flash_austria {FlashAustria}R Documentation

Flash Counts for Austria

Description

Lightning discharges counted on 32 x 32 sq-km grid over Austria, Europe, for the years 2010–2018 and the month May–August, detected by the ground-based Austrian Lightning Detection and Information System (ALDIS). A selection of atmospheric parameters from the fifth ECMWF re-analysis (ERA5) interpolated nearest neighbour method to the grid of the counted lightning discharges. The temporal resolution of the data is hourly.

Format

Three objects flash_austria_train, flash_austria_eval and flash_austria_case are added to the environment. flash_austria_train and flash_austria_eval are data.frames. flash_austria_case is a sf object—which contains a geometry column providing the 32 x 32 sq-km grid as polygons.

counts

ALDIS counts of cloud-to-ground lightning discharges

d2m

2m dewpoint temperature

q_prof_PC1

first principal component of the vertical profile of specific humidity

cswc_prof_PC4

fourth principal component of the vertical profile of specific snow water content

t_prof_PC1

first principal component of the vertical profile of temperature

v_prof_PC2

second principal component of the vertical profile of v component of wind

sqrt_cape

square root of convective available potential energy

sqrt_lsp

square root of large scale precipitation

Details

Only a random subset of the data given positive counts is provided for training and evaluation: flash_austria_train and flash_austria_eval contain 12000 and 6000 observations, respectively. As prediction cases 2019-09-15 06 UTC, 2001-09-15 17 UTC, 2001-09-15 23 UTC and 2001-09-16 13 UTC are provided.

References

To cite the flash count data (observations), please use:

Schulz, W., Cummins, K., Diendorfer, G., and Dorninger, M. (2005). Cloud-to-Ground Lightning in Austria: A 10-Year Study Using Data from a Lightning Location System. J. Geophys. Res., 110, D09101. https://doi.org/10.1029/2004JD005332

Schulz, W. and Diendorfer, G. and Pedeboy, S. and Poelman, D. R. (2016). The European Lightning Location System EUCLID—Part 1: Performance Analysis and Validation. Nat. Hazards Earth Syst. Sci., 16, 595–605. https://doi.org/10.5194/nhess-16-595-2016

To cite the reanalyses data (covariates), please use:

Copernicus Climate Change Service (C3S) (2017). ERA5: Fifth Generation of ECMWF Atmospheric Reanalyses of the Global Climate. Copernicus Climate Change Service Climate Data Store (CDS), date of access: June 2019. https://cds.climate.copernicus.eu/cdsapp#!/home

Examples

data("flash_austria", package = "FlashAustria")
head(flash_austria_train)
nrow(flash_austria_train)
hist(flash_austria_train$counts,
  breaks = c(seq(.5, 50.5), Inf),
  xlim = c(0, 50),
  col = "lightgray"
)

plot(counts ~ log(sqrt_cape), flash_austria_train)

nrow(flash_austria_eval)

if (require(sf)) {
  class(flash_austria_case)
  head(flash_austria_case)
  plot(st_geometry(flash_austria_case))
}


[Package FlashAustria version 0.1-0 Index]