EMD-WRF On-Demand and Custom-Area

Illustration of a EMD-Wrf Dataset in the windprospecting.com portal

Introduction

This pages holds the list of parameters available for datasets originating from the EMD-WRF On-Demand Services - either as a time-series product or as a custom-area run from a user-defined area.
You can find more information about the services at the following links:

1. Time-Series - On-Demand - for 'virtual met-masts'
2. Spatial Areas - On-Demand - for time-series within a larger domain and spatial climatic data

There is also a webinar describing the content of the different EMD-Mesoscale Services - it is accessible from the EMD-Youtube Channel:

• Webinar on Introduction to new EMD-WRF Mesocale Datasets

How to Order?

To get pointwise-timeseries data, you need meso-credits (one credit is worth one month of data). Credits can be ordered here:

• Time-Series: http://www.emd.dk/windpro/online-ordering/

To get meso-data for your own user-defined area, please select the area within the 'ordering' section of windPROSPECTING, then we will send you a quote:

• Spatial Data (along with time series): http://www.windprospecting.com/

Note:
In order to access windPROSPECTING, use either windPRO (from the 'Data' drop-down-menu) or make a 'demo'-user. You are also very welcome to contact our sales department on email: sales@emd.dk.

Data Availability

All EMD-WRF On-Demand data-services are available with global spatial coverage. The temporal availability and update frequency depends on a number of factors such as availability from the boundary data providers, bandwidth and download times, as well as availability on EMD high-performance computing and storage systems. The table below on outlines the availability of the different data-services.

Dataset	First date	Most recent date
EMD-WRF OD (ERA5) - gaussian grid forcing data	1999.01.01	7-10 days from end of last month
EMD-WRF OD (ERA5T) - rectangular grid forcing data	2010.01.01	7-10 days from end of last month
EMD-WRF OD (CFSR/CFS)	1994.01.01	1-2 days from end of last month
EMD-WRF OD (ERA-Interim)	1979.01.01	2019.08.31
EMD-WRF OD (MERRA2)	1979.01.01	2019.08.31

ERA5(T) and ERA5 as forcing data in the EMD-WRF OD model
During early December 2019, ECMWF released the ERA5(T) dataset. ERA5(T) is preliminary ERA5 data, but updated with a shorter five calender day delay. From summer 2022, ECMWF did make the ERA5(T) data available for the native, reduced Gaussian grid. This is a major improvement over the previous release schedule (before summer 2022), where the ERA5 Gaussian grid data came with a 2-3 month delay/lag due to ECMWF releases. Read more about ERA5 and ERA5T on our ERA5(T) Rectangular Grid dataset-page. The EMD-WRF OD services now uses both ERA5 (final) and ERA5(T) data, see more on the update schedule above.

Set of Standard Dataset Parameters

A large quantity of useful parameters are available directly in WindPRO to aid in your analysis.
The different parameters in each On-Demand dataset is shown in the list below.

Table: Overview of Standard EMD-WRF On-Demand 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 for EMD-WRF OD (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m Heights for EMD-WRF Custom Area (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m, 300m, 400m, 500m, 600m, 1000m, 4000m	Instantaneous
wDir.x	deg	Wind speeds at different physical levels (x). Heights for EMD-WRF OD (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m Heights for EMD-WRF Custom Area (x): 10m, 25m, 50m, 75m, 100m, 150m, 200m, 300m, 400m, 500m, 600m, 1000m, 4000m	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 On-Demand 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
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.	Instantaneous
cloudIce.100	mg/kg	Parameter intended for estimating probability of icing.	Instantaneous

Attribution

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

Source: 
EMD-WRF On-Demand and Custom-Area - Copyright (C) - EMD International A/S, 2019. Distribution through EMD and windPRO.
This service relies on the following data-providers: 
ERA5/ERA5T: Which is being developed through the Copernicus Climate Change Service (C3S) with data processing and distribution for ERA5/ERA5T is carried out by ECMWF. 
ERA-Interim: Is being developed through the European Centre for Medium-Range Weather Forecasts (ECMWF). 
MERRA-2: The Global Modeling and Assimilation Office of NASA (GMAO) for the MERRA-analysis and the GES DISC for the dissemination of MERRA. 
CFS/CFSR: NOAA / National Centers for Environmental Prediction (NCEP)