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Available products

Julie edited this page Sep 26, 2022 · 36 revisions

Available products: The spatial coverage and what the abbreviations mean

The available CaSPAr products are:

1a. Global Ensemble Prediction System (GEPS; archived 06/2017 - 05/2021)
1b. Global Ensemble Prediction System - North America subset (GEPS_NA; archived since 05/2021)
2. Global Deterministic Prediction System (GDPS; archived since 06/2017)
3. Regional Ensemble Prediction System (REPS; archived since 06/2017)
4. Regional Deterministic Prediction System (RDPS; archived since 01/2015)

GEPS GDPS REPS RDPS
  1. Regional Deterministic Reforecast System (RDRS_v1; hourly dataset from 01/2010 to 12/2014)
  2. Regional Deterministic Reforecast System (RDRS_v2; hourly dataset from 01/2000 to 12/2017)
  3. Regional Deterministic Reforecast System (RDRS_v2.1; hourly dataset from 01/1980 to 12/2018)
RDRS_v1 RDRS_v2 RDRS_v2.1
  1. High-Resolution Deterministic Prediction System (HRDPS; archived since 06/2017)
  2. Canadian Land Data Assimilation System (CaLDAS; archived since 06/2017)
HRDPS CaLDAS
  1. Canadian Precipitation Analysis- coarse resolution experimental (CaPA_coarse_exp; archived Jan 1, 2002 to Jun 30, 2012)
  2. Canadian Precipitation Analysis- coarse resolution operational (CaPA_coarse; archived since 09/2012)
  3. Canadian Precipitation Analysis- fine resolution experimental (CaPA_fine_exp; archived June 1, 2017 to March 2, 2018)
  4. Canadian Precipitation Analysis- fine resolution operational (CaPA_fine; archived since March 3, 2018)
CaPA_coarse_exp CaPA_coarse CaPA_fine_exp CaPA_fine

Available products: A table with specifics

The details of the archived products are given in the table below. Please be aware that these specifications are subject to changes. The presented details are valid between June 2017 and December 2017.

Product Docu Archived since Archived until Forecasted time steps [h] Issues Ensemble size Number of variables Resolution Memory [GB/month]
GEPS changelog/
docu
2017-05-23 2021-05-20 1,2,..., 72, 96,..., 384 2/day 21 55 ~50.0km 6700
GEPS_NA1) changelog/
docu
2021-05-07 today 1,2,..., 72, 96,..., 384 2/day 21 55 ~39.0km 895
GDPS changelog/
docu
2017-05-22 today 1,2,..., 144, 147,..., 240 2/day 1 55 ~15.0km 506
REPS changelog/
docu
2017-05-23 today 1,2,..., 72 2/day 21 52 ~10.0km 1902
RDPS changelog/
docu
2015-01-01 today 1,2,..., 84 4/day 1 55 ~10.0km 723
RDRS_v12) pdf 2010-01-01 2014-12-31 1,2,..., 24 1/day 1 12 ~15.0km 5
RDRS_v22) pdf 2000-01-01 2017-12-31 1,2,..., 24 1/day 1 28
(list)
~10.0km 21
RDRS_v2.12) pdf 1980-01-01 2018-12-31 1,2,..., 24 1/day 1 28
(list)
~10.0km 21
HRDPS changelog/
docu
2017-05-22 today 1,2,..., 48 4/day 1 50 ~2.5km 910
CaLDAS 2017-05-22 today N/A 8/day 25 14 ~2.5km 281
CaPA_coarse_exp3) changelog/
docu
2002-01-01 2012-06-30 N/A 4/day 1 2 ~10.0km 1
CaPA_coarse3) changelog/
docu
2012-09-17 today N/A 4/day 1 2 ~10.0km 1
CaPA_fine_exp3) changelog/
docu
2016-06-01 2018-03-02 N/A 4/day 1 2 ~2.5km 2
CaPA_fine3) changelog/
docu
2018-02-02 today N/A 4/day 1 2 ~2.5km 2

1) The GEPS_NA product is exactly the same as GEPS (variables, resolution, horizons, etc); it is only cropped to the domain of North America for the purpose of saving storage.
2) There is a discontinuity at the very south of the domain (see here). This is due to differences in the domains of the system components (CaLDAS, RDPS and CaPA ) used to produce RDRS. To avoid this discontinuity, you should disregard the 30-40 most southern rows of grid cells available in the reanalysis products. The problem exists in RDRS_v1, RDRS_v2 and RDRS_v2.1 but will be resolved in later versions.
3) The CaPA products available are the 6h accumulations. There also exists 24h accumulations which might be added to CaSPAr in future.

