An assessment of early 20th Century Antarctic pressure reconstructions using historical observations
Ryan L. Fogt,Connor P. Belak,Julie M. Jones,Laura C. Slivinski,Laura C. Slivinski,Gilbert P. Compo,Gilbert P. Compo +6 more
TLDR
While gridded seasonal pressure reconstructions poleward of 60°S extending back to 1905 have been recently completed, their skill has not been assessed prior to 1958 to provide a more thorough evaluation of the skill and performance in the early 20th century as mentioned in this paper.Abstract:
While gridded seasonal pressure reconstructions poleward of 60°S extending back to 1905 have been recently completed, their skill has not been assessed prior to 1958 To provide a more thorough evaluation of the skill and performance in the early 20th century, these reconstructions are compared to other gridded datasets, historical data from early Antarctic expeditions, ship records, and temporary bases
Overall, the comparison confirms that the reconstruction uncertainty of 2–4 hPa (evaluated after 1979) over the Southern Ocean is a valid estimate of the reconstruction error in the early 20th century Over the interior and near the coast of Antarctica, direct comparisons with historical data are challenged by elevation‐based reductions to sea level pressure In a few cases, a simple linear adjustment of the reconstruction to sea level matches the historical data well, but in other cases, the differences remain greater than 10 hPa Despite these large errors, comparisons with continuous multi‐season observations demonstrate that aspects of the interannual variability are often still captured, suggesting that the reconstructions have skill representing variations on this timescale, even if it is difficult to determine how well they capture the mean pressure at these higher elevations Additional comparisons with various 20th century reanalysis products demonstrate the value of assimilating the historical observations in these datasets, which acts to substantially reduce the reanalysis ensemble spread, and bring the reanalysis ensemble mean within the reconstruction and observational uncertaintyread more
Citations
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Extratropical Southern Hemisphere Synchronous Pressure Variability in the Early Twentieth Century
An Exceptional Summer during the South Pole Race of 1911-1912
TL;DR: In this article, the meteorological conditions during the Amundsen and Scott South Pole expeditions in 1911/12 were examined using a combination of observations collected during the expeditions as well as modern reanalysis and reconstructed pressure datasets.
References
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Journal ArticleDOI
The ERA-Interim reanalysis: configuration and performance of the data assimilation system
Dick Dee,S. Uppala,Adrian Simmons,Paul Berrisford,Paul Poli,Shinya Kobayashi,Ulf Andrae,Magdalena Balmaseda,Gianpaolo Balsamo,Peter Bauer,Peter Bechtold,Anton Beljaars,L. van de Berg,Jean Bidlot,Niels Bormann,C. Delsol,Rossana Dragani,Manuel Fuentes,Alan J. Geer,Leopold Haimberger,Sean Healy,Hans Hersbach,Elías Hólm,Lars Isaksen,P. Kallberg,Martin Köhler,Marco Matricardi,A. P. McNally,B. M. Monge-Sanz,Jean-Jacques Morcrette,B.-K. Park,Carole Peubey,P. de Rosnay,Christina Tavolato,Jean-Noël Thépaut,Frederic Vitart +35 more
TL;DR: ERA-Interim as discussed by the authors is the latest global atmospheric reanalysis produced by the European Centre for Medium-Range Weather Forecasts (ECMWF), which will extend back to the early part of the twentieth century.
Journal ArticleDOI
The Twentieth Century Reanalysis Project
Gilbert P. Compo,Gilbert P. Compo,Jeffrey S. Whitaker,Prashant D. Sardeshmukh,Prashant D. Sardeshmukh,N. Matsui,N. Matsui,Rob Allan,Xiaojun Yin,Byron E. Gleason,Russell S. Vose,Glenn Rutledge,P. Bessemoulin,Stefan Brönnimann,Stefan Brönnimann,Manola Brunet,Manola Brunet,R. Crouthamel,Andrea Grant,Pavel Ya. Groisman,Pavel Ya. Groisman,Philip Jones,Michael C. Kruk,Andries Kruger,Gareth J. Marshall,Maurizio Maugeri,H. Mok,Øyvind Nordli,Tom Ross,Ricardo M. Trigo,Xiaolan L. Wang,Scott D. Woodruff,Steven J. Worley +32 more
TL;DR: The Twentieth Century Reanalysis (20CR) dataset as discussed by the authors provides the first estimates of global tropospheric variability, and of the dataset's time-varying quality, from 1871 to the present at 6-hourly temporal and 2° spatial resolutions.
Journal ArticleDOI
Ice-Shelf Melting Around Antarctica
TL;DR: Detailed glaciological estimates of ice-shelf melting around the entire continent of Antarctica show that basal melting accounts for as much mass loss as does calving, making ice- shelf melting the largest ablation process in Antarctica.
Journal ArticleDOI
ERA-20C: An Atmospheric Reanalysis of the Twentieth Century
Paul Poli,Hans Hersbach,Dick Dee,Paul Berrisford,Adrian Simmons,Frederic Vitart,Patrick Laloyaux,David G. H. Tan,Carole Peubey,Jean-Noël Thépaut,Yannick Trémolet,Elías Hólm,Massimo Bonavita,Lars Isaksen,Michael Fisher +14 more
TL;DR: The ERA-20C water cycle features stable precipitation minus evaporation global averages and no spurious jumps or trends as mentioned in this paper, and the assimilation of observations adds realism on synoptic time scales.
Journal ArticleDOI
A new globally complete monthly historical gridded mean sea level pressure dataset (HadSLP2): 1850-2004
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TL;DR: HadSLP2 as mentioned in this paper is an upgraded version of the Hadley Centre's monthly historical mean sea level pressure (MSLP) dataset (HadSLp2) which covers the period from 1850 to date, and is based on numerous terrestrial and marine data compilations.