检索结果-南通市图书馆

Toward Establishing a Low-cost UAV Coordinated Carbon Observation Network(LUCCN):First Integrated Campaign in China

Advances in Atmospheric Sciences 2024年第1期41卷 1-7页

作者： Dongxu YANG Tonghui ZHAO Lu YAO Dong GUO Meng FAN Xiaoyu REN Mingge LI Kai WU Jing WANG zhaonan cai Sisi WANG Jiaxu GUO Liangfu CHEN Yi LIU Carbon Neutrality Research Center(CNRC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Middle Atmospheric Physics and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101China National Remote Sensing Center of China Beijing 100036China The Administrative Center for China’s Agenda 21 Beijing 100862China

In this study,we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network(LUCCN)*** LUCCN primarily consists of two categories of instruments,including ground-based and UAV-based in-situ *** use the GMP343,a low-cost non-dispersive infrared sensor,in both ground-based and UAV-based *** first integrated measurement campaign took place in Shenzhen,China,4 May *** the campaign,we found that LUCCN’s UAV component presented significant data-collecting advantages over its ground-based counterpart owing to the relatively high altitudes of the point emission sources,which was especially obvious at a gas power plant in *** emission flux was calculated by a crosssectional flux(CSF)method,the results of which differed from the Open-Data Inventory for Anthropogenic Carbon dioxide(ODIAC).The CSF result was slightly larger than others because of the low sampling rate of the whole emission cross *** LUCCN system will be applied in future carbon monitoring campaigns to increase the spatiotemporal coverage of carbon emission information,especially in scenarios involving the detection of smaller-scale,rapidly varying sources and sinks.

关键词： CO_(2) measurement networks power station carbon emission cross-sectional flux method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

甲烷柱浓度红外高光谱遥感反演与验证

引用

遥感学报 2024年第8期28卷 1968-1985页

作者：周敏强倪启晨王佳欣蔡兆男南卫东王普才中国科学院大气物理研究所碳中和研究中心北京100029 中国科学院大学地球与行星科学学院北京100049 中国科学院大气物理研究所香河大气综合观测试验站廊坊065400

甲烷(CH_(4))浓度变化是当前气候变化研究中的一个焦点问题。红外高光谱遥感技术已经成为探测大气CH_(4)浓度变化的重要技术手段。本文针对红外高光谱CH_(4)地基遥感反演技术,介绍了国际上重要的观测网络,包括TCCON(Total Carbon Column... 详细信息

甲烷(CH_(4))浓度变化是当前气候变化研究中的一个焦点问题。红外高光谱遥感技术已经成为探测大气CH_(4)浓度变化的重要技术手段。本文针对红外高光谱CH_(4)地基遥感反演技术,介绍了国际上重要的观测网络,包括TCCON(Total Carbon Column Observing Network),NDACC-IRWG(Network for the Detection of Atmospheric Composition Change-the Infrared Working Group)和COCCON(COllaborative Carbon Column Observing Network),讨论了这些观测网络的主要特点,包括观测仪器、波段设置、反演算法、产品特性等。针对红外高光谱CH_(4)浓度卫星遥感反演,概述了国际上的CH_(4)卫星遥感发展现状。同时,以日本GOSAT(Greenhouse gases Observing SATellite)卫星为例,探讨了卫星CH_(4)遥感地基验证工作中的关键技术,阐明了地基遥感对于卫星CH_(4)遥感产品改进的重要性。最后,利用TCCON香河站的观测资料,对最新版的TROPOMI(TROPOspheric Monitoring Instrument)卫星CH_(4)观测反演数据产品进行了地基验证,表明在华北地区TROPOMI CH_(4)柱浓度产品达到了其观测精度目标设定要求;TROPOMI观测得到的CH_(4)柱浓度年增长率要略高于TCCON的观测结果,两者相差0.263±0.172%/a;地基与卫星的差值具有季节变化特征,春季卫星的观测值大于TCCON观测值约0.3%,秋季卫星的观测值小于TCCON观测值约0.2%。

关键词：遥感甲烷柱浓度地基傅里叶光谱卫星验证 TROPOMI

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of XCO_2 retrieval sensitivity using simulated Chinese Carbon Satellite(TanSat) measurements

引用

Science China Earth Sciences 2014年第8期57卷 1919-1928页

作者： cai zhaonan LIU Yi YANG DongXu Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of Sciences

We present a study on the retrieval sensitivity of the column-averaged dry-air mole fraction of CO2(XCO2) for the Chinese carbon dioxide observation satellite(TanSat) with a full physical forward model and the optimal estimation technique. The forward model is based on the vector linearized discrete ordinate radiative transfer model(VLIDORT) and considers surface reflectance, gas absorption, and the scattering of air molecules, aerosol particles, and cloud particles. XCO2 retrieval errors from synthetic TanSat measurements show solar zenith angle(SZA), albedo dependence with values varying from 0.3 to 1 ppm for bright land surface in nadir mode and 2 to 8 ppm for dark surfaces like snow. The use of glint mode over dark oceans significantly improves the CO2 information retrieved. The aerosol type and profile are more important than the aerosol optical depth, and underestimation of aerosol plume height will introduce a bias of 1.5 ppm in XCO2. The systematic errors due to radiometric calibration are also estimated using a forward model simulation approach.

关键词： TanSat retrieval sensitivity retrieval error simulation XCO2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monitoring air pollution in China from geostationary satellite： A synthetic study using simulated observations

引用

Science China Earth Sciences 2018年第11期61卷 1622-1632页

作者： Xi CHEN zhaonan cai Yi LIU Dongxu YANG Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100079 China University of Chinese Academy of Sciences Beijing 100049 China

We simulated geostationary satellite observations to assess the potential for high spatial-and temporal-resolution monitoring of air pollution in China with a focus on tropospheric ozone(O_3), nitrogen dioxide(NO_2), sulfur dioxide(SO_2), and formaldehyde(HCHO). Based on the capabilities and parameters of the payloads onboard sun-synchronous satellites, we simulated the observed spectrum based on a radiative transfer model using a geostationary satellite model. According to optimal estimation theory, we analyzed the sensitivities and retrieval uncertainties of the main parameters of the instrument for the target trace gases. Considering the retrieval error requirements of each trace gas, we determined the major instrument parameter values(e.g., observation channel, spectral resolution, and signal-to-noise ratio). To evaluate these values, retrieval simulation was performed based on the three-dimensional distribution of the atmospheric components over China using an atmospheric chemical transportation model. As many as 90% of the experiments met the retrieval requirements for all target gases. The retrieval precision of total-column and stratospheric O_3 was 2%. In addition, effective retrieval of all trace gases could be achieved at solar zenith angles larger than 70°. Therefore, the geostationary satellite observation and instrument parameters provided herein can be used in air pollution monitoring in China. This study offers a theoretical basis and simulation tool for improving the design of instruments onboard geostationary satellites.

关键词： Air pollution Geostationary satellite Instrument parameters Retrieval error

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Observations of Dynamic Turbulence in the Lower Stratosphere over Inner Mongolia Using a High-resolution Balloon Sensor Constant Temperature Anemometer

引用

Advances in Atmospheric Sciences 2022年第3期39卷 519-528页

作者： Xiaoyu REN Yi LIU zhaonan cai Yuli ZHANG Carbon Neutrality Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing 100049China

We present characterizations of the dynamic turbulence in the lower stratosphere measured by a new balloon-based system designed for detecting finer scale dynamic turbulence. The balloon-based system included a constant temperature anemometer(CTA) operating at a sampling rate of 2 k Hz at an ascent speed of 5 m s^(-1)(corresponding to a vertical resolution of 2.5 mm), an industrial personal computer, batteries, sensors for ambient temperature and humidity, an A/D converter, and others. The system was successfully launched to 24 km altitude over Bayannur City, Inner Mongolia Province. Results show the spatial intermittence of the turbulence layers, with clear boundaries between turbulent and nonturbulent regions. This is the first time that the dynamic turbulence spectrum down to the viscous sub-range has been obtained throughout the lower stratosphere over China. With that, the energy dissipation rates of dynamic turbulence could be calculated with high precision. The profile of the dissipation rates varied from 7.37 × 10^(-7) to 4.23 W kg^(-1) and increased with altitude in the stratosphere.

