established as a ministerial advisory body by the New Zealand Government in mid-April 2018. Its primary mandate was to explore pathways for New Zealand to transition to a net zero emissions economy by 2050. The committee’s work was modeled after the United Kingdom’s Committee on Climate Change, aiming to provide structured, evidence-based advice to inform national climate policy.Emissions Trading Scheme and Agricultural Methane
A critical component of the ICCC’s terms of reference involved analyzing the arrangement of surrender obligations for agricultural emissions within the New Zealand Emissions Trading Scheme (NZ ETS). Specifically, the committee was tasked with evaluating how agricultural methane and nitrous oxide emissions should be accounted for and surrendered under the trading mechanism. This analysis was essential for determining the most effective economic instruments to drive reductions in the agricultural sector, which is a significant contributor to New Zealand’s overall carbon footprint. The ICCC’s recommendations on these surrender obligations were intended to guide legislative adjustments to the NZ ETS, ensuring that agricultural emissions were managed in a way that aligned with the broader net zero target.Renewable Electricity Transition
In addition to agricultural emissions, the ICCC was mandated to plan for the transition to 100% renewable electricity by 2035. This objective required the committee to assess the current state of New Zealand’s electricity generation mix and identify the necessary infrastructure, policy, and market mechanisms needed to achieve full renewable penetration within the specified timeframe. The committee’s work on this front involved evaluating the potential of various renewable energy sources, such as hydro, wind, and solar, and considering the challenges of grid stability and storage. The goal was to provide a clear roadmap for the New Zealand Government to follow in order to decarbonize the electricity sector, which is a key pillar of the national net zero strategy. The ICCC’s advisory role was interim in nature, designed to lay the groundwork for a more permanent institutional framework. Its findings and recommendations were instrumental in shaping the Climate Change Response Amendment Act, which led to the creation of the independent Climate Change Commission. The ICCC was officially superseded and replaced by this new commission in November 2019, marking the transition from an interim advisory body to a statutory independent entity tasked with ongoing climate change oversight and reporting. This structural change reflected the New Zealand Government’s commitment to embedding climate change considerations into the long-term policy landscape, ensuring that the insights generated by the ICCC would continue to influence national decision-making.Membership and Leadership
The membership of the Interim Climate Change Committee was announced on 17 April 2018 by Minister James Shaw (per New Zealand Government records). The committee was structured with a chair and deputy chair, alongside five additional members, all selected for their expertise to advise on the transition to a net zero emissions economy by 2050.
Chair and Deputy Chair
Dr David Prentice served as the Chair of the Interim Committee. Dr Lisa Tumahai was appointed as the Deputy Chair. Their leadership roles were central to guiding the committee's initial explorations into New Zealand's climate strategy before the establishment of the independent Climate Change Commission in November 2019.
Committee Members
The remaining members of the committee included Dr Harry Clark, Dr Keith Turner, Dr Jan Wright, and Dr Suzi Kerr. These individuals were selected to provide diverse professional backgrounds relevant to climate change policy and economic transition. The committee operated as a ministerial advisory body created in mid-April 2018 to explore pathways for New Zealand to achieve net zero emissions. The work of this interim group laid the groundwork for the Climate Change Response Amendment Act, which established the permanent independent commission.
Key Proposals: Lake Onslow Pumped Hydro
The Interim Climate Change Committee (ICCC) identified large-scale energy storage as a critical component of New Zealand’s transition to a net-zero emissions economy by 2050. A central element of the committee’s 2019 proposals was the development of a major pumped hydro-storage system at Lake Onslow in the Otago region. This proposal aimed to leverage the natural topography of the area to create a significant renewable energy buffer, addressing the variability inherent in wind and solar power generation.
Project Feasibility and Government Response
Following the ICCC’s recommendations, the New Zealand Government moved to assess the viability of the Lake Onslow scheme. In 2020, Minister Megan Woods announced the commencement of a comprehensive feasibility study. This study was designed to evaluate the technical, economic, and environmental impacts of constructing the facility. The government’s endorsement signaled a shift from theoretical modeling to concrete planning, positioning Lake Onslow as a flagship project for national energy security.
Employment and Construction Timeline
The Lake Onslow pumped hydro project was projected to generate substantial employment opportunities. Estimates indicated that between 3500 and 4500 people could be employed during the construction phase. The build was expected to last four to five years, followed by a two-year period required to fill the reservoir. This timeline reflects the scale of civil engineering works needed to transform the lake into a functional energy storage asset.
| Project Detail | Value |
|---|---|
| Location | Lake Onslow, Otago |
| Proposal Year | 2019 |
| Feasibility Study Announcement | 2020 |
| Announcing Minister | Megan Woods |
| Estimated Employment | 3500–4500 people |
| Construction Duration | Four to five years |
| Reservoir Fill Time | Two years |
Transition to the Climate Change Commission
The Interim Climate Change Committee served as a foundational policy mechanism established by the New Zealand Government in mid-April 2018. Its primary mandate was to explore the pathways required for New Zealand to transition to a net zero emissions economy by 2050. The committee operated as a ministerial advisory body, providing critical research and analysis to inform national climate strategy. This interim phase was designed to lay the groundwork for a more permanent institutional structure, ensuring that legislative reforms were informed by robust economic and environmental data. The committee's work culminated in the passage of the Climate Change Response (Zero Carbon) Amendment Act. This legislation formally established the independent Climate Change Commission, which superseded the Interim Committee. The official replacement occurred in November 2019, marking a significant shift in New Zealand’s climate governance framework. The transition from an interim advisory group to a statutory independent commission was intended to enhance the credibility and stability of climate policy recommendations. Under the new structure, the Climate Change Commission gained operational independence from the Ministry for the Environment. This separation was designed to reduce political influence over scientific and economic assessments. The Interim Committee handed over its extensive research, analysis, and preliminary recommendations to the new Commission. This handover ensured continuity in the policy development process, allowing the Commission to build upon the foundational work completed during the interim period. The establishment of the independent Commission represented a commitment to long-term climate action. By moving away from a temporary ministerial advisory model, the New Zealand Government aimed to create a durable institution capable of guiding the country toward its 2050 net zero target. The Interim Climate Change Committee thus played a crucial, albeit temporary, role in shaping the legislative and analytical framework that continues to influence New Zealand’s climate response strategy.Why it matters
The Interim Climate Change Committee (ICCC) served as a critical policy bridge in New Zealand’s transition toward a net-zero economy, operating from mid-April 2018 until November 2019. As a ministerial advisory body, its primary mandate was to explore pathways for New Zealand to achieve net-zero emissions by 2050, laying the foundational analysis required for subsequent legislative action. The committee’s work was instrumental in shaping the Climate Change Response Amendment Act, which formally established the independent Climate Change Commission to succeed the interim body. This transition marked a shift from provisional advisory mechanisms to a statutory, independent framework for climate governance.
Agricultural Emissions and the NZ ETS
A central challenge addressed during the ICCC’s tenure was the integration of agricultural emissions into the New Zealand Emissions Trading Scheme (NZ ETS). Agriculture has historically represented a significant portion of New Zealand’s carbon footprint, yet its inclusion in the ETS presented complex economic and structural questions for policymakers. The ICCC’s analysis helped clarify how agricultural sectors could be effectively priced and managed within a broader net-zero framework, providing the evidence base needed for legislative reform. By examining these specific sectoral challenges, the committee ensured that the resulting legislation was not merely aspirational but grounded in the economic realities of New Zealand’s primary industries.
Strategic Planning for Renewable Infrastructure
Beyond policy frameworks, the ICCC’s groundwork extended to the strategic planning of renewable energy infrastructure necessary to support a low-carbon economy. The committee’s explorations included assessments of major infrastructure projects, such as those related to Lake Onslow, which represent critical components of New Zealand’s renewable energy portfolio. By identifying the infrastructure gaps and opportunities required to meet the 2050 net-zero target, the ICCC provided the New Zealand Government with a clearer roadmap for investment and development. This strategic foresight was essential for aligning energy infrastructure planning with broader climate goals, ensuring that the transition to a net-zero economy was supported by tangible, physical assets. The committee’s decommissioned status reflects the successful transfer of these insights to the permanent Climate Change Commission, which continues to oversee the implementation of these strategic priorities.