Task Force on National Greenhouse Gas Inventories

What is the IPCC?

IPCC symposium “Let’s think of climate change and ourfuture in the light of IPCC AR6” (30 November 2022)
Kiyoto Tanabe（Co-Chair, IPCC TFI）

What is the IPCC?
 Intergovernmental Panel on Climate Change Established by WMO and UNEP, which was endorsed by theUN General Assembly in 1988
• In 1980s, climate change drew attention of policy makers as one of theimportant issues that need to be addressed by internationallycooperative and concerted action.
• International community recognized the necessity of scientific,
technological and socio-economic advice to policy makers byindependent scientists.

 195 member governments
 Supported by scientists and experts from all over the world on avoluntary basis• They are not “employed” by the IPCC.

Feature of IPCC
 Unique mechanism to connect scientists and policy makers
on a global scale – unprecedented and unparalleled Regular assessments of the scientific basis of climatechange, its impacts and future risks, and options foradaptation and mitigation• The IPCC does not conduct its own research.

 IPCC Reports are policy-relevant but not policyprescriptive.
 In order to cover various aspects of climate change issues,
it has three Working Groups and one Task Force.

IPCC Plenary

IPCC Secretariat

IPCC Bureau(in Geneva,Switzerland)

IPCC Executive Committee
Working
Group I

Working
Group II

Working
Group IIIThe PhysicalScience Basis

Climate Change
Impacts,
Adaptation andVulnerability

MitigationofClimate Change

TSU

TSU

TSU

TSU

(France/China)(Germany/South Africa)(UK/India)(Japan)Authors, Contributors, Reviewers

Task ForceonNationalGreenhouse
Gas
Inventories(TFI)

GHGs are generated and releasedby human activities

WG1

Increased GHGs in the atmosphere enhance the radiative
forcing of the climate system
Climate changes on a global scale – global averaged
surface temperature rises, sea level rises, global
precipitation pattern changes, …

TFI
How much GHGs
from whatsources?

Social and economic systems are affected byclimate change – economic loss caused byfloods and droughts, increased incidence ofdeath and serious illness, …

WG2
Need for Adaptation

WG3
Need for Mitigation

IPCC leaders(AR6 cycle)

Chair
Hoesung LeeVice
ChairsKo Barrett（USA）

WG1 Co-Chairs

Valérie
MassonDelmotte

PanmaoZhai（France）（China）

Thelma Krug（Brazil）

WG2 Co-Chairs

HansOtto
Pörtner

Debra
Roberts（Germany） （South Africa）

Youba Sokona（Mali）WG3 Co-Chairs

TFI Co-Chairs

Jim Skea

Priyadarshi
R. Shukla

EduardoCalvo
Buendía

KiyotoTanabe（UK）（India）（Peru）（Japan）

IPCC Secretariat and TSUs
WG1 TSU(France,China)(France)

WG2
WG2 TSUTSU(Germany(Germany, &South Africa)
Africa)South

TFI TSU(Japan) 1999-

IPCC Secretariat(in Geneva,Switzerland)

WG3TSUWG3 TSU(UK,(UK&India)
India)

Technical Support Units during AR6 cycle (2015-2023)

Assessment Reports
 Composed of the full scientific and technical assessment ofclimate change, generally in three volumes by three WorkingGroups.
IPCC

UNFCCCFirst Assessment Report (FAR: 1990）

UNFCCC (1992)

Second Assessment Report (SAR: 1995）

Kyoto Protocol (1997)

Third Assessment Report (TAR: 2001)

Marrakesh Accord (2001)

Fourth Assessment Report (AR4: 2007)

Bali Action Plan (2007)
Copenhagen Accord (2009)
Cancun Agreements (2010)

Fifth Assessment Report (AR5: 2013-14)

Paris Agreement (2015)

Sixth Assessment Report (AR6: 2021-23)?????

Special Reports, Methodology Reports
 Special Reports
Assessment of a specific issue by Working Group(s) andgenerally follows the same structure as a volume of an
Assessment Report• Aviation and the Global Atmosphere (1999)• Carbon Dioxide Capture and Storage (2005)• Renewable Energy Sources and Climate Change Mitigation (2011)/etc.

 Methodology Reports
Practical guidelines for the preparation of greenhouse gas
inventories produced by TFI• 2006 IPCC Guidelines for National Greenhouse Gas Inventories/etc.

IPCC Reports during AR6 cycle

IPCC Reports during AR6 cycleOct Global Warming of 1.5°C
2018 (SR15)

Aug AR6 Climate Change 2021:
2021 The Physical Science
Basis (WGI)

May 2019 Refinement to2019 the 2006 IPCC Guidelines
for NationalGreenhouse
Gas Inventories

Feb AR6 Climate Change 2022:
2022 Impacts, Adaptation andVulnerability (WGII)Aug Climate Change and Land2019 (SRCCL)

Apr AR6 Climate Change 2022:
2022 Mitigation of Climate
Change (WGIII)

Sep The Ocean and2019 Cryospherein a Changing Climate(SROCC)Mar AR6 Synthesis Report: Climate
2023 Change 2023
In preparation…

Future of the IPCC：7th Assessment Cycle (AR7 cycle)
 At the 59th Session of IPCC in July 2023, members of IPCC
Bureau and Task Force Bureau for the AR7 cycle will beelected. Then, the AR7 cycle starts.
 The length of AR7 cycle shall be between 5 and 7 years.
(Decision IPCC-LVII- 6)
 Work plan for the AR7 cycle will be considered by the newly
elected Bureau, and decided by the Panel. However, it wasalready decided to produce the following two IPCC Reports
during the AR7 cycle.
• Special Report on Climate Change and Cities• Methodology Report on Short-lived Climate Forcers (SLCF)

Thank you for your attention.
For details of IPCC, please visit:

http://www.ipcc.ch/