渤海海域MODIS波段衰减深度研究
Study on attenuation depths for MODIS bands in the Bohai Sea in China
-
摘要: 衰减深度是传感器检测到的水体信息的90%的深度,衰减深度越大,传感器检测到的水体信息越多,提取水体信息的精确度越高,同时从衰减深度还可了解传感器获取的水体信息到底来自水下多深的水层。以MODIS数据为数据源,对渤海海域衰减深度进行计算,分析了某一时间渤海海域衰减深度波谱变化和某一波段渤海海域衰减深度季节变化。衰减深度波谱曲线为单峰曲线,不同区域的衰减深度波谱曲线的相似和差异情况与前人根据渤海海域悬浮泥沙含量和光谱情况进行分区的情况较一致,衰减深度最大值具有红移现象(不同区域衰减深度最大值的情况是:渤海西北海岸外区域和渤海海峡区域在波段531nm,渤海中部区域在波段551nm,现黄河口影响区域、老黄河口影响区域、辽东湾西侧区域、辽东湾东侧区域在波段555nm),衰减深度波谱佐证了渤海海域为二类水体;衰减深度在夏季最大,在秋季次之,在春季和冬季在不同区域大小顺序有所不同。不同区域衰减深度由小到大顺序是现黄河口影响区域和辽东湾东侧区域、辽东湾西侧区域、老黄河口影响区域、渤海西北海岸外区域和渤海中部区域、渤海海峡区域(除去412和645nm),其中现黄河口影响区域与辽东湾东侧区域和渤海中部区域与渤海西北海岸外区域的衰减深度的大小顺序在不同季节和不同波段有差异。Abstract: An attenuation depth is defined for remote sensing purposes as adepth above which 90% of the arising light leaving the water surface is emanated.The deeper the attenuation depth,the more information of water is detected by remote sensing,then the more precise information of water is extracted.Mean-while,the attenuation depth is help to know water layer(by it s thickness) from which remote sensing will be able to extract information.A number of investigators are using the moderate resolut ion imaging spectroradiometer(or MODIS) for remote sensing of ocean color.It is necessary to have a rough idea of the effectiveat tenuation depth of imagery in each of the spectral bands employed by the MODIS.The attenuation depth is directly determined from MODIS data.Though analyzing the spectral distributions of attenuation depth on 7 August 2003 and the seasonal variations of attenuation depth(551nm) in the Bohai Sea indicated that the spectral distributions of the attenuation depth for the spectralrange 400~700 nm are single-peak curves,and their similar and difference in different regions consist with other scholarsc results of zoning,moreover their support the Bohai Sea is Case 2 water;the maximum at tenuation depths shift to-ward longer wavelengths,liking thered shift,with increase of turbidity of water,just like in these regions representing by Points C and G is at 531nm,by Point Fis the maximum attenuation depth at 551nm,by Points A,B,D and E is at 555nm;the seasonal change of the attenuation depth is the largest in the summer,followed by the fall,and the ranking of winter and spring in different regions is varied.The at tenuation depth in different regions is varied:the attenuation depth of Points A and E is less than that of Point Dless than that of Pint Bless than that of Points C and F less than that of point G(excluding 412 and 645nm) ,in which the order of at tenuation depth of between Points A and E(and between Points F and C) representing regions is dissimilarity in different seasons and different bands.
