Abstract
ABSTRACTSensitivity analysis is important in understanding the relationship between sunshine duration (SD) and reference evapotranspiration (ETref). This study was developed in the Lancang-Mekong River Basin using a non-dimensional relative sensitivity coefficient (SN) relating ETref to SD. The SN for January and July for each station were calculated. The results indicate that (a) the SD and SN change in similar ways, where January and July are selected as two representative time slices; (b) the spatial distributions of the long-term averaged SN for January and July are the reverse of each other; (c) the most abrupt changes in climate occur in the 1980s and the middle region is sensitive to climate change; and (d) periodicities of 2–4 and 14–16 years are detected in the basin generally. The significant increase of inter-decadal filter variance indicates changes in the long-term memory of the local climate system.EDITOR Z.W. KundzewiczASSOCIATE EDITOR not assigned
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