An Introduction to Trends in Extreme Weather and Climate Events: Observations, Socioeconomic Impacts, Terrestrial Ecological Impacts, and Model Projections

Gerald A. Meehl
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Thomas Karl
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David R. Easterling
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Stanley Changnon
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Roger Pielke Jr.
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David Changnon
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Jenni Evans
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Pavel Ya. Groisman
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Thomas R. Knutson
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Kenneth E. Kunkel
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Linda O. Mearns
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Camille Parmesan
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Roger Pulwarty
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Terry Root
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Richard T. Sylves
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Peter Whetton
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Francis Zwiers
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Weather and climatic extremes can have serious and damaging effects on human society and infrastructure as well as on ecosystems and wildlife. Thus, they are usually the main focus of attention of the news media in reports on climate. There are some indications from observations concerning how climatic extremes may have changed in the past. Climate models show how they could change in the future either due to natural climate fluctuations or under conditions of greenhouse gas-induced warming. These observed and modeled changes relate directly to the understanding of socioeconomic and ecological impacts related to extremes.

*This is the first of five papers in the “Understanding Changes in Weather and Climate Extremes” series.

aNational Center for Atmospheric Research, Boulder, Colorado.

bNational Climatic Data Center, Asheville, North Carolina.

cIllinois State Water Survey, Champaign, Illinois.

dNorthern Illinois University, De Kalb, Illinois.

eThe Pennsylvania State University, University Park, Pennsylvania.

fGeophysical Fluid Dynamics Laboratory, Princeton, New Jersey.

gUniversity of Texas at Austin, Austin, Texas, and University of California, Santa Barbara, Santa Barbara, California.

hUniversity of Colorado, Boulder, Colorado.

iUniversity of Michigan, Ann Arbor, Michigan.

jUniversity of Delaware, Newark, Delaware.

kCSIRO, Aspendale, Victoria, Australia.

lCCCMA, Victoria, British Columbia, Canada.

Corresponding author address: Dr. Gerald A. Meehl, Climate and Global Dynamics Division, NCAR, P.O. Box 3000, Boulder, CO 80307-3000. E-mail: meehl@ncar.ucar.edu

Weather and climatic extremes can have serious and damaging effects on human society and infrastructure as well as on ecosystems and wildlife. Thus, they are usually the main focus of attention of the news media in reports on climate. There are some indications from observations concerning how climatic extremes may have changed in the past. Climate models show how they could change in the future either due to natural climate fluctuations or under conditions of greenhouse gas-induced warming. These observed and modeled changes relate directly to the understanding of socioeconomic and ecological impacts related to extremes.

*This is the first of five papers in the “Understanding Changes in Weather and Climate Extremes” series.

aNational Center for Atmospheric Research, Boulder, Colorado.

bNational Climatic Data Center, Asheville, North Carolina.

cIllinois State Water Survey, Champaign, Illinois.

dNorthern Illinois University, De Kalb, Illinois.

eThe Pennsylvania State University, University Park, Pennsylvania.

fGeophysical Fluid Dynamics Laboratory, Princeton, New Jersey.

gUniversity of Texas at Austin, Austin, Texas, and University of California, Santa Barbara, Santa Barbara, California.

hUniversity of Colorado, Boulder, Colorado.

iUniversity of Michigan, Ann Arbor, Michigan.

jUniversity of Delaware, Newark, Delaware.

kCSIRO, Aspendale, Victoria, Australia.

lCCCMA, Victoria, British Columbia, Canada.

Corresponding author address: Dr. Gerald A. Meehl, Climate and Global Dynamics Division, NCAR, P.O. Box 3000, Boulder, CO 80307-3000. E-mail: meehl@ncar.ucar.edu
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