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Measuring and comparing in-situ CO2 and CO profiles with satellite observations and model data

Atmospheric and Oceanic Science Letters 2019年第6期12卷 444-450页

作者： YI You LIU Yi cai zhaonan FANG Shuangxi YANG Dongxu WANG Yong LIANG Miao YAO Bo MA Qianli WANG Maohua Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina College of Earth and Planetary Science University of Chinese Academy of SciencesBeijingChina Shanghai Advanced Research Institute Chinese Academy of SciencesShanghaiChina Meteorological Observation Centre China Meteorological AdministrationBeijingChina Zhejiang Lin’an Regional Atmosphere Watch Station ZhejiangChina

Accurate measurements of the vertical distribution of carbon dioxide(CO2)in the atmosphere are critical to validate the vertical columns recorded by satellite and ground-based spectrometers and to estimate sources and sinks of *** work describes an in-situ air-sampler system(Aircore).Profiles of CO2 and carbon monoxide(CO)were retrieved from two soundings of this system in Xilin Hot on 13 and 14 June 2018,and compared with observations from the Tropospheric Monitoring Instrument(TROPOMI),Orbiting Carbon Observatory-2(OCO-2),and Copernicus Atmosphere Monitoring Service(CAMS).The column-averaged mixing ratio of CO(XCO)monitored by TROPOMI agreed well with that calculated from the in-situ CO pro le,with a small mean diffierence of 5±1.89 *** column-averaged mixing ratio of CO2(XCO2)monitored by OCO-2 also agreed well with that calculated from the in-situ CO2 profile,with a slight bias of 0.4±0.6 *** OCO-2 a posteriori profile had an obvious bias compared with the in-situ CO2 pro le on 13 June,with an underestimation between 600 hPa and 250 hPa and an overestimation below 600 *** also had the same bias compared with the in-situ CO profile;however,CAMS agreed well with the in-situ CO profile on 14 June in the troposphere because a weak cold vortex passed Xilin Hot on 13 June and disappeared on 14 *** the stratosphere,there were significant biases in the vertical *** striking agreement between the column-averaged mixing ratios and the diffierences in the vertical distribution suggests new exciting applications for the profile product.

关键词： Aircore greenhouse gas profile

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A New TanSat XCO2 Global Product towards Climate Studies

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Advances in Atmospheric Sciences 2021年第1期38卷 8-11页

作者： Dongxu YANG Yi LIU Hartmut BOESCH Lu YAO Antonio DI NOIA zhaonan cai Naimeng LU Daren LYU Maohua WANG Jing WANG Zengshan YIN Yuquan ZHENG Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Earth Observation Science School of Physics and AstronomyUniversity of LeicesterLeicestershire LE17RHUK National Centre for Earth Observation University of LeicesterLeicestershire LE17RHUK National Satellite Meteorological Center China Meteorological Administration Beijing 100081China Shanghai Engineering Center for Microsatellites Shanghai 201210China Changchun Institute of Optics Fine Mechanics and PhysicsChangchun 130033China

The 1st Chinese carbon dioxide(CO2)monitoring satellite mission,TanSat,was launched in *** 1st TanSat global map of CO2 dry-air mixing ratio(XCO2)measurements over land was released as version 1 data product with an accuracy of 2.11 ppmv(parts per million by volume).In this paper,we introduce a new(version 2)TanSat global XCO2 product that is approached by the Institute of Atmospheric Physics Carbon dioxide retrieval Algorithm for Satellite remote sensing(IAPCAS),and the European Space Agency(ESA)Climate Change Initiative plus(CCI+)TanSat XCO2 product by University of Leicester Full Physics(UoL-FP)retrieval *** correction of the measurement spectrum improves the accuracy(−0.08 ppmv)and precision(1.47 ppmv)of the new retrieval,which provides opportunity for further application in global carbon flux studies in the ***-comparison between the two retrievals indicates a good agreement,with a standard deviation of 1.28 ppmv and a bias of−0.35 ppmv.