More information might be available on this ECCC website. You can find some more information about file naming conventions and some variables on another CaSPAr wiki page here.

Variables available in the Regional Deterministic Reanalysis System (RDRS-v2 and RDRS-v2.1)

The publication describing and evaluating this product is available here.

The data have an hourly temporal resolution and a spatial resolution of about 10 km. It is available for 18 years (2000 to 2017) for RDRS-v2 and 39 years (1980-2018) for RDRS-v2.1. The dataset covers North and Central America.

About precipitation fields

The RDRS-v2 and RDRS-v2.1 product contain two precipitation variables:

  • RDRS_v2_P_PR0_SFC/RDRS_v2.1_P_PR0_SFC: Model forecasted precipitation (background field used by CaPA to produce the analysis) labelled with etiquette RDRS02PROD in the original FST files provided by ECCC and called as RDRS_v2_P_PR0_SFC/RDRS_v2.1_P_PR0_SFC in the NetCDF files provided through CaSPAr
  • RDRS_v2_A_PR0_SFC/RDRS_v2.1_A_PR0_SFC: Analyzed precipitation labelled with etiquette MODEL+CaPA24h in the original FST files provided by ECCC and called as RDRS_v2_A_PR0_SFC/RDRS_v2.1_A_PR0_SFC in the NetCDF files provided through CaSPAr

Procedures to calculate final off-line hourly precipitation:

  1. CaPA-6h is disaggregated to an hourly time step by linearly rescaling the atmospheric model’s hourly precipitation rates in order to match the 6-h accumulations estimated by CaPA-6h.
  2. The same procedure is applied to the CaPA-24h precipitation analysis, but using the disaggregated CaPA-6h product as the reference.

In cases where the model precipitation was negligible, but precipitation was observed, a constant precipitation rate was assumed for that time period. You can find some more information about file naming conventions and some variables on another CaSPAr wiki page here.

How the forcing files provided in CaSPAr are constructed

The reanalysis is originally executed twice per day at 00Z and 12Z UTC (internally as fst files). Each of these two run performs 24 h forecasts. For example, the reanalysis issued for Dec 2, 2004 at 12Z UTC (namely 2004120212.nc) is covering the period from Dec 2, 2004 13h to Dec 3, 2004 12h. It is built by stitching together the following forecasts:

  • 13-18 h UTC forecast from 00Z run (2004120200_013.fst to 2004120200_018.fst) gives hours 13-18 UTC in the final file 2004120212.nc distributed through CaSPAr.
  • 7-18 h UTC forecast from 12Z run (2004120212_007.fst to 2004120212_018.fst) gives hours 19-24 UTC in the final file 2004120212.nc and 1-6 UTC in the final file 2004120312.nc.
  • 7-12 h UTC forecast from the next day 00Z run (2004120300_007.fst to 2004120300_012.fst) gives hours 7-12 UTC in the final file 2004120312.nc.

List of available variables in RDRS-v2 and RDRS-v2.1

The variables available in the dataset are listed in the following table. You can find some more useful information about specific variables on another CaSPAr wiki page here.

