Soil spectroscopy: a method for proximal soil sensing Raphael VISCARRA ROSSEL Soil & landscape program CSIRO Land & Water 2 nd Global Workshop on Proximal Soil Sensing 15–18 May 2011 Summary 1.Proximal soil sensing - spectroscopy 2.The information content of soil spectra 3.Spectral libraries – The Global Spectral Library 4.Field measurements – proximal soil sensing 5.Concluding remarks Techniques used for proximal soil sensing ʻ…the use of sensors in the field to obtain signals from the soil when the sensorʼs detector is in contact with or close to it.ʼViscarra Rossel et al., 2011 Adv. Agron. Spectrocopy for proximal soil sensing vis–NIR and mid-IR spectroscopy can measure (directly/indirectly) many soil propertiesvis–NIR with remote and proximal soil sensing 400 800 1200 1600 2000 2400 Wavelength /nm Log 1/R Combination 1 st OT 2 nd OT 3 rd OT vis 2380 2250 1920 1420 950 680 550 450 2300 2220 satellite airborne laboratory static on-the-go Remote sensing Proximal sensing 3 vis Combination lli i th mid-IR with remote and proximal soil sensing satellite airborne laboratory static on-the-go Remote sensing Proximal sensing lli tatic th 400 900 1400 1900 2400 2900 3400 3900 Wavenumbers /cm -1 Log 1/R Fingerprint X-H Stretch TB DB 3695 3630 3400 2930 2850 2515 2000 1870 1790 1640 1530 1465 1350 1275 1160 920 1020 800 700 1000 1050 1080 1450 2590 ?
6
Embed
Summary - McGill University€¦ · Viscarra Rossel et al., 2006 Geoderma; 2008 Biosys. Eng.. vis–NIR & mid-IR…smaller, cheaper instruments vis–NIR mid-IR MEMS 2. The information
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Soil spectroscopy: a method for proximal soil sensing�
Raphael VISCARRA ROSSEL Soil & landscape program CSIRO Land & Water 2nd Global Workshop on Proximal Soil Sensing 15–18 May 2011
Summary�
1. Proximal soil sensing - spectroscopy�
2. The information content of soil spectra�
3. Spectral libraries – The Global Spectral Library�
4. Field measurements – proximal soil sensing�
5. Concluding remarks�
Techniques used for proximal soil sensing�
ʻ…the use of sensors in the field to obtain signals from the soil when the sensorʼs detector is in contact with or close to it.ʼ�
Viscarra Rossel et al., 2011 Adv. Agron.�
Spectrocopy for proximal soil sensing�
vis–NIR and mid-IR spectroscopy can measure (directly/indirectly) many soil properties�
Spectroscopic predictions using Australian library with PLSR�
High resolution DSM (0–30 cm)�with SMLR��
CSIRO.
Concluding remarks�
Development of spectral libraries is not PSS but is needed to support spectroscopic PSS��Soil spectra are integrative and measure the fundamental composition of soils: their organic matter, mineral and water contents – can be used for the assessment of soil condition!��The global soil spectral library combined will be made available for all to use��Proximal soil vis–NIR sensing – a useful tool for pedologists, for soil mapping…and monitoring!�� �
Acknowledgements�Ms Fanny Collard�Mr Mark Glover�Ms Seija Tuomi