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The design of a Space-borne multispectral canopy LiDAR to estimate global carbon stock and gross primary productivity

Rumi, Emal and Jack, James W and Henry, David M and Woodhouse, Iain and Nichol, Caroline and Macdonald, Malcolm (2011) The design of a Space-borne multispectral canopy LiDAR to estimate global carbon stock and gross primary productivity. In: Sensors, Systems & Next Generation Satellites. Sensors Systems & Next Generation Satellites, 8176 . SPIE--The International Society for Optical Engineering., Prague, Article 8176-61. ISBN 978-0-81948-803-9

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Understanding the dynamics of the global carbon cycle is one of the most challenging issues for the scientific community. The ability to measure the magnitude of terrestrial carbon sinks as well as monitoring the short and long term changes is vital for environmental decision making. Forests form a significant part of the terrestrial biosystem and understanding the global carbon cycle, Above Ground Biomass (AGB) and Gross Primary Productivity (GPP) are critical parameters. Current estimates of AGB and GPP are not adequate to support models of the global carbon cycle and more accurate estimates would improve predictions of the future and estimates of the likely behaviour of these sinks. Various vegetation indices have been proposed for the characterisation of forests including canopy height, canopy area, Normalised Difference Vegetation Index (NDVI) and Photochemical Reflectance Index (PRI). Both NDVI and PRI are obtained from a measure of reflectivity at specific wavelengths and have been estimated from passive measurements. The use of multi-spectral LiDAR to measure NDVI and PRI and their vertical distribution within the forest represents a significant improvement over current techniques. This paper describes an approach to the design of an advanced Multi-Spectral Canopy LiDAR, using four wavelengths for measuring the vertical profile of the canopy simultaneously. It is proposed that the instrument be placed on a satellite orbiting the Earth on a sun synchronous polar orbit to provide samples on a rectangular grid at an approximate separation of 1km with a suitable revisit frequency. The systems engineering concept design will be presented.

Item type: Book Section
ID code: 36280
Keywords: light Detection And Ranging (LiDAR), photochemical Reflectance Index (PRI), Normalised Difference Vegetation (NDVI), canopy, Above Ground Biomass (AGB), cabon stock, Gross Primary Productivity (GPP), Mechanical engineering and machinery, Motor vehicles. Aeronautics. Astronautics, Aerospace Engineering, Computational Mechanics, Electrochemistry
Subjects: Technology > Mechanical engineering and machinery
Technology > Motor vehicles. Aeronautics. Astronautics
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Technology and Innovation Centre > Advanced Engineering and Manufacturing
Depositing user: Pure Administrator
Date Deposited: 01 Dec 2011 10:26
Last modified: 23 Jul 2015 13:49
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