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Journal of Spectroscopy
Volume 2014, Article ID 425753, 8 pages
http://dx.doi.org/10.1155/2014/425753
Review Article

Remote Sensing of CO2 Absorption by Saline-Alkali Soils: Potentials and Constraints

1State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2University of Chinese Academy of Sciences, Beijing 100093, China
3College of Computer and Information Engineering, Xinjiang Agricultural University, Urumqi 830052, China

Received 6 March 2014; Accepted 29 March 2014; Published 17 April 2014

Academic Editor: Qingrui Zhang

Copyright © 2014 Wenfeng Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

CO2 absorption by saline-alkali soils was recently demonstrated in the measurements of soil respiration fluxes in arid and semiarid ecosystems and hypothetically contributed to the long-thought “missing carbon sink.” This paper is aimed to develop the preliminary theory and methodology for the quantitative analysis of CO2 absorption by saline-alkali soils on regional and global scales. Both the technological progress of multispectral remote sensing over the past decades and the conjectures of mechanisms and controls of CO2 absorption by saline-alkali soils are advantageous for remote sensing of such absorption. At the end of this paper, the scheme for remote sensing is presented and some unresolved issues related to the scheme are also proposed for further investigations.