Methodology

How the edition was made: methods, the model card, the evidence cut and its age, the acceptance record and the glossary.

13 min read0 figures13 tables16 notesNR-REGIONAL-OCP-2026-BASELINE

Contents

A.1Methods

The regional baseline uses published values and four simple derivations. Each is shown in full so that any reader can reproduce it.

Table A.1Methods
No.	Derivation	Calculation	Result
(1)	Australia emissions per person excluding land use, 2024	591.454 ÷ 27.194286	21.7 t CO₂e
(2)	Papua New Guinea emissions per person excluding land use, 2024	10.7611 ÷ 10.576502	1.02 t CO₂e
(3)	Fiji emissions per person excluding land use, 2024	2.7509 ÷ 0.928784	2.96 t CO₂e
(4)	Pacific island small states emissions per person excluding land use, 2024	6.5372 ÷ 2.722467	2.40 t CO₂e
(5)	Ratio of GDP per person, Australia to the Pacific island small states, 2024	64,610 ÷ 4,528	14.3 times

Table A.2Coupling strength scale (matrix and model card)
Strength	Definition
STRONG	a disruption in the source system has historically changed the target system’s service or output within one season, in more than one region
MODERATE	an effect is documented but buffered or slower
WEAK	an effect is plausible but not documented at regional scale

Table A.3Status grammar
Label	Rule
Reported	value as issued by its source, with year
Inferred	reasoned from cited evidence; never a measurement
Estimated	Nexus analytical value with stated method
Scenario	conditional on stated assumptions
Expert input	structured editorial judgement awaiting evidence

A.2Model card: Regional System Model v0

Model ID: MDL-OCP-REGIONAL · v0.1
Purpose: represent Oceania-Pacific as coupled water, energy, food, health and biodiversity systems across member countries, with forcing and transmission layers
Family: graph-based system of systems
Inputs: the cited sources of this edition; no proprietary data
Method: expert-specified coupling strengths (STRONG · MODERATE · WEAK) from assessments and analogue events
Validation: none yet, first validation against federation evidence in 2027
Uncertainty: qualitative; strengths are hypotheses, not measurements
Domain of validity: regional scale; not for national, basin or asset-level use
Reproducibility: strength table and sources published in this edition

20couplings

typed in v0

11strong

documented within one season

5moderate

documented, buffered

4weak

plausible, undocumented

A.3The baseline evidence cut

Every Nexus edition is published from a frozen evidence cut. The regional baseline cut is documentary: it pins the exact edition of every source cited. Federation cuts begin with the first national Foundry cuts in 2027.

Cut ID: NQ-REG-OCP-2026-Q0-1
Type: baseline documentary cut
Resolution policy: pinned · as of 30 September 2026
Sources pinned: 55 cited sources, each at the edition and access date in the references
Model runs: none at baseline, analytical values are stated with their method
Digest: computed at freeze and recorded in the publication record
Supersedes: nothing, first cut of the series
Superseded by: NQ-REG-OCP-2027-Q1-1 at the Q1 2027 close

Lineage

01
source edition
02
pinned citation
03
finding
04
page
05
publication record

Table A.4From the baseline cut to the federation cut
Element	Baseline 2026	2027 regional annual
Sources	cited publications, pinned by edition	national, regional and sector cuts through one graph
Analysis	stated methods and editorial estimates	typed analysis specifications
Models	Regional System Model v0 specification	model runs with receipts
Findings	twelve baseline findings	findings re-bound to federation evidence
Review	five passes scheduled	five passes on the exact digest

A.4Evidence age and coverage

A 2026 edition rests on evidence observed in many different years. This page shows each time base, so that no single year label hides older evidence.

Table A.5Evidence age and coverage
Indicator	Observed	Released	Cadence	Next release
Population, Australia	March 2026	Sep 2026	quarterly	Dec 2026 release
Regional population	2024–25	Mar 2026	annual	annual
Emissions, World Bank series	2024	Oct 2026	annual	annual
Electricity generation, Australia	2025	Oct 2026	annual	annual
Electricity access	2023	Oct 2026	annual	annual
Water Account	2023–24	Dec 2025	annual	annual
Life expectancy, ABS	2022–2024	Nov 2025	annual	annual
WMO South-West Pacific	2024	Jun 2025	annual	next assessment
Protected areas	2024	Oct 2026	annual	annual

Table A.6Coverage by system at baseline
System	Coverage	Thinnest dimension
Climate and hazards	PARTIAL	sea-level rate; cyclone losses
Energy	PARTIAL	Pacific mix after 2021; fuel stocks
Water	THIN	access outside Fiji; basin storage
Food	THIN	farm output after 2022
Health	PARTIAL	heat burden
Biodiversity	THIN	reef and coral condition
Finance	THIN	insured and uninsured losses
Digital	THIN	dependency mapping

