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Related Concept Videos

Global Climate Change01:50

Global Climate Change

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.
Microbes and Climate Change01:27

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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What is Weather?

Overview
Oxymercuration-Reduction of Alkenes02:36

Oxymercuration-Reduction of Alkenes

Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.
The Carbon Cycle01:14

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.

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Using Generative Art to Convey Past and Future Climate Transitions
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Published on: March 31, 2023

How does climate change influence Arctic mercury?

Gary A Stern1, Robie W Macdonald, Peter M Outridge

  • 1Fisheries and Oceans Canada, Freshwater Institute, Winnipeg, Manitoba, Canada. Gary.Stern@dfo-mpo.gc.ca

The Science of the Total Environment
|November 23, 2011
PubMed
Summary
This summary is machine-generated.

Climate change significantly impacts Arctic mercury cycling through altered sea-ice, food webs, and emissions from thawing permafrost. Understanding these complex interactions is crucial for predicting mercury

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Area of Science:

  • Environmental Science
  • Arctic Studies
  • Climate Change Research

Background:

  • Climate change is altering Arctic ecosystems, affecting mercury transport, speciation, and cycling.
  • Sea-ice loss and warming influence primary productivity, food webs, and mercury methylation/demethylation rates.
  • Changes in animal behavior due to sea-ice regimes impact dietary mercury exposure.

Purpose of the Study:

  • To review recent literature on climate variability's ramifications on mercury cycling, processes, and exposure in the Arctic.
  • To address nine key questions regarding climate change impacts on Arctic mercury dynamics.
  • To synthesize current knowledge and provide conclusions and recommendations.

Main Methods:

  • Literature review applying recent studies to nine specific questions.
  • Analysis of climate change impacts on physical Arctic characteristics and processes.
  • Assessment of mercury cycling, methylation/demethylation, and food web dynamics under climate change scenarios.

Main Results:

  • Climate change affects mercury transport across the ocean-sea-ice-atmosphere interface (bottom-up) and dietary exposure (top-down).
  • Sea-ice decline influences mercury deposition and emission, air-surface fluxes, and riverine mercury transport.
  • Thawing permafrost and melting glaciers are potential sources of mercury emissions.

Conclusions:

  • Climate change profoundly alters mercury cycling and exposure pathways in Arctic ecosystems.
  • Further research is needed to fully understand and predict mercury dynamics under future climate scenarios.
  • Recommendations are provided for future research and management strategies regarding Arctic mercury.