Claim check · Issue 007

Do El Niño and greenhouse warming reverse cause and effect?

Start with the exact public claim and its date. Then follow the evidence, context, limitations, and verdict.

  • El Niño
  • ENSO
  • Global temperature
  • Internal variability
  • Greenhouse-gas warming
Case
PB-007-04
Platform
Public article
Account/source
ClimateRealism / Anthony Watts
Claim circulated
August 25, 2026
Evidence reviewed
August 27, 2026
Record updated
August 28, 2026
Public URL
www.affectclimatechange.com/buster/007/el-nino-rising-baseline
01 · Original claim and provenance

What was claimed—and where.

ACC preserves the source identity, public wording, publication date, direct link, and bounded native context before presenting evidence or judgment.

Bounded native ClimateRealism claim crop showing the outlet, article title, author, date, and exact two-sentence claim checked by ACC.
Approved attributed source treatmentBounded native ClimateRealism claim crop showing the outlet, article title, author, date, and exact two-sentence claim checked by ACC. Originally published August 25, 2026 at 11:26 UTC and syndicated at 17:00 UTC; accessed and reviewed August 27. Approved bounded native-source crop for criticism and fact-checking, shown with attribution and direct original, syndicated, and context links; unrelated page content is excluded. This bounded public derivative is checksum-recorded in the evidence package; broader source captures and raw page records are not redistributed here.

Original source · Syndicated copy · Deutsche Welle video being criticized
02 · Claim map

Precise proposition checked

Saying human-caused warming raises the long-term temperature baseline while El Niño temporarily adds warmth reverses the actual causal relationship.

Full post context: A ClimateRealism article published August 25, 2026 criticized a Deutsche Welle video and said that describing a greenhouse-warmed baseline plus El Niño as contributors to record warmth reverses cause and effect; the article was syndicated by Watts Up With That the same day.

Scope of this check: This verdict does not establish that climate change caused the current El Niño, determine how strong it will become, or validate every extreme-weather example in the Deutsche Welle video. Those are separate questions.

03 · Evidence

What the evidence shows

El Niño and human-caused warming operate on different timescales. Greenhouse gases raise the long-term global temperature baseline. El Niño temporarily moves additional ocean heat into the atmosphere, often making an individual year warmer. Both effects can operate simultaneously.

  • IPCC AR6 estimates human-caused warming through 2010–2019 at 1.07°C while internal variability contributed a much smaller amount over the assessed historical period.
  • NOAA explains that El Niño temporarily warms the atmosphere by redistributing heat while greenhouse gases control the long-term trend.
  • Forster et al. estimate that almost all warming averaged over 2015–2024 was human-induced, while individual annual peaks also include internal variability such as El Niño.

Evidence chain

Each source is dated and paired with the finding it supports. The original post establishes what was claimed; it does not decide the scientific verdict.

PB-007-04-S1 · international scientific assessment

AR6 WGI Summary for Policymakers

Published / source period: 2021-08

IPCC · Assesses best-estimate human-caused warming through 2010–2019 at 1.07°C and a much smaller contribution from internal variability over the assessed historical period.

Accessed August 27, 2026

PB-007-04-S2 · government scientific explainer

Where does global warming go during La Niña?

Published / source period: 2022-10-31

NOAA Climate.gov · Explains that ENSO redistributes heat and temporarily affects annual global temperature while greenhouse gases control the long-term trend.

Accessed August 27, 2026

PB-007-04-S3 · peer-reviewed climate indicators update

Indicators of Global Climate Change 2024: annual update of key indicators of the state of the climate system and human influence

Published / source period: 2025

Forster et al. / Earth System Science Data · Estimates that almost all warming averaged over 2015–2024 was human-induced while annual peaks also contain internal variability including El Niño.

Accessed August 27, 2026

04 · Context

What is true

El Niño is a natural cycle that predates industrial warming and can strongly influence year-to-year global temperature. ‘Super El Niño’ is an informal term rather than an official NOAA or WMO classification.

Where the claim fails

The claim presents short-term natural variability as though it replaces the independently measured long-term greenhouse-gas trend. Adding a temporary El Niño boost to a warmer baseline is not a claim that climate change caused El Niño.

05 · Limits

Limits and uncertainty

This verdict does not establish that climate change caused the current El Niño, determine how strong it will become, or validate every extreme-weather example in the Deutsche Welle video. Those are separate questions requiring separate evidence.

06 · Verdict

Assessment after the evidence

False For The Cause-And-Effect Reversal Claim · High confidence

Greenhouse gases raise the long-term baseline while El Niño temporarily redistributes heat. Both can contribute to one warm year without either process causing the other, so the claimed cause-and-effect reversal is false.

How the framing works

Timescale switching and false choice: short-term natural variability is presented as though it replaces the independently measured long-term human-caused trend.

How scientists know

Assessments separate long-term forced warming from internal variability, while observations and ENSO research track how Pacific ocean heat redistribution temporarily affects annual global temperature.

Editorial boundaries

ACC evaluates the claim. It does not infer intent, coordination, funding, deception, or control without direct evidence specific to that attribution.

The source presentation and reuse decision are documented here: Approved bounded native-source crop for criticism and fact-checking, shown with attribution and direct original, syndicated, and context links; unrelated page content is excluded.

Corrections and revision record

Corrections status: No change to the scientific verdict has been recorded.

v1.0 · August 27, 2026
Initial evidence review. Verdict: FALSE for the cause-and-effect reversal claim, high confidence.

From Issue 007’s visual edition

The claim. Then the facts.

The artwork carries the quick version. The complete scientific record begins immediately below.