Table A.7Designed empty states: what is not bound, what would fill it and why
Field	Source that would fill it	Blocker
Registry membership beyond Australia	series registry (data/subjects.federation.json)	the registry holds one country entry for this region; Pacific island states have no subject, so no national edition can join this one
Regional hub	series registry	the registry records the hub as to be designated
Sea-level rise rate for the South-West Pacific, mm per year	WMO State of the Climate in the South-West Pacific 2024, full report¹⁷	the pages opened state that sea level exceeds the global average but give no rate; the report file returned only images
Cyclone counts and losses for Pacific island countries, 2024 to 2026	Pacific Islands Forum, regional meteorological services and reinsurers	not retrieved; the WMO figures read cover the Philippines, outside the series
Pacific island population totals and censuses	Pacific Community PDH.stat⁴³ and UN World Population Prospects⁴⁴	Pacific Data Hub returned 403; search results gave conflicting totals of 9.5 and 11 million for the member territories
Pacific island electricity generation mix after 2021	IRENA Renewable Capacity Statistics⁴⁵	host returned 403; the World Bank series stops at 2021
Latest-quarter renewable share of the Australian National Electricity Market	AEMO Quarterly Energy Dynamics⁴⁷	host returned 403
Australian inventory detail by sector and land use, year to March 2026	DCCEEW quarterly update³⁰	host returned 503; headline values come from a search summary only
Heat-related deaths and admissions in Australia and the Pacific	AIHW Australia’s Health⁵⁰ and WHO Western Pacific Region	host returned 403; no regional series located
Murray-Darling Basin storage at 1 November 2026	Murray-Darling Basin Authority⁴⁹	host returned 403
Winter crop production and farm output, 2025 to 2026	ABARES Australian Crop Report⁴⁸	host returned 503; the ABS series opened ends in 2021–22⁶
Safely managed drinking water for Australia, Papua New Guinea and the Pacific island small states	WHO and UNICEF Joint Monitoring Programme	the World Bank series returned no value for these three; only Fiji (2022) has one
Great Barrier Reef and Pacific coral condition	Australian Institute of Marine Science monitoring and SPREP⁵³	not retrieved
Capability rungs: early warning, reserves, response, recovery, social protection, infrastructure, workforce	meteorological services, civil protection agencies, utilities and ministries	not reviewed by evidence close

A.5Evidence cards: two anchor sources

Issued by the Australian Bureau of Statistics. Quarterly. Role: binds the Australian population figure in the profile and regional reading. The total includes Other Territories.

EVD-OCP-001

Estimated resident population, March 2026¹

Issued by the World Bank, updated 8 October 2026. Annual. Role: binds the emissions, population and reference-series values. The Pacific island small states value is a World Bank aggregate.

EVD-OCP-002

World Bank World Development Indicators, 2024 emissions and population⁷⁸

Table A.8Quality dimensions at baseline
Dimension	EVD-OCP-001	EVD-OCP-002
Completeness	Australia from its statistics office; reference series for Fiji, Papua New Guinea and the Pacific island small states from one database	Australia and the reference series
Timeliness	about 6 months after the reference date	about 2 years after the reference year
Revision	ABS revises estimates in later releases	database revisions on each update
Method transparency	published methodology	published methodology
External validation	not assessed in this edition	not assessed in this edition

Evidence cards to follow in Q1 2027

DCCEEW quarterly inventory update³⁰ : land-use treatment on one basis
WMO South-West Pacific full report¹⁷ : sea-level rate
IRENA statistics⁴⁵ : island generation mix
Reports Foundational Edition⁵⁴ and the global baseline²⁷ : method and peer distributions

A.6Publication acceptance record

Editorial self-check at evidence close. Every applicable item carries a disposition; the remaining items are review, approval and deposit.

Table A.9Publication acceptance record
Group	Area	Items	Pass	N/A	Pending
D1	Identity and scope	8	8	0	0
D2	Source and data	12	9	1	2
D3	Analysis and models	12	3	8	1
D4	Findings and claims	9	8	0	1
D5	Figures, tables, maps	10	6	2	2
D6	Editorial and citations	10	8	0	2
D7	Review and approval	13	0	0	13
D8	Artefact and design	12	7	0	5
D9	Registry and release	9	0	0	9

Publication gate

Conditions met: 14 of 23 at evidence close
Blocking problems: none recorded
Open conditions: reviews, approval of the exact digest, deposit, registry pointer

Not applicable at baseline

Model runs: first runs in Q1 2027
Maps: plates in Q2 2027
Waivers: none

A.7Status words

Table A.10The status every value carries
Status	What it means
Observed	Measured directly and published by the source.
Reported	Published statistics of an official or institutional source.
Declared	Stated by the body concerned; not independently measured.
Estimated	A Nexus estimate from cited evidence, with its method in Annex A.
Modelled	Produced by a stated model from cited inputs.
Inferred	Reasoned from cited evidence; not measured.
Forecast	A projection by the cited source.
Simulated	A simulation result under stated assumptions.
Scenario	A conditional statement under stated assumptions; never a prediction.
Expert input	Expert judgement, recorded with its basis.
Candidate	Proposed for a later edition; not yet evidence.
Evidence-quality levels (EQL 1 to 5) grade the source behind a value; they are not a score of the subject.

