EMD-WRF South Africa: Difference between revisions

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[[Category:Online Data]][[Category:Wind Data]]
[[Category:Online Data]][[Category:Wind Data]]
[[File:southafrica_cutdown.png|500px|right|thumb|Illustration of the Data Coverage of the EMD-WRF South Africa Dataset]]
[[Image:SouthAfrica100mWinds.png|500px|right|thumb|Illustration of the Data Coverage of the EMD-WRF South Africa Dataset]]




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The dataset covers South Africa, Swaziland and Lesotho as well as part of Namibia and Botswana. The model domain for EMD-WRF South Africa is shown in the figure to the right.
The dataset covers South Africa, Swaziland and Lesotho as well as part of Namibia and Botswana. The model domain for EMD-WRF South Africa is shown in the figure to the right.


Note: This dataset requires an additional license (see below).
Please Note:  
* This dataset is no longer updated; last available data is august 2019.
* It is feely available to windPRO users with an active service subscription (see below).
* If you need updated mesoscale data from within this region, please consider the [[EMD-WRF_On-Demand_and_Custom-Area|EMD-WRF On-Demand Service]]


== Dataset Description  ==
== Dataset Description  ==
The mesoscale model is run at a spatial resolution of 0.029°x0.029°, approximately 3x3 km, and with hourly temporal resolution. ERA Interim data from ECMWF (http://www.ecmwf.int) is the global boundary data. The timespan of the data is back to 1994 and up until the latest available boundary data (see below for the Release Schedule).
The mesoscale model is run at a spatial resolution of 0.029°x0.029°, approximately 3x3 km, and with hourly temporal resolution. ERA Interim data from ECMWF (http://www.ecmwf.int) is the global boundary data. The timespan of the data is back to 1994 and up until the latest available boundary data (see below for the Release Schedule).
Data access is via WindPRO’s user friendly interface to on-line data and requires payment of an annual subscription fee.
Data access is via WindPRO’s user friendly interface to the on-line data.


== Release Schedule ==  
== Release Schedule ==  
Data is updated monthly with approximately 3 months delay defined by ERA Interim's availability. Before contacting support because of delays in the release schedule, please check ERA interim's availability on the [http://apps.ecmwf.int/datasets/data/interim-full-daily/ ERA availability page]. EMD-WRF South Africa data cannot be computed before ERA interim data is available.
This dataset is not updated anymore, as its source data (the ERA-Interim data) is no longer available. The dataset used to recieve monthly updates, with approximately 3 months delay defined by ERA Interim's availability and computational efforts regarding EMD's high-performance computer clusters.


When downloading the most recent data, please note that the last day of the last month will be missing until the next month is added. This is because, in order to compute a full day of data, the 24:00h (or 0:00 of following day) time stamp is required, but the last time stamp of a month in ERA interim data is 18:00 h.
== Usage Note: The EMD-WRF South Africa(ERA-Interim) dataset is discontinued at the end of 2019==
2020-02-20: The last month with ERA-Interim data was august 2019 as ECMWF has discontinued this dataset and has replaced it with the [[ERA5_Gaussian_Grid|ERA5 Data]]. EMD has ceased to update the EMD-WRF South Africa (ERA-Interim) dataset as the source data is no longer available.


== Validation ==
== Validation ==
The model-setup has been validated through various internal investigations on masts spatially distributed in the modelling area. <br>The findings (the correlations) are summarized in the datasheet available ([[Media:EMD-WRF_SouthAfrica-ProductSheet.pdf|here]]).<br>
The model-setup has been validated through various internal investigations on masts spatially distributed in the modelling area. <br>The findings (the correlations) are summarized in the datasheet available ([[Media:EMD-WRF_SouthAfrica-ProductSheet.pdf|here]]).<br>
In addition, the EMD-WRF modelling setup has been evaluated in a number of external benchmarks. <br> We have a separate [[EMD-WRF Benchmarks|EMD-WRF benchmark wiki-page]] that holds links to those investigations.
In addition, the EMD-WRF modelling setup has been evaluated in a number of external benchmarks. <br> We have a separate [[EMD-WRF Benchmarks|EMD-WRF Benchmark Wiki-Page]] that holds links to those investigations.


== Required modules/licenses ==
== Required modules/licenses ==
To access the EMD-WRF South Africa mesoscale data the following licenses/modules are required in your WindPRO setup:
To access the EMD-WRF South Africa mesoscale data the following licenses/modules are required in your WindPRO setup:
* Basis
* BASIS
* METEO
* METEO
* EMD-WRF South Africa
 
When the license fee is paid, you then have access to the full data-set without further cost. The price is available from the [http://www.emd.dk/windpro/online-ordering/price-list/ price-list on the EMD-homepage]. Downloading of data is unrestricted for licenced users, however a "fair use" policy applies. Unlicenced users may download three months of data from any point, however, multiple downloads are not allowed from the same point.
When the license fee for the modules aboce has been paid, you then have access to the full dataset without further cost. The price is available from the [http://www.emd.dk/windpro/price-list/data-sets/ price-list on the EMD-homepage]. Downloading of data is unrestricted for licenced users, however, a "fair use" policy applies. Unlicenced users may download three months of data from any point, however, multiple downloads are not allowed from the same point.
 
Visit [http://www.emd.dk/windpro/online-ordering/ EMD online ordering] to purchase the needed licences.


== Dataset Parameters ==  
== Dataset Parameters ==  
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|-
|-
|psfc
|psfc
|hPa
|Pa
|Pressure at site
|Pressure at site
|Instantaneous
|Instantaneous
|-
|-
|msl
|msl
|hPa
|Pa
|Pressure at mean sea level
|Pressure at mean sea level
|Instantaneous
|Instantaneous
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|snowDepth
|snowDepth
|m
|m
|Show depth (if present)
|Snow depth (if present)
|Instantaneous
|Instantaneous
|-
|-
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|-
|-
|totPrecip.s
|totPrecip.s
|kg/m^2/s
|kg/m^2
|Total Precipitation at surface
|Total Precipitation at surface
|1h Average
|1h Accumulated
|-
|-
|downShortWaveFlux.s
|downShortWaveFlux.s
Line 161: Line 167:
|-
|-
|cloudWater.100  
|cloudWater.100  
|kg/kg
|mg/kg
|Parameter intended for estimating probability of icing.<ref name="ice">CloudWater and cloudIcing values are extracted directly from the WRF meso-scale model and are normal output parameters of the same run as the other parameters (wind, temperature etc.). They are controlled by the WRF microphysics scheme for which Ferrier was used. For further information, please access the numerous internet resources about WRF use. EMD has not done any validation on the parameters, so they are provided as is.</ref>
|Parameter intended for estimating probability of icing.<ref name="ice">CloudWater and cloudIcing values are extracted directly from the WRF meso-scale model and are normal output parameters of the same run as the other parameters (wind, temperature etc.). They are controlled by the WRF microphysics scheme for which Ferrier was used. For further information, please access the numerous internet resources about WRF use. EMD has not done any validation on the parameters, so they are provided as is.</ref>
|Instantaneous
|Instantaneous
|-
|-
|cloudIce.100
|cloudIce.100
|kg/m^2
|mg/kg
|Parameter intended for estimating probability of icing. <ref name="ice"> </ref>
|Parameter intended for estimating probability of icing. <ref name="ice"> </ref>
|Instantaneous
|Instantaneous
|}
|}
== Attribution ==
If data from this dataset is used within any private or public disseminations, then EMD and its data providers must be acknowledged.
<pre>
Source:
EMD-WRF South Africa - Copyright (C) - EMD International A/S, 2019. Distribution through EMD and windPRO.
This dataset uses ERA-Iterim which is being developed through the European Centre for Medium-Range Weather Forecasts (ECMWF).
</pre>


== Footnotes ==
== Footnotes ==
<references />
<references />

Latest revision as of 10:59, 13 June 2022

Illustration of the Data Coverage of the EMD-WRF South Africa Dataset


Introduction and Model Domain

EMD-WRF South Africa is a high resolution mesoscale dataset modelled and provided by EMD International A/S. The dataset covers South Africa, Swaziland and Lesotho as well as part of Namibia and Botswana. The model domain for EMD-WRF South Africa is shown in the figure to the right.

Please Note:

  • This dataset is no longer updated; last available data is august 2019.
  • It is feely available to windPRO users with an active service subscription (see below).
  • If you need updated mesoscale data from within this region, please consider the EMD-WRF On-Demand Service

Dataset Description

The mesoscale model is run at a spatial resolution of 0.029°x0.029°, approximately 3x3 km, and with hourly temporal resolution. ERA Interim data from ECMWF (http://www.ecmwf.int) is the global boundary data. The timespan of the data is back to 1994 and up until the latest available boundary data (see below for the Release Schedule). Data access is via WindPRO’s user friendly interface to the on-line data.

Release Schedule

This dataset is not updated anymore, as its source data (the ERA-Interim data) is no longer available. The dataset used to recieve monthly updates, with approximately 3 months delay defined by ERA Interim's availability and computational efforts regarding EMD's high-performance computer clusters.