关键词： dynamic turbulence stratosphere balloon payload high spatial resolution dissipation rates Inner Mongolia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CH_4 retrieval from hyperspectral satellite measurements in shortwave infrared: sensitivity study and preliminary test with GOSAT data

引用

Chinese Science Bulletin 2014年第14期59卷 1499-1507页

作者： Jianbo Deng Yi Liu Dongxu Yang zhaonan cai Key Laboratory of Middle Atmosphere and Global Environmen Observation Institute of Atmospheric PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

One of the important science requirements of monitoring atmospheric methane abundances from hyperspectral measurements is to establish a highly accurate retrieval *** paper aimed to describe a retrieval algorithm based on a series of sensitivity study with an effective and accurate forward model,which was applied to realize online calculation of absorption coefficient and backscattered solar *** sensitivity study consisted of band selection,interference factors analysis,and retrieval model *** band selection analysis indicated that the 1.65 lm band(5,900–6,150 cm-1)associated with the 2.06 lm band(4,800–4,900 cm-1)retained more than 90%of the information content of CH4,CO2,and temperature,and more than 85%of that of H2O in the *** of the interference factors showed that H2O,temperature,and CO2will cause unacceptable errors if they are not *** also showed that revising temperature and H2O with a profile model is more efficient than with a temperature offset and a H2O scale factor model.A preliminarily test using the Greenhouse gases Observing SATellite Level 1B spectral data indicated that most of the retrieval errors were less than 1%,which is acceptable for methane flux estimation.

关键词：检索算法高光谱敏感性短波红外卫星测量甲烷测试正演模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection of Anthropogenic CO_(2) Emission Signatures with TanSat CO_(2) and with Copernicus Sentinel-5 Precursor(S5P)NO_(2) Measurements:First Results

引用

Advances in Atmospheric Sciences 2023年第1期40卷 1-5页

作者： Dongxu YANG Janne HAKKARAINEN Yi LIU Iolanda IALONGO zhaonan cai Johanna TAMMINEN Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Finnish Meteorological Institute Helsinki FI-00560Finland

China’s first carbon dioxide(CO_(2))measurement satellite mission,TanSat,was launched in December *** paper introduces the first attempt to detect anthropogenic CO_(2) emission signatures using CO_(2) observations from TanSat and NO_(2) measurements from the TROPOspheric Monitoring Instrument(TROPOMI)onboard the Copernicus Sentinel-5 Precursor(S5P)*** focus our analysis on two selected cases in Tangshan,China and Tokyo,*** found that the TanSat XCO_(2) measurements have the capability to capture the anthropogenic variations in the plume and have spatial patterns similar to that of the TROPOMI NO_(2) *** linear fit between TanSat XCO_(2) and TROPOMI NO_(2) indicates the CO_(2)-to-NO_(2) ratio of 0.8×10^(-16) ppm(molec cm^(-2))^(-1) in Tangshan and 2.3×10^(-16) ppm(molec cm^(-2))^(-1) in *** results align with the CO_(2)-to-NOx emission ratios obtained from the EDGAR v6 emission inventory.

