It is widely accepted that there is a relationship between ice volume and the solar insolation in summer in the northern hemisphere. The Earth's glacial cycles are driven by cyclic changes in the Earth's orbital elements. This conclusion is based on the strong coherence between the approx. 20000 and 40000 year spectral components of ice volume and insolation (Milankovitch-curve) records. These frequencies are determined by the variation of the obliquity of the Earth's axis and by its position relative to the Earth's orbit around the sun. The degree of sum­ mer insolation on the Earth's northern Hemisphere is believed to be relevant to climate because the North Atlantic is where cold saline water is being formed. Present day deep water circulation is driven by salt build-up in due to net evapora­ tion. In contrast, in the North Pacific precipitation exceeds evaporation. Thus, deep water transfers a surplus of salt from the N. Atlantic to the North Pacific. This surface water delivers also oxygen to the deep ocean. In contrast, upwelling deep water transfers nutrients from the deep ocean to the surface water. Today the time of renewal of deep water is in the order of 1000 years.

Product Description: Sourdough: The Gold Standard of Bread   More and more home bakers are replacing mass-produced breads and commercial yeasts in favor of artisan breads made with wild cultures and natural fermentation. Whether you want to capture your own local yeasts, take advantage of established cultures like San Francisco Sourdough, or simply bake healthier, more natural loaves, you’ll find no better guides than renowned sourdough authorities Ed and Jean Wood...read more

Product Description: We have to thank the ancient Egyptians for the sourdough bread we know today.Wild Sourdough is a hands-on and highly practical guide to sourdough bread-making at home.With more than 45 easy-to-follow sourdough recipes, written specifically for home-bakers, Wild Sourdough invites you to go back to basics, using flour, water and salt then add in feta, walnuts, dried fruit or figs to create your own unique loaf...read more

Traces the career of the country and pop singer from his days on the 'Grand Ole Opry' through his continued presence in the country music scene

Product Description: It is widely accepted that there is a relationship between ice volume and the solar insolation in summer in the northern hemisphere. The Earth's glacial cycles are driven by cyclic changes in the Earth's orbital elements. This conclusion is based on the strong coherence between the approx...read more

Traces the career of the country and pop singer from his days on the 'Grand Ole Opry' through his continued presence in the country music scene