A.8How the edition is made, released and corrected

Every edition is built from a sealed evidence cut, reviewed under three keys, signed and deposited before any site shows it as published; corrections go to Nexus Standards as change proposals and feed the next cut.

Step	What happens	Source
01 Evidence arrives from the pillars	Foundry seals observations and indicator series, Universe hands over after-action and scenario findings, and contributions are screened at every gateway, including this site’s.
02 The cut is sealed	On the cut date the evidence is pinned under one identifier, so anyone can rebuild the edition from exactly what it was built on.
03 The edition is assembled	The edition is drafted from its template and content pack. Agents may draft; they never publish and never decide.
04 The keys turn	At the publisher of record the truth key comes first: every value is checked against its source or stated method before the meaning and capital keys turn. No edition moves on until every key has been turned by a named steward.
05 The gate opens	A named approver releases one exact digest of the edition; any change after this point is a new version, never a silent edit.
06 Signed and deposited	The PDF, the web edition and the data bundle are signed together with a manifest and an RO-Crate description, and deposited on Zenodo with a concept and a version DOI.
07 Published on its desk’s site	Only then does the edition show as published on its desk’s Reports site, and the Collection lists it as a part.
08 Corrections go to Standards	Method and correction findings go to Nexus Standards as change proposals; citations, corrections and new contributions feed the next evidence cut.

A teaching model of the process, not a forecast and not a record of any run; dates and counts on this page come from the programme record. Sources: Reports governance at GCRI Canada (2026); Zenodo, repository of record for Reports deposits (2026).

Lifecycle, one state at a time: Draft, Computed, Evidence bound, Reviewed, Approved for release, Published, Corrected, Superseded. This edition is a draft.

A.9Glossary and abbreviations

Table A.11Series terms
Term	Meaning
Baseline Edition	the inaugural annual edition that fixes the reference state for the series
WEFH+B	water, energy, food, health and biodiversity, the national nexus core
Coupling	a typed dependency through which one system transmits to another
Protection gap	the share of losses not covered by insurance
Capability ladder	LISTED → EXISTS → ADEQUATE → TESTED → DEMONSTRATED
EQL	evidence-quality level, 1–5
Evidence cut	a frozen resolution of exact sources and versions
NNC · NLC · NWG	National Nexus Consortium · National Leadership Council · National Working Groups

Table A.12Abbreviations used in this edition
Abbreviation	Expansion
ABS	Australian Bureau of Statistics
ADB	Asian Development Bank
AEMO	Australian Energy Market Operator
BoM	Bureau of Meteorology
DCCEEW	Department of Climate Change, Energy, the Environment and Water
GL	gigalitre
IPCC	Intergovernmental Panel on Climate Change
LULUCF	land use, land-use change and forestry
PIF	Pacific Islands Forum
SPC	Pacific Community
SPREP	Secretariat of the Pacific Regional Environment Programme
UNDRR	United Nations Office for Disaster Risk Reduction
WHO	World Health Organization
WMO	World Meteorological Organization

A.10Technical annex

Table A.13Technical annex
Item	Annex	Contents	Status
A.1	Indicator definitions	the regional indicator set, with units and sources	IN THIS EDITION
A.2	Coupling strengths	the twenty-cell matrix and its rationale	IN THIS EDITION
A.3	Scenario specification	SCN-OCP-CYC-01 assumptions and signposts	IN THIS EDITION
A.4	Capability placements	rung evidence for fifteen functions	IN THIS EDITION
A.5	Model diagnostics	first runs and validation	2027
A.6	Sensitivity analyses	influence of coupling strengths	2027
A.7	Member-country notes	atlas cards for every member country	Q2 2027
A.8	Review statements	pass-by-pass review record	AT RELEASE

A.1 · indicator definition: emissions excluding land use

Construct: annual greenhouse gas emissions without land use, land-use change and forestry
Unit: Mt CO₂e
Scope: calendar year
Source: World Bank World Development Indicators, series EN.GHG.ALL.MT.CE.AR5⁸
Revision: revised by the issuer; not tracked here
Known limits: differs from the national inventory figure, which includes land use³⁰

