BIOC58H3 Chapter 5: Chap 5 and 7.docx

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mauvecat225

15 May 2012

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1649 (renaissance) is an important year, middle of little ice age, before this year all climate info was from proxies. England temperature records (cet) is first climate record. Nothing warmer than 1730s, and nothing cooler than 1690s. Glacials last 100k years, interglacials last 10k years. Waalian interglacial 425k years ago was most similar to the current holocene interglacial. Without global warming there should be overall cooling of the world for the next 25k years until the next glacial happens. Because of humans adding so much co2, our interglacial may be extended up to 100k years. Holocene represents period of warmth and stable climate, past 10k years though not static climate. Recently there was a second medieval warming event, and little ice age cooling event. Shows that lots of factors effect climate either natural or anthropogenic, not just greenhouse gases.

Related Questions

Which of the following statements is not a characteristic or effect of climate change?
Select one:

a. Global warming is the only type of climate change.
b. Climate change is beginning to re-draw the map of biomes around the world.
c. Climate change is occurring because the biotic and abiotic parts of ecosystems are not static.
d. Climate change is any substantial change in climate that lasts for an extended period of time.
e. Climate change will likely exceed the ability of many species to adapt and could cause many species to go extinct.

lemonhornet814

As you may know, the causes of global warming and climate change are debated in scientific circles. Some say greenhouse gases are to blame; others say the earth regularly experiences cycles of warming and cooling. Some point to our recent record cold temperatures and snowfall, and ask how can we blame global warming? Still other scientists are predicting that our present global warming trend will result in a new Ice Age.

Try to locate the physics principle(s) which provide a logical progression from warmer temperatures to an Ice Age. You don't have to believe the theory, just merely repeat it here and discuss its merits or deniability.

erinferret495

Climate change is a real and worsening phenomenon. Many people think that the effects of climate change are restricted to the increase in the Earthâs average temperature. As we will see this semester, this is certainly not the case. Even where global warming is the main driving force, it may not be the sole or even primary factor determining whether a species will survive or become extinct. For this weekâs forum, read the blog Falling to the competition: how climate change forces species to collide and answer the questions that follow.

1. How do plants generally respond to global warming?

2. Elevated temperature associated with climate change is not the sole factor affecting plant survival. What other factor(s) may be involved?

3. If a plant fails to move to a higher elevation to adapt to warming, its chances for survival are much less than that of a plant that does. How do you explain this finding?

4. In what important way does the design of this study differ from what plants should expect to encounter in a real world scenario? What does this imply will be the strongest detriment to a plantâs survival in a warming world?

limejellyfish620

BIOC58H3 Chapter 5: Chap 5 and 7.docx

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