A differential emissivity imaging technique for measuring hydrometeor mass and type

<p>The Differential Emissivity Imaging Disdrometer (DEID) is a new evaporation-based optical and thermal instrument designed to measure the mass, size, density and type of individual hydrometeors as well as their bulk properties. Hydrometeor spatial dimensions are measured on a heated metal pl...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	D. K. Singh, S. Donovan, E. R. Pardyjak, T. J. Garrett
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental engineering TA170-171 Earthwork. Foundations TA715-787
Acceso en línea:	https://doaj.org/article/5ebb3749d7f34ec4ab80f0583b5fc0dc
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5ebb3749d7f34ec4ab80f0583b5fc0dc
record_format	dspace
spelling	oai:doaj.org-article:5ebb3749d7f34ec4ab80f0583b5fc0dc2021-11-04T13:49:00ZA differential emissivity imaging technique for measuring hydrometeor mass and type10.5194/amt-14-6973-20211867-13811867-8548https://doaj.org/article/5ebb3749d7f34ec4ab80f0583b5fc0dc2021-11-01T00:00:00Zhttps://amt.copernicus.org/articles/14/6973/2021/amt-14-6973-2021.pdfhttps://doaj.org/toc/1867-1381https://doaj.org/toc/1867-8548<p>The Differential Emissivity Imaging Disdrometer (DEID) is a new evaporation-based optical and thermal instrument designed to measure the mass, size, density and type of individual hydrometeors as well as their bulk properties. Hydrometeor spatial dimensions are measured on a heated metal plate using an infrared camera by exploiting the much higher thermal emissivity of water compared with metal. As a melted hydrometeor evaporates, its mass can be directly related to the loss of heat from the hotplate assuming energy conservation across the hydrometeor. The heat loss required to evaporate a hydrometeor is found to be independent of environmental conditions including ambient wind velocity, moisture level and temperature. The difference in heat loss for snow vs. rain for a given mass offers a method for discriminating precipitation phase. The DEID measures hydrometeors at sampling frequencies of up to 1 Hz with masses and effective diameters greater than 1 <span class="inline-formula">µ</span>g and 200 <span class="inline-formula">µ</span>m, respectively, determined by the size of the hotplate and the thermal camera specifications. Measurable snow water equivalent (SWE) precipitation rates range from 0.001 to 200 mm h<span class="inline-formula"><sup>−1</sup></span>, as validated against a standard weighing bucket. Preliminary field experiment measurements of snow and rain from the winters of 2019 and 2020 provided continuous automated measurements of precipitation rate, snow density and visibility. Measured hydrometeor size distributions agree well with canonical results described in the literature.</p>D. K. SinghS. DonovanE. R. PardyjakT. J. GarrettCopernicus PublicationsarticleEnvironmental engineeringTA170-171Earthwork. FoundationsTA715-787ENAtmospheric Measurement Techniques, Vol 14, Pp 6973-6990 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental engineering TA170-171 Earthwork. Foundations TA715-787
spellingShingle	Environmental engineering TA170-171 Earthwork. Foundations TA715-787 D. K. Singh S. Donovan E. R. Pardyjak T. J. Garrett A differential emissivity imaging technique for measuring hydrometeor mass and type
description	<p>The Differential Emissivity Imaging Disdrometer (DEID) is a new evaporation-based optical and thermal instrument designed to measure the mass, size, density and type of individual hydrometeors as well as their bulk properties. Hydrometeor spatial dimensions are measured on a heated metal plate using an infrared camera by exploiting the much higher thermal emissivity of water compared with metal. As a melted hydrometeor evaporates, its mass can be directly related to the loss of heat from the hotplate assuming energy conservation across the hydrometeor. The heat loss required to evaporate a hydrometeor is found to be independent of environmental conditions including ambient wind velocity, moisture level and temperature. The difference in heat loss for snow vs. rain for a given mass offers a method for discriminating precipitation phase. The DEID measures hydrometeors at sampling frequencies of up to 1 Hz with masses and effective diameters greater than 1 <span class="inline-formula">µ</span>g and 200 <span class="inline-formula">µ</span>m, respectively, determined by the size of the hotplate and the thermal camera specifications. Measurable snow water equivalent (SWE) precipitation rates range from 0.001 to 200 mm h<span class="inline-formula"><sup>−1</sup></span>, as validated against a standard weighing bucket. Preliminary field experiment measurements of snow and rain from the winters of 2019 and 2020 provided continuous automated measurements of precipitation rate, snow density and visibility. Measured hydrometeor size distributions agree well with canonical results described in the literature.</p>
format	article
author	D. K. Singh S. Donovan E. R. Pardyjak T. J. Garrett
author_facet	D. K. Singh S. Donovan E. R. Pardyjak T. J. Garrett
author_sort	D. K. Singh
title	A differential emissivity imaging technique for measuring hydrometeor mass and type
title_short	A differential emissivity imaging technique for measuring hydrometeor mass and type
title_full	A differential emissivity imaging technique for measuring hydrometeor mass and type
title_fullStr	A differential emissivity imaging technique for measuring hydrometeor mass and type
title_full_unstemmed	A differential emissivity imaging technique for measuring hydrometeor mass and type
title_sort	differential emissivity imaging technique for measuring hydrometeor mass and type
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/5ebb3749d7f34ec4ab80f0583b5fc0dc
work_keys_str_mv	AT dksingh adifferentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT sdonovan adifferentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT erpardyjak adifferentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT tjgarrett adifferentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT dksingh differentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT sdonovan differentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT erpardyjak differentialemissivityimagingtechniqueformeasuringhydrometeormassandtype AT tjgarrett differentialemissivityimagingtechniqueformeasuringhydrometeormassandtype
_version_	1718444902840270848

A differential emissivity imaging technique for measuring hydrometeor mass and type

Ejemplares similares