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Questions and Answers
What is climate change?
What is climate change?
Climate change is the alteration of weather patterns in a place over a long time.
What does "weather" refer to?
What does "weather" refer to?
Weather refers to the atmospheric conditions, including temperature, humidity, precipitation, wind pressure, the appearance of typhoons, etc., in a place for a particular time.
What does the word "climate" refer to?
What does the word "climate" refer to?
Climate is the average weather of a place over a long time, let's say 30 years or more. Average weather or climate means the averages of precipitation, temperature, humidity, wind velocity, etc. Hence, the climate of a place is predictable.
What kind of data is used to determine climate change?
What kind of data is used to determine climate change?
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Modern climate data are collected by satellites from space.
Modern climate data are collected by satellites from space.
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Paleoclimate data only includes climate information from the past thousands of years.
Paleoclimate data only includes climate information from the past thousands of years.
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What are some examples of sources for paleoclimate data?
What are some examples of sources for paleoclimate data?
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What are ice sheets, and how many are there on Earth?
What are ice sheets, and how many are there on Earth?
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What methods are used to detect changes in ice sheet mass?
What methods are used to detect changes in ice sheet mass?
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What does the term "mass balance" refer to?
What does the term "mass balance" refer to?
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A negative mass balance indicates that melting and calving rates are occurring faster than snow deposition.
A negative mass balance indicates that melting and calving rates are occurring faster than snow deposition.
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Regarding the ice sheets in Antarctica and Greenland, what trend has been observed?
Regarding the ice sheets in Antarctica and Greenland, what trend has been observed?
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What is the rate of change in the ice sheet mass of Antarctica?
What is the rate of change in the ice sheet mass of Antarctica?
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What is the rate of change in the ice sheet mass of Greenland?
What is the rate of change in the ice sheet mass of Greenland?
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The minimum coverage of Arctic sea ice has been increasing over time.
The minimum coverage of Arctic sea ice has been increasing over time.
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What is the rate of decline for Arctic sea ice minimum?
What is the rate of decline for Arctic sea ice minimum?
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Why is the shrinking of Arctic sea ice a concern for polar bears?
Why is the shrinking of Arctic sea ice a concern for polar bears?
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What is the main reason for the need for paleoclimate data to be extended back to thousands or millions of years?
What is the main reason for the need for paleoclimate data to be extended back to thousands or millions of years?
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What techniques are used to gather information about the climate thousands of years ago?
What techniques are used to gather information about the climate thousands of years ago?
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What is loess?
What is loess?
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How do glaciers contribute to the formation of loess?
How do glaciers contribute to the formation of loess?
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Loess soils provide evidence that ice sheets once extended beyond Greenland.
Loess soils provide evidence that ice sheets once extended beyond Greenland.
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What is an ice core?
What is an ice core?
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How is the age of an ice core determined?
How is the age of an ice core determined?
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What is the significance of ice core chemistry?
What is the significance of ice core chemistry?
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The accumulation of heavy oxygen (O18) and Deuterium isotopes in the polar regions correlates with low temperatures.
The accumulation of heavy oxygen (O18) and Deuterium isotopes in the polar regions correlates with low temperatures.
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What significant discovery has been made through the analysis of ice core chemistry?
What significant discovery has been made through the analysis of ice core chemistry?
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What is the IPCC, and what is its role?
What is the IPCC, and what is its role?
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The IPCC's assessment report has concluded that human activities are the primary cause of the 21st century climate change.
The IPCC's assessment report has concluded that human activities are the primary cause of the 21st century climate change.
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What is the greenhouse effect, and how does it contribute to climate change?
What is the greenhouse effect, and how does it contribute to climate change?
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What is the main reason for the dramatic increase in atmospheric CO2 levels since the Industrial Revolution?
What is the main reason for the dramatic increase in atmospheric CO2 levels since the Industrial Revolution?
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What is the major cause of the increasing trend in global surface temperature?
What is the major cause of the increasing trend in global surface temperature?
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What is the primary focus of current UN-initiated interventions to address climate change?
What is the primary focus of current UN-initiated interventions to address climate change?
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What is the significance of the Kyoto Protocol?
What is the significance of the Kyoto Protocol?
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What is the main objective of the Paris Climate Agreement?
What is the main objective of the Paris Climate Agreement?
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What is the role of the Philippine Climate Change Commission?
What is the role of the Philippine Climate Change Commission?
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What is the Green Climate Fund?
What is the Green Climate Fund?
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What is the People's Survival Fund, and what is its aim?
What is the People's Survival Fund, and what is its aim?
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Study Notes
Climate Change and Society
- Climate change is the alteration of weather patterns in a place over a long time.
- Weather refers to atmospheric conditions, including temperature, humidity, precipitation, wind pressure, and the appearance of weather events like typhoons, at a particular time.
- Climate is the average weather of a place over a long time (e.g., 30 years or more). Averages of precipitation, temperature, humidity, and wind velocity help predict climate.
- The changing climate of the Earth is supported by scientific evidence.
- Modern climate data is collected using technology such as satellites.
- Paleoclimate data comes from sources like ice cores, soil, and trees, providing information about past climates spanning thousands or millions of years.
- A climate scientist gathers and analyzes data from the atmosphere, oceans, and land; creates computer models to simulate climate change; studies past climates to understand potential future changes.
- A climate scientist needs a BS or graduate degree in Atmospheric Science or a related field like Physics, Chemistry, Geology, or Engineering; strong mathematical and computing modeling skills; technical writing ability.
- The IPCC is the United Nations body responsible for assessing the science related to climate change.
- In 2013, the IPCC's 5th assessment report stated 95% certainty that human activities cause 21st-century climate change.
- The greenhouse effect is a well-established theory explaining climate change; the atmosphere traps heat-absorbing gases (like CO2, CH4, and nitrous oxides) keeping Earth's temperature suitable for life.
- Historical CO2 levels, measured from ice cores, show that current concentrations are higher than any point in the past 800,000 years, coinciding with the industrial revolution and the increased use of fossil fuels.
- Ice sheets and glaciers are losing mass (indicated by negative mass balance) worldwide, contributing to rising sea levels.
- Data from remote sensing satellites like GRACE and GRACE Follow-On shows this loss in detail.
- Loess, a specific soil type, forms from the grinding of rocks by moving glaciers, providing evidence of past ice sheet extent.
- Ice cores from ice sheets provide information about Earth's past climate changes extending thousands or millions of years.
- Ice cores hold information on past temperatures by measuring oxygen and hydrogen isotopes in water, as well as annual snowfall patterns.
- The combination of modern and paleoclimate data shows Earth's climate system is warming.
Lecture Outcomes
- Students should be able to describe climate change.
- Students should be able to discuss modern and paleoclimate data supporting climate change reality.
- Students should be able to interpret the IPCC's assessment of 21st-century climate change as anthropogenic.
- Students should be able to identify worldwide and national initiatives to mitigate climate change.
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