Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 118, Issue 7, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2013284118
Keywords
climate change; respiratory health; detection; attribution; Earth system model
Categories
Funding
- David and Lucille Packard Foundation
- National Science Foundation [1714972, 1802880, 2003205, DBI-1711243]
- US Department of Agriculture National Institute of Food and Agriculture, Agricultural, and Food Research Initiative Competitive Programme, Ecosystem Services and Agro-ecosystem Management [2018-67019-27850]
- Direct For Biological Sciences [2003205] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Division Of Environmental Biology [1802880] Funding Source: National Science Foundation
- Division Of Environmental Biology [2003205] Funding Source: National Science Foundation
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Research indicates that anthropogenic climate change may lead to increased pollen concentrations and extended seasons, having detrimental impact on respiratory health.
Airborne pollen has major respiratory health impacts and anthropogenic climate change may increase pollen concentrations and extend pollen seasons. While greenhouse and field studies indicate that pollen concentrations are correlated with temperature, a formal detection and attribution of the role of anthropogenic climate change in continental pollen seasons is urgently needed. Here, we use long-term pollen data from 60 North American stations from 1990 to 2018, spanning 821 site-years of data, and Earth system model simulations to quantify the role of human-caused climate change in continental patterns in pollen concentrations. We find widespread advances and lengthening of pollen seasons (+20 d) and increases in pollen concentrations (+21%) across North America, which are strongly coupled to observed warming. Human forcing of the climate system contributed similar to 50% (interquartile range: 19-84%) of the trend in pollen seasons and similar to 8% (4-14%) of the trend in pollen concentrations. Our results reveal that anthropogenic climate change has already exacerbated pollen seasons in the past three decades with attendant deleterious effects on respiratory health.
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