Posted by admin | Posted in Solar Power | Posted on 02-01-2008
Tags: astronomy, climate, how is the solar activity cycle related to the sunspot cycle, science, solar, solar activity cycle 24, solar activity cycles, sun
Why is arctic ice cover declining at the same time as high latitude solar insolation is declining? ?
The mean annual solar insolation at 80 N is declining by 0.05% per century due to the Milankovitch cycle.
Borisenkov, YE. P., Tsvetkov, A. V. and Eddy, J.A., Combined Effects of Earth Orbit Perturbations and Solar Activity on Terrestrial Insolation. Part I: Sample Days and Annual Mean Values. (1985) J. Atmospheric Sciences 42(9) 933-940.
http://ams.allenpress.com/archive/1520-0469/42/9/pdf/i1520-0469-42-9-933.pdf
The sea ice extent:
http://www.nsidc.org/data/seaice_index/n_plot.html
mbs1960: The insolation in the N and S hemispheres is different (the S hemisphere receives more) because the earth’s orbit is elliptical. Please provide a peer reviewed source for your claim of equivalence. One year is weather. The long term trend in the N is -4.5 +- 1.2% and in the S 0.4 +- 0.8 %. Explain the difference using physics and chemistry only.
d/dx, My UN-SWAG is that the measured solar activity is unrelated to the warming trend revealed by the diminished arctic ice cover, but I don’t claim to know since I am not a climatologist. What is your take on it?
mbs, I think you are looking at only part of the picture in the antarctic. See:
http://www.nsidc.org/arcticseaicenews/faq.html#antarctic
Scientists predict Big Solar Cycle