---
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caption: 'Recent variations of the Power Dissipation Index (PDI) in the North Atlantic and eastern North Pacific Oceans. PDI is an aggregate of storm intensity, frequency, and duration and provides a measure of total hurricane power over a hurricane season. There is a strong upward trend in Atlantic PDI, and a downward trend in the eastern North Pacific, both of which are well-supported by the reanalysis. Separate analyses (not shown) indicate a significant increase in the strength and in the number of the strongest hurricanes (Category 4 and 5) in the North Atlantic over this same time period. The PDI is calculated from historical data (IBTrACS<tbib>73711f67-22e4-469a-af2a-6a426e41f472</tbib>) and from reanalyses using satellite data (UW/NCDC &amp; ADT-HURSAT<tbib>6d2920f6-f06d-41fd-83e7-1fd61c40ae49</tbib><sup>,</sup><tbib>f748a8e5-7925-4fb4-a64c-57dd77279670</tbib>). IBTrACS is the International Best Track Archive for Climate Stewardship, UW/NCDC is the University of Wisconsin/NOAA National Climatic Data Center satellite-derived hurricane intensity dataset, and ADT-HURSAT is the Advanced Dvorak Technique–Hurricane Satellite dataset (Figure source: adapted from Kossin et al. 2007<tbib>6d2920f6-f06d-41fd-83e7-1fd61c40ae49</tbib>).'
chapter:
  description: ~
  display_name: 'Chapter 2: Our Changing Climate'
  doi: 10.7930/J0KW5CXT
  identifier: our-changing-climate
  number: 2
  report_identifier: nca3
  sort_key: 20
  title: Our Changing Climate
  url: http://nca2014.globalchange.gov/report/our-changing-climate/introduction
chapter_identifier: our-changing-climate
cited_by: []
contributors: []
create_dt: 2012-11-07T11:14:00
description: 'Recent variations of the Power Dissipation Index (PDI) in the North Atlantic and eastern North Pacific Oceans. PDI is an aggregate of storm intensity, frequency, and duration and provides a measure of total hurricane power over a hurricane season. There is a strong upward trend in Atlantic PDI, and a downward trend in the eastern North Pacific, both of which are well-supported by the reanalysis. Separate analyses (not shown) indicate a significant increase in the strength and in the number of the strongest hurricanes (Category 4 and 5) in the North Atlantic over this same time period. The PDI is calculated from historical data (IBTrACS<tbib>73711f67-22e4-469a-af2a-6a426e41f472</tbib>) and from reanalyses using satellite data (UW/NCDC &amp; ADT-HURSAT<tbib>6d2920f6-f06d-41fd-83e7-1fd61c40ae49</tbib><sup>,</sup><tbib>f748a8e5-7925-4fb4-a64c-57dd77279670</tbib>). IBTrACS is the International Best Track Archive for Climate Stewardship, UW/NCDC is the University of Wisconsin/NOAA National Climatic Data Center satellite-derived hurricane intensity dataset, and ADT-HURSAT is the Advanced Dvorak Technique–Hurricane Satellite dataset (Figure source: adapted from Kossin et al. 2007<tbib>6d2920f6-f06d-41fd-83e7-1fd61c40ae49</tbib>).'
display_name: '2.23: Observed Trends in Hurricane Power Dissipation'
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href: http://52.38.26.42:8080/report/nca3/chapter/our-changing-climate/figure/observed-trends-in-hurricane-power-dissipation.yaml
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references:
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report:
  display_name: 'Climate Change Impacts in the United States: The Third National Climate Assessment'
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title: Observed Trends in Hurricane Power Dissipation
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url: http://nca2014.globalchange.gov/report/our-changing-climate/changes-hurricanes/graphics/observed-trends-hurricane-power-dissipation
usage_limits: Free to use with credit to the original figure source.