Detailed information on CHELSA climate variables

Usage

CHELSA_variables

Format

An object of class tbl_df (inherits from tbl, data.frame) with 46 rows and 6 columns.

Value

A tibble containing detailed information about various climate variables in CHELSA climate data. Each row in the tibble represents a different climate variable, with columns providing additional details such as the long name, unit, scale, offset, and an explanation of the variable

Examples

ecokit::load_packages(dplyr, gt)

data(CHELSA_variables)
gt::gt(CHELSA_variables)


  Variable
      Long_name
      unit
      scale
      offset
      explanation
    
bio1
mean annual air temperature
deg C
0.1
-273.15
mean annual daily mean air temperatures averaged over 1 year
bio2
mean diurnal air temperature range
deg C
0.1
0.00
mean diurnal range of temperatures averaged over 1 year
bio3
isothermality
deg C
0.1
0.00
ratio of diurnal variation to annual variation in temperatures
bio4
temperature seasonality
deg C/100
0.1
0.00
standard deviation of the monthly mean temperatures
bio5
mean daily maximum air temperature of the warmest month
deg C
0.1
-273.15
The highest temperature of any monthly daily mean maximum temperature
bio6
mean daily minimum air temperature of the coldest month
deg C
0.1
-273.15
The lowest temperature of any monthly daily mean minimum temperature
bio7
annual range of air temperature
deg C
0.1
0.00
Difference between the Maximum Temperature of Warmest month and the Minimum Temperature of Coldest month (bio5-bio6)
bio8
mean daily mean air temperatures of the wettest quarter
deg C
0.1
-273.15
The wettest quarter of the year is determined (to the nearest month)
bio9
mean daily mean air temperatures of the driest quarter
deg C
0.1
-273.15
The driest quarter of the year is determined (to the nearest month)
bio10
mean daily mean air temperatures of the warmest quarter
deg C
0.1
-273.15
The warmest quarter of the year is determined (to the nearest month)
bio11
mean daily mean air temperatures of the coldest quarter
deg C
0.1
-273.15
The coldest quarter of the year is determined (to the nearest month)
bio12
annual precipitation amount
kg m-2
0.1
0.00
Accumulated precipitation amount over 1 year
bio13
precipitation amount of the wettest month
kg m-2
0.1
0.00
The precipitation of the wettest month.
bio14
precipitation amount of the driest month
kg m-2
0.1
0.00
The precipitation of the driest month.
bio15
precipitation seasonality
kg m-2
0.1
0.00
The Coefficient of Variation = 100*standard deviation of the monthly precipitation / mean 
bio16
mean monthly precipitation amount of the wettest quarter
kg m-2
0.1
0.00
The wettest quarter of the year is determined (to the nearest month)
bio17
mean monthly precipitation amount of the driest quarter
kg m-2
0.1
0.00
The driest quarter of the year is determined (to the nearest month)
bio18
mean monthly precipitation amount of the warmest quarter
kg m-2
0.1
0.00
The warmest quarter of the year is determined (to the nearest month)
bio19
mean monthly precipitation amount of the coldest quarter
