|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Estimating forest aboveground biomass using HJ-1 Satellite CCD and ICESat GLAS waveform data显示文摘The ecosystem in northeastern China and the Russian Far East is a hotspot of scientific research into the global carbon balance.Forest aboveground biomass(AGB) is an important component in the land surface carbon cycle.In this study,using forest inventory data and forest distribution data,the AGB was estimated for forest in Daxinganlin in northeastern China by combining charge-coupled device(CCD) data from the Small Satellite for Disaster and Environment Monitoring and Forecast(HJ-1) and Geoscience Laser Altimeter System(GLAS) waveform data from the Ice,Cloud and land Elevation Satellite(ICESat).The forest AGB prediction models were separately developed for different forest types in the research area at GLAS footprint level from GLAS waveform parameters and field survey plot biomass in the Changqing(CQ) Forest Center,which was calculated from forest inventory data.The resulted statistical regression models have a R2=0.68 for conifer and R2=0.71 for broadleaf forests.These models were used to estimate biomass for all GLAS footprints of forest located in the study area.All GLAS footprint biomass coupled with various spectral reflectivity parameters and vegetation indices derived from HJ-1 satellite CCD data were used in multiple regression analyses to establish biomass prediction models(R2=0.55 and R2=0.52 for needle and broadleaf respectively).Then the models were used to produce a forest AGB map for the whole study area using the HJ-1 data.Biomass data obtained from forest inventory data of the Zhuanglin(ZL) Forest Center were used as independent field measurements to validate the AGB estimated from HJ-1 CCD data(R2=0.71).About 80% of biomass samples had an error less than 20 t ha-1,and the mean error of all validation samples is 5.74 t ha-1.The pixel-level biomass map was then stratified into different biomass levels to illustrate the AGB spatial distribution pattern in this area.It was found that HJ-1 wide-swath data and GLAS waveform data can be combined to estimate forest biomass with good precision,and the biomass data can be used as input data for future carbon budget analysis. | GUO ZhiFeng1,CHI Hong1,2 & SUN GuoQing1,3 1State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China 2Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3Department of Geography University of Maryland,College Park,MD 20742,USA | 2010 | Science China Earth Sciences2010，53，S1： | 21 |
| 2 | Retrieving crop leaf area index by assimilation of MODIS data into a crop growth model显示文摘Leaf area index (LAI) is an important parameter in monitoring crop growth. One of the methods for retrieving LAI from remotely sensed observations is through inversion of canopy reflectance models. Many model inversion methods fail to account for variable LAI values at different crop growth stages. In this research, we use the crop growth model to describe the LAI changes with crop growth, and consider a priori LAI values at different crop growth stages as constraint information. The key approach of this research is to assimilate multiple canopy reflectance values observed at different growth stages and a priori LAI values into a coupled crop growth and radiative transfer model sequentially using a variational data assimilation algorithm. Adjoint method is used to minimize the cost function. Any other information source can be easily incorporated into the inversion cost function. The validation results show that the time series of MODIS canopy reflectance can greatly reduce the uncertainty of the inverted LAI values. Compared with MODIS LAI product at Changping and Shunyi Counties of Beijing, this method has significantly improved the estimated LAI temporal profile. | WANG DongWei1,2,3, WANG JinDi1,2 & LIANG ShunLin4 1 State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing Applications, CAS, Beijing 100875, China 2 School of Geography, Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing Normal University, Beijing 100875, China 3 Haihe River Water Conservancy Commission, Tianjin 300170, China 4 Department of Geography, University of Maryland, College Park, MD 20742, USA | 2010 | Science China Earth Sciences2010，53，5： | 8 |
