gVoCC | R Documentation |
Function to calculate the velocity of climate change after Burrows et al. (2011) based on local climatic temporal trends and spatial gradients.
gVoCC(tempTrend, spatGrad)
tempTrend |
The output from the tempTrend function containing the long-term linear climatic trends. |
spatGrad |
The output from the spatGrad function containing the magnitudes and angles for the spatial climatic gradient. |
A RasterStack
containing the climate velocity magnitude ("voccMag",
km/yr for unprojected rasters and spatial unit/year for projected rasters) and angle("voccAng" in degrees).
Jorge Garcia Molinos
Burrows et al. 2011. The pace of shifting climate in marine and terrestrial ecosystems. Science, 334, 652-655.
tempTrend
, spatGrad
?HSST yrSST <- sumSeries(HSST, p = "1969-01/2009-12", yr0 = "1955-01-01", l = nlayers(HSST), fun = function(x) colMeans(x, na.rm = TRUE), freqin = "months", freqout = "years") tr <- tempTrend(yrSST, th = 10) sg <- spatGrad(yrSST, th = 0.0001, projected = FALSE) # Magnitude and angle of the climate velocity (km/yr) 1960-2009 v <- gVoCC(tr,sg) plot(v)
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