Evidence map›Paper›PMID 38147646›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2024

Observed humidity trends in dry regions contradict climate models.

Isla R Simpson, Karen A McKinnon, Daniel Kennedy, David M Lawrence, Flavio Lehner, Richard Seager

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

  1. Article
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  9. A theoretical index for understanding distinct land relative humidity trends in observations, reanalyses, and models.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  10. Article
  11. Review
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  14. A half-century of climate change in major agricultural regions: Trends, impacts, and surprises.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Global emergence of regional heatwave hotspots outpaces climate model simulations.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Isla R SimpsonClimate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80305.ORCID 0000-0002-2915-1377
Karen A McKinnonDepartment of Statistics and Data Science, University of California, Los Angeles, CA 90095.ORCID 0000-0003-3314-8442
Daniel KennedyClimate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80305.
David M LawrenceClimate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80305.
Flavio LehnerClimate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80305.ORCID 0000-0003-4632-9701
Richard SeagerOcean and Climate Physics, Lamont-Doherty Earth Observatory, Columbia University, New York, NY 10964.ORCID 0000-0003-4772-9707

Funding

David and Lucile Packard Foundation (PF) NADOC | NOAA | NOAA Research (OAR) NA20OAR4310379DOC | NOAA | NOAA Research (OAR) NA20OAR4310413DOC | NOAA | NOAA Research (OAR) NA21OAR4310349National Science Foundation (NSF) 1852977National Science Foundation (NSF) 1939988National Science Foundation (NSF) 1947282National Science Foundation (NSF) AGS-2127684U.S. Department of Energy (DOE) DE-SC0022070U.S. Department of Energy (DOE) DE-SC0022302
6 · The paper itself

Abstract

Arid and semi-arid regions of the world are particularly vulnerable to greenhouse gas-driven hydroclimate change. Climate models are our primary tool for projecting the future hydroclimate that society in these regions must adapt to, but here, we present a concerning discrepancy between observed and model-based historical hydroclimate trends. Over the arid/semi-arid regions of the world, the predominant signal in all model simulations is an increase in atmospheric water vapor, on average, over the last four decades, in association with the increased water vapor-holding capacity of a warmer atmosphere. In observations, this increase in atmospheric water vapor has not happened, suggesting that the availability of moisture to satisfy the increased atmospheric demand is lower in reality than in models in arid/semi-arid regions. This discrepancy is most clear in locations that are arid/semi-arid year round, but it is also apparent in more humid regions during the most arid months of the year. It indicates a major gap in our understanding and modeling capabilities which could have severe implications for hydroclimate projections, including fire hazard, moving forward.

Indexed as

climate changehumidityhydroclimatemodeling

Identifiers

PMID38147646
PMCPMC10769846

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.