Q2.19. Climatologists have sought evidence of climate change in many components
ID: 278303 • Letter: Q
Question
Q2.19. Climatologists have sought evidence of climate change in many components of the climate system. Which of the following statements has the least empirical support? Surface temperatures have increased since 1850. Arctic sea ice, glaciers, and ice sheets have declined over the past 50 years Globally, total precipitation has increased dramatically since 1850. Global mean sea level has risen significantly since 1880. Q2.20. Which of the following statements about proxy reconstructions is false? Proxy reconstructions focus on how temperatures varied before the advent of thermometers. Tree-ring reconstructions assume trees grow faster when it is warm and wet Proxy reconstructions suggest today's climate is about the same as it was in the past. There is reasonable agreement among reconstructions made from different proxies.Explanation / Answer
Answer 2.19
Globally total precipitation has increased dramatically since 1850.
It has Decreased from then and now, because of the increased population forest cover has been reduced, that has Decreased the precipitation rate.
Answer 2.20. Proxy reconstruction suggests that today's climate is about the same as it was in the past.
This is not true, because there are huge change from then and now.
Answer 2.21. Thermal expansion of the sea water
Because with increased temperature the water expands and temperature has increased dramatically in the past years.
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