Interpolation of Daily Global Solar Radiation with Thin Plate Smoothing Splines |
| |
Authors: | Y Xia M Winterhalter P Fabian |
| |
Institution: | Lehrstuhl für Bioklimatologie und Immissionsforschung, Ludwig-Maximilians-Universit?t München, Freising, Germany, DE
|
| |
Abstract: | Summary Thin plate smoothing splines incorporating topographic dependence were used to interpolate daily global solar radiation in
the Bavarian forest ecosystem monitoring network, with the degree of data smoothing determined by minimizing the generalized
cross validation. A simple cross validation method was used to discuss the spatial distribution of mean relative errors at
18 forest climate stations. The results show that, from this network 14%–30% mean relative errors can be expected for most
of these forest climate stations in summer, and 20%–30% mean relative errors can be found at a few of forest climate stations
in winter. Time-averaging can reduce these interpolation errors. In this network a mean relative error of 10% can be expected
for weekly and biweekly mean solar radiation at most of forest climate stations in summer. Large errors are related to low
radiation amount under heavy cloud cover. Mean relative errors increase as daily global solar radiation decreases.
Received April 20, 1999 Revised January 20, 2000 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|