What is a climate reanalysis?

What is climate reanalysis? A climate reanalysis gives a numerical description of the recent climate, produced by combining models with observations. Climate reanalyses generate large datasets that can take up several petabytes of space, and are best processed with cloud-based tools, to avoid large download volumes.

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 reanalysis data used for?

Reanalysis data are being used by a wide range of applications: monitoring climate change, research, education, policy-making and business, in sectors such as renewable energy and agriculture. ERA5 is a very popular dataset among users of the C3S Climate Data Store.

What is ERA-Interim reanalysis?

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 does ERA5 mean?

ECMWF Reanalysis 5th Generation
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 ).

What is ERA5?

ERA5 is the fifth generation ECMWF atmospheric reanalysis of the global climate covering the period from January 1950 to present. 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.

How does the ECMWF model work?

ECMWF supports research on climate variability using an approach known as reanalysis. This involves feeding weather observations collected over decades into a NWP system to recreate past atmospheric, sea- and land-surface conditions over specific time periods to obtain a clearer picture of how the climate has changed.

What is merra data?

The Modern-Era Retrospective analysis for Research and Applications (MERRA) dataset was released in 2009. It is based on a version of the GEOS-5 atmospheric data assimilation system that was frozen in 2008. MERRA data span the period 1979 through February 2016 and were produced on a 0.5° × 0.66° grid with 72 layers.

What does Ecmwf stand for?

European Centre for Medium-Range Weather Forecasts
The European Centre for Medium-Range Weather Forecasts (ECMWF) is an independent intergovernmental organisation supported by 34 states. ECMWF is both a research institute and a 24/7 operational service, producing and disseminating numerical weather predictions to its Member States.

What does ECMWF stand for?

What is the resolution of ERA5?

Meteorology

ERA-Interim
Production period August 2006 – end 2018
Assimilation system IFS Cycle 31r2
Model input As in operations (inconsistent SST)
Spatial resolution 79 km globally, 60 levels to 0.1 hPa

Is ECMWF better than GFS?

So which model is generally speaking more accurate? Statistically speaking, the very clear answer is that the ECMWF consistently performs better than the GFS, as the model skill score graph above shows.

When was the last ECMWF reanalysis of the atmosphere?

ERA-40 is an ECMWF re-analysis of the global atmosphere and surface conditions for 45-years, over the period from September 1957 through August 2002. More details…

How does the ECMWF reanalyse archived data?

ECMWF periodically uses its forecast models and data assimilation systems to ‘reanalyse’ archived observations, creating global data sets describing the recent history of the atmosphere, land surface, and oceans. The essence of this process, which provides consistent and convenient ‘maps without gaps’, is explained in this animation.

Which is the latest version of the ECMWF?

The latest ECMWF reanalysis is ERA5, which is being produced by C3S. ERA5 provides a snapshot of the atmosphere, land surface and ocean waves for each hour from 1979 onwards (for 1950 to 1978 a preliminary version is available).

What kind of research is done at ECMWF?

Current research at ECMWF focuses on the development of consistent reanalyses of the coupled climate system, including atmosphere, land surface, ocean, sea ice, and the carbon cycle, extending back as far as a century or more. An additional research topic is directed towards an improved handling of systematic model bias.