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Variations in Earth's Orbit Even if solar output did not change, changes in Earth's orbital characteristics could alter the seasonal and latitudinal receipt of solar radiation. Yugoslavian astrono- mer Milutin Milankovitch calculated variations in three components of Earth's orbit-eccentricity, obliquity (tilt), and precession-that could explain periods of glacial ad- vance and retreat. 11. How would a decrease in the tilt of Earth's axis change the intensity of the seasons in the mid-latitudes? 12. How would the intensity of the seasons change in the northern mid-latitudes if the perihelion changed from January 3 to some time near the Northern Hemisphere's summer solstice?

Variations in Earth's Orbit Even if solar output did not change, changes in Earth's orbital characteristics could alter the seasonal and latitudinal receipt of solar radiation. Yugoslavian astrono- mer Milutin Milankovitch calculated variations in three components of Earth's orbit-eccentricity, obliquity (tilt), and precession-that could explain periods of glacial ad- vance and retreat. 11. How would a decrease in the tilt of Earth's axis change the intensity of the seasons in the mid-latitudes? 12. How would the intensity of the seasons change in the northern mid-latitudes if the perihelion changed from January 3 to some time near the Northern Hemisphere's summer solstice?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Variations in Earth's Orbit 14. What is the global average temperature difference be- tween 25,000 years ago and present? Even if solar output did not change, changes in Earth's orbital characteristics could alter the seasonal and latitudinal receipt of solar radiation. Yugoslavian astrono- mer Milutin Milankovitch calculated variations in three components of Earth's orbit-eccentricity, obliquity (tilt), and precession-that could explain periods of glacial ad- The global temperatures shown in Table 16-1 are not uniform across the globe. Figure 16-8 shows simulated av- vance and retreat. erage monthly temperatures at 55°N latitude. 11. How would a decrease in the tilt of Earth's axis change 15. During which season do you find the greatest dif- ference between the present temperature and that the intensity of the seasons in the mid-latitudes? 25,000 years ago at 55° N latitude? How might the conditions during this season have favored glacial ice there 25,000 years ago? 12. How would the intensity of the seasons change in the northern mid-latitudes if the perihelion changed from January 3 to some time near the Northern Hemisphere's summer solstice? 15 An energy balance model allows comparison of Earth's orbital eccentricity, precession, and tilt between current conditions and those 25,000 years ago (Table 16-1). 10 13. Given the tilt 25,000 years ago, what differences in seasonality would you expect from the present? -5- обе .......................... verage monthly temperature (°C) Present 20
Transcribed Image Text:Variations in Earth's Orbit 14. What is the global average temperature difference be- tween 25,000 years ago and present? Even if solar output did not change, changes in Earth's orbital characteristics could alter the seasonal and latitudinal receipt of solar radiation. Yugoslavian astrono- mer Milutin Milankovitch calculated variations in three components of Earth's orbit-eccentricity, obliquity (tilt), and precession-that could explain periods of glacial ad- The global temperatures shown in Table 16-1 are not uniform across the globe. Figure 16-8 shows simulated av- vance and retreat. erage monthly temperatures at 55°N latitude. 11. How would a decrease in the tilt of Earth's axis change 15. During which season do you find the greatest dif- ference between the present temperature and that the intensity of the seasons in the mid-latitudes? 25,000 years ago at 55° N latitude? How might the conditions during this season have favored glacial ice there 25,000 years ago? 12. How would the intensity of the seasons change in the northern mid-latitudes if the perihelion changed from January 3 to some time near the Northern Hemisphere's summer solstice? 15 An energy balance model allows comparison of Earth's orbital eccentricity, precession, and tilt between current conditions and those 25,000 years ago (Table 16-1). 10 13. Given the tilt 25,000 years ago, what differences in seasonality would you expect from the present? -5- обе .......................... verage monthly temperature (°C) Present 20
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