A new approach on TanSat XCO2retrieval: validationagainst TCCON and first global products
Abstract
The first scientific experimental CO2satellite of China - Chinese carbon dioxide observation satellite (TanSat) was launched in 22 Dec, 2016. After on-broad test and calibration, TanSat has been measuring the backscattered sunlight in scientific earth observation mode and produces XCO2data for more than two years since then.
The inter-comparison studies with different retrieval algorithms provide a valuable experiment and help to improvement on TanSat data retrieval and results accuracy. we have applied three retrieval algorithms to approach the XCO2from TanSat hyperspectral measurements, IAPCAS from Institute of Atmospheric Physics Carbon dioxide retrieval Algorithm for Satellite remote sensing (IAPCAS), UoL-FP from The University of Leicester 'full physical'algorithm (UoL-FP/TanSat), and RemoTeC algorithm (RemoTeC/TanSat). A series of novel approach on TanSat spectrum correction has been developed and applied to improve the fitting toward a high accurate TanSat XCO2retrieval. The retrieval accuracy and precision from different algorithms, have been investigated by verifying them against measurement from 20 TCCON sites. The methods used in this study and results can help to improve the XCO2retrieval from TanSat and subsequently the level-2 products. The solar induced chlorophyll fluorescence (SIF) is approached from clear solar lines from TanSat spectrum and the retrievals indicate the seasonal variations of vegetation growth. The new TanSat global Level 2 products will be introduced and the preliminary analyses and validation have demonstrated the potential applicability of TanSat observation.- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.A43R3138L
- Keywords:
-
- 0315 Biosphere/atmosphere interactions;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3360 Remote sensing;
- ATMOSPHERIC PROCESSES;
- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCES;
- 0428 Carbon cycling;
- BIOGEOSCIENCES