Usage Note: The EMD-WRF South Africa(ERA-Interim) dataset is discontinued at the end of 2019

2020-02-20: The last month with ERA-Interim data was august 2019 as ECMWF has discontinued this dataset and has replaced it with the ERA5 Data. EMD has ceased to update the EMD-WRF South Africa (ERA-Interim) dataset as the source data is no longer available.

Validation

The model-setup has been validated through various internal investigations on masts spatially distributed in the modelling area.
The findings (the correlations) are summarized in the datasheet available (here).
In addition, the EMD-WRF modelling setup has been evaluated in a number of external benchmarks.
We have a separate EMD-WRF Benchmark Wiki-Page that holds links to those investigations.

Required modules/licenses

To access the EMD-WRF South Africa mesoscale data the following licenses/modules are required in your WindPRO setup:

  • BASIS
  • METEO

When the license fee for the modules aboce has been paid, you then have access to the full dataset without further cost. The price is available from the price-list on the EMD-homepage. Downloading of data is unrestricted for licenced users, however, a "fair use" policy applies. Unlicenced users may download three months of data from any point, however, multiple downloads are not allowed from the same point.

Visit EMD online ordering to purchase the needed licences.

Dataset Parameters

A large quantity of useful parameters are available directly in WindPRO to aid in your analysis.
The different parameters in the EMD-WRF South Africa dataset that are available from within WindPRO are shown in the table below.

Table: Overview of EMD-WRF South Africa Dataset Parameters (3 km grid).
Parameter Unit Description Type
time UTC time stamp
psfc Pa Pressure at site Instantaneous
msl Pa Pressure at mean sea level Instantaneous
wSpeed.x m/s Wind speeds at different physical levels (x).
Heights (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m 		Instantaneous
wDir.x deg Wind speeds at different physical levels (x).
Heights (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m 		Instantaneous
wSpeed.0-30mb m/s Wind speeds at pressure level 0-30mb. Instantaneous
wDir.0-30mb deg Wind speeds at pressure levels 0-30mb. Instantaneous
wSpeed.850hpa m/s Wind speeds at pressure level 850hPa. Instantaneous
wDir.850hpa deg Wind speeds at pressure levels 850hPa. Instantaneous
temperature.x celcius Temperatures at different heights (x)
Heights (x): 2m and 100m 		Instantaneous
waterTemp celcius Water temperature Instantaneous
soilTemp.0-10cm celcius The temperature in the upper 10 cm of the soil Instantaneous
relHumidity.2 % Relative humidity in height 2m above ground level Instantaneous
snowDepth m Snow depth (if present) Instantaneous
vis.s m Visibility at surface Instantaneous
sensHeatFlux.s w/m2 Sensible Heat Flux at surface Instantaneous
totPrecip.s kg/m^2 Total Precipitation at surface 1h Accumulated
downShortWaveFlux.s w/m2 Downward shortwave irradiance at surface 1h Average
totalCloudCover.a % Total cloud cover in atmosphere 1h Average
convCloudCover.a % Convective cloud cover in atmosphere 1h Average
Data below this line are not shown in a default import of EMD-WRF South Africa data, but can be made available by clicking on the "+" button in the lower left corner of the import table.
4LFTX K N/A
rmol 1/m Inverse Monin-Obukhov-Length [1]
znt m Rougnhess length
sqrtTKE.x m/s Wind speed given as standard deviation in m/s. Derived from the turbulent kinetic energy (TKE).
Results available in different physical levels.
Heights (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m 		Instantaneous
cloudWater.100 mg/kg Parameter intended for estimating probability of icing.[2] Instantaneous
cloudIce.100 mg/kg Parameter intended for estimating probability of icing. [2] Instantaneous

Attribution

If data from this dataset is used within any private or public disseminations, then EMD and its data providers must be acknowledged. 

Source: 
EMD-WRF South Africa - Copyright (C) - EMD International A/S, 2019. Distribution through EMD and windPRO.
This dataset uses ERA-Iterim which is being developed through the European Centre for Medium-Range Weather Forecasts (ECMWF).

Footnotes

  1. ↑ It is still being investigated whether this inverse Monin-Obukhov-Length can be used for stability clasification.
  2. ↑ 2.0 2.1 CloudWater and cloudIcing values are extracted directly from the WRF meso-scale model and are normal output parameters of the same run as the other parameters (wind, temperature etc.). They are controlled by the WRF microphysics scheme for which Ferrier was used. For further information, please access the numerous internet resources about WRF use. EMD has not done any validation on the parameters, so they are provided as is.
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