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Groups: Drought

  • Anomaly PED, 2013/14–2015/16

    Ministry for the Environment
    Potential evapotranspiration deficit (PED) can be thought of as a drought index. It is the difference between how much water could potentially be lost from the soil through evapotranspiration and how much is actually available. When PED is high, plants do not have the full amount of water available they need for growth. As our climate changes, increasing...
    Created 2 February 2020 Updated 1 October 2022
  • Trends in PED, 1972/3–2015/6

    Ministry for the Environment
    Trends in potential evapostranspiration deficit (PED), 1972–2016. Soil moisture is vital for plant growth. When plants cannot access the water they need, growth is reduced, affecting crops and food for livestock, and native biodiversity. Over a sustained period, a drought can have significant social and economic costs, particularly for rural communities....
    Created 2 February 2020 Updated 1 October 2022
  • The annual SOI compared with New Zealand's detrended temperature series (1909...

    Ministry for the Environment
    El Niño Southern Oscillation (ENSO). It is an important predictor of how tropical oceans and climate might influence New Zealand’s climate. Being able to predict the timing and intensity of an El Niño or La Niña climate phase is important in predicting and preparing for extreme climatic conditions, such as strong winds, heavy rain, or drought. Such...
    Created 2 February 2020 Updated 1 October 2022
  • Potential evapotranspiration deficit (PED), 1972–2016

    Ministry for the Environment
    Interpolated PED values at 30 regionally representative sites. Soil moisture is vital for plant growth. When plants cannot access the water they need, growth is reduced, affecting crops and food for livestock, and native biodiversity. Over a sustained period, a drought can have significant social and economic costs, particularly for rural communities....
    Created 2 February 2020 Updated 1 October 2022