关键词： TanSat CO2 remote sensing carbon flux climate change

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A New Global Solar-induced Chlorophyll Fluorescence(SIF)Data Product from TanSat Measurements

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Advances in Atmospheric Sciences 2021年第3期38卷 341-345页

作者： Lu YAO Dongxu YANG Yi LIU Jing WANG Liangyun LIU Shanshan DU zhaonan cai Naimeng LU Daren LYU Maohua WANG Zengshan YIN Yuquan ZHENG Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100094China National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081China Changchun Institute of Optics Fine Mechanics and PhysicsChangchun 130033China Shanghai Engineering Center for Microsatellites Shanghai 201210China

The Chinese Carbon Dioxide Observation Satellite Mission(TanSat)is the third satellite for global CO2 monitoring and is capable of detecting weak solar-induced chlorophyll fluorescence(SIF)signals with its advanced technical *** on the Institute of Atmospheric Physics Carbon Dioxide Retrieval Algorithm for Satellite Remote Sensing(IAPCAS)platform,we successfully retrieved the TanSat global SIF product spanning the period of March 2017 to February 2018 with a physically based *** paper introduces the new TanSat SIF dataset and shows the global seasonal SIF maps.A brief comparison between the IAPCAS TanSat SIF product and the data-driven SVD(singular value decomposition)SIF product is also performed for follow-up algorithm *** comparative results show that there are regional biases between the two SIF datasets and the linear correlations between them are above 0.73 for all *** future SIF data product applications and requirements for SIF space observation are discussed.

关键词： TanSat solar-induced chlorophyll fluorescence retrieval algorithm remote sensing

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TanSat Mission Achievements： from Scientific Driving to Preliminary Observations

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空间科学学报 2018年第5期38卷 627-639页

作者： LIU Yi WANG Jing YAO Lu CHEN Xi cai zhaonan YANG Dongxu YIN Zengshan GU Songyan TIAN Longfei LU Naimeng L Daren Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 University of Chinese Academy of Sciences Beijing 100190 Shanghai Engineering Center for Microsatellites Shanghai 201203 National Satellite Meteorological Center

The Chinese global carbon dioxide monitoring satellite(TanSat)was successfully launched in December 2016 and has completed its on-orbit tests and *** aims to measure the atmospheric Carbon Dioxide column-averaged dry air mole fractions(X_(CO_2))with a precision of 4 ppm at the regional scale,and further to derive the CO_2 global and regional *** toward these objectives is reviewed and the first scientific results from TanSat measurements are *** the design phase,Observation System Simulation Experiments(OSSE)on TanSat measurements performed prior to launch measurements using a nadir and a glint alternative mode when considering the balance of stable measurements and reduces the flux uncertainty(64%).The constellation measurements of two satellites indicate an extra 10%improvement in flux inversion if the satellite measurements have no bias and similar *** TanSat on-orbit test indicates that the instrument is stable and beginning to produce X_(CO_2)*** preliminary TanSat measurements have been validated with Total Carbon Column Observing Network(TCCON)measurements and have inter-compared with OCO-2 measurements in an overlap measurement.

关键词：科学开车二氧化碳监视卫星干燥空气设计阶段地区性 ppm

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Satellite UV-Vis spectroscopy:implications for air quality trends and their driving forces in China during 2005-2017

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Light(Science & Applications) 2019年第1期8卷 246-257页

作者： Chengxin Zhang Cheng Liu Qihou Hu zhaonan cai Wenjing Su Congzi Xia Yizhi Zhu Siwen Wang Jianguo Liu School of Earth and Space Sciences University of Science and Technology of China230026 HefeiChina Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China230026 HefeiChina Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsChinese Academy of Sciences230031 HefeiChina Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of Sciences361021 XiamenChina Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of China230026 HefeiChina Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of Sciences100029 BeijingChina Multiphase Chemistry Department Max Planck Institute for Chemistry55128 MainzGermany

Abundances of a range of air pollutants can be inferred from satellite UV-Vis spectroscopy measurements by using the unique absorption signatures of gas ***,we implemented several spectral fitting methods to retrieve tropospheric NO_(2),SO_(2),and HCHO from the ozone monitoring instrument(OMI),with radiative simulations providing necessary information on the interactions of scattered solar light within the *** analyzed the spatial distribution and temporal trends of satellite-observed air pollutants over eastern China during 2005-2017,especially in heavily polluted *** found significant decreasing trends in NO_(2) and SO_(2) since 2011 over most regions,despite varying temporal features and turning *** contrast,an overall increasing trend was identified for tropospheric HCHO over these regions in recent ***,generalized additive models were implemented to understand the driving forces of air quality trends in China and assess the effectiveness of emission *** results indicated that although meteorological parameters,such as wind,water vapor,solar radiation and temperature,mainly dominated the day-to-day and seasonal fluctuations in air pollutants,anthropogenic emissions played a unique role in the long-term variation in the ambient concentrations of NO_(2),SO_(2),and HCHO in the past 13 ***,recent declines in NO_(2) and SO_(2) could be attributed to emission reductions due to effective air quality policies,and the opposite trends in HCHO may urge the need to control anthropogenic volatile organic compound(VOC)emissions.

关键词： driving forces spectroscopy

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A multi-location joint field observation of the stratosphere and troposphere over the Tibetan Plateau

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Earth and Planetary Physics 2019年第2期3卷 87-92页

作者： JinQiang Zhang Yi Liu HongBin Chen zhaonan cai ZhiXuan Bai LingKun Ran Tao Luo Jing Yang YiNan Wang YueJian Xuan YinBo Huang XiaoQing Wu JianChun Bian DaRen Lu Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology University of Chinese Academy of Sciences Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics Chinese Academy of Sciences Key Laboratory of Atmospheric Optics Anhui institute of optics and Fine Mechanics Chinese Academy of Science Science Island Branch of Graduate School University of Science and Technology of China

The unique geographical location and high altitude of the Tibetan Plateau can greatly influence regional weather and *** particular, the Asian summer monsoon(ASM) anticyclone circulation system over the Tibetan Plateau is recognized to be a significant transport pathway for water vapor and pollutants to enter the stratosphere. To improve understanding of these physical processes, a multi-location joint atmospheric experiment was performed over the Tibetan Plateau from late July to August in 2018, funded by the fiveyear(2018–2022) STEAM(stratosphere and troposphere exchange experiment during ASM) project, during which multiple platforms/instruments—including long-duration stratospheric balloons, dropsondes, unmanned aerial vehicles, special sounding systems, and ground-based and satellite-borne instruments—will be deployed. These complementary methods of data acquisition are expected to provide comprehensive atmospheric parameters(aerosol, ozone, water vapor, CO_2, CH_4, CO, temperature, pressure,turbulence, radiation, lightning and wind); the richness of this approach is expected to advance our comprehension of key mechanisms associated with thermal, dynamical, radiative, and chemical transports over the Tibetan Plateau during ASM activity.

关键词： Tibetan Plateau Asian summer monsoon stratosphere and troposphere exchange

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短波红外CO2反演辐射传输模式综述

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遥感技术与应用 2015年第5期30卷 825-834页

作者：陈曦刘毅蔡兆男中国科学院大气物理研究所中层大气与全球环境探测重点实验室北京100029 中国科学院大学北京100049

高精度的辐射传输计算是保证短波红外卫星遥感反演CO2精度的重要因素之一。地球大气散射辐射一般是偏振的,传统的标量辐射传输模式计算精度无法满足需求;特别是针对美国OCO-2(Orbiting Carbon Observatory-2)、中国TanSat(全球二氧化碳... 详细信息

高精度的辐射传输计算是保证短波红外卫星遥感反演CO2精度的重要因素之一。地球大气散射辐射一般是偏振的,传统的标量辐射传输模式计算精度无法满足需求;特别是针对美国OCO-2(Orbiting Carbon Observatory-2)、中国TanSat(全球二氧化碳监测科学实验卫星)等跟踪主平面仪器,矢量的辐射传输模式更为必要。在二氧化碳监测卫星的目标模式下,卫星观测角度变化较大,平行平面大气假设不再适用,需要采用伪球面近似以提高精度。本文对适用短波红外CO2反演的辐射传输模式进行总结。首先介绍了基于不同辐射传输方程数值解法的多种辐射传输模式发展概况。针对CO2反演对权重函数的需求,线性化模式可以提供解析权重函数和更为稳定高效的计算方案。接着,简要总结各种线性化矢量辐射传输模式,并进一步分析比较几种CO2反演中常用矢量模式的异同。最后,讨论CO2高精度反演对模式速度的需求和加速优化计算的必要性,对辐射传输加速算法研究现状进行总结。

关键词：大气遥感辐射传输模式 CO2 反演偏振

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温室气体的卫星遥感——进展与趋势

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遥感学报 2021年第1期25卷 53-64页

作者：刘毅王婧车轲蔡兆男杨东旭吴林中国科学院大气物理研究所中层大气与全球环境探测重点实验室北京100029 中国科学院大学北京100049 中国科学院上海高等研究院上海201210 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室北京100029

二氧化碳和甲烷减排是控制全球增温最核心的手段,传统的人为碳排放计算主要依赖于在线监测和清单算法,2019年第49届IPCC全会明确了利用大气观测通过"自上而下"通量计算对排放清单进行支撑和验证,因此了解大气遥感碳监测发展趋势以及同... 详细信息