kg m-2
0.1
0.00
The coldest quarter of the year is determined (to the nearest month)
gdgfgd0
First growing degree day above 0 deg C
julian day
1.0
0.00
First day of the year above 0 deg C
gdgfgd5
First growing degree day above 5 deg C
julian day
1.0
0.00
First day of the year above 5 deg C
gdgfgd10
First growing degree day above 10 deg C
julian day
1.0
0.00
First day of the year above 10 deg C
gddlgd0
Last growing degree day above 0 deg C
julian day
1.0
0.00
Last day of the year above 0 deg C
gddlgd5
Last growing degree day above 5 deg C
julian day
1.0
0.00
Last day of the year above 5 deg C
gddlgd10
Last growing degree day above 10 deg C
julian day
1.0
0.00
Last day of the year above 10 deg C
gdd0
Growing degree days heat sum above 0 deg C
deg C
0.1
0.00
heat sum of all days above the 0 deg C temperature accumulated over 1 year.
gdd5
Growing degree days heat sum above 5 deg C
deg C
0.1
0.00
heat sum of all days above the 5 deg C temperature accumulated over 1 year.
gdd10
Growing degree days heat sum above 10 deg C
deg C
0.1
0.00
heat sum of all days above the 10 deg C temperature accumulated over 1 year.
ngd0
Number of growing degree days
# days
1.0
0.00
Number of days at which tas > 0 deg C
ngd5
Number of growing degree days
# days
1.0
0.00
Number of days at which tas > 5 deg C
ngd10
Number of growing degree days
# days
1.0
0.00
Number of days at which tas > 10 deg C
gsl
growing season length TREELIM
# days
1.0
0.00
Length of the growing season
gst
Mean temperature of the growing season TREELIM
deg C
0.1
-273.15
Mean temperature of all growing season days based on TREELIM
lgd
last day of the growing season TREELIM
julian day
1.0
0.00
Last day of the growing season according to TREELIM
fgd
first day of the growing season TREELIM
julian day
1.0
0.00
first day of the growing season according to TREELIM
gsp
Accumulated precipitation amount on growing season days TREELIM
kg m-2
0.1
0.00
precipitation sum accumulated on all days during the growing season based on TREELIM
fcf
Frost change frequency
count
1.0
0.00
Number of events in which tmin or tmax go above, or below 0 deg C
scd
Snow cover days
count
1.0
0.00
Number of days with snowcover calculated using the snowpack model implementation in from TREELIM
swe
Snow water equivalent
kg m-2
0.1
0.00
Amount of luquid water if snow is melted
kg0
Koeppen-Geiger climate classification
category
1.0
0.00
Koeppen Geiger - Koeppen&Geiger (1936)
kg1
Koeppen-Geiger climate classification
category
1.0
0.00
Koeppen Geiger without As/Aw differentiation - Koeppen&Geiger (1936)
kg2
Koeppen-Geiger climate classification
category
1.0
0.00
Koeppen Geiger after Peel et al. 2007
kg3
Koeppen-Geiger climate classification
category
1.0
0.00
Wissmann 1939
kg4
Koeppen-Geiger climate classification
category
1.0
0.00
Thornthwaite 1931
kg5
Koeppen-Geiger climate classification
category
1.0
0.00
Troll-Pfaffen - Troll&Paffen (1964)
npp
Net primary productivity
g C m-2 yr-1
0.1
0.00
Calculated based on the `Miami model`, Lieth, H., 1972.

