China Symposium on Remote Sensing最新文献_第8页

Typical disaster damage target extraction method based on object oriented classification 基于面向对象分类的典型灾害破坏目标提取方法

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910423

G. Wang, Fenfei Wang, Jiansheng Chen, Shirong Chen

引用次数: 1

Aerosol direct radiative forcing at the top of atmosphere based on satellite remote sensing over China Seas: a preliminary study 基于卫星遥感的中国海域大气顶部气溶胶直接辐射强迫的初步研究

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910433

Zengzhou Hao, D. Pan, Fang Gong

{"title":"Aerosol direct radiative forcing at the top of atmosphere based on satellite remote sensing over China Seas: a preliminary study","authors":"Zengzhou Hao, D. Pan, Fang Gong","doi":"10.1117/12.910433","DOIUrl":"https://doi.org/10.1117/12.910433","url":null,"abstract":"Radiative forcing as an index of climate change can reflect the relative effect of climate factors. To understand climatic implications of aerosols over the China Seas, the aerosol direct radiative forcing at the top of atmosphere (TOA) is computed using three-year collocated Clouds and the Earth's Radiant Energy System (CERES) radiation fluxes and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical thickness data on the platform Terra. The upward radiation flux for clear skies is a key for the aerosol radiative forcing at the TOA. A linear relationship is found between the solar radiation fluxes at the TOA from CERES and the aerosol optical thickness is at 550 nm from MODIS over the China Seas. In a linear regression Eq., the intercept for zero aerosol optical thickness is the radiation flux at the TOA for clear skies. Based on the definition of the aerosol direct radiative forcing at TOA and the diurnal correction factor from a simulated radiative forcing using radiation transfer model, the daily averaged aerosol direct radiative forcing at the TOA is estimated and its seasonal variations over the cloud-free China Seas are presented. In total, the aerosol radiative forcing over the China Seas is negative. It implies that the aerosol over the China Seas is mainly a cooling effect on climate change, which is opposite to the greenhouse effect. The largest aerosol radiative forcing is found in spring, while the smallest is in summer. The aerosol radiative forcing over the coastal region is always more than that in the open ocean in four seasons. The method in the study can be used for evaluation of the aerosols impact on global or region climate from satellite measurements.","PeriodicalId":340728,"journal":{"name":"China Symposium on Remote Sensing","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129439565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orthoimage seamline searching based on minimizing local maximum algorithm 基于最小局部极大值算法的正射影线搜索

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910394

Can Zhong, Yiliu Yang

引用次数: 0

Space-borne hyperspectral remote sensing imagery noise eliminating based on CFFT self-adapted by optimal SNR 基于最优信噪比的CFFT自适应星载高光谱遥感图像去噪

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910400

Qingjie Liu, Qizhong Lin, Liming Wang, Qinjun Wang, Fengxian Miao

{"title":"Space-borne hyperspectral remote sensing imagery noise eliminating based on CFFT self-adapted by optimal SNR","authors":"Qingjie Liu, Qizhong Lin, Liming Wang, Qinjun Wang, Fengxian Miao","doi":"10.1117/12.910400","DOIUrl":"https://doi.org/10.1117/12.910400","url":null,"abstract":"Space-borne hyperspectral remote sensing imagery, supplying both spatial and spectral information for quantitative remote sensing monitoring, is easily polluted by noises from atmosphere, terrain etc. Based on spectral continuum removing and recovering, traditional fast Fourier Transform (FFT) was extended to Continuum Fast Fourier Transform (CFFT) to separate noise from target information in frequency domain (FD). Thus, low-pass filter for reserving useful information was designed for eliminating noise, with its cut-off frequency selected self-adaptively by optimal signal-tonoise ratio (SNR). Hyperion hyperspectral imageries of Beijing and Xinjiang China were singled out for noise removing to validate the filtering ability of the Continuum Fast Fourier Transform self-adapted by Optimal Signal-noise Ratio(CFFTOSNR) method with qualitative description and quantificational indexs, including mean, variance, entropy, definition and SNR etc. Experiment result shows that CFFTOSNR does well in reducing the gauss white noises in spectral domain and stripe and band-subtracting noise in spatial domain respectively, while the quantificational indexs of filtered imagery are all improved, with entropy of post-processed image obviously increased by 5 db.","PeriodicalId":340728,"journal":{"name":"China Symposium on Remote Sensing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129444301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerosol optical depth retrieval over land using FY-3A data and its application in dust monitoring 利用 FY-3A 数据进行陆地气溶胶光学深度检索及其在尘埃监测中的应用

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910398

L. Mei, Yong Xue, J. Guang, Yingjie Li, Ying Wang, Hui Xu, Xingwei He, Shuzheng Jiang, Xijuan Jiao, Ziqiang Chen, Jianwen Ai

