Soil Moisture Clim; Soil Wetness Clim; Evaporation Precipitation Runoff Temperature Summary Recent Anomalies OUTLOOK: About Us Our Mission Who We Are Contact Us CPC Information CPC Web Team : HOME >Land Surface Monitoring and Prediction: Soil Moisture (mm) Move cursor over product parameter name to display the graphic. Niwa forecaster Nava Fedaeff said soil moisture was lower than normal for this time of year, particularly in Northland, Auckland, north Waikato and Coromandel. The 3-panel Soil Moisture Deficit (SMD) map shows the historical soil moisture deficit at the date shown (left), the soil moisture deficit at the same time last year (middle) and the current soil moisture deficit (right). Soil moisture anomaly : the difference between the historical normal soil moisture deficit (or surplus) for a given time of year and actual soil moisture deficits. All historical averages are based on the 30-year period 1981-2010. Climate records held by the National Institute of Water and Atmospheric Research (Niwa) show it was the sixth driest April since weather data started being recorded here in 1905. When the soil store is full, it is assumed to be saturated and the excess rainfall becomes surface runoff. The NIWA climate models are leaning towards average to below average conditions leading into summer. Soil moisture deficit: the amount of water needed to bring the soil moisture content back to field capacity, which is the maximum amount of water the soil can hold. Regions experiencing significant soil moisture deficits are deemed “hotspots”. Rainfall is assumed to infiltrate into a soil store from which moisture is depleted by evapotranspiration loss. Source: NIWA – National Institute of Water and Atmospheric Research. Gerard Hutching 11:06, Mar 29 2017. ... soil moisture deficit, soil moisture deficit anomaly, and the potential evapotranspiration deficit. Soil moisture anomaly: the difference between the historical normal soil moisture deficit (or surplus) for a given time of year and actual soil moisture deficits. All NIWA stations from the mid-north down are recording soil moisture deficits from 108-125mm, well below the average for this time of the year. The analysis is done for an average soil type where the available water capacity is taken to be 150 mm.

The index, called the New Zealand Drought Index (NZDI), is a climate data-based indicator of drought based on four commonly-used climatological drought indicators: the Standardised Precipitation Index, the Soil Moisture Deficit, the Soil Moisture Deficit Anomaly, and the Potential Evapotranspiration Deficit. NIWA's National Climate Database. Soil moisture anomaly : the difference between the historical normal soil moisture deficit (or surplus) for a given time of year and actual soil moisture deficits. Source: CliFlo. The daily mean soil temperatures at Dargaville and Warkworth have spiked up late November 2017, running at 4-5 degrees warmer than expected. Definition: Climate station data of the number of days in soil moisture deficit from around New Zealand was sourced from NIWA.

Soil moisture deficit in the pasture root zone at the end of May (right) compared with the deficit at the same time last year (centre) and the long term end of May average (left). "The NIWA model, as shown in Figure 2, has one parameter, the soil store capacity (Smax). Soil moisture deficits vary across the country and from year to year, with deficits ranging from 0 (saturated soil) to over 500mm (very dry). Soil moisture deficit: the amount of water needed to bring the soil moisture content back to field capacity, which is the maximum amount of water the soil can hold. A weekly update describing soil moisture patterns across the country to show where dry to extremely dry conditions are occurring or imminent. The model keeps track of the soil store for each timestep. Soil moisture deficit: the amount of water needed to bring the soil moisture content back to field capacity, ... NIWA: More Snow On Glaciers But No Good News, Say Scientists. Daily climate maps.

The Soil Moisture Anomaly map shows the difference between the current and historical soil moisture deficits. 1983/84 is an example of a wet growing season, with much of New Zealand having a potential evapotranspiration deficit (PED) of less than 100mm.

Total: Anomaly: Percentile: Change: Daily: Monthly : Last Day … NIWA launches new drought monitor. Soil moisture deficit: the amount of water needed to bring the soil moisture content back to field capacity, which is the maximum amount of water the soil can hold.