Aspects of the Year-to-Year Variation of Seasonal and Monthly Mean Station Temperature over the Southern Hemisphere

Streten, N. A.

doi:10.1175/1520-0493(1977)105<0195:aotyty>2.0.co;2

Cited by 28 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite lacking a statistically significant correlation, it should be noted that the trend of eastern Australian dust activity flips in the middle 1970s and from that point onwards both it and the NAMI proxy exhibit a positive trend. This is consistent with the observed increasing pressure anomaly associated with increased blocking high activity over the Tasman Sea and New Zealand region during spring (Streten, 1977). