First satellite observation of total column water vapor from the Chinese Environmental Trace Gases Monitoring Instrument
文献类型：期刊论文
| 作者 | Zhao, Ran4; Zhang, Chengxin5; Su, Wenjing1; Ye, Jin4; Li, Ziwei3; Liu, Cheng2,3,5 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2024-09-30 |
| 关键词 | Water vapor UV-Vis sensor Trace gas Remote sensing Atmospheric composition |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-023-1418-8 |
| 通讯作者 | Zhang, Chengxin(zcx2011@ustc.edu.cn) ; Liu, Cheng(chliu81@ustc.edu.cn) |
| 英文摘要 | Atmospheric water vapor is a critical component of the Earth's water cycle and has significant impacts on weather, climate, and atmospheric chemistry. However, deficiencies remain in the coverage and accuracy of water vapor monitoring. In this study, we first retrieved the total column water vapor (TCWV) in the visible blue spectral band from two Chinese satellite UV-Vis spectrometers, the Environmental Trace Gases Monitoring Instruments (EMIs), which are onboard the Chinese GaoFen-5 (GF-5, since May 2018) and GaoFen-5B (GF-5B, since September 2021) satellites. Nevertheless, limited by factors such as the relatively lower spectral signal-to-noise ratio and weak absorption of water vapor, the accurate retrieval of TCWV from the EMI spectrum is rather challenging. Therefore, we improved the baseline TCWV retrieval based on the differential optical absorption technique, including the re-calibration of the on-orbit spectra, optimization of the spectral fitting, and bias correction in the fitted result. Sensitivity tests show that the mean retrieval TCWV error of the EMI decreased by 1.47 kg m-2 compared to that using uncalibrated spectra. The improved spectral fitting significantly reduced the relative uncertainty of the water vapor slant column densities (SCD) by 13.42%, and increased the number of successful fits by 11.64%. The improved EMI TCWV retrieval results from both the GF-5 and GF-5B satellites show a trend consistent with the TROPOspheric Monitoring Instrument (TROPOMI) satellite observations, with a correlation coefficient (R) of 0.98 and a mean bias of 1.04 kg m-2 (6.88%). Ground-based validations showed that the correlation between the EMI TCWV retrievals from the GF-5B satellite (R=0.91) and sun photometer measurements was significantly higher than that from the GF-5 satellite (R=0.87), which may have been due to the improved performance of the EMI instrument on the GF-5B satellite. Finally, we showed that an intense atmospheric river event could be successfully captured by EMI TCWV measurements, which could support the monitoring and forecasting of global weather and climate. Our results demonstrate the feasibility of the proposed TCWV retrieval algorithm for EMI instruments and their follow-on satellite sensors and contribute to the generation of a globally stable and consistent TCWV dataset with morning and afternoon overpass measurements from the blue band spectra. |
| WOS关键词 | ABSORPTION CROSS-SECTION ; SENTINEL-5 PRECURSOR ; RAMAN-SCATTERING ; PART 2 ; RETRIEVAL ; AERONET ; MISSION ; CALIBRATION ; VALIDATION ; ALGORITHM |
| 资助项目 | National Natural Science Foundation of China[42225504] ; National Natural Science Foundation of China[42375120] ; National Natural Science Foundation of China[62305322] ; National Key Research and Development Program of China[2022YFC3700100] ; Major Project of High Resolution Earth Observation System[30-Y60B01-9003-22/23] ; Fundamental Research Funds for the Central Universities[YD2090002021] ; Fundamental Research Funds for the Central Universities[WK2090000038] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001326981000001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Major Project of High Resolution Earth Observation System ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/135803]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Chengxin; Liu, Cheng |
| 作者单位 | 1.Univ Sci & Technol China, Dept Environm Sci & Engn, Hefei 230026, Peoples R China 2.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat Anhui Higher Educ, Anhui Higher Educ Inst, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 4.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 5.Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Ran,Zhang, Chengxin,Su, Wenjing,et al. First satellite observation of total column water vapor from the Chinese Environmental Trace Gases Monitoring Instrument[J]. SCIENCE CHINA-EARTH SCIENCES,2024. |
| APA | Zhao, Ran,Zhang, Chengxin,Su, Wenjing,Ye, Jin,Li, Ziwei,&Liu, Cheng.(2024).First satellite observation of total column water vapor from the Chinese Environmental Trace Gases Monitoring Instrument.SCIENCE CHINA-EARTH SCIENCES. |
| MLA | Zhao, Ran,et al."First satellite observation of total column water vapor from the Chinese Environmental Trace Gases Monitoring Instrument".SCIENCE CHINA-EARTH SCIENCES (2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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