Assessing recent trends in high-latitude Southern Hemisphere surface climate

TitleAssessing recent trends in high-latitude Southern Hemisphere surface climate
Publication TypeJournal Article
Year of Publication2016
AuthorsJones J.M, Gille ST, Goosse H., Abram N.J, Canziani P.O, Charman D.J, Clem K.R, Crosta X., de Lavergne C., Eisenman I, England M.H, Fogt R.L, Frankcombe L.M, Marshall G.J, Masson-Delmotte V., Morrison A.K, Orsi A.J, Raphael M.N, Renwick J.A, Schneider D.P, Simpkins G.R, Steig E.J, Stenni B., Swingedouw D., Vance T.R
JournalNature Climate Change
Volume6
Pagination917-926
Date Published2016/10
Type of ArticleReview
ISBN Number1758-678X
Accession NumberWOS:000388292800013
Keywordsannular mode; antarctic sea-ice; CMIP5 models; level rise; ocean; part i; past millennium; pine island glacier; west antarctica; whaling records
Abstract

Understanding the causes of recent climatic trends and variability in the high-latitude Southern Hemisphere is hampered by a short instrumental record. Here, we analyse recent atmosphere, surface ocean and sea-ice observations in this region and assess their trends in the context of palaeoclimate records and climate model simulations. Over the 36-year satellite era, significant linear trends in annual mean sea-ice extent, surface temperature and sea-level pressure are superimposed on large interannual to decadal variability. Most observed trends, however, are not unusual when compared with Antarctic palaeoclimate records of the past two centuries. With the exception of the positive trend in the Southern Annular Mode, climate model simulations that include anthropogenic forcing are not compatible with the observed trends. This suggests that natural variability overwhelms the forced response in the observations, but the models may not fully represent this natural variability or may overestimate the magnitude of the forced response.

DOI10.1038/nclimate3103
Short TitleNat. Clim. Chang.
Student Publication: 
No