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NZ Weather Research Report

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NZ Weather Research Report

Use the source pack and data below to investigate how weather forms, how it affects people and places, and how to report evidence carefully. Then write a short scientific report. You do not need to look anything up. Distinguish weather (conditions over a short time) from climate (long-term patterns).

Source pack: Aotearoa’s varied weather

New Zealand’s weather changes quickly because the country lies in the mid-latitude westerly wind belt and is surrounded by ocean. Moist air arriving from the Tasman Sea rises over the Southern Alps, cools and condenses, bringing heavy rain to parts of the West Coast. Air descending on the eastern side is often drier; a warm, dry föhn wind is known locally as a nor’wester. Tropical cyclones can sometimes move south and affect New Zealand as weakened ex-tropical cyclones. Fronts, low-pressure systems and local geography all influence weather. Climate change does not cause every individual storm, but it can shift the odds and increase some risks: a warmer atmosphere can hold more water vapour, contributing to heavier rainfall when conditions are right. Attribution of a particular event needs evidence. Impacts depend on exposure and preparedness as well as the weather itself.

Station

Three-day rainfall (mm)

Peak wind gust (km/h)

West Coast foothills

186

Canterbury plains

Investigate and interpret

Use evidence from the source pack and mini data set. Show your reasoning where useful.

1.In your own words, explain the difference between weather and climate. Give one example of each.

2.Trace the West Coast rainfall process: what happens to moist air as it reaches the Southern Alps, and why can the eastern side be drier?

3.Which station recorded the greater rainfall, and by how many millimetres?

4.The Canterbury station had the higher peak gust. Give one reason rainfall and wind measurements might show different regional patterns during the same weather system.

5.A student says, “Climate change caused this exact storm.” Which is the most scientifically careful response?

That is always true for every storm.
One storm alone proves nothing; attribution needs evidence, although climate change can affect the likelihood or intensity of some hazards.
Climate change cannot affect rainfall or storms.
Weather and climate mean exactly the same thing.

6.True or false: If the atmosphere is warmer, it can hold more water vapour, which may contribute to heavier rainfall when weather conditions produce rain. Explain briefly.

7.Match each term to its best meaning.

Front
Föhn wind
Drought
Ex-tropical cyclone

Former tropical cyclone that has moved out of the tropics and changed
Boundary between air masses with different characteristics
Warm, dry wind descending on the sheltered side of mountains
Extended period of unusually low water availability

8.Identify two possible impacts of a period of very heavy rain in New Zealand. For each, explain one factor besides rainfall amount that could make the impact worse or reduce it.

9.Plan a fair comparison of rainfall between two NZ regions. Name two kinds of information you would collect and one way to keep the comparison fair.

10.Write a concise report of 100–150 words for a community newsletter. Include a clear title, the data comparison, a weather-process explanation, one possible impact, and a careful statement about climate change. Use at least two scientific terms from this sheet.