Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and system for improving calculation accuracy of photosynthetically active radiation (PAR)

A technology of photosynthetically active radiation and calculation accuracy, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problems that do not conform to the actual situation, do not consider the influence of terrain solar radiation, and the calculation method is simple and rough.

Inactive Publication Date: 2011-04-06
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not consider the influence of terrain on solar radiation, and has major defects: the temporal and spatial resolution of TOMS data is low (time resolution: month, spatial resolution: 1°×2.5°, average 500km×500km), and does not consider Terrain influence
From the CASA and GLO-PEM models, it can be seen that the calculation method of PAR in the existing light energy utilization rate model is simple and rough, which does not conform to the actual situation, and thus may greatly misestimate the vegetation primary productivity and net primary productivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for improving calculation accuracy of photosynthetically active radiation (PAR)
  • Method and system for improving calculation accuracy of photosynthetically active radiation (PAR)
  • Method and system for improving calculation accuracy of photosynthetically active radiation (PAR)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0108] In order to make the purpose, technical solution and advantages of the present invention clearer, a method and system for improving the calculation accuracy of photosynthetically active radiation (PAR) of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0109] Introduce in detail a kind of method of improving photosynthetically active radiation (PAR) calculation accuracy of the present invention below in conjunction with above-mentioned target, described method is according to the radiative transfer model of Iqbal and the broadband cloud reflection algorithm of Stephens etc., introduces DEM terrain influence factor, proposes a A method for retrieving photosynthetically active radiation in complex terrain with high precision based on the atmos...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and a system for improving calculation accuracy of photosynthetically active radiation (PAR). The method comprises the following steps of: introducing a terrain influence factor of a digital terrain model, and calculating solar downlink monochromatic light radiation intensity under the condition of a complex terrain, namely I lambda=I dir+ I dif+ I adj, wherein lambda is the wavelength in vacuum; calculating instantaneous PAR under the condition of the complex terrain according to the solar downlink monochromatic light radiation intensity I lambda under the condition of the complex terrain; and expanding into a PAR day value PARd according to the instantaneous PAR.

Description

technical field [0001] The invention relates to the technical field of ecological system monitoring, in particular to a method and system for improving the calculation accuracy of photosynthetically active radiation (PAR). Background technique [0002] The global carbon cycle is the largest cycle of matter and energy between the earth's biosphere and the atmosphere. In this process, terrestrial vegetation plays a key role. Through the action of vegetation, atmospheric carbon dioxide (CO 2 ) into organic substances, and solar energy into chemical energy, which has become the basic material and energy source for human production and life today. Photosynthetically active radiation (photo synthetically active radiation, PAR) refers to the part of solar radiation (400nm-700nm) for photosynthesis, which is the energy source for the formation of plant dry matter. 2 The core factor of the cycle, accurate measurement of photosynthetically active radiation can help improve the accu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 高志强
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com