Affordable Solar & Wind

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

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Insolation data manual: Long-term monthly averages of solar radiation, temperature, degree-days and Global KT for 248 National Weather Service stations ...

Insolation models, data and algorithms, annual report FY78 (SERI/TR) ...

Direct normal solar radiation data manual: Long-term, monthly mean, daily totals for 235 National Weather Service stations : addendum to the Insolation data manual ...

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Solar Furnace $87.62 High Quality Content by WIKIPEDIA articles A solar furnace is a structure used to harness the rays of the sun in order to produce high temperatures, usually for industry. This is achieved using a curved mirror (or an array of mirrors) that acts as a parabolic reflector, concentrating light (Insolation) onto a focal point. The temperature at the focal point may reach 3,500 C (6,330 F), and this heat can be used to generate electricity, melt steel, make hydrogen fuel or nanomaterials. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2010/05/19 Language: English Dimensions: 5.98 x 9.01 x 0.30 inches

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A Survey of Passive Solar Buildings $35.09 This publication of passive solar projects built in the United States has been prepared to document the state of the art in passive solar design. Passive solar heating and cooling can provide a major percentage of the buildings energy requirement, while at the same time representing a heightened level of involvement for the architect in the design stages of the building. The full potential of this passive conditioning depends on a sensitive awareness of the relationship between climate, comfort, and the thermal characteristics of buildings and building materials. Passive solar systems are often misunderstood and vaguely defined. Many of the approaches to passive solar heating and cooling are at rudimentary stages, with little performance data and evaluation, few modeling techniques, and minimal published information. Yet for the building designer and the occupant, these concepts have major implications in the design and use of buildings. The purpose of this publication is to offer a working definition and a basic understanding of a number of existing applications of passive solar designs. Methods of passive solar design are not presented in this publication; nor are rules of thumb or passive solar assemblies and components. These subjects will be addressed in later publications. A reference bibliography has been included to assist the reader who desires more information and to stimulate additional individual research and testing. Passive design techniques can be integrated in an additive fashion in more typical buildings but this challenge for now, is left to the reader. Author: Dept of Housing and Urban Development/ US Department of Energy/ AIA Research Corporation Binding Type: Paperback Number of Pages: 184 Publication Date: 2005/01/01 Language: English Dimensions: 11.00 x 8.25 x 0.39 inches

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