Influence of Chlorophyll Fluorescence on the Retrieval Accuracy of Carbon Dioxide
JIANG Yun1,2, YE Han-han1*, WANG Xian-hua1, DUAN Feng-hua1,2, WU Hao1,2
1. Key Laboratory of Optical Calibration and Characterization Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，China
2. University of Science and Technology of China，Hefei 230026，China
Abstract：As a major error of CO2 retrieval, atmospheric scattering effect hampered the accuracy of CO2 retrieval. The stability of oxygen in the atmosphere is used in scattering correction for atmospheric CO2 inversion, such as the photon path length probability density function (PPDF) method. However, the presence of plant chlorophyll fluorescence in the light irradiation of O2 A will affect the PPDF parameter retrieval as well as the accuracy of CO2 inversion. As the vegetation fluorescence is weak, in the previous CO2 inversion did not cause enough attention. Based on the study of global vegetation fluorescence distribution, the influence of fluorescence on atmosphere CO2 column content (XCO2) was simulated and analyzed. The influence of fluorescence under the aerosol free, aerosol and surface albedo condition is simulated, the result indicates that when the aerosol is not taken into account, the fluorescence intensity increases from 0.1 to 1.8, which results in a deviation of 0.1 to 2 (10-6) for the inversion of XCO2. Inversion of XCO2 results in a deviation of 0.1 to 3 (10-6) when considering the influence of aerosol and surface reflectance. This research shows that chlorophyll fluorescence cannot be neglected in high precision CO2 inversion.
[1] LIU Yi, Lü Da-ren, CHEN Hong-bin(刘 毅，吕达仁，陈洪滨). Remote Sensing Technology and Application(遥感技术与应用)，2011，26(2)：247.
[2] Vydrov Oleg A, Heyd J, Krukau A V, et al. Journal of Chemical Physics, 2006, 125(7): 074106.
[3] Oshchepkov S, Bril A, Yokota T, et al. Journal of Geophysical Research: Atmospheres，2012，117: D12305.
[4] Funk O, Pfeilsticker K. Annales Geophysicae, 2003, 21(3): 615.
[5] Bril A, Oshchepkov S, Yokota T，et al. Journal of Quantitative Spectroscopy & Radiative Transfer, 2008, 109(10): 1815.
[6] ZOU Ming-min, CHEN Liang-fu, TAO Jin-hua, et al(邹铭敏，陈良富，陶金花，等). Science China: Earth Science(中国科学：地球科学)，2013, 43(12): 2062.
[7] JIANG Xin-hua, WANG Xian-hua, YE Han-han(江新华，王先华，叶函函，等). Acta Optica Sinic(光学学报)，2014, 34(8): 0801005.
[8] Guanter L, Alonso L, Gómez-chova L, et al. Journal of Geophysical Research, 2010, 115D19303.
[9] Sanders A F J, Haan J F D. Atmospheric Measurement Techniques, 2013, 6(10): 2725.
[10] Frankenberg C, Butz A, Toon G C，et al. Geophysical Research Letters, 2011, 38: L03801.
[11] Oshchepkov, Sergey A Bril，Yokota T. et al. Journal of Geophysical Research: Atmospheres, 2009, 114: D19207.
[12] Guanter L, Frankenberg C, Dudhia A, et al. Remote Sensing of Environment, 2012, 121(6): 236.
[13] Frankenberg C, Fisher J B, Worden J, et al. Geophysical Research Letters, 2011, 38: L17706.
