Evidence map›Paper›PMID 33877430›Full record

SynthesisInternational journal of biometeorology2021

A systematic review of the effects of temperature and precipitation on pollen concentrations and season timing, and implications for human health.

P J Schramm, C L Brown, S Saha, K C Conlon, A P Manangan, J E Bell, J J Hess

Open access · greenAbstract readSystematic Review
In one paragraph

Synthesis in International journal of biometeorology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
7.2field-weighted citation impact, top 2% of its field
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

30 citing papers in PubMed, 100 citations in OpenAlex.

  1. Article
  2. Review
  3. Aeroallergens in Atopic Dermatitis and Chronic Urticaria.Current allergy and asthma reports · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. A 15-year survey of pollen aeroallergens in North Texas.The journal of allergy and clinical immunology. Global · 2025
    Article
  14. A Flexible Framework for Urgent Public Health Climate Action.American journal of public health · 2025
    Article
  15. Month of birth and outdoor temperature after birth predict childhood atopic diseases in Finland.Pediatric allergy and immunology : official publication of the European Society of Pediatric Allergy and Immunology · 2025
    Article
  16. Article
  17. Climate Change, Exposome Change, and Allergy: A Review.Immunology and allergy clinics of North America · 2024
    Review
  18. Article
  19. Air pollution and rhinitis.Frontiers in allergy · 2024
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 1 country.

P J SchrammClimate and Health Program, Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, S106-6, Atlanta, GA, 30341, USA. pschramm@cdc.gov.ORCID http://orcid.org/0000-0003-0299-6211
C L BrownClimate and Health Program, Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, S106-6, Atlanta, GA, 30341, USA.
S SahaClimate and Health Program, Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, S106-6, Atlanta, GA, 30341, USA.
K C ConlonDepartment of Public Health Sciences, School of Medicine, University of California Davis, Davis, CA, USA.
A P MananganClimate and Health Program, Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, S106-6, Atlanta, GA, 30341, USA.
J E BellDepartment of Environmental, Agricultural, and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA.
J J HessDepartments of Emergency Medicine, Environmental and Occupational Health Sciences, and Global Health, and the Center for Health and the Global Environment, Schools of Medicine and Public Health, University of Washington, Seattle, WA, USA.
Centers for Disease Control and Prevention · USUniversity of California, Davis · USUniversity of Nebraska Medical Center · USUniversity of Washington · US

Funding

Intramural CDC HHS CC999999
6 · The paper itself

Abstract

Climate and weather directly impact plant phenology, affecting airborne pollen. The objective of this systematic review is to examine the impacts of meteorological variables on airborne pollen concentrations and pollen season timing. Using PRISMA methodology, we reviewed literature that assessed whether there was a relationship between local temperature and precipitation and measured airborne pollen. The search strategy included terms related to pollen, trends or measurements, and season timing. For inclusion, studies must have conducted a correlation analysis of at least 5 years of airborne pollen data to local meteorological data and report quantitative results. Data from peer-reviewed articles were extracted on the correlations between seven pollen indicators (main pollen season start date, end date, peak date, and length, annual pollen integral, average daily pollen concentration, and peak pollen concentration), and two meteorological variables (temperature and precipitation). Ninety-three articles were included in the analysis out of 9,679 articles screened. Overall, warmer temperatures correlated with earlier and longer pollen seasons and higher pollen concentrations. Precipitation had varying effects on pollen concentration and pollen season timing indicators. Increased precipitation may have a short-term effect causing low pollen concentrations potentially due to "wash out" effect. Long-term effects of precipitation varied for trees and weeds and had a positive correlation with grass pollen levels. With increases in temperature due to climate change, pollen seasons for some taxa in some regions may start earlier, last longer, and be more intense, which may be associated with adverse health impacts, as pollen exposure has well-known health effects in sensitized individuals.

Indexed as

PollenWeatherAllergensClimate ChangeHumansSeasonsTemperatureAllergensAeroallergensClimateMeteorologyPollenPrecipitationTemperature

Identifiers

PMID33877430
PMCPMC9016682
OpenAlexW3156853581

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.