数据说明
Ocean Net Primary Production (NPP) -Eppley-VGPM
上传时间：2019-05-22 14:08:40 浏览次数：作者与来源：admin
SeaWIFS
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Sep. 1997 to Dec 2007.
Source: SeaWiFS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
where Pbopt is the maximum carbon fixation rate within a water column (mg C· mg Chla-1·h-1), and is a function of sea surface temperature in the Eppley-VGPM model (Equation (2)). PAR is the sea surface photosynthetically active radiation intensity (Enistien·m-2·d-1). Chla and Zeu are the sea surface chlorophyll-a concentration (mg·m-3) and euphotic layer depth (m), respectively.
where SST is the sea surface temperature (℃).
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project documentation and related publications can be found at the website: http://www.science.oregonstate.edu/ocean.productivity.
MODIS
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Jul. 2002 to on-going.
Source: MODIS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
where Pbopt is the maximum carbon fixation rate within a water column (mg C· mg Chla-1·h-1), and is a function of sea surface temperature in the Eppley-VGPM model (Equation (2)). PAR is the sea surface photosynthetically active radiation intensity (Enistien·m-2·d-1). Chla and Zeu are the sea surface chlorophyll-a concentration (mg·m-3) and euphotic layer depth (m), respectively.
where SST is the sea surface temperature (℃).
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project
documentation and related publications can be found at the website:http://www.science.oregonstate.edu/ocean.productivity.
VIIRS
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Feb. 2012 to on-going.
Source: VIIRS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
where Pbopt is the maximum carbon fixation rate within a water column (mg C· mg Chla-1·h-1), and is a function of sea surface temperature in the Eppley-VGPM model (Equation (2)). PAR is the sea surface photosynthetically active radiation intensity (Enistien·m-2·d-1). Chla and Zeu are the sea surface chlorophyll-a concentration (mg·m-3) and euphotic layer depth (m), respectively.
where SST is the sea surface temperature (℃).
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project
documentation and related publications can be found at the website:http://www.science.oregonstate.edu/ocean.productivity.
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Sep. 1997 to Dec 2007.
Source: SeaWiFS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
| NPP = Chla × Pbopt × day length × [0.66125 × PAR / ( PAR + 4.1 )] × Zeu | (1) |
| Pbopt=1.54 × pow(10, 0.0275 × SST - 0.07) | (2) |
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project documentation and related publications can be found at the website: http://www.science.oregonstate.edu/ocean.productivity.
MODIS
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Jul. 2002 to on-going.
Source: MODIS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
| NPP = Chla × Pbopt × day length × [0.66125 × PAR / ( PAR + 4.1 )] × Zeu | (1) |
| Pbopt=1.54 × pow(10, 0.0275 × SST - 0.07) | (2) |
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project
documentation and related publications can be found at the website:http://www.science.oregonstate.edu/ocean.productivity.
Net primary production is the amount of photosynthetically fixed carbon available to the first heterotrophic level and, as such, is the relevant metric for addressing environmental questions ranging from trophic energy transfer to the influence of biological processes on carbon definition cycling (Lindeman 1942).
Unit: mg C/m2/day
Resolution: 9km pixel, monthly
Duration: Feb. 2012 to on-going.
Source: VIIRS.
Version:
Processing: Original monthly mean products are shown.
For Eppley-VGPM:
The Eppley-VGPM is a modified version of the standard-VGPM algorithm. It is also a "chlorophyll-based" model that estimate NPP from chlorophyll using a temperature-dependent description of chlorophyll-specific photosynthetic efficiency.
| NPP = Chla × Pbopt × day length × [0.66125 × PAR / ( PAR + 4.1 )] × Zeu | (1) |
| Pbopt=1.54 × pow(10, 0.0275 × SST - 0.07) | (2) |
Known issues
It is worth noting that the products here are mainly used to estimate the NPP of the global ocean. When estimating the NPP of a regional area, it is necessary to use the measured NPP data to verify the applicability of the products presented here.
All the contents of this page are quoted from Oregon State University. All project
documentation and related publications can be found at the website:http://www.science.oregonstate.edu/ocean.productivity.
