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Integrated Summer Insolation Calculations
Entry ID: NOAA_NCDC_PALEO_2006-079

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Summary
Abstract: Long-term variations in Northern Hemisphere summer insolation are generally
thought to control glaciation. But the intensity of summer insolation is
primarily controlled by 20,000-year cycles in the precession of the equinoxes,
whereas early Pleistocene glacial cycles occur at 40,000-year intervals,
matching the period of changes in Earth's obliquity. The resolution of this
40,000-year problem is that glaciers are sensitive to insolation integrated
over the duration of the summer. The integrated summer insolation is primarily
controlled by obliquity and not precession because, by Kepler's second law,
the duration of the summer is inversely proportional to Earth's distance from
the Sun.
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Multimedia Sample
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Caption:  Seasonal variations in insolation at 65°N
Description:  Seasonal variations in insolation at 65°N, from:
http://www.ncdc.noaa.gov/paleo/pubs/huybers2006b/huybers2006b.html

 
Geographic Coverage
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Huybers, P. and Eisenman, I.
Dataset Title: Integrated Summer Insolation Calculations
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2006-079
Dataset Release Date: August 2006
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2006-079
Other Citation Details: NOAA/NCDC Paleoclimatology Program
Online Resource: http://www.ncdc.noaa.gov/paleo/pubs/huybers2006b/huybers2006b.html
Paleo Temporal Coverage
Paleo Start Date: 5 ma
Paleo Stop Date: 0 ma
Chrono Unit:
PHANEROZOIC  >  CENOZOIC  >  QUATERNARY  >  PLEISTOCENE
Location Keywords
Data Resolution
Latitude Resolution: 5 degrees
Longitude Resolution: 5 degrees
Horizontal Resolution Range: 500 km - < 1000 km or approximately 5 degrees - < 10 degrees
Science Keywords
ISO Topic Category
Project
Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
NOAA/NCDC
Data Center
World Data Center for Paleoclimatology, Boulder Supplemental Info
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA
Distribution
Distribution Media: online ftp
Distribution Format: text, matlab files
Fees: none
Personnel
PETER HUYBERS
Role: INVESTIGATOR
Contact Address:
Department of Earth and Planetary Sciences
Harvard University
City: Cambridge
Province or State: MA
Postal Code: 02138
Country: USA
Publications/References
Huybers, P. 2006. Early Pleistocene Glacial Cycles and the Integrated Summer
Insolation Forcing. Science, v313, p508-511, 10.1126/science.1125249, 28 July
2006.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2006-10-17
Last DIF Revision Date: 2017-08-23

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