| 3 | Improvement of a 3D radar backscattering model using matrix-doubling method显示文摘Radiative transfer models have been widely used to simulate the radar backscattering from forested areas. A three-dimensional radar backscatter model of forest canopy developed in previous studies takes full account of spatial position of trees in a forest stand, and the interactions among crown, trunk and ground surface. The model predicted well for the co-polarized backscatter measurements, but underestimated the backscattering for cross-polarization, primarily because only the first-order scattering within tree crowns was considered in the model. The backscattering at cross-polarization depends strongly on multiple scatter- ing within tree crowns. To produce good estimations for cross-polarized component, the matrix-doubling method is employed here to compute multiple-scattering within the crown. The modified model is compared with the original model, and the field forest measurements and AIRSAR data are used for validation of the modified model. The cross-polarization backscattering is improved in different degrees for different crown structures and at different bands. | NI WenJian1,2, GUO ZhiFeng1 & SUN GuoQing3 1 State Key Laboratory of Remote Sensing Science, jointly sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3 Department of Geography, University of Maryland, College Park, MD 27042, USA | 2010 | Science China Earth Sciences2010，53，7： | 4 |
| 4 | Change of lumbar motion after multi-level posterior dynamic stabilization with bioflex system:1 year follow up显示文摘 | Park H Zhang HY Cho BY | 2009 | J Korean Neurosurg Soc2009，46，4： | 1 |
| 5 | Normalization of negative T-wave on electrn- cardiography and fight ventricular dysfunction in patients with an acute pulmonary embolism 显示文摘 | Choi BY Park DG | 2012 | Korean J Intern Med2012，27，1： | 1 |
| 6 | Correlation of serum- soluble triggering receptor expressed on myeloid cells-1 with clinical disease activity in inflammatory bowel dis- ease显示文摘 | Park J J Cheon JH Kim BY | 2009 | Dig Dis Sci2009，54，7： | 1 |
| 7 | A phaseⅡstudy ofpaclitaxel plus cisplatin chemotherapy in an unfavourable groupof patients with cancer of unknown primary site显示文摘 | Park YH Ryoo BY Choi SJ | 2004 | Jpn J ClinOncol2004，34，11： | 1 |
| 8 | Various image findings of skel- etal muscle metastases with clinical correlation 显示文摘 | Lee BY Choi JE Park JM | 2008 | Skeletal Radi- ol2008，7，： | 1 |
| 9 | MSX1 polymorphism associated with risk of oral cleft in Korea: Evidence from case-parent trio and case-control studies显示文摘 | Park J Park BY Kim HS ct al | 2007 | Yonsci Med J2007，48，1： | 1 |
| 10 | MSX1 polymorphism associated with risk of oral cleft in Korea:Evidence from case-parent trio and case-control studies显示文摘 | Park J Park BY Kim HS | | 0，，01： | 1 |
| 11 | Imaging correlation of the degree of degenerative IA-5 spondylolisthesis with the corresponding amount of facet fluid 显示文摘 | Cho BY Murovie JA Park J | 2009 | J Neurosurg Spine2009，11，5： | 1 |
| 12 | Capecitabine in combination with Oxaliplatin(XELOX) asa first-line therapy for advanced gastric cancer显示文摘 | Park YH Lee JL Ryoo BY | | 0，，04： | 1 |
| 13 | A comparative study of the lateral crus of alar cartilages in unilateral cleft lip nasal deformity显示文摘 | Park BY Lew DH Lee YH | 1998 | Plast Reconstr Surg1998，101，4： | 1 |
| 14 | Preparation of alginate beads for floating drug delivery:effects of CO2 gas forming agents显示文摘 | Park HJ Hwang SJ | 2002 | Int J Pharm2002，239，1： | 1 |
| 15 | A phase Ⅱ study of capecitabine and docetaxel combination chemotherapy in patients with advanced gastric cancer 显示文摘 | Park YH Ryoo BY Choi SJ | 2004 | Br J Cancer2004，90，7： | 1 |
| 16 | Diagnostic application of tar- geted resequencing for familial nonsyndromic hearing loss显示文摘 | Choi BY Park G Gim J | 2013 | PLoS One2013，8，68： | 1 |
| 17 | Capcitabine in combination with oxaliplatin (XELOX) as a first-line therapy for advanced gastric cancer 显示文摘 | Park YH Lee JL Ryoo BY | 2008 | Chemother Pharmaco12008，61，4： | 1 |
| 18 | Microtia reconstruction using tissue ex- panders without skin grafts from groin region 显示文摘 | Park BY Im JT Lim SY | 2014 | J Plast Reconstr Aes- thet Surg2014，67，11： | 1 |
| 19 | The Effect of morphological modification on the electrochemical properties of SnO2 nanomaterial 显示文摘 | By Min-Sik Park Yong-Mook Kang Gou-Xiu Wang | 2008 | Advanced Functional Materials2008，18，： | 1 |
| 20 | Correlation of serum-soluble trig gering receptor expressed on myeloid cells-1 with clinical disease activity in inflammatory bowel disease显示文摘 | Park JJ Cheon JH Kim BY | 2009 | Dig Dis Sci2009，54，7： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员