Cited by 472Climate Change and Health ImpactsAir Quality and Health ImpactsThermoregulation and physiological responses

Humidity: a review and primer on atmospheric moisture and human health

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Davis, Robert E., McGregor, Glenn R., Enfield, Kyle B.·2016·Environmental Research

Abstract

Research examining associations between weather and human health frequently includes the effects of atmospheric humidity. A large number of humidity variables have been developed for numerous purposes, but little guidance is available to health researchers regarding appropriate variable selection. We examine a suite of commonly used humidity variables and summarize both the medical and biometeorological literature on associations between humidity and human health. As an example of the importance of humidity variable selection, we correlate numerous hourly humidity variables to daily respiratory syncytial virus isolates in Singapore from 1992 to 1994. Most water-vapor mass based variables (specific humidity, absolute humidity, mixing ratio, dewpoint temperature, vapor pressure) exhibit comparable correlations. Variables that include a thermal component (relative humidity, dewpoint depression, saturation vapor pressure) exhibit strong diurnality and seasonality. Humidity variable selection must be dictated by the underlying research question. Despite being the most commonly used humidity variable, relative humidity should be used sparingly and avoided in cases when the proximity to saturation is not medically relevant. Care must be taken in averaging certain humidity variables daily or seasonally to avoid statistical biasing associated with variables that are inherently diurnal through their relationship to temperature.

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Crossref · 10.1016/j.envres.2015.10.014

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  • Higher RH in the morning than in the afternoon is a result of the lower air temperature during the morning, which in turn decreases the ability of the air to hold water compared to later in the day.

    “Higher RH in the morning than in the afternoon is a result of the lower air temperature during the morning, which in turn decreases the ability of the air to hold water compared to later in the day (Davis et al., 2016).”

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Authors
Davis, R. E., McGregor, G. R., & Enfield, K. B.
Affiliations
  • University of Virginia (US)
  • Durham University (GB)
  • University of Virginia Health System (US)
Corresponding author
Davis, Robert E.
Venue
Environmental Research
Publisher
Elsevier BV
Published
2016-01
Volume
144
Issue
Pt A
Pages
106-116
ISSN
0013-9351 (ISSN-L)
OpenAlex
W2220109943
Cited by
472
References
111
Citations by year
2026: 52 · 2025: 60 · 2024: 79 · 2023: 48 · 2022: 62 · 2021: 55 · 2020: 45 · 2019: 23 · 2018: 21 · 2017: 18 · 2016: 8
FWCI
1.49
Type
journal article
Language
en
Open access
Locations
  • Environmental Research (publishedVersion)
  • PubMed (publishedVersion)
  • Durham Research Online (Durham University) (acceptedVersion, cc-by-nc-nd)
  • Durham Research Online (Durham University) (submittedVersion, cc-by-nc-nd)
Funders
National University of Singapore
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Climate Change and Health Impacts
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
Keywords
air humidity, relative humidity, specific humidity, absolute humidity, dewpoint temperature, vapor pressure, mixing ratio, saturated vapor pressure, respiratory syncytial virus, weather and health, biometeorology, diurnal variation, seasonal variation
MeSH terms
Health, Humans, Humidity

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