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File:Beringia summer warmth index month c 1.svg

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Captions

Summer Warmth Index (degrees of months above 0 C) in Eastern Beringia during Last Glacial Maximum

Summary edit

Description
English: Summer Warmth Index in Beringia during Last Glacial Maximum in Eastern Beringia. Summer Warmth Index SWI is sum of avearage motths temperaturesa above 0 Celcius.
Date
Source Own work
Author Merikanto
SVG development
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Sources of data: Chelsa Last Glacial Maximum CCSM4 temperature files.

Data is processed with R script and visualized with NASA Panoply.

https://chelsa-climate.org/last-glacial-maximum-climate/ ftp://envidatrepo.wsl.ch/uploads/chelsa/chelsa_V1/pmip3/NCAR_CCSM4/[dead link]

Data citation Version 1.2Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P., Kessler, M.(2017) Data from: Climatologies at high resolution for the earth’s land surface areas. Dryad Digital Repository. doi.org/10.5061/dryad.kd1d4

Article citation Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P. & Kessler, M. (2017) Climatologies at high resolution for the earth’s land surface areas. Scientific Data 4, 170122.

    2. Summer Warmth Index from temperature rasters in R
    3. SWI calculation, Chelsa CCSM dataset


library(raster) library(sp)

    1. beringia

lon1=-180 lon2=-120 lat1=50.0 lat2=80.0

wext1<- extent(lon1,lon2,lat1,lat2)

writeout<-function(oras, outn, varnamex, varunitx, longnamex) { crs(oras) <- "+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0" writeRaster(oras, filename=outn, overwrite=TRUE, format="CDF", varname=varnamex, varunit=varunitx, longname=longnamex, xname="lon", yname="lat") }


wctmean1<-stack(unzip("D:/razter2/chelsa_ccsm4_lgm_tmean.zip"))


  1. print (wctmean1)

p1=wctmean11

p3<-crop(p1,wext1) p3=p3*0.0 p5<-p3


for (n in 1:12) { p1<-wctmean1n p2<-crop(p1,wext1) p4<-(p2-2731.5)/10.0 ##Kelvin*10 to Celcius p5=p5+p4 p4[p4 < 0] <-0 p3=p3+p4

}

    1. january, july

n=1 p1<-wctmean1n p2<-crop(p1,wext1) january1<-(p2-2731.5)/10.0 ##Kelvin*10 to Celcius

n=7 p1<-wctmean1n p2<-crop(p1,wext1) july1<-(p2-2731.5)/10.0 ##Kelvin*10 to Celcius


p5=p5/12.0

  1. plot(p1)
  1. print (p1)


plot(p3)


writeout(p3, "chelsa_summerwarmth.nc", "SWI", "month °C", "Summer_Warmth_Index, Beringia, LGM") writeout(p5, "chelsa_lgm_tannual_1.nc", "T_Year_avg", "°C", "Average temperature of year, Beringia, LGM")

writeout(january1, "chelsa_lgm_tjanuary_1.nc", "T_January_avg", "°C", "Temperature of January, Beringia, LGM") writeout(july1, "chelsa_lgm_tjuly_1.nc", "T_July_avg", "°C", "Temperature of July, Beringia, LGM")




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Date/TimeThumbnailDimensionsUserComment
current11:23, 4 September 2020Thumbnail for version as of 11:23, 4 September 20201,650 × 1,275 (1.05 MB)Merikanto (talk | contribs)New dataset
11:34, 4 November 2019Thumbnail for version as of 11:34, 4 November 20191,650 × 1,275 (1.09 MB)Merikanto (talk | contribs)User created page with UploadWizard

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