二氧化碳和甲烷减排是控制全球增温最核心的手段,传统的人为碳排放计算主要依赖于在线监测和清单算法,2019年第49届IPCC全会明确了利用大气观测通过"自上而下"通量计算对排放清单进行支撑和验证,因此了解大气遥感碳监测发展趋势以及同化反演技术方法成为了中国应对国际气候变化事务亟待探明的重要问题。根据卫星遥感技术发展进程和监测需求,将碳监测遥感的发展划分为3个阶段(1999年—2008年,2009年—2019年,2019年—),前两个阶段和第三阶段对应卫星分别为第一代和第二代温室气体监测卫星。本文在分析日本、美国、欧洲和中国第一代段碳监测卫星遥感探测技术发展进程的基础上,重点介绍了第二代卫星遥感探测技术的创新及其在探测精度、分辨率和覆盖率等方面提升。为了满足全球和区域人为碳排放监测的重大需求,需要优化反演算法提高精度、科学规划卫星的组网观测提升监测效率。同时也进一步阐述了如何依据组网观测的全球高精度、高时空分辨率的卫星数据,利用"自上而下"数据同化方法获得独立源汇信息来补充和验证清单。最后,指出了卫星高光谱遥感和新一代碳监测卫星的未来发展趋势及估算人为碳排放的潜力。

关键词：卫星遥感温室气体碳源汇 MRV 卫星组网

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基于GOSAT反演的中国地区二氧化碳浓度时空分布研究

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大气科学 2016年第3期40卷 541-550页

作者：杨东旭刘毅蔡兆男邓剑波中国科学院大气物理研究所中层大气与全球环境探测重点实验室北京100029 湖南省气象科学研究所长沙410118

卫星遥感监测大气二氧化碳柱平均干空气体积混合比(XCO2)是实现碳源汇全球监测的最有效手段,本文对国际上4种应用GOSAT卫星观测的短波红外反演算法进行了介绍和结果分析。首先对于4种反演产品的有效数据量的分析表明:现有单一反演产品... 详细信息

卫星遥感监测大气二氧化碳柱平均干空气体积混合比(XCO2)是实现碳源汇全球监测的最有效手段,本文对国际上4种应用GOSAT卫星观测的短波红外反演算法进行了介绍和结果分析。首先对于4种反演产品的有效数据量的分析表明:现有单一反演产品还不足以支撑XCO2时空分布研究。其次利用集合平均方法,综合使用4种反演产品研究了2010年中国地区XCO2时空分布特征,结果表明:XCO2呈现显著的地理分布和季节变化,不同地区季节变化趋势基本一致,均在春季达到最高值、夏季达到最低值,多数地区全年高于380 ppm(×10-6);在地理分布上,东部和西部地区存在较明显的差异,东部地区人口密集、工农业生产等人为活动旺盛,周边多被森林和草地覆盖,碳源汇强度大,因此XCO2季节变化幅度较大,全年约8 ppm;中、西部地区受人类活动影响较少,植被覆盖稀疏,XCO2全年变化仅5 ppm。

关键词： GOSAT反演算法 CO2时空分布中国地区

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利用GOME-2卫星数据反演对流层臭氧

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遥感技术与应用 2016年第2期31卷 316-323页

作者：王飞刘毅蔡兆男刘传熙中国科学院大气物理研究所中层大气与全球环境探测开放实验室北京100029 中国科学院大学北京100049

基于GOME-2level 1B数据利用最优估计反演算法获得了GOME-2臭氧廓线产品,分析了GOME-2对流层臭氧反演产品的误差和信息量等特征,并对比验证了紫外光谱仪GOME-2与热红外光谱仪TES反演的对流层臭氧柱总量及其敏感性。结果表明：GOME-2对... 详细信息

基于GOME-2level 1B数据利用最优估计反演算法获得了GOME-2臭氧廓线产品,分析了GOME-2对流层臭氧反演产品的误差和信息量等特征,并对比验证了紫外光谱仪GOME-2与热红外光谱仪TES反演的对流层臭氧柱总量及其敏感性。结果表明：GOME-2对流层臭氧柱总量反演随机误差在10%以内;GOME-2相对TES的对流层臭氧柱总量偏小5%~20%;晴空下GOME-2对流层臭氧反演的敏感性随高度增加而上升,接近TES的敏感性垂直分布;在有云条件下,GOME-2和TES的云下部分信号都被屏蔽,在云顶之上GOME-2臭氧反演敏感性明显高于热红外仪器TES。

关键词：对流层臭氧 GOME-2 反演敏感性 TES

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