Variable	Long_name	unit	scale	offset	explanation
bio1	mean annual air temperature	deg C	0.1	-273.15	mean annual daily mean air temperatures averaged over 1 year
bio2	mean diurnal air temperature range	deg C	0.1	0.00	mean diurnal range of temperatures averaged over 1 year
bio3	isothermality	deg C	0.1	0.00	ratio of diurnal variation to annual variation in temperatures
bio4	temperature seasonality	deg C/100	0.1	0.00	standard deviation of the monthly mean temperatures
bio5	mean daily maximum air temperature of the warmest month	deg C	0.1	-273.15	The highest temperature of any monthly daily mean maximum temperature
bio6	mean daily minimum air temperature of the coldest month	deg C	0.1	-273.15	The lowest temperature of any monthly daily mean minimum temperature
bio7	annual range of air temperature	deg C	0.1	0.00	Difference between the Maximum Temperature of Warmest month and the Minimum Temperature of Coldest month (bio5-bio6)
bio8	mean daily mean air temperatures of the wettest quarter	deg C	0.1	-273.15	The wettest quarter of the year is determined (to the nearest month)
bio9	mean daily mean air temperatures of the driest quarter	deg C	0.1	-273.15	The driest quarter of the year is determined (to the nearest month)
bio10	mean daily mean air temperatures of the warmest quarter	deg C	0.1	-273.15	The warmest quarter of the year is determined (to the nearest month)
bio11	mean daily mean air temperatures of the coldest quarter	deg C	0.1	-273.15	The coldest quarter of the year is determined (to the nearest month)
bio12	annual precipitation amount	kg m-2	0.1	0.00	Accumulated precipitation amount over 1 year
bio13	precipitation amount of the wettest month	kg m-2	0.1	0.00	The precipitation of the wettest month.
bio14	precipitation amount of the driest month	kg m-2	0.1	0.00	The precipitation of the driest month.
bio15	precipitation seasonality	kg m-2	0.1	0.00	The Coefficient of Variation = 100*standard deviation of the monthly precipitation / mean
bio16	mean monthly precipitation amount of the wettest quarter	kg m-2	0.1	0.00	The wettest quarter of the year is determined (to the nearest month)
bio17	mean monthly precipitation amount of the driest quarter	kg m-2	0.1	0.00	The driest quarter of the year is determined (to the nearest month)
bio18	mean monthly precipitation amount of the warmest quarter	kg m-2	0.1	0.00	The warmest quarter of the year is determined (to the nearest month)
bio19	mean monthly precipitation amount of the coldest quarter	kg m-2	0.1	0.00	The coldest quarter of the year is determined (to the nearest month)
gdgfgd0	First growing degree day above 0 deg C	julian day	1.0	0.00	First day of the year above 0 deg C
gdgfgd5	First growing degree day above 5 deg C	julian day	1.0	0.00	First day of the year above 5 deg C
gdgfgd10	First growing degree day above 10 deg C	julian day	1.0	0.00	First day of the year above 10 deg C
gddlgd0	Last growing degree day above 0 deg C	julian day	1.0	0.00	Last day of the year above 0 deg C
gddlgd5	Last growing degree day above 5 deg C	julian day	1.0	0.00	Last day of the year above 5 deg C
gddlgd10	Last growing degree day above 10 deg C	julian day	1.0	0.00	Last day of the year above 10 deg C
gdd0	Growing degree days heat sum above 0 deg C	deg C	0.1	0.00	heat sum of all days above the 0 deg C temperature accumulated over 1 year.
gdd5	Growing degree days heat sum above 5 deg C	deg C	0.1	0.00	heat sum of all days above the 5 deg C temperature accumulated over 1 year.
gdd10	Growing degree days heat sum above 10 deg C	deg C	0.1	0.00	heat sum of all days above the 10 deg C temperature accumulated over 1 year.
ngd0	Number of growing degree days	# days	1.0	0.00	Number of days at which tas > 0 deg C
ngd5	Number of growing degree days	# days	1.0	0.00	Number of days at which tas > 5 deg C
ngd10	Number of growing degree days	# days	1.0	0.00	Number of days at which tas > 10 deg C
gsl	growing season length TREELIM	# days	1.0	0.00	Length of the growing season
gst	Mean temperature of the growing season TREELIM	deg C	0.1	-273.15	Mean temperature of all growing season days based on TREELIM
lgd	last day of the growing season TREELIM	julian day	1.0	0.00	Last day of the growing season according to TREELIM
fgd	first day of the growing season TREELIM	julian day	1.0	0.00	first day of the growing season according to TREELIM
gsp	Accumulated precipitation amount on growing season days TREELIM	kg m-2	0.1	0.00	precipitation sum accumulated on all days during the growing season based on TREELIM
fcf	Frost change frequency	count	1.0	0.00	Number of events in which tmin or tmax go above, or below 0 deg C
scd	Snow cover days	count	1.0	0.00	Number of days with snowcover calculated using the snowpack model implementation in from TREELIM
swe	Snow water equivalent	kg m-2	0.1	0.00	Amount of luquid water if snow is melted
kg0	Koeppen-Geiger climate classification	category	1.0	0.00	Koeppen Geiger - Koeppen&Geiger (1936)
kg1	Koeppen-Geiger climate classification	category	1.0	0.00	Koeppen Geiger without As/Aw differentiation - Koeppen&Geiger (1936)
kg2	Koeppen-Geiger climate classification	category	1.0	0.00	Koeppen Geiger after Peel et al. 2007
kg3	Koeppen-Geiger climate classification	category	1.0	0.00	Wissmann 1939
kg4	Koeppen-Geiger climate classification	category	1.0	0.00	Thornthwaite 1931
kg5	Koeppen-Geiger climate classification	category	1.0	0.00	Troll-Pfaffen - Troll&Paffen (1964)
npp	Net primary productivity	g C m-2 yr-1	0.1	0.00	Calculated based on the `Miami model`, Lieth, H., 1972.