Apply Statistical Post-Processing to Improve Sea Ice Predictions


[Up] [Top]

Documentation for package ‘IceCast’ version 2.1.0

Help Pages

all_regions Polygon of all regions
any_intersect Check if a line has intersecting segments
bg_water Polygon of the non-regional ocean
bound_info Get boundary info
calc_pars Compute Parameters Estimates
censor Truncate simulated line lengths based on a list of bounds
check_intersect Check if line segments intersect
clim_9_2005_2007 Climatology forecast for 2005-2007.
clim_9_2008 Climatology forecast for 2008.
cond_prob Compute conditional probability of observed event
contig_zero Find indices of sequences of contiguous zeros
contour_shift Apply contour-shifting to bias correct
conv_to_grid Convert 'SpatialPolygons' object to a grid
create_mapping Map a set of observations and predictions
currSecEx Coordinates of a line segment with self-intersections
discrep Discrepancy maps for September 1993-2007 (lead time 2.5-months)
dist_mat Compute 'distances' among $n$ lines
ecmwf_bin Binary predictions from ECMWF ensemble, September 1993-2018
extract_coords Function to extract coordinates.
find_trans Find transition points (points at the start/end of polygons)
fit_cont_pars Sets up MCMC to fit the parameters of the contour Model in R, then runs the sampler in C++
fit_weights Compute weighting between two models
full Sample collection of completely ice-filled regions
gen_cont Generate contours
get_area Calculate geodesic area
get_coords Extract coordinates from a spatial object of lines and points
get_dist Find euclidean distance
get_ind Find indices in matrix
get_init_month Get initialization month
get_map Map one observation or prediction
get_region Get polygons corresponding to regions
indiv_poly Generate an individual polygon from a set of points
interEx Example of a line that contains self-intersections
interp_new_pts Interpolate along region boundaries
inter_start_line Add points where line connecting point sequence crosses start_line
int_line Space points along a line
keep_line Keep only spatial lines
keep_poly Keep only spatial polygons
land Polygon of land
land_mat Binary matrix indicating where there is land
make_polygons Create polygon from mapped points
mappedPoints Example of mapped points
mapxy Get geodetic latitudes and longitudes
map_curr_1 Sample output from 'get_map'
merged Sample list of contours
merge_conts Merge contours
obsLEx Coordinates of an observed line segment
obsSep2006_2007 Observed sea ice September 2006-2007
obsSep2008 Observed sea ice September 2008
obs_9_2005_2007 Observed sea ice for September 2005-2007
obs_9_2008 Observed sea ice for September 2008
obs_maps Output from 'create_mapping' function
pars_1 Sample parameter information for generating a contour
ppe_9_2005_2007 Post-procesed ensemble forecast for 2005-2007
ppe_9_2008 Post-procesed ensemble forecast for 2008
predLEx Coordinates of a predicted line segment
pred_maps Computed mappings for predictions for September 1993-2008
prob_map Get probabilities on a grid from contours
prop_area Proportion of total area by grid box
pt_line_inter Check if a point crosses a line segment
quick_run Simple evaluation of contour-shifting
read_bootstrap Read individual bootstrap binary file
read_monthly_BS Read in a set of bootstrap observations over a set of year
reg_info List of information about each region
rm_holes Remove holes in a polygon
RunMCMC Run MCMC to Fit Contour Model
sec_to_interp Interpolate a section of line
sipSep2006_2007 Ensemble sea ice probability for September 2006-2007 (lead time 2.5 months)
sipSep2008 Ensemble estimated sea ice probability September 2008 (lead time 2.5 months)
spatialCollEx Spatial collection example
to_fit Identify fully ice-covered and ice-free regions
train_ind Find indices on which to train contour model
ts_adj_mu Trend Adjustment For 'mu'
untwist Remove self-intersections
untwist_sec Remove self-intersections from one section of a contour
wght_mod Function to weight two models
y_obs Compute y