soil moisture deficit niwa

Soil moisture deficits vary across the country and from year to year, with deficits ranging from 0 (saturated soil) to over 500mm (very dry). The daily mean soil temperatures at Dargaville and Warkworth have spiked up late November 2017, running at 4-5 degrees warmer than expected.

A weekly update describing soil moisture patterns across the country to show where dry to extremely dry conditions are occurring or imminent. The analysis is done for an average soil type where the available water capacity is taken to be 150 mm. Rainfall is assumed to infiltrate into a soil store from which moisture is depleted by evapotranspiration loss. 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. NIWA has projected 75% chance of average to below average rainfall with an 80% chance of average to below average river flows and soil moisture levels until December 2018. 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. 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. ... soil moisture deficit, soil moisture deficit anomaly, and the potential evapotranspiration deficit. When the soil store is full, it is assumed to be saturated and the excess rainfall becomes surface runoff. Source: NIWA – National Institute of Water and Atmospheric Research. Daily climate maps. The model keeps track of the soil store for each timestep. Despite recent rain, the area around Gisborne remains in soil moisture deficit and follows one of the driest Aprils in the past 115 years. 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. The Soil Moisture Anomaly map shows the difference between the current and historical soil moisture deficits. These maps (click for full sized versions) are updated daily and are based on data from our 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. 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. 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. 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. 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. 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.

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