Estimation of light use efficiency by using remote sensing data
نویسندگان
چکیده
å è½å©ç¨ç表å¾æ¤è¢«éè¿å åä½ç¨å°ææªè·/å¸æ¶çè½é转å为ææºç¢³çæçï¼æ¯é¥æä¼°ç®æ¤è¢«ç产åçå ³é®åæ°ãç±äºæ¤è¢«åå¸åæ°åç¯å¢ç综åå½±åï¼å è½å©ç¨ç表ç°åºæ¾èç空é´å¼è´¨æ§åæ¶é´å¨ææ§ï¼å è½å©ç¨ççä¸ç¡®å®æ§æ为åç»ç产å模åä¼°ç®ç²¾åº¦ä¸é«çéè¦åå ãæ¬æ以Fluxnetå ¨çééç«ç¹æ°æ®åMODIS LAI/fPAR产å为æ°æ®æºï¼æ¯è¾äº5ç§é¥ææ¤è¢«ç产å模åä¸çå è½å©ç¨çä¼°ç®æ¹æ³ï¼å¹¶å¨æ¤åºç¡ä¸èèå ç §æ£å°æ¡ä»¶å¯¹å è½å©ç¨ççå½±åï¼ç»åæ´ç©ºææ°ï¼å©ç¨éæ¥çº¿æ§åå½æ¹æ³ååæ°ä¼åæ¹æ³å»ºç«ä¸åæ¤è¢«ç±»åçå è½å©ç¨çä¼°ç®æ¨¡åãéªè¯ç»æ表æï¼èèæ´ç©ºææ°å¯æé«å è½å©ç¨çä¼°ç®ç²¾åº¦ï¼ä¸¤ç§æ¹æ³ä¼°ç®å¾å°çå è½å©ç¨çå¼RMSEåä½äº0.5 gC·MJ-1ï¼éæ¥çº¿æ§åå½æ³å°½ç®¡æºçæ¬ ç¼ºï¼ä½ç±äºéæ©å åè¾å¤ï¼å è½å©ç¨çä¼°ç®ç²¾åº¦è¾é«ï¼R2=0.461ï¼RMSE=0.403 gC·MJ-1ï¼ï¼å¹¿æ³åºç¨çåæ°åæ¹æ³ç±äºèèçå åè¾å°ã模åå½¢å¼è¾åºå®ï¼å è½å©ç¨çä¼°ç®ç²¾åº¦ç¨ä½ï¼R2=0.306ï¼RMSE=0.489 gC·MJ-1ï¼ãæ¬ææ建ç«çå è½å©ç¨çä¼°ç®æ¨¡åå¯åºç¨äºåºåæå ¨çæ¤è¢«å è½å©ç¨çåç产åçä¼°ç®ã
منابع مشابه
Remote sensing of photosynthetic-light-use efficiency of boreal forest
Using a helicopter-mounted portable spectroradiometer and continuous eddy covariance data we were able to evaluate the photochemical reflectance index (PRI) as an indicator of canopy photosynthetic light-use efficiency (LUE) in four boreal forest species during the Boreal Ecosystem Atmosphere experiment (BOREAS). PRI was calculated from narrow waveband reflectance data and correlated with LUE c...
متن کاملAir temperature estimation based on environmental parameters using remote sensing data
This study is aimed at estimating monthly mean air temperature (Ta) using the MODIS Land Surface Temperature (LST), Normalized Difference Vegetation Index (NDVI), latitude, altitude, slope gradient and land use data during 2001-2015. The results showed that despite some spatial similarities between annual spatial patterns of Ta and LST, their variations are significantly different, so that the...
متن کاملDrought Analysis of Alvand Boundary River Using Remote Sensing Data
Extended abstract 1- Introduction The study of the behavior of rivers in the arid and dry areas is one of the most important tasks in the country. Because the area has increased the effects of drought due to the sensitivity of the area and rainfall shortage, it causes changes in the flow and sediment regime, water resources, agriculture, and so on. Since plants react more precisely to t...
متن کاملEstimation of Actual Evapotranspiration using Remote Sensing data
Estimation of actual evapotranspiration (AET) and its spatial distribution are important to understanding of catchment hydrology. The AET is driven by net energy available to evaporate water from soil and vegetation surfaces, and to transpirate water from vegetation. However, estimating AET is difficult as the evapotranspiration process involves complex physical and biological processes. It is ...
متن کاملEstimation of soil moisture using optical, thermal and radar Remote Sensing )Case Study: South of Tehran(
Traditional methods of field measurement of soil moisture in addition to the difficulty, the need for manpower and money and fail to take place on a large scale to be able to show moisture. Therefore, remote sensing has become a widespread use .Landsat 8 satellite data and Sentinel-1 radar satellite from Tehran were provided. 72 soil samples were taken at the same time by satellite passing from...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of remote sensing
سال: 2021
ISSN: ['1007-4619', '2095-9494']
DOI: https://doi.org/10.11834/jrs.20219376