Notes

Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references

17World Meteorological Organization (ed.), State of the Climate in the South-West Pacific 2024 (series page, published 5 June 2025). WMO, Geneva. Observation year 2024. Accessed 2026-11-03.back
43UNVERIFIED, not opened: Pacific Community (ed.), PDH.stat population projections and estimates (Pacific Data Hub; the host returned 403; a search result noted a change of basis to UN World Population Prospects 2024 in April 2025). SPC, Noumea. Observation year 2025. Accessed 2026-11-03.back
44UNVERIFIED, not opened: United Nations Department of Economic and Social Affairs, Population Division (ed.), World Population Prospects 2024. United Nations, New York, 2024. Observation year 2024. Accessed 2026-11-03.back
45UNVERIFIED, not opened: International Renewable Energy Agency (ed.), Renewable Capacity Statistics 2026 (not read; the IRENA host returned 403). IRENA, Abu Dhabi. Observation year 2025. Accessed 2026-11-03.back
47UNVERIFIED, not opened: Australian Energy Market Operator (ed.), Quarterly Energy Dynamics (latest quarter at evidence close not read; the AEMO host returned 403). AEMO, Melbourne. Observation year 2026. Accessed 2026-11-03.back
30UNVERIFIED, not opened: Department of Climate Change, Energy, the Environment and Water (ed.), National Greenhouse Gas Inventory Quarterly Update: March 2026 (released 28 August 2026; about 455.6 Mt CO₂e, down 1.6%, 25.0% below 2005; preliminary June 2026 estimate 452.4 Mt; all from search summaries; the department host returned 503). DCCEEW, Canberra. Observation year 2026. Accessed 2026-11-03.back
50UNVERIFIED, not opened: Australian Institute of Health and Welfare (ed.), Australia’s Health 2024 (the AIHW host returned 403). AIHW, Canberra, 2024. Observation year 2024. Accessed 2026-11-03.back
49UNVERIFIED, not opened: POST-CLOSE, context only: Murray-Darling Basin Authority (ed.), Basin water storage (storage on 1 November 2026 not read; the host returned 403). MDBA, Canberra. Observation year 2026. Accessed 2026-11-03.back
48UNVERIFIED, not opened: Australian Bureau of Agricultural and Resource Economics and Sciences (ed.), Australian Crop Report (latest edition not read; the ABARES host returned 503). ABARES, Canberra. Observation year 2026. Accessed 2026-11-03.back
6Australian Bureau of Statistics (ed.), Agricultural Commodities, Australia, 2021–22 (final issue; the page carries two release dates; wheat 36 million tonnes, 369 million hectares of agricultural land). ABS, Canberra. Observation year 2022. Accessed 2026-11-03.back
53UNVERIFIED, not opened: Secretariat of the Pacific Regional Environment Programme (ed.), State of Environment and Conservation in the Pacific Islands: 2020 Regional Report (listed from memory). SPREP, Apia, 2020. Observation year 2020. Accessed 2026-11-03.back
1Australian Bureau of Statistics (ed.), National, state and territory population, March 2026 (released 17 September 2026; 27,921,150 residents, up 392,700 or 1.4%). ABS, Canberra. Observation year 2026. Accessed 2026-11-03.back
7DATA VINTAGE AFTER CLOSE: World Bank (ed.), World Development Indicators: population, total (SP.POP.TOTL), Australia, Fiji, New Zealand, Papua New Guinea and Pacific island small states (source updated 2026-10-08). World Bank, Washington DC. Observation year 2024. Accessed 2026-11-03.back
8DATA VINTAGE AFTER CLOSE: World Bank (ed.), World Development Indicators: total greenhouse gas emissions excluding LULUCF (EN.GHG.ALL.MT.CE.AR5), Australia, Fiji, Papua New Guinea and Pacific island small states (source updated 2026-10-08). World Bank, Washington DC. Observation year 2024. Accessed 2026-11-03.back
54UNVERIFIED, not opened: S. Valadbaygi (ed.), Reports: The Foundational Edition, Volumes I and II. Reports series, Edition 2026–2030, V1.0. The Global Centre for Risk and Innovation (GCRI) for the Nexus Consortium, Toronto, 2026. Observation year 2026. Accessed 2026-11-03.back
27S. Valadbaygi (ed.), Global Systems Risk & Resilience Report 2026: Baseline Edition (draft pack read as the structural base of this edition). GCRI for the Nexus Consortium, Toronto, 2026. Observation year 2026. Accessed 2026-11-03.back

Cite this annex

Valadbaygi, S. (Ed.). (2026). Annex A: Methodology. In Oceania-Pacific Regional Systems Risk and Resilience Report 2026: Baseline Edition, The State of Oceania-Pacific’s Interdependent Systems. (Baseline Edition 2026, Report No. NR-REGIONAL-OCP-2026-BASELINE) [Draft under review]. The Global Centre for Risk and Innovation (GCRI).

Every citation form of the whole report, BibTeX and RIS included, is on the edition home. Cite this report

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