What is ERA-interim data?

What is ERA-interim data?

ERA-Interim is a global atmospheric reanalysis from 1979, continuously updated in real time. The data products include a variety of surface parameters, describing weather as well as ocean-wave and land-surface conditions.

What are the changes from era-interim to ERA5?

ERA-Interim contains about 100 parameters on surface and single level alone, plus parameters on other level types. ERA5 contains over 240 parameters on surface and single level alone, plus parameters on other level types.

How do I download era-interim data?

3. Download a data sample

1. Go to ECMWF Web User Interface for ERA-Interim.
2. Make sure you are logged in with your ECMWF user ID (top right of the page)
3. In the left hand menu select if you want daily or monthly data, and surface, pressure levels or model levels.
4. Select the time period you want to download.

What does ERA stand for in ERA5?

Acronym ERA5 Name ECMWF Reanalysis 5th Generation Description. ERA5 is the fifth generation of ECMWF atmospheric reanalyses of the global climate (http://climate.copernicus.eu/products/climate-reanalysis ).

How do I download ERA5 data?

3 – Downloading online ERA5 family data through the CDS web interface

1. Go to the C3S climate data store (CDS).
2. Type ‘ERA5’ in the search box.
3. Follow the ERA5 dataset title link of interest (there will be many more hits).
4. Currently there are eight online ERA5 and two ERA5-Land catalogue entries.

What is a reanalysis dataset?

Reanalysis datasets are created by assimilating (“inputting”) climate observations using the same climate model throughout the entire reanalysis period in order to reduce the affects of modeling changes on climate statistics.

What is the JRA 55 project?

JRA-55 is the first comprehensive reanalysis to cover the last half-century since the European Centre for Medium-Range Weather Forecasts 45-year Reanalysis (ERA-40, Uppala et al. 2005), and is also the first to apply four-dimensional variational analysis (4D-Var) to this period.

What does Era mean?

Earned run average
Earned run average represents the number of earned runs a pitcher allows per nine innings — with earned runs being any runs that scored without the aid of an error or a passed ball. ERA is the most commonly accepted statistical tool for evaluating pitchers.

What is Expver in ERA5 data?

‘For netCDF requests which return a mixture of ERA5 and ERA5T data a new dimension is created called expver containing 1 and 5. A single time coordinate is used which covers the entire requested period’.

Where does ERA5 data come from?

ERA5 is produced by the Copernicus Climate Change Service (C3S) at ECMWF. ERA5 provides hourly estimates of a large number of atmospheric, land and oceanic climate variables. The data cover the Earth on a 30km grid and resolve the atmosphere using 137 levels from the surface up to a height of 80km.

What are reanalysis products?

Reanalysis products are used extensively in climate research and services, including for monitoring and comparing current climate conditions with those of the past, identifying the causes of climate variations and change, and preparing climate predictions.

What is the latest version of ERA Interim?

ERA-Interim. ERA-Interim is a global atmospheric reanalysis that is available from 1 January 1979 to 31 August 2019. It has been superseded by the ERA5 reanalysis. The data assimilation system used to produce ERA-Interim is based on a 2006 release of the IFS (Cy31r2).

What is the resolution of the era-interim archive?

The spatial resolution of the data set is approximately 80 km (T255 spectral) on 60 levels in the vertical from the surface up to 0.1 hPa. For a detailed documentation of the ERA-Interim Archive see Berrisford et al. (2011) .

What is the era-interim atmospheric model?

The ERA-Interim atmospheric model is coupled ocean-wave model resolving 30 wave frequencies and 24 wave directions at the nodes of its reduced latitude/longitude grid. Wave data can be downloaded using the same mechanisms as atmospheric data.

What is ‘ since previous post-processing’ in ERA-Interim?

In ERA-Interim there are some parameters named ‘…since previous post-processing’, for example ‘Maximum temperature at 2 metres since previous post-processing’. This represents the maximum temperature between the previous archived forecast ‘Step’ and the forecast ‘Step’.