edu.ucar.opensky::technotes:280 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T17:24:22.429802 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7gx49zk An Atlas of Variations in the Solar Constant Caused by Sunspot Blocking and Facular Emissions From 1874 to 1981 1982-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7gx49zk https://doi.org/10.5065/D6TT4NWP National Center for Atmospheric Research author University Corporation For Atmospheric Research (UCAR):National Center for Atmospheric Research (NCAR):High Altitude Observatory (HAO) author UCAR/NCAR - Library publisher The purpose of this atlas is to present such a reconstruction for a period of slightly more than a century, for the use of atmospheric and solar physicists for whom a reconstruction may be of value. As stressed in later sections of this report, the atlas reconstructs only the short-term variations in S that have now been demonstrated to follow from day-to-day changes in surface solar activity. Moreover the reconstruction is based on the physically-improbable approximation of an infinite storage time within the sun: i.e., that the solar radiant flux blocked by sunspots is never released. As we point out in Section 3 and Appendix 3, however, the best observations now available fit this assumption rather well, suggesting that the storage time within the sun must be of the time scale of months or more. In time, after longer and better measurements of S from space have been accumulated the real storage time for blocked solar flux may be better defined. It is also possible that other, longer-term drifts or modulations in S., due perhaps to other solar mechanisms, will be established. In the interim, however, an atlas of the sort given here represents the best approximations that can now be given. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Sunspots Solar irradiance Sunspot activity theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation