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. Author manuscript; available in PMC: 2014 Jan 23.
Published in final edited form as: Agric For Meteorol. 2011 Dec 15;151(12):1731–1740. doi: 10.1016/j.agrformet.2011.07.007

Figure 1.

Figure 1

Meteorological characterisation of the 2001-2009 study period, showing monthly averages of incident photosynthetically active radiation (PAR), air temperature (TA; closed symbols), vapour pressure deficit (VPD; open symbols), the Standardised Precipitation Index (SPI), volumetric soil water content (SWC; 0.05 m depth), monthly totals of precipitation (P), and daily average green area index (GAI). Black bars in the lowermost panel indicate snow cover duration, while symbols and lines indicate measurements of GAI and fits to measured GAI, respectively. Minimum GAI values during summertime correspond to meadow cuts occurring 3 times per year. SWC measurements during periods of soil frost may be unreliable due to frozen water and are thus not shown.