-
Key words:
- attenuation depth /
- MODIS /
- Bohai Sea
-
梁顺林,陈丙咸.遥感可见光波段的水体透视深度研究[J].南京大学学报,1989,25(2):322-332. 梅安新,彭望禄,秦其明,等.遥感概论[M].北京:高等教育出版社,2001:237-238. GORDON H R,MCCLUNEY W R.Estimation of the depth of sunlight penetration in the sea for remote sensing[J].Applied Optics,1975,14(2):413-416. GORDON H R,CLARK D K.Remote sensing optical properties of a stratified ocean,an improved interpretation[J].Applied Optics,1980,19(20):3428-3430. SATHYENDRANATH S,PLATT T.Remote sensing of ocean chlorophyll:consequence of nonuniform pigment profile[J].Applied Optics,1989,28(3):490-495. GORDON H R.Remote sensing of optical properties in continuously stratified waters[J].Applied Optics,1978,17(12):1893-1897. GORDON H R,BROWN O B.Diffuse reflectance of the ocean:some effects of vertical structure[J].Applied Optics,1975,14(12):2892-2895. FARMER C T,MOORE C A,ZIKA R G,et al.Effects of low and high Orinoco River flow on the underwater light field of the eastern Caribbean Basin[J].Journal of Geophysical Research,1993,98(C2):2279-2288. ARST H.Optical Properties and Remote Sensing of Multicomponental Water Bodies[M].Chiehester,Praxis Publishing,2003. ARST H,MAEK1VI S,KUTSER T,et al.Optical investigations of Estonian and Finnish Lakes[J].Lakes & Reservoirs:Research and Management,1996,2:187-198. JERLOV N G.Optical Oceanography[M].Amsterdam:Elsevier Science Publications,1968. ISLAM A,GAP J,AHMAD W,et al.A composite DOP approach to excluding bottom reflectance in mapping water parameters of shallow coastal zones from TM imagery[J].Remote Sensing of Environment,2004,92(1):40-51. GORDON H R,BOYNTON G C.Radiance irradiance inversion algorithm for estimating the absorption and baekseattering coefficients of natural waters,vertically stratified water bodies[J].Applied Optics,1998,37(18):3886-3896. MISHRA D R,NARUMALANI S,RUNDQUIST D,et al.Characterizing the vertical diffuse attenuation coefficient for downwelling irradiance in coastal waters:Implications for water penetration by high resolution satellite data[J].ISPRS Journal of Photogrammetry & Remote Sensing,2005,60(1):48-64. 周良明,刘玉光,郭佩芳.渤海和北黄海水色光谱的特征分析[J].海洋通报,2005,24(2):13-19. 乐华福,赵太初,陈立娣,等.SCaWiFS资料水色辐射模式验证的研究[J].海洋环境科学,1999,18(4):57-61. LEE Z P,DU K P,ARNONE R.A model for the diffuse attenuation coefficient of downwelling irradiance[J].Journal of Geophysical Research,2005,110:C02016,doi: 10.1029/2004JC002275. LEE Z P,DARECKI M,CARDER K L,et al.Diffuse attenuation coefficient of downwelling irradiance:an evaluation of remote sensing methods[J].Journal of Geophysical Research,2005,110:C02017,doi: 10.1029/2004JC002573. LEE Z P,CARDER K L,ARNONE P R.Deriving inherent optical properties from water color,a multiband quasi-analytical algorithm for optically deep waters[J].Applied Optics,2002,41(27):5755-5772. OBPG(Ocean Biology Processing Group) at NASA's Goddard Space Flight Center.Ocean color web[DB/OL].http://oceancolor,gsfc.nasa.gov/cgi/browse,pl? sen=am,2009-03-06/2008-04-01. 廖迎娣,张玮,DESCHAMPPY.运用SeaWiFS遥感数据探测中国东部沿海悬浮泥沙浓度的研究[J].水动力学研究与进展,2005,20(5):558-564. OBPG(Ocean Biology Processing Group) at NASA's Goddard Space Flight Center.Ocean color SeaDAS[DB/OL].http://oeeancolor.gsfc.nasa.gov/seadas/,2008-03-31/2008-04-20. FRANZ B.Extension of MODIS ocean processing capabilities to include the 250 & 500-meter land/cloud bands[EB/OL].http,//oceancolor,gsfc.nasa.gov/DOCS/modis_hires/,2006-10 23/2008-07-11. 江文胜,苏健,杨华,等.渤海悬浮物浓度分布和水动力特征的关系[J].海洋学报,2002,24(增刊Ⅰ):212-217. 秦蕴珊,李凡.渤海海水中的悬浮体的研究[J].海洋学报,1982,4(2):191-200. JIANG W,POHLMANN T,SUN J,et al.SPM transport in the Bohai Sea:field experiments and numerical modeling[J].Journal of Marine Systems,2004,44:175-188. 王芳,李国胜.海洋悬浮泥沙二元特征参数MODIS遥感反演模型研究[J].地理研究,2007,26(6):1186-1196.
点击查看大图
计量
- 文章访问数: 977
- HTML全文浏览量: 11
- PDF下载量: 1282
- 被引次数: 0