PANGAEA_938685 Unshielded precipitation gauge collection efficiency with wind speed and hydrometeor fall velocity Hoover, Jeffery; Earle, Michael E; Joe, Paul Unshielded precipitation gauge collection efficiency with wind speed and hydrometeor fall velocity 2021-11-29 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.938685 Investigator Jeffery Hoover jeffery.hoover@ec.gc.ca Earth Science DATE/TIME HEIGHT above ground Precipitation Wind speed Temperature, air Precipitation description Fall velocity geoscientificInformation CAR, Centre for Atmospheric Research Experiments CARE_SPICE catch efficiency collection efficiency Monitoring station precipitation amount precipitation gauge Precipitation Occurrence Sensor System SPICE unshielded DFAR - Double Fence Automated Reference Unshielded KUniversal - Universal transfer function KCARE - Climate-specific transfer function CFD - Computational fluid dynamics modelling function HE1 - Experimental fall velocity threshold function HE2 - Experimental linear fall velocity dependence function Monitoring station 2013-11-17 2015-04-23 Complete 44.23 44.23 -79.78 -79.78 2.0 m (HEIGHT above ground) 2.0 m (HEIGHT above ground) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 6168 data points text/tab-separated-values Hoover, Jeffery; Earle, Michael E; Joe, Paul; Sullivan, Pierre E (2021): Unshielded precipitation gauge collection efficiency with wind speed and hydrometeor fall velocity. Hydrology and Earth System Sciences, 25(10), 5473-5491, https://doi.org/10.5194/hess-25-5473-2021 Precipitation gauge collection efficiency with wind speed and hydrometeor fall velocity - README (URI: https://download.pangaea.de/reference/111046/attachments/Data_Description_Experiment_20210920.pdf)

Collection efficiency transfer functions that compensate for wind-induced collection loss are presented and evaluated for unshielded precipitation gauges. Three novel transfer functions with wind speed and precipitation fall velocity dependence are developed, including a function from computational fluid dynamics modelling (CFD), an experimental fall velocity threshold function (HE1), and an experimental linear fall velocity dependence function (HE2). These functions are evaluated alongside universal (KUniversal) and climate-specific (KCARE) transfer functions with wind speed and temperature dependence. Transfer function performance is assessed using 30-minute precipitation event accumulations reported by unshielded and shielded Geonor T-200B3 precipitation gauges over two winter seasons. The latter gauge was installed in a Double Fence Automated Reference (DFAR) configuration. Estimates of fall velocity were provided by a Precipitation Occurrence Sensor System (POSS). The CFD function reduced the RMSE (0.08 mm) relative to KUniversal (0.20 mm), KCARE (0.13 mm), and the unadjusted measurements (0.24 mm), with a bias error of 0.011 mm. The HE1 function provided a RMSE of 0.09 mm and bias error of 0.006 mm, capturing well the collection efficiency trends for rain and snow. The HE2 function better captured the overall collection efficiency, including mixed precipitation, resulting in a RMSE of 0.07 mm and bias error of 0.006 mm. These functions are assessed across solid and liquid hydrometeor types and for temperatures between -22 °C and 19 °C. The results demonstrate that transfer functions incorporating hydrometeor fall velocity can dramatically reduce the uncertainty of adjusted precipitation measurements relative to functions based on temperature. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.938685"!

http://en.wikipedia.org/wiki/Height HEIGHT above ground http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.org/10.5194/hess-25-5473-2021 Unshielded precipitation gauge collection efficiency with wind speed and hydrometeor fall velocity https://library.wmo.int/doc_num.php?explnum_id=5686 SPICE DIF 9.4 2021-11-29 2025-03-12