Earth Portrait of a Planet Chapter 23 Norton Media Library

Fig (c) DigitalVision/PictureQuest

Fig W. W. Norton

Fig W. W. Norton

Fig a NASA

Fig b NASA

Fig c NASA

Fig a, b W. W. Norton

Fig c W. W. Norton

Fig d W. W. Norton

Fig e W. W. Norton

Fig W. W. Norton

Fig W. W. Norton

Fig a W. W. Norton. After Van Andel, 1994

Fig b, c W. W. Norton. After Sloss, 1962

Fig d W. W. Norton. After Boggs, 1995

Fig e W. W. Norton. After Van Andel, 1994

pp original artwork by Gary Hincks

Fig W. W. Norton

Fig c W. W. Norton

Fig a W. W. Norton

Fig b W. W. Norton

Fig a W. W. Norton. After Johnson, 1972

Fig b, c W. W. Norton. After Van Andel, 1994

Snowball Earth The Snowball Earth Hypothesis proposes that during an ice age 900 mya, the entire land and oceanic surface the Earth was covered by ice. This animation shows four proposed stages to the formation and destruction of Snowball Earth conditions: · During "normal" climate periods there are ice caps at the poles; sea level rises and falls. · During "metastable" climate times ice sheets expand and contract dramatically. · "Runaway snowball" conditions develop and ice nearly envelopes the Earth; atmospheric carbon dioxide is not absorbed by the frozen ocean. · The rising concentration of unabsorbed carbon dioxide gas leads to a "runaway greenhouse effect"; Earth warms and the ice shell rapidly vanishes. [by Declan DePaor] Play Animation Windows version >> Play Animation Macintosh version >>

Fig a W. W. Norton. After Kump et al., 1999

Fig b W. W. Norton. After Kump et al., 1999

Fig c W. W. Norton

Fig a W. W. Norton. After McKenzie, 1998

Fig a Courtesy of SOHO/MDI consortium. SOHO is a project of international cooperation between ESA and NASA

Fig b W. W. Norton. Adapted from Chaisson and McMillan, 1998

Fig a,b W. W. Norton. After Kump et al., 1999

Fig b W. W. Norton

Fig W. W. Norton. After Turco, 1997

Fig a Courtesy of GSFC/NASA

Fig b W. W. Norton. After Turco, 1997

Fig a W. W. Norton. Adapted from McKenzie, 1998

Fig b W. W. Norton. Adapted from McKenzie, 1998

Fig c W. W. Norton. Adapted from McKenzie, 1998

Fig a W. W. Norton. Adapted from McKenzie, 1998

Fig b W. W. Norton. Adapted from Kattenberg et al., 1996

Fig a W. W. Norton. Adapted from McKenzie, 1998.

Fig b W. W. Norton. Adapted from McKenzie, 1998.

Fig a W. W. Norton. Adapted from McKenzie, 1998.

Fig b W. W. Norton. Adapted from McKenzie, 1998.

Fig W. W. Norton

W. W. Norton & Company Independent and Employee-Owned This concludes the Norton Media Library Slide Set for Chapter 23. EARTH: Portrait of a Planet by Stephen Marshak.