Description Usage Arguments Details Value Examples
Download climate data sets from SNAP.
1 2 |
id |
character, data set ID. See |
area |
character, region or point location of interest. See |
set |
character or |
time_scale |
character, |
decavg |
logical, if |
variable |
|
This function downloads climate data sets from Scenarios Network for Alaska and Arctic Planning based on the data set id
and specification of the region or point location of interest.
For regional climate data, annual statistics with a temporal resolution of monthly, 3-month seasonal and full annual period are based on regional spatial climate variable distribution samples at the respective resolution.
Statistics include:
mean
standard deviation
minimum
maximum
quantiles: 0.025, 0.05, 0.10, 0.25, 0.50 (median), 0.75, 0.90, 0.95 and 0.975.
Comparatively, point location data sets do not include statistics regarding the surrounding spatial distribution of values.
Only the Mean
column is retained in these tables.
Seasonal and annual aggregate statistics represent means for temperature variables and totals for precipitation.
Note that decadal averages are strictly as their name suggests: decadal means of each statistic at the respective intra-annual time steps.
E.g., decavg = TRUE
returns a data frame including the mean of ten annual 95th percentile values,
not the 95th percentile of the spatial climate variable distribution at a decadal resolution.
For something like the latter, this can be computed from raw distribution data.
Data sets are retrieved for specific locations. For the smaller, decadal resolution data sets, there is an option to download
all point locations in one table with area = "points"
(requires decavg = TRUE
),
but in this case it must be requested for a specific climate variable to further reduce the download size to no more than 24
MB compressed for all 3,867 point locations.
In general, if variable = NULL
, all available climate variables are retained. In the case of area = "points"
,
a specific climate variable must be provided or it will default to temperature (tas
).
a data frame.
1 | climdata("ar5stats", "AK-CAN")
|
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