Global Drought Monitoring Service through the GEOSS Architecture ...
Global Drought Monitoring Service through the GEOSS Architecture ...
Global Drought Monitoring Service through the GEOSS Architecture ...
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Architectural Implementation Pilot, Phase 3 Version: 2.0<br />
<strong>Global</strong> <strong>Drought</strong> <strong>Monitoring</strong> and European <strong>Drought</strong><br />
Observatory-Water SBA Engineering Report<br />
Date: 11/Feb/2011<br />
Daily soil moisture map on is presented in form of soil suction (pF) values of <strong>the</strong> top soil layer<br />
that commonly range between 1.5 for very wet conditions up to 5.0 for very dry soils. 1 The pF<br />
value describes <strong>the</strong> forces necessary for plants to apply in order to extract water from <strong>the</strong> soil for<br />
<strong>the</strong>ir use.<br />
2.1.2.1 Development of <strong>the</strong> Soil Moisture Climatology<br />
The “climatology” for soil moisture has been derived as year-to-year outputs from <strong>the</strong><br />
LISFLOOD model, as having been generated from <strong>the</strong> Re-Analysis data of <strong>the</strong> European Centre<br />
for Medium-Range Wea<strong>the</strong>r Forecasts (ERA-40) that comprise <strong>the</strong> period 1958-2001 (i.e. 44<br />
years), along with updating made available from measured meteorological data from JRC-MARS<br />
from <strong>the</strong> <strong>Global</strong> Telecommunication System of WMO covering 1990 to 2006, i.e. a period of 17<br />
years. (Compare this with <strong>the</strong> Princeton datasets below). Soil moisture anomalies are calculated<br />
from <strong>the</strong> climatology. 2<br />
2.1.2.2 Soil Moisture Anomaly Forecasts prepared from <strong>the</strong> climatology<br />
Soil moisture and soil moisture anomaly forecasts are derived using <strong>the</strong> same modeling<br />
approach but, with <strong>the</strong> exception of using <strong>the</strong> short term meteorological forecasts ra<strong>the</strong>r than<br />
near-real-time meteorology data. In <strong>the</strong> forecasting mode <strong>the</strong> European Flood Alert System<br />
produces information on <strong>the</strong> development of soil moisture in Europe for up to ten days ahead. 3<br />
The anomaly forecast is also made. 4<br />
The trend map of soil moisture describes qualitatively <strong>the</strong> change in soil moisture, currently<br />
between today and <strong>the</strong> seventh day ahead. Orange to red colors indicate drying conditions, while<br />
yellow to green colors predict wetter conditions during <strong>the</strong> next week.<br />
1 http://desert.jrc.ec.europa.eu/action/php/index.php?action=view&id=19<br />
2 http://desert.jrc.ec.europa.eu/action/php/index.php?action=view&id=20<br />
3 http://desert.jrc.ec.europa.eu/action/php/index.php?action=view&id=21<br />
4 http://desert.jrc.ec.europa.eu/action/php/index.php?action=view&id=22<br />
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