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the claim
Global warming causes the expansion of the tropical climate zone
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
5 sources for · 0 against

Multiple observational and climate modeling studies consistently demonstrate that global warming and rising greenhouse gas concentrations drive the poleward expansion of the Hadley circulation and the tropical climate zone.

Evidence for · 5
Hadley Cell Widening: Model Simulations versus Observations
2009 · cited by 285
Global climate model simulations and observations indicate that the Hadley cell widens in response to global warming.
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The analysis

The retrieved papers provide robust evidence from both historical observations and climate models (such as CMIP5 and CMIP6) indicating that global warming and greenhouse gas forcing cause the widening of the Hadley cells, which defines the expansion of the tropical climate belt. No papers refute this relationship.

More for · 4
On the Discrepancies in Tropical Belt Expansion between Reanalyses and Climate Models and among Tropical Belt Width Metrics
2017 · cited by 77
Climate simulations and reanalyses show robust historical and future expansion of the tropical belt via Hadley cell metrics in response to radiative forcings.
Comparison of trends in the Hadley circulation between CMIP6 and CMIP5.
2020 · cited by 56
Single-forcing climate model simulations demonstrate that increasing greenhouse gases cause widening of both Northern and Southern Hemisphere Hadley cells.
Exploiting the Abrupt 4 × CO<sub>2</sub> Scenario to Elucidate Tropical Expansion Mechanisms
2019 · cited by 48
Abrupt CO2 simulations indicate that increased greenhouse gas concentrations drive the poleward shift of the Hadley cell edge, expanding the tropical belt.
Recent and projected changes in climate patterns in the Middle East and North Africa (MENA) region.
2024 · cited by 4
Projections under extreme climate scenarios show subtropical highs migrating poleward, consistent with the projected expansion of the Hadley cells due to warming.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. Hadley Cell Widening: Model Simulations versus Observationspeer-reviewedsupports
  2. On the Discrepancies in Tropical Belt Expansion between Reanalyses and Climate Models and among Tropical Belt Width Metricspeer-reviewedsupports
  3. Comparison of trends in the Hadley circulation between CMIP6 and CMIP5.peer-reviewedsupports
  4. Exploiting the Abrupt 4 × CO<sub>2</sub> Scenario to Elucidate Tropical Expansion Mechanismspeer-reviewedsupports
  5. Global forestation and deforestation affect remote climate via adjusted atmosphere and ocean circulation.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Wetter subtropics in a warmer world: Contrasting past and future hydrological cycles.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Fewer clouds in the Mediterranean: consistency of observations and climate simulations.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Asian anthropogenic aerosol forcing played a key role in the multi-decadal increase in Australian summer monsoon rainfallpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. Anthropogenic forcings reverse a simulated multi-century naturally-forced Northern Hemisphere Hadley cell intensificationpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Migrating is not enough for modern planktonic foraminifera in a changing ocean.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Recent and projected changes in climate patterns in the Middle East and North Africa (MENA) region.peer-reviewedsupports
  12. Deep time evolution of the Latitudinal Diversity Gradient: Insights from mechanistic models.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → SUPPORTED · 9005 Aug 2026
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