GEOG 108 Class 21 Global Climate & Change

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30 Terms

1

What is the primary definition of climate?

Climate is weather over time.

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2

What is climatology?

The study of climate.

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3

What determines the location of ecosystems on land?

The location of climatic regions.

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4

What are climatic regions characterized by?

Areas with similar weather statistics.

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5

What type of climates does the equatorial region typically have?

Tropical rain forest climates.

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6

What is the main characteristic of tropical monsoon climates?

6 to 12 months of rainy weather.

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7

What type of climate is characterized by dry summers?

Mediterranean climate.

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8

What are arid deserts primarily known for?

Very low precipitation levels.

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9

Which climate type has hot summers and cold winters?

Humid continental climate.

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10

What proxies are used for paleoclimate data?

Ice cores, tree rings, fossil leaves, and planktonic foraminifera.

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11

What atmospheric change is associated with the Anthropocene?

Increase of greenhouse gases due to human activity.

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12

What was the warmest year recorded globally until now?

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13

What has been the average temperature increase per decade since 1850?

0.06°C.

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14

From when does the current increase in atmospheric CO2 begin to show significant change?

Around 1850 AD.

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15

What are the levels of atmospheric CO2 in 2024?

424.19 ppm.

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16

What is the estimated increase in CO2 due to anthropogenic activities over the last 200 years?

40%.

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17

What greenhouse gases are linked to warming?

CO2, CH4, and N2O.

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18

What is the current level of atmospheric methane (CH4) compared to pre-industrial levels?

1700 ppb (150% above pre-industrial levels).

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19

What are the primary natural sources of atmospheric methane?

Wetlands and oceans.

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20

What has contributed to the sharp rise in global temperatures during the 20th century?

Increase in atmospheric CO2.

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21

What isotopes are stable forms of carbon?

12C and 13C.

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22

What was the minimum CO2 value during glacial periods?

Near 190 ppm.

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23

What proxies indicate past climate temperatures?

Leaf outlines and fossil assemblages.

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24

What is one of the main anthropogenic sources of carbon dioxide?

Fossil fuel combustion.

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25

Which gas concentrations rose sharply in the last few decades?

Methane (CH4).

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26

What effect do greenhouse gases have on Earth's temperature?

They trap heat and contribute to global warming.

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27

What is the primary cause of the increase in nitrous oxide (N2O) levels?

Agricultural activities.

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28

What does isotopic analysis of carbon help determine?

The sources and cycles of carbon in the atmosphere.

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29

What does the term 'Icehouse' refer to in climate history?

Periods with significant ice cover and low greenhouse gas levels.

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30

What has influenced global temperature increases since industrialization?

Human activities such as emissions of greenhouse gases.

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