Day scale primary productivity estimation method based on photoresponse segmentation characteristics

A primary productivity and photoresponse technology, applied in forecasting, data processing applications, calculations, etc., can solve problems such as low calculation accuracy and low calculation efficiency

Inactive Publication Date: 2013-04-03
ZHEJIANG UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low calculation accuracy or low calculation efficiency of existing "instantaneous" to "daily" scale primary productivity calculations, the present invention provides a day-scale primary productivity estimation method based

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
  • Day scale primary productivity estimation method based on photoresponse segmentation characteristics
  • Day scale primary productivity estimation method based on photoresponse segmentation characteristics
  • Day scale primary productivity estimation method based on photoresponse segmentation characteristics

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] The present invention will be further described below in conjunction with the drawings.

[0050] Reference Figure 1~Figure 4 , A sky-scale primary productivity estimation method based on segmented features of light response, the measurement method comprising the following steps:

[0051] 1) Sunshine time segment:

[0052] Divide the time range from sunrise to noon into two segments, and calculate the time length D of each segment t1 And D t2 ,Calculate the time t1 and t2 corresponding to each intermediate position respectively.

[0053] 2) Calculation of instantaneous meteorological element values ​​at the intermediate moment of each segment:

[0054] According to the sine function, the formula for the daily variation of meteorological elements such as temperature and radiation is established, and t 1 And t 2 Time is substituted into the formula to obtain t 1 And t 2 The instantaneous temperature and radiation value corresponding to the moment.

[0055] 3) Calculation of instant...

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

Disclosed is a day scale primary productivity estimation method based on photoresponse segmentation characteristics. The method includes that (1) a primary productivity in a time period from sunrise to noon is calculated, then the primary productivity is multiplied by 2 to obtain a 'daytime' primary productivity, the primary productivity in the time period from sunrise to noon is divided into two sections, and time lengths corresponding to a first section of middle time t1 and a second section of middle time t2 are Dt1 and Dt2 respectively; (2) instantaneous temperature and radiation which are in daytime and correspond to the t1 and t2 are calculated by an air temperature and radiation diurnal variation formula; (3) an instantaneous photosynthetic rate which the t1 and the t2 correspond to is calculated by a photosynthetic rate model; and (4) the instantaneous photosynthetic rate is combined with the time lengths and a segmentation method is utilized to convert the instantaneous photosynthetic rate to the 'daytime' primary productivity. According to the day scale primary productivity estimation method based on the photoresponse segmentation characteristics, the time scale transformation from 'instant' to 'day' is performed, the 'day' scale primary productivity can be accurately estimated, and the calculating efficiency is greatly improved.

Description

technical field [0001] The invention relates to the large field of global carbon cycle calculation and the research direction of primary productivity space-time scale conversion, in particular to a day-scale primary productivity estimation method based on light response segmentation features. Background technique [0002] Primary Productivity The photosynthetic capacity of the earth's vegetation is a key factor for the carbon balance of terrestrial ecosystems. Photosynthesis occurs on the "instantaneous" scale. However, when people conduct long-term carbon cycle dynamic analysis, they generally need to use "daily" or "monthly" data as the basis, especially "daily" scale data, which is fast and accurate. The efficient conversion of photosynthesis on the "instantaneous" scale to primary productivity on the "daily" scale is of great significance for the study of carbon dynamics in large regions. In the current research on the scale conversion from "instantaneous" to "day", eit...

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
IPC IPC(8): G06Q10/04
Inventor 王福民黄敬峰周斌徐俊锋
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap