Discussion
Consider the following statements about the orbital theory of ice ages.
1. Orbital periods appear in the marine isotope record.
2. High latitude summer insolation is the key quantity.
3. The orbital forcing is large enough to explain the ice ages by itself.
Answer: A
The first two are correct. The third is not accepted, since feedbacks involving ice albedo and carbon dioxide are needed to amplify the modest orbital signal. Insolation alone is too small a lever. Feedbacks do most of the amplification.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development