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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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Climate changes affecting global iodine status.

Peter Pa Smyth1, Colin D O'Dowd2

  • 1UCD School of Medicine, University College Dublin, Dublin, Ireland.

European Thyroid Journal
|March 12, 2024
PubMed
Summary
This summary is machine-generated.

Global warming may unexpectedly boost global iodine supply. Ozone reacting with ocean iodide releases gaseous iodine (I2), potentially improving thyroid health and human iodine intake.

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atmosphericclimate changeglobal warmingiodinethyroid

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Area of Science:

  • Environmental Science
  • Biogeochemistry
  • Human Health

Background:

  • Global warming causes severe climate changes, including rising sea levels and extreme temperatures.
  • An under-recognized consequence of climate change involves atmospheric chemistry and marine iodide reactions.
  • Ozone (O3) pollution, from natural and anthropogenic sources, interacts with iodide (I-) in marine environments.

Purpose of the Study:

  • To investigate the potential of climate change-driven reactions to increase global iodine supply.
  • To examine the role of ozone-iodide interactions in coastal waters as a source of gaseous iodine (I2).
  • To assess the implications of increased iodine bioavailability for human thyroidal health.

Main Methods:

  • Analysis of the chemical reaction between ozone (O3) and iodide (I-) in marine environments.
  • Evaluation of gaseous iodine (I2) production from this reaction.
  • Assessment of the potential contribution of this I2 to human iodine intake, particularly in seaweed-rich coastal areas.

Main Results:

  • The reaction of ozone with iodide in oceans and seaweeds produces gaseous iodine (I2).
  • This process acts as a negative feedback mechanism, reducing lower atmospheric ozone pollution.
  • The generated I2 represents a potential new source for increasing global iodine status.

Conclusions:

  • Climate change-induced ozone-iodide reactions may significantly enhance global iodine supply.
  • Increased bioavailability of iodine from this source could improve thyroidal health worldwide.
  • Further research and attention from the health community are needed to address this emerging issue.