Light Absorbing Heating Method
The LAHM instrument was developed in response to Natural Systems Research LLC owner's experiences with the American Climber Science Program (ACSP, www.climberscience.org). ACSP began in 2011 and from the beginning, measurements of light absorbing particles on glaciers has been one of the main research projects. The light absorbing particle research led to a publication in The Cryosphere in 2015 which featured an earlier version of the LAHM instrument. Since the 2015 publication, the LAHM instrument has been completely re-developed into the version that we are marketing. For detailed information on version 6.1 of the LAHM instrument, feel free to download the owner's manual. A scientific publication on LAHM 6.1 is currently nearing submission and will be posted online when published.
Currently, four scientific articles have been published in peer reviewed journals which use LAHM instruments:
Torres, Suarez, Schmitt, Estevan, Helmig, 2018: Measurement of light absorbing particles in the snow of the Huaytapallana glacier in the central Andes of Peru and their effect on albedo and radiative forcing, Optica pura y aplicada, vol. 51, issue 4. Link to article
Sanchez Rodriguez and Schmitt, 2018: PartÃculas absorbentes de luz durante El NiÃ±o y El NiÃ±o Costero en los glaciares de la Cordillera Blanca, Revista de Glaciares y Ecosistemas de MontaÃ±a, vol. 4, 9-22. Link to journal issue
Khan, Dierssen, Schwarz, Schmitt, Chlus, Hermanson, Painter, and McKnight, 2017: Impacts of coal dust from an active mine on the spectral reflectance of Arctic surface snow in Svalbard, Norway. Journal of Geophysical Research: Atmospheres, vol. 122, 1767-1778. Link to article
Schmitt, All, Schwarz, Arnott, Cole, Lapham, and Celestian, 2015: Measurements of light-absorbing particles on the glaciers in the Cordillera Blanca, Peru, The Cryosphere, vol. 9, 331-340. Link to article
Several additional publications are in preparation or in review.
Instrument and equipment prices
If you are interested in an instrument, the cost is $1500. This includes the instrument, all software necessary for operation, and analysis. We calibrate each instrument after manufacture and adjust analysis software for your specific instrument.
Also included is either an in person demonstration / lesson on how to use the instrument or a skype video session if it isn't possible to visit the site.
We will also sell equipment for sampling if you are unable to afford an instrument and can analyze your filters after you collect them. Prices range from $15 to $20 per sample depending on the quantity. This includes all equipment necessary for collecting the samples plus analysis after you return the filters.
Contact us at: naturalsystemsresearch (at) gmail (dot) com