THE RELATIONSHIP BETWEEN BEAM ATTENUATION AND CHLOROPHYLL CONCENTRATION AND REFLECTANCE IN ANTARCTIC WATERS

被引:13
作者
SAGAN, S
WEEKS, AR
ROBINSON, IS
MOORE, GF
AIKEN, J
机构
[1] UNIV SOUTHAMPTON,SOUTHAMPTON OCEANOG CTR,DEPT OCEANOG,SOUTHAMPTON SO14 3ZH,HANTS,ENGLAND
[2] PLYMOUTH MARINE LAB,PLYMOUTH PL1 3DH,DEVON,ENGLAND
基金
英国自然环境研究理事会;
关键词
D O I
10.1016/0967-0645(95)00073-Y
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Optical and biological data collected during the two-month R.R.S Discovery expedition in Antarctic waters in the Austral spring were used to examine the relationships between c(660 nm), chlorophyll a and the reflectance ratios R(443)/R(550), R(490)/R(550) and R(443 nm). Values of (c-c(w))(660 nm) varied from 0.20 to 1.2 m(-1), being generally positively correlated with the chlorophyll concentration. The computed values of the pigment specific beam attenuation coefficient c* were greater than those typical in Case I waters, exceeding 0.9 m(2) mg(-)1, reducing the accuracy of the chlorophyll remote sensing algorithms designed for Case I waters. The covariance of phytoplankton and related pigments with beam attenuation was examined by the regression equation c-c(w)= A + B(Chl a + phaeo), and the residuals were used to identify the non-chlorophyll dependent data in the region. When the non-chlorophyll dependent data were removed, the accuracy of the chlorophyll remote sensing model was significantly improved.
引用
收藏
页码:983 / 996
页数:14
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