1. 1 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Metrology for weather extremes

2. 2 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Introduction n Extreme events –Low probability –Disastrous consequences (aggravated by unwise urban development, overpopulation of coastline areas and human impact on natural environments –Climate events (storms/hurricanes, floods, droughts, …) n Research efforts to increase the capacity for advance warning and preparedness 12/01/2015

3. 3 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Rain n Enhanced temporal approach of rain intensity measurements –Application: sizing of building components, rain drainage systems, green roof durability,…. n Proposed tasks –Development of fast response rain gauge, step time of 30 s, resolution 0,02 mm –Need for traceable calibration of rain gauges in extreme conditions (High intensity rain fall, Presence of strong wind / wind gusts, Presence of ice) F Use reference water flow labs expertise to develop rain gauge dynamic reference calibration benches –Based on gravimetric liquid flow methods + anemometry + hygrometry + dynamic reference rain gauge prototype (CSTB) –Traceable calibration of rain gauges in regard to wind speed intensity, rain fall intensity and ice/liquid water content

4. 4 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Wind n Anemometer response under high intensity precipitation, extreme temperature or intense solar radiation –Application: Reliability of measured wind velocities in extreme climatic conditions. n Measurement of wind pattern in urban environment with LIDARs F Application: enhanced knowledge of wind conditions due to Urban Heat Island, F Data collection related to extreme and local wind events i.e. downburst, tornadoes,.. n Proposed tasks: –Impact of climatic conditions on anemometers response (US and cup anemometers) –Traceability of LIDARs system and validation in urban areas

5. 5 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Snow/Ice n Measurement of solid/liquid ratio of freezing precipitation –Characterization of wet snow events –Application: assessment of the wet snow accretions to structures, risk assessment n Proposed task: –Traceability for measurement of ice accumulation –Development of a new traceable method/instrument for the characterization of snow (e.g. ratio snow/liquid water) –Modelisation / CFD

6. 6 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Dew condensation in arid zone n In arid zone –Deposition of dew has the same magnitude as rainfall in arid zone in terms of hydrological contribution –Dew condensation could be the key for drinkable water management –Few instruments exist with a lack of traceability and some existing bias n Proposed task: –Improve traceability for measurement of dew and leaf wetness –Development of instrument/method for measuring dew –Modelisation / CFD

7. 7 12/01/2015 Metrology for environmental extremes EMPIR Workshop on Environment Call 2016 Thanks for your attention