数据说明
Special dataset for global ocean-Secchi Disk Depth (SDD)
上传时间:2019-05-23 00:17:56 浏览次数:作者与来源:admin
1. SeaWIFS
It is the product of the Secchi Disk depth (or water transparency) retrieved by SeaWiFS.
Unit: m
Resolution:  9km
Duration: 1997-2010
Source: The original data of the monthly water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm retrieved by SeaWiFS were provided by NASA.
Version: 2018
Dataset Name: 
Processing:
Based on the SeaWiFS-derived water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm, the water transparency (alias Secchi disk depth, SDD) is retrieved using the semi-analytic algorithm (He et al., 2004a;2004b;2017) as
Zd=1/(a+bb)ln[ρpαβ(a+bb)/Cefbb]
where a and bb are the absorption and backscattering coefficients, which were retrieved by the QAA algorithm developed by Lee et al. (2002)
Known Issues:
In the turbid coastal waters, the water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm may have high uncertainty, which will transport to the retrieved SDD. Moreover, in the turbid water, 443nm is not best band with highest transmittance in water.
Reference
Xianqiang He,Delu pan, Zhihua Mao, Qiankun Zhu.The study on the inversing model of water transparency using the SeaWiFS data. ACTA OCEANOLOGICA SINICA,26(5):55-62,2004.(In Chinese with English abstract) .
Xianqiang He*, Delu Pan, Yan Bai, Tianyu Wang, Chen-Tung Arthur  Chen, Qiankun Zhu, Zengzhou Haoa, Fang Gong. Recent changes of global ocean transparency observed by SeaWiFS. Continental Shelf Research,http://dx.doi.org/10.1016/j.csr.2016.09.011 ,2016.
Xianqiang He*,Yan Bai,Chen-Tung Authur Chen,Yi-Chia Hsin,Chau-Ron Wu,Weidong Zhai,Zhiliang Liu,Fang Gong,Satellite views of the episodic terrestrial material transport to the southern Okinawa Trough driven by typhoon,Journal of Geophysical Research - C: Oceans,119:4490-4504, 2014.
Acknowledgment
Please cite the above references if this dataset are used. Moreover, the satellite ground station and the satellite data processing & sharing center of the SOED/SIO should be acknowledged.




2. MODIS/Aqua


It is the product of the Secchi Disk depth (or water transparency) retrieved by MODIS/Aqua.
Unit: m
Resolution:  9km
Duration: 2002-2018
Source: The original data of the monthly water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm retrieved by SeaWiFS were provided by NASA.
Version: 2018
Dataset Name: 
Processing:
Based on the SeaWiFS-derived water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm, the water transparency (alias Secchi disk depth, SDD) is retrieved using the semi-analytic algorithm (He et al., 2004a;2004b;2017) as
Zd=1/(a+bb)ln[ρpαβ(a+bb)/Cefbb]

where a and bb are the absorption and backscattering coefficients, which were retrieved by the QAA algorithm developed by Lee et al. (2002)
Known Issues:
In the turbid coastal waters, the water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm may have high uncertainty, which will transport to the retrieved SDD. Moreover, in the turbid water, 443nm is not best band with highest transmittance in water.
Reference
Xianqiang He,Delu pan, Zhihua Mao, Qiankun Zhu.The study on the inversing model of water transparency using the SeaWiFS data. ACTA OCEANOLOGICA SINICA,26(5):55-62,2004.(In Chinese with English abstract) .
Xianqiang He*, Delu Pan, Yan Bai, Tianyu Wang, Chen-Tung Arthur  Chen, Qiankun Zhu, Zengzhou Haoa, Fang Gong. Recent changes of global ocean transparency observed by SeaWiFS. Continental Shelf Research,http://dx.doi.org/10.1016/j.csr.2016.09.011 ,2016.
Xianqiang He*,Yan Bai,Chen-Tung Authur Chen,Yi-Chia Hsin,Chau-Ron Wu,Weidong Zhai,Zhiliang Liu,Fang Gong,Satellite views of the episodic terrestrial material transport to the southern Okinawa Trough driven by typhoon,Journal of Geophysical Research - C: Oceans,119:4490-4504, 2014.
Acknowledgment
Please cite the above references if this dataset are used. Moreover, the satellite ground station and the satellite data processing & sharing center of the SOED/SIO should be acknowledged.

3. VIIRS



It is the product of the Secchi Disk depth (or water transparency) retrieved by VIIRS/SNPP.
Unit: m
Resolution:  9km
Duration: 2012-2018
Source: The original data of the monthly water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm retrieved by SeaWiFS were provided by NASA.
Version: 2018
Dataset Name: 
Processing:
Based on the SeaWiFS-derived water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm, the water transparency (alias Secchi disk depth, SDD) is retrieved using the semi-analytic algorithm (He et al., 2004a;2004b;2017) as
Zd=1/(a+bb)ln[ρpαβ(a+bb)/Cefbb]

where a and bb are the absorption and backscattering coefficients, which were retrieved by the QAA algorithm developed by Lee et al. (2002)
Known Issues:
In the turbid coastal waters, the water absorption coefficient, particulate backscattering coefficient and remote sensing reflectance at 443nm may have high uncertainty, which will transport to the retrieved SDD. Moreover, in the turbid water, 443nm is not best band with highest transmittance in water.
Reference
Xianqiang He,Delu pan, Zhihua Mao, Qiankun Zhu.The study on the inversing model of water transparency using the SeaWiFS data. ACTA OCEANOLOGICA SINICA,26(5):55-62,2004.(In Chinese with English abstract) .
Xianqiang He*, Delu Pan, Yan Bai, Tianyu Wang, Chen-Tung Arthur  Chen, Qiankun Zhu, Zengzhou Haoa, Fang Gong. Recent changes of global ocean transparency observed by SeaWiFS. Continental Shelf Research,http://dx.doi.org/10.1016/j.csr.2016.09.011 ,2016.
Xianqiang He*,Yan Bai,Chen-Tung Authur Chen,Yi-Chia Hsin,Chau-Ron Wu,Weidong Zhai,Zhiliang Liu,Fang Gong,Satellite views of the episodic terrestrial material transport to the southern Okinawa Trough driven by typhoon,Journal of Geophysical Research - C: Oceans,119:4490-4504, 2014.
Acknowledgment
Please cite the above references if this dataset are used. Moreover, the satellite ground station and the satellite data processing & sharing center of the SOED/SIO should be acknowledged.