Weather Hazards Flashcards

Question

What is global warming?

Answer 1

The term used to describe the sharp rise in global temperatures over the last century?

Answer 2

**Ice and Sediment Cores** - A layer of ice forms each year so by drilling down scientists can analyse the trapped gas in the layers and determine the change in temperature. **Tree Rings** - Tree rings are thicker in warmer wet conditions and as one ring grows a year scientists can determine temperature in each period. **Pollen Analysis** - Pollen from plants is preserved in sediment. Scientists can identify and date preserved pollen to determine the species alive at the time. They know which plants grew well in what conditions

Answer 3

**Orbital changes** - Change how much solar radiation the earth receives. The shape of the earth's orbit changes leading to glacial and interglacial cycles of the quaternary period **Volcanic Activity** - Large quantities of material are erupted into the atmosphere and some of the particles can reflect the Sun's rays back out to space causing brief cooling. **Solar output** - Inconsistency in sun's energy output - not thought to have a massive change.

Answer 4

Through the **ENHANCED GREENHOUSE EFFECT** where greenhouse gases absorb outgoing heat from the earth causing temperatures to rise. Humans are increasing the volume of greenhouse gases through: Burning Fossil fuels - Carbon Dioxide Farming - Methane Deforestation - Carbon Dioxide Cement Production - Cement is made from limestone, which contains carbon and when cement is produced carbon dioxide is released.

Answer 5

**Glaciers and ice sheets melt** - rising sea levels - low lying coastal areas may flood more frequently eg. Miami. Loss of habitat **Loss of polar habitats** **Coral is bleaching due to rising sea levels** affects biodiversity in this interdependent ecosystem. **Biodiversity may decrease** - Species have had to move to higher latitude for cooler temperatures. Habitats may be destroyed because of climate change - Species that have adapted may become extinct - Pandas rely on bamboo that is limited by climate change

Answer 6

1.0 - 5.7 C

Answer 7

Rising sea levels may cause places to become uninhabitable eg. low lying areas of the Maldives - may lead to migration and over crowding in other areas. Struggling water supply due to changing precipitation patterns. Can lead to political tension. Smaller yield of crops leads to food shortages. - malnutrition and illness Some high latitude farmers are benefiting from higher temps and getting a higher yield.

Answer 8

Aiming to reduce the cause of something.

Answer 9

Adjusting to the effects of something

Answer 10

**Afforestation** - Photosynthesise that requires the absorption of photosynthesis. **Carbon Capture** - Carbon Capture and Storage reduces the emission from power station burning fossil fuels. Capture CO2 and transports it to safe places for storage. **Alternative Energy Production** - Renewable and nuclear reduce greenhouse gas emissions. **International Agreements** Paris Agreement aims to reduce greenhouse gas emissions. Also encourages developed countries to help developing countries deploy mitigation strategies.

Answer 11

**Changing agricultural systems** Reduced rainfall and different patterns means less reliable crops. People are: Planting new crop types that are more suited to the environment. Also using biotechnology to create hardier and more drought resistant crops. **Managing water supply** Water meters - Discourage water use Rainwater and waste water can be collected and recycled **Coping with Rising Sea Levels** Flood defences eg. Thames Barrier Better flood warning systems Poor areas are building houses in raised areas eg. embankments

Weather Hazards Flashcards

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