Variable Variable long name Unit Level
RDRS_v2_P_PR0_SFC
RDRS_v2.1_P_PR0_SFC
Quantity of precipitation (model) [m] SFC
RDRS_v2_A_PR0_SFC
RDRS_v2.1_A_PR0_SFC
Quantity of precipitation (CaPA) [m] SFC
RDRS_v2_P_TT_1.5m
RDRS_v2.1_P_TT_1.5m
Air temperature [°C] 1.5m
RDRS_v2_P_TT_09944
RDRS_v2.1_P_TT_09944
Air temperature [°C] ~40m
RDRS_v2_P_FB_SFC
RDRS_v2.1_P_FB_SFC
Downward solar flux [W/m2] SFC
RDRS_v2_P_FI_SFC
RDRS_v2.1_P_FI_SFC
Surface incoming infrared flux [W/m2] SFC
RDRS_v2_P_HR_1.5m
RDRS_v2.1_P_HR_1.5m
Relative humidity (fraction) [-] 1.5m
RDRS_v2_P_HR_09944
RDRS_v2.1_P_HR_09944
Relative humidity (fraction) [-] ~40m
RDRS_v2_P_HU_1.5m
RDRS_v2.1_P_HU_1.5m
Specific humidity [kg/kg] 1.5m
RDRS_v2_P_HU_09944
RDRS_v2.1_P_HU_09944
Specific humidity [kg/kg] ~40m
RDRS_v2_P_P0_SFC
RDRS_v2.1_P_P0_SFC
Surface pressure [mb] SFC
RDRS_v2_P_PN_SFC
RDRS_v2.1_P_PN_SFC
Sea level pressure [mb] SFC
RDRS_v2_P_TD_1.5m
RDRS_v2.1_P_TD_1.5m
Dew point temperature [°C] 1.5m
RDRS_v2_P_TD_09944
RDRS_v2.1_P_TD_09944
Dew point temperature [°C] ~40m
RDRS_v2_P_UU_10m
RDRS_v2.1_P_UU_10m
U-component of the wind (along the grid X axis) kts 10m
RDRS_v2_P_VV_10m
RDRS_v2.1_P_VV_10m
V-component of the wind (along the grid Y axis) kts 10m
RDRS_v2_P_UUC_10m
RDRS_v2.1_P_UUC_10m
corrected U-component of the wind (along West-East direction) kts 10m
RDRS_v2_P_VVC_10m
RDRS_v2.1_P_VVC_10m
corrected V-component of the wind (along South-North direction) kts 10m
RDRS_v2_P_UVC_10m
RDRS_v2.1_P_UVC_10m
Wind Modulus (derived using UU and VV) kts 10m
RDRS_v2_P_WDC_10m
RDRS_v2.1_P_WDC_10m
Meteorological wind direction (derived using UU and VV) [degree] 10m
RDRS_v2_P_UU_09944
RDRS_v2.1_P_UU_09944
U-component of the wind (along the grid X axis) kts ~40m
RDRS_v2_P_VV_09944
RDRS_v2.1_P_VV_09944
V-component of the wind (along the grid Y axis) kts ~40m
RDRS_v2_P_UUC_09944
RDRS_v2.1_P_UUC_09944
corrected U-component of the wind (along West-East direction) kts ~40m
RDRS_v2_P_VVC_09944
RDRS_v2.1_P_VVC_09944
corrected V-component of the wind (along South-North direction) kts ~40m
RDRS_v2_P_UVC_09944
RDRS_v2.1_P_UVC_09944
Wind Modulus (derived using UU and VV) kts ~40m
RDRS_v2_P_WDC_09944
RDRS_v2.1_P_WDC_09944
Meteorological wind direction (derived using UU and VV) [degree] ~40m
RDRS_v2_P_GZ_10000
RDRS_v2.1_P_GZ_10000
Geopotential height dam SFC
RDRS_v2_P_GZ_09944
RDRS_v2.1_P_GZ_09944
Geopotential height dam ~40m

Remarks: Variable names are following the convention <Product>_<Type:A=Analysis,P=Prediction>_<ECCC name>_<Level/Tile/Category>. Variables with level 10000 are at surface level. The height [m] of variables with level 0XXXX needs to be inferred using the corresponding fields of geopotential height (GZ_0XXXX - GZ_10000). The variables UUC, VVC, UVC, and WDC are not modelled but inferred from UU and VV for convenience of the users.