{"title":"Aerosol optical depth retrieval over land using FY-3A data and its application in dust monitoring","authors":"L. Mei, Yong Xue, J. Guang, Yingjie Li, Ying Wang, Hui Xu, Xingwei He, Shuzheng Jiang, Xijuan Jiao, Ziqiang Chen, Jianwen Ai","doi":"10.1117/12.910398","DOIUrl":"https://doi.org/10.1117/12.910398","url":null,"abstract":"The accuracy of aerosol optical depth (AOD) products from polar-orbit satellites such as FengYun-3A (FY3A) is limited, especially over land because it is hard to discriminate the contribution of the observed signal reflected by the surface from the one scattered and absorbed by the aerosols over bright surface. In this paper, an approach by exploiting the synergy of FengYun-3A (FY-3A) and Moderate Resolution Imaging Spectroradiometer (MODIS) data were presented. The derived AOD compared to Aerosol Robotic Network (AERONET) observation and retrieval absolute error around 0.1 is found, with R2 of 0.77. Moreover, a dust episode was presented in Mongolia on late March, 2010.; By using HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) mode as well as the meteorological parameters, we analyzed the advection and dispersion of this event, its transport effect for the episode and its influence. Our data demonstrated that AOD increased up to 2.0 during the burning phase and then returned to normal values (0.2- 0.5), and the aerosol properties various, including both the AOD and aerosol type or source, which has a vertical distribution difference, fully in line with transport process. This method should be wildly used on FY series satellite.","PeriodicalId":340728,"journal":{"name":"China Symposium on Remote Sensing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127785679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Analysis of the ancient river system in Loulan period in Lop Nur region 罗布泊地区楼兰期古水系分析

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910420

Jianfeng Zhu, Peng Jia, Yueping Nie

引用次数: 3

Application of ATOVS radiance assimilation to numerical simulation of a mesoscale heavy rainfall ATOVS辐射同化在一次中尺度暴雨数值模拟中的应用

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910435

H. Bing, Bai Jie, Li Wei, Xiaoting Wang

引用次数: 0

Risk evaluation of available phosphorus loss in agricultural land based on remote sensing and GIS 基于遥感和GIS的农用地有效磷流失风险评价

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910428

Xiaodong Ding, Bin Zhou, Junfeng Xu, Ting Liu, Bin Xie

{"title":"Risk evaluation of available phosphorus loss in agricultural land based on remote sensing and GIS","authors":"Xiaodong Ding, Bin Zhou, Junfeng Xu, Ting Liu, Bin Xie","doi":"10.1117/12.910428","DOIUrl":"https://doi.org/10.1117/12.910428","url":null,"abstract":"The surplus of phosphorus leads to water eutrophication. Huge input of fertilizers in agricultural activities enriches nutrition in soil. The superfluous nutrient moves easily to riparian water by rainfall and surface runoff; leads to water eutrophication of riparian wetlands and downstream water; and consequently affects ecological balance. Thus it is significant to investigate the risk of phosphorus loss in agricultural land, to identify high concentration areas and guide the management of nutrition loss. This study was implemented mainly in the area of agricultural use in southern Western Australia, where a three-year period preliminary monitoring of water quality showed that the concentration of different forms of phosphorus in water had far exceeded the standard. Due to the large scale surface runoff caused by occasional storms in Western Australia, soil erosion was selected as the main driving factor for the loss of phosphorus. Remote sensing and ground truth data were used to reflect the seasonal changes of plants. The spatial distribution of available phosphorus was then predicted and combined with the evaluation matrix to evaluate the loss risk of phosphorus. This evaluation was based on quantitative rather than qualitative data to make better precision. It could help making decision support for monitoring water quality of rivers and riparian wetlands.","PeriodicalId":340728,"journal":{"name":"China Symposium on Remote Sensing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117326798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Drought monitoring in Yunnan province with AMSR-E-based data 基于amsr数据的云南省干旱监测

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910419

Shu Wang, Ruofei Zhong, Qin Li, Mengli Qin

引用次数: 5

Assessment on aerosol direct radiative forcing over China land areas based on satellite data 基于卫星资料的中国陆地气溶胶直接辐射强迫评估

China Symposium on Remote Sensing Pub Date : 2010-09-14 DOI: 10.1117/12.910427

Lin Chen, G. Shi, Biao Wang, Peng Zhang

{"title":"Assessment on aerosol direct radiative forcing over China land areas based on satellite data","authors":"Lin Chen, G. Shi, Biao Wang, Peng Zhang","doi":"10.1117/12.910427","DOIUrl":"https://doi.org/10.1117/12.910427","url":null,"abstract":"Detailed data of spatial and temporal distribution and radiative properties of aerosols are required for assessment on aerosol direct radiative forcing. In recent years, with the development of remote sensing instruments as well as corresponding sophisticated inversion algorithms, the global aerosol distribution can be acquired by satellite remote sensing. The aerosol optical depth in the areas with high surface albedo can be inversed by the latest MODIS deep blue algorithm with good complementarity to the applicable areas with traditional dark target inversion scheme. Based on both algorithms, the distribution of aerosol optical depth over land areas of China in 2005 was provided, with an averaged value 0.31. Moreover, the aerosol optical depths are high in spring and summer while low value in autumn and winter, and greatly different in different areas. In addition, the surface albedo data inversed by MODIS and MISR were coupled into the self-developed radiative model,called RAD01. The aerosol direct radiative forcing at the top of atmosphere (TOA), on the surface and in the atmosphere over land areas of China were calculated as -7±2Wm-2, -21.9 ±6.4Wm-2 and 4.9±4.3Wm-2 respectively. Due to the strong absorptivity of aerosols over land areas of China, the aerosol radiative forcing on the surface was three times larger than that at TOA, with a strong heating effect on the atmosphere.","PeriodicalId":340728,"journal":{"name":"China Symposium on Remote Sensing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115110356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2