How well can near infrared reflectance spectroscopy (NIRS) measure sediment organic matter in multiple lakes?

• DOI: 10.1007/s10933-020-00121-5
• Publication Date: 2020-05-19T04:10:01Z
• Authors: Francisco Javier ...; Antony G. Brown; Charlotte Clarke; Per Sjøgren; John Inge Svendsen; Inger Greve Alsos
• Keywords: Loss on ignition

Abstract Loss-on-ignition (LOI) is the most widely used measure of organic matter in lake sediments, a variable related to both climate and land-use change. The main drawback for conventional measurement methods processing time hence high labor costs associated with high-resolution analyses. On other hand, broad-based near infrared reflectance spectroscopy (NIRS) cost efficient method carbon content lacustrine sediments once predictive are developed. NIRS-based models robust when applied properties that already included calibration dataset. To test potential broad applicability NIRS samples foreign model using linear corrections, sediment cores from six lakes (537 samples, LOI range 1.03–85%) were as reference develop model. was assessed by sequentially removing one dataset, developing new then validating it against removed lake. Results indicated has power (RMSEP < 4.79) need intercept slope correction measured NIRS. For studies involving many time-efficient estimate on only bias adjustments different records.