Fast Retrieval Method of Atmospheric CO<sub>2</sub> Based on GF-5 Satellite Remote Sensing Data

Zhiqiang Sun; Xianhua Wang; Hanhan Ye; Chao Li; Yuan An; Erchang Sun; Shichao Wu; Hailiang Shi

doi:10.3788/AOS231995

Acta Optica Sinica, Volume. 44, Issue 18, 1801012(2024)

Fast Retrieval Method of Atmospheric CO₂ Based on GF-5 Satellite Remote Sensing Data

Zhiqiang Sun^1,2, Xianhua Wang², Hanhan Ye^2、*, Chao Li^2,3, Yuan An^2,3, Erchang Sun^2,3, Shichao Wu², and Hailiang Shi²

Author Affiliations

¹Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui , China

²Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui , China

³University of Science and Technology of China, Hefei 230026, Anhui , China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(9)

Fig. 1. Calculation process of atmospheric XCO₂ fast retrieval method

Download full size

Fig. 2. Absorption cross section changes caused by temperature and pressure changes in the CO₂-2 band at 2.050 μm. (a)(c) Comparison diagrams of pressure and temperature changes; (b)(d) temperature and pressure change curves corresponding to the peak and peak valley band sampling points

Download full size

Fig. 3. Aerosol optical depth profiles and Gaussian fitting results of five aerosol types

Download full size

Fig. 4. Comparison deviation diagrams of XCO₂ results between GMI original and improved retrieval algorithms. (a) Error; (b) correlation

Download full size

Fig. 5. Comparison of retrieval results between the original and improved algorithms of GMI and TCCON. (a) XCO₂; (b) error

Download full size

Table 1. GMI main instrument parameters

View table

Table 1. GMI main instrument parameters

Parameter	Technical indicator
Parameter	O₂	CO₂-1	CO₂-2
Spectral range /μm	0.759-0.769	1.568-1.583	2.043-2.058
Spectral resolution /cm^-1	0.6	0.27
Signal-to-noise ratio	300		250
Radiometric calibration	Absolute precision is 5% Relative precision is 2%

Table 2. Average interpolation error of absorption cross section table in three bands
View table
Table 2. Average interpolation error of absorption cross section table in three bands
Bandrange /cm^-1 Pressure interpolation error /% Temperature interpolation error /% Wavenumber interpolation error /%
13000-13180 0.98 0.68 0.06
6300-6400 0.51 0.89 0.02
4800-4900 0.64 0.74 0.09

Table 3. Weights of subtypes and typical relative humidity for five aerosol types

View table

Table 3. Weights of subtypes and typical relative humidity for five aerosol types

Aerosol type	Subtype	Density weight /%	Relative humidity /%
Black carbon	Hydrophilic, hydrophobic	78.4, 21.6	53.9
Sea salt	Bin 001, 002, 003, 004, 005	0.5, 3.2, 19.1, 59.9, 17.3	88.3
Organic carbon	Hydrophilic, hydrophobic	82.2, 17.8	78.4
Sulphate aerosol	SO	100	70.2
Dust	Bin 001, 002, 003, 004, 005	14.3, 41.5, 30.2, 11.3, 2.7	—

Table 4. Time comparison between the original retrieval algorithm and the improved algorithm of GMI

View table

Table 4. Time comparison between the original retrieval algorithm and the improved algorithm of GMI

Parameter	Original algorithm	Improved algorithm
Average single forward model computation time	32 min	1 min 29 s
Average single retrieval iteration computation time	35 min 20 s	1 min 56 s
Total computation time	107 min	13 min 36 s

Tools

Get Citation

Copy Citation Text

Zhiqiang Sun, Xianhua Wang, Hanhan Ye, Chao Li, Yuan An, Erchang Sun, Shichao Wu, Hailiang Shi. Fast Retrieval Method of Atmospheric CO₂ Based on GF-5 Satellite Remote Sensing Data[J]. Acta Optica Sinica, 2024, 44(18): 1801012

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: Atmospheric Optics and Oceanic Optics

Received: Dec. 27, 2023

Accepted: Mar. 4, 2024

Published Online: Sep. 11, 2024

The Author Email: Ye Hanhan (yehanhan@aiofm.ac.cn)

DOI:10.3788/AOS231995

CSTR:32393.14.AOS231995

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. GMI main instrument parameters

Table 1. GMI main instrument parameters

Table 2. Average interpolation error of absorption cross section table in three bands

Table 2. Average interpolation error of absorption cross section table in three bands

Table 3. Weights of subtypes and typical relative humidity for five aerosol types

Table 3. Weights of subtypes and typical relative humidity for five aerosol types

Table 4. Time comparison between the original retrieval algorithm and the improved algorithm of GMI

Table 4. Time comparison between the original retrieval algorithm and the improved algorithm of GMI