What are the impacts of Climate Change for Wairarapa

Temperature in 2090  

• Spring: +0.6°C to +2.7°C
• Summer: +0.7°C to +3.1°C
• Autumn: +0.7°C to +3.1°C
• Winter: +0.7°C to +3.2°C

Rainfall in 2090

• Spring: -3% to +2%
• Summer: -1% to +8%
• Autumn: 0 to +3%
• Winter: -7% to +1 %
• No significant change in the frequency of extreme rainy days

Wind in 2090

  • +2% to +3% of extremely windy days

Storms

  • Increase in storm intensity, local wind extremes and thunderstorms
  • Small changes in the frequency of storms compared to natural inter-annual variability

Source: https://www.mfe.govt.nz/climate-change/likely-impacts-of-climate-change/how-could-climate-change-affect-my-region/wellington

These figures are projected changes relative to 1986 – 2005 levels. The values provided capture the range across all scenarios ranging from low to high greenhouse gases concentration (high efforts to reduce our emissions to low or no effort).

The values are based on scenario estimates and should not be taken as definitive.

Sea-level rise (source: Mitchell Daysh – Greater Wellington – Preparing Coastal communities for Climate Change – June 2019)

  • +26 cm since early 20th Century (+2.23 mm/year)

What does Climate Change mean for Wairarapa?

Coastal hazards: Increased risk to coastal roads and infrastructure from coastal erosion and inundation, increased storminess and sea-level rise.

Heavy rain: Increased risk of surface flooding. River flooding may also become more frequent and more intense.

Erosion and landslides: Increased risk of erosion and landslides.

Droughts: More frequent droughts are likely to lead to water shortages, increased demand for irrigation and increased risk of wild fires.

Agriculture: Warmer temperatures, a longer growing season and fewer frosts could provide opportunities to grow new crops. Farmers might benefit from faster growth of pasture and better crop growing conditions. However, these benefits may be limited by the negative effects of Climate Change such as prolonged drought, water shortages and greater frequency and intensity of storms.

Biosecurity: Climate Change could lead to changes in pests and diseases over time. A likely increase in weed species and subtropical pests and diseases could require new pest management approaches. Biodiversity may be threatened by changing temperature and rainfall patterns, and sea level rise.

Biodiversity: Biodiversity is suffering from Climate Change due to the rate of change. It is very fast compared to historic change species have experienced.

Ocean acidification: Because the ocean absorbs a huge quantity of the CO2 released in the atmosphere, it becomes more and more acidic. This impacts negatively on all marine species, especially shellfish such as kina and paua.

The impacts of Climate Change are global, and everyone needs is affected

In the next section, we will see what we can do to Mitigate and Adapt to Climate Change.

South Wairarapa District Council