کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6692631 | 501914 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement and estimation of photosynthetically active radiation from 1961 to 2011 in Central China
ترجمه فارسی عنوان
اندازه گیری و برآورد تابش فعال فتوسنتزی از سالهای 1961 تا 2011 در چین مرکزی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Measurements of photosynthetically active radiation (PAR) and global solar radiation (G) at WHU, Central China during 2006-2011 were used to investigate the seasonal characteristics of PAR and PAR/G (PAR fraction). Both PAR and PAR fraction showed similar seasonal features that peaked in values during summer and reached their lowest in winter with annual mean values being 22.39 mol mâ2 dâ1 and 1.9 mol M Jâ1 respectively. By analyzing the dependence of PAR on cosine of solar zenith angle and clearness index at WHU, an efficient all-weather model was developed for estimating PAR values under various sky conditions, which also produced accepted estimations with high accuracy at Lhasa and Fukang. PAR dataset was then reconstructed from G for 1961-2011 through the new developed model. Annual mean daily PAR was about 23.12 mol mâ2 dâ1, there was a significant decreasing trend (11.2 mol mâ2 per decade) during the last 50 years in Central China, the decreases were sharpest in summer (â24.67 mol mâ2 per decade) with relatively small decreases being observed in spring. Meanwhile, results also revealed that PAR began to increase at a rate of 0.1 mol mâ2 per year from 1991 to 2011, which was in consistent with variation patterns of global solar radiation in the study area. The proposed all-weather PAR model would be of vital importance for ecological modeling, atmospheric environment, agricultural processes and solar energy application.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 111, November 2013, Pages 1010-1017
Journal: Applied Energy - Volume 111, November 2013, Pages 1010-1017
نویسندگان
Lunche Wang, Wei Gong, Chen Li, Aiwen Lin, Bo Hu, Yingying Ma,