Kinetic Energy Climatology and Effective Resolution for the ERA5 Reanalysis

2021 ◽  
Author(s):  
Pedro Bolgiani ◽  
Carlos Calvo-Sancho ◽  
Javier Díaz-Fernández ◽  
Lara Quitián-Hernández ◽  
Mariano Sastre ◽  
...  
Keyword(s):  
Energy Density ◽  
Kinetic Energy ◽  
North Atlantic ◽  
State Of The Art ◽  
Limited Area ◽  
The North ◽  
Synoptic Conditions ◽  
North Atlantic Area ◽  
Atlantic Area

Abstract ERA5 represents the state of the art for atmospheric reanalyses and is widely used in meteorological and climatological research. In this work, this dataset is evaluated using the wind kinetic energy spectrum. Seasonal climatologies are generated for 30º latitudinal bands in the Northern Hemisphere (periodic domain) and over the North Atlantic area (limited-area domain). The spectra are also assessed to determine the effective resolution of the reanalysis. The results present notable differences between the latitudinal domains, indicating that ERA5 is properly capturing the synoptic conditions. The seasonal variability is adequate too, being winter the most energetic, and summer the least energetic season. The limited area domain results introduce a larger energy density and range. Despite the good results for the synoptic scales, the reanalysis' spectra are not able to properly reproduce the dissipation rates at mesoscale. This is a source of uncertainties which needs to be taken into account when using the dataset. Finally, a cyclone tropical transition is presented as a case study. The spectrum generated shows a clear difference in energy density at every wavelength, as expected for a highly-energetic status of the atmosphere.

Zonal index and circulation change in the north Atlantic area, 1873-1972

1982 ◽  
Vol 2 (2) ◽  
pp. 159-169 ◽  
Author(s):  
T. J. Makrogiannis ◽  
A. A. Bloutsos ◽  
B. D. Giles
Keyword(s):  
North Atlantic ◽  
Zonal Index ◽  
The North ◽  
Circulation Change ◽  
The North Atlantic ◽  
North Atlantic Area ◽  
Atlantic Area

scholarly journals The onset of the North Atlantic Igneous Province in a rifting perspective

2009 ◽  
Vol 146 (3) ◽  
pp. 309-325 ◽  
Author(s):  
J. HANSEN ◽  
D. A. JERRAM ◽  
K. McCAFFREY ◽  
S. R. PASSEY
Keyword(s):  
North Atlantic ◽  
Regional Scale ◽  
The North ◽  
Time Space ◽  
Lithospheric Extension ◽  
Igneous Province ◽  
The North Atlantic ◽  
North Atlantic Igneous Province ◽  
North Atlantic Area ◽  
Atlantic Area

AbstractThe processes that led to the onset and evolution of the North Atlantic Igneous Province (NAIP) have been a theme of debate in the past decades. A popular theory has been that the impingement on the lower lithosphere of a hot mantle plume (the ‘Ancestral Iceland’ plume) initiated the first voluminous outbursts of lava and initiated rifting in the North Atlantic area in Early Palaeogene times. Here we review previous studies in order to set the NAIP magmatism in a time–space context. We suggest that global plate reorganizations and lithospheric extension across old orogenic fronts and/or suture zones, aided by other processes in the mantle (e.g. local or regional scale upwellings prior to and during the final Early Eocene rifting), played a role in the generation of the igneous products recorded in the NAIP for this period. These events gave rise to the extensive Paleocene and Eocene igneous rocks in W Greenland, NW Britain and at the conjugate E Greenland–NW European margins. Many of the relatively large magmatic centres of the NAIP were associated with transient and geographically confined doming in Early Paleocene times prior to the final break-up of the North Atlantic area.

North Atlantic Council

1950 ◽  
Vol 4 (4) ◽  
pp. 694-697
Keyword(s):  
North Atlantic ◽  
The West ◽  
The North ◽  
Effective System ◽  
Speed Up ◽  
The North Atlantic ◽  
Defense Production ◽  
Economic Construction ◽  
North Atlantic Area ◽  
Atlantic Area

The first series of meetings of the Council of Deputies opened in London on July 25 under the chairmanship of Charles M. Spofford (United States). Upon adjournment of the Council on July 28 for discussion with members' respective governments, a statement was issued saying that “practical measures required to build up the defences of the west in the shortest possible time” had been discussed. The deputies unanimously agreed that the deterioration in the world situation created by the situation in Korea made it more important than ever for the North Atlantic Treaty states to speed up their common defense. They recognized “the need for maintaining and safeguarding the economic construction and stability of the North Atlantic area”, the communiqué continued, but agreed that this depended on establishment of an effective system of integrated defense. The deputies noted the additional effort already announced by several members of the treaty countries and unanimously approved certain recommendations to accelerate defense production, including a request for greater expenditures on defense.

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