Weather and Climate Flashcards

(50 cards)

1
Q

Main ocean current in the Northern Hemisphere

A

Gulf Stream - North Atlantic Drift

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2
Q

North Atlantic Drift

A

Surface current carried by the South Westerlies - makes the UK winter milder.

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3
Q

Milankovitch cycles

A

Eccentricity, axial tilt and precession - changes in the Earth’s orbit around the Sun or changes in its axis, leading to changes in the Earth’s climate or seasonal variation.

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4
Q

High pressure vs low pressure

A

Little rainfall vs high rainfall.

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5
Q

South Westerlies

A

Warm, moist prevailing wind for the UK - hits the west first, causing more rainfall in the west than the east.

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6
Q

Volcanism

A

Big volcanic eruptions produce ash and sulfur dioxide that block and sunlight reflect it back into space, cooling the planet.

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7
Q

Solar variation

A

More black sunspots = higher temperature.

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8
Q

Climate

A

Average conditions of the atmosphere in an area over a long period of time (e.g. temperature, rainfall).

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9
Q

Weather

A

The short day to day conditions of the atmosphere.

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10
Q

Coriolis effect

A

Deflection of wind due to the spinning of the Earth on its axis.

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11
Q

Tropical cyclone weather hazards

A

High winds, intense rainfall, storm surges, coastal flooding, landslides.

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12
Q

Hurricane Sandy date

A

Made landfall in New Jersey on 29/08/12.

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13
Q

Hurricane Sandy - Social impacts

A

150 people dead, subway stations and road tunnels flooded, schools closed, no power, temporary homelessness.

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14
Q

Hurricane Sandy - Economic impacts

A

$65 billion in property damage, $3.3 billion in insurance claims, NY Marathon cancelled, NY stock exchange closed for several days.

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15
Q

Hurricane Sandy - Environmental impacts

A

NJ beaches damaged, raw sewage released into waters, oil spills destroyed habitats, nature reserves damaged.

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16
Q

Hurricane Sandy - Responses by individuals

A

Social media used to co-ordinate aid, most people had home insurance and rebuilt quickly, people moved in with relatives and into shelters.

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17
Q

Hurricane Sandy - Responses to environmental impacts

A

NJ beaches reopened, farmland and floodplains repaired, nature reserves restored.

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18
Q

Hurricane Sandy - Responses by organisations

A

NGOs sent relief workers and volunteers to hard-hit areas with food and supplies, charity concerts, telethons, corporate donations.

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19
Q

Hurricane Sandy - Responses by the government

A

$60.3 billion in aid, $6.2 million for emergency food assistance, flood-prone homes bought out by government.

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20
Q

Typhoon Haiyan date

A

Hit Philippines on 7/11/13 as a Category 5 cyclone.

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21
Q

Typhoon Haiyan - Social impacts

A

6,000 dead, 25,000 injured, 1500 missing, widespread destruction in Tacloban city, power cut off, looting, transport networks cut off.

22
Q

Typhoon Haiyan - Economic impacts

A

$2 billion worth of damage, $85 million worth of farm related damage, coconut and rice plantations destroyed.

23
Q

Typhoon Haiyan - Environmental impacts

A

Chemical leaks, forests destroyed, mangroves destroyed, drinking water contaminated by sea water, lack of sanitation.

24
Q

Typhoon Haiyan - Responses to environmental impacts

A

Water tanks installed in some areas, work on restoring public sanitation systems began a month after.

25
Typhoon Haiyan - Responses by individuals
Survivors searched the flattened settlements for bodies, street sellers set up an informal economy to sell food, social media was used to co-ordinate relief efforts.
26
Typhoon Haiyan - Responses by organisations
Water tanks installed by Oxfam, Red Cross provided materials for shelters and rebuilt storm-resistant homes, charities sent emergency supplies to Tacloban.
27
Typhoon Haiyan - Responses by government
Troops sent to Tacloban to restore order, EU, UK and USA sent millions in aid, equipment sent to clear debris, initiatives created to reduce disaster and adapt to climate change, water and sanitation set up and privatised.
28
Drought
When an area suffers from a gradual reduction in the availability of water.
29
Meteorological drought
When dry weather patterns dominate an area.
30
Hydrological drought
When there is a very low water supply in streams, rivers, lakes and reservoirs.
31
Natural causes of drought
El Niño, low levels of precipitation, low levels of water in supplies.
32
Human causes of drought
Dams, deforestation, agriculture.
33
California - causes
Lower rainfall than usual over a four year period, reduced water in the Colorado River due to over abstraction, high wastage of water.
34
California - Social impacts
Some land sunk and damaged buildings (subsidence), hydroelectric power reduced, wildfires endangered lives and destroyed homes.
35
California - Economic impacts
Wildfires caused millions of dollars of property damage, $1.8 billion and 10,000 jobs lost by farms, increased food prices, contamination of farmland.
36
California - Environmental impacts
Rivers and wetlands didn't receive much rainfall so plants and animals were at risk, sea water contaminated groundwater supplies, ash and debris contaminated water supplies.
37
California - Responses by individuals
California residents implemented several water saving measures, farmers planted smaller crops and only certain types.
38
California - Responses by organisations
Restaurants didn't put water on the table, hotels asked guests to reuse linen and towels, NASA developed advanced forecasting models.
39
California - Responses by government
State of emergency declared in January 2014, strict water limits, facilities installed to prevent water contamination, education on water use, $183 million given from federal government funds.
40
Ethiopia - causes
Two periods of rain that the country relies on are getting shorter and more unpredictable, 75% of the population rely on farming which leads to over abstraction.
41
Ethiopia - Social impacts
Lack of trees meant lack of building materials, reduced food supplies lead to famine, children are unable to go to school and women are unable to work as they have to walk miles to get water, causes rural to urban migration.
42
Ethiopia - Economic impacts
Crop failure (dropped by 50%-90%), increase in food prices.
43
Ethiopia - Environmental impacts
Hundreds of thousands of livestock have starved, water insecurity and disease due to polluted water supplies.
44
Ethiopia - Responses by individuals
Farmers developed coping mechanisms such as migrating to less affected areas and adapting farming practices.
45
Ethiopia - Responses by organisations
Millions of dollars raised to provide food and water, invested in long term schemes, 'Live Aid' organised to raise money.
46
Ethiopia - Responses by government
Productive Safety Net Programme created which employs people in return for food and cash, early warning systems created, $300 million spent to help those affected by the drought.
47
Ice cores
Compressed layers of ice containing gases - long term.
48
Tree rings
Wider in warmer weather, thinner in cold weather - short or medium term.
49
Pollen analysis
Trapped in ice and rocks, not well preserved - short term.
50
Historical records
Reports, paintings, photos, diaries - short or medium term.