关键词： TanSat CO_(2) Remote sensing city carbon emission climate change

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monitoring Carbon Dioxide from Space：Retrieval Algorithm and Flux Inversion Based on GOSAT Data and Using CarbonTracker-China

引用

Advances in Atmospheric Sciences 2017年第8期34卷 965-976页

作者： Dongxu YANG Huifang ZHANG Yi LIU Baozhang CHEN zhaonan cai Daren Lü Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China Jiangsu Center for Collaborative Innovation in Geographic Information Resource Development and Application Nanjing 210023 China

Monitoring atmospheric carbon dioxide（CO_2） from space-borne state-of-the-art hyperspectral instruments can provide a high precision global dataset to improve carbon flux estimation and reduce the uncertainty of climate projection. Here, we introduce a carbon flux inversion system for estimating carbon flux with satellite measurements under the support of ＂The Strategic Priority Research Program of the Chinese Academy of Sciences—Climate Change： Carbon Budget and Relevant Issues＂. The carbon flux inversion system is composed of two separate parts： the Institute of Atmospheric Physics Carbon Dioxide Retrieval Algorithm for Satellite Remote Sensing（IAPCAS）, and Carbon Tracker-China（CT-China）, developed at the Chinese Academy of Sciences. The Greenhouse gases Observing SATellite（GOSAT） measurements are used in the carbon flux inversion experiment. To improve the quality of the IAPCAS-GOSAT retrieval, we have developed a post-screening and bias correction method, resulting in 25%–30% of the data remaining after quality control. Based on these data, the seasonal variation of XCO_2（column-averaged CO_2dry-air mole fraction） is studied, and a strong relation with vegetation cover and population is identified. Then, the IAPCAS-GOSAT XCO_2 product is used in carbon flux estimation by CT-China. The net ecosystem CO_2 exchange is-0.34 Pg C yr^（-1）（±0.08 Pg C yr^（-1））, with a large error reduction of 84%, which is a significant improvement on the error reduction when compared with in situ-only inversion.

关键词： retrieval algorithm satellite remote sensing CO2 carbon flux GOSAT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

First Global Carbon Dioxide Maps Produced from Tan Sat Measurements

引用

Advances in Atmospheric Sciences 2018年第6期35卷 621-623页

作者： Dongxu YANG Yi LIU zhaonan cai Xi CHEN Lu YAO Daren LU Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China University of Chinese Academy of Sciences Beijing 100049 China

*** need for global carbon monitoring from space and the TanSat mission Global warming is a major problem,for which carbon dioxide（CO2 ）is the main greenhouse gas involved in heating the ***,the poor availability of... 详细信息

关键词： OCO First Global Carbon Dioxide Maps Produced from Tan Sat Measurements

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Chinese carbon cycle data-assimilation system(Tan-Tracker)

引用

Chinese Science Bulletin 2014年第14期59卷 1541-1546页

作者： Xiangjun Tian Zhenghui Xie zhaonan cai Yi Liu Yu Fu Huifang Zhang ICCES Institute of Atmospheric PhysicsChinese Academy of Sciences LASG Institute of Atmospheric PhysicsChinese Academy of Sciences LAGEO Institute of Atmospheric PhysicsChinese Academy of Sciences Climate Change Research Center (CCRC) Chinese Academy of Sciences Institute of Geographic Science and Natural Resources Research Chinese Academy of Sciences

In this study,the Chinese carbon cyle dataassimilation system Tan-Tracker is developed based on the atmospheric chemical transport model(GEOS-Chem)***-Tracker is a dual-pass data-assimilation system in which both CO2concentrations and CO2fluxes are simultaneously assimilated from atmospheric *** has several advantages,including its advanced data-assimilation method,its highly efficient computing performance,and its simultaneous assimilation of CO2concentrations and *** observing system simulation experiments demonstrate its robust performance with high assimilation precision,making full use of *** Tan-Tracker system can only assimilate in situ observations for the *** the future,we hope to extend Tan-Tracker with functions for using satellite measurements,which will form the quasioperational Chinese carbon cycle data-assimilation system.

关键词：跟踪系统数据同化碳循环中国 CO2通量大气观测二氧化碳浓度大气化学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：