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Instruments > In Situ/Laboratory Instruments > Chemical Meters/Analyzers > HTDMA

Preferred term

HTDMA  

Definition

  • Most particles in the atmosphere take up water when exposed to increasing relative humidity – this often explains the poor visibility during the early morning hours when the relative humidity is high and particles have swollen in size and more effectively scatter solar radiation. When we inhale particles they also grow into water droplets, how large they grow determines where they deposit in our respiratory systems. Brechtel developed the first commercial version of the Humidified Tandem Differential Mobility Analyzer (HTDMA) so researchers who wanted to explore the complexities of particle water uptake no longer had to build their own instruments, instead they could rely on our 20 plus years of experience with HTDMAs to invest in a solution that would let them focus on their science and not the tool. (en)

Broader concept

Change note

  • 2021-05-11 09:38:43.0 [tstevens] Insert Concept add broader relation (HTDMA [f39b155d-7818-4812-8806-50d4d356d380,606926] - Chemical Meters/Analyzers [3d25724b-832f-4a61-b0b2-4f2ccecdba94,598603]);
  • 2021-05-11 09:40:00.0 [tstevens] insert AltLabel (id: null category: primary text: Humidified Tandem Differential Mobility Analyzer language code: en); insert Definition (id: null text: Most particles in the atmosphere take up water when exposed to increasing relative humidity – this often explains the poor visibility during the early morning hours when the relative humidity is high and particles have swollen in size and more effectively scatter solar radiation. When we inhale particles they also grow into water droplets, how large they grow determines where they deposit in our respiratory systems. Brechtel developed the first commercial version of the Humidified Tandem Differential Mobility Analyzer (HTDMA) so researchers who wanted to explore the complexities of particle water uptake no longer had to build their own instruments, instead they could rely on our 20 plus years of experience with HTDMAs to invest in a solution that would let them focus on their science and not the tool language code: en);
  • 2021-05-11 09:41:46.0 [tstevens] update Definition (Most particles in the atmosphere take up water when exposed to increasing relative humidity – this often explains the poor visibility during the early morning hours when the relative humidity is high and particles have swollen in size and more effectively scatter solar radiation. When we inhale particles they also grow into water droplets, how large they grow determines where they deposit in our respiratory systems. Brechtel developed the first commercial version of the Humidified Tandem Differential Mobility Analyzer (HTDMA) so researchers who wanted to explore the complexities of particle water uptake no longer had to build their own instruments, instead they could rely on our 20 plus years of experience with HTDMAs to invest in a solution that would let them focus on their science and not the tool.);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/f39b155d-7818-4812-8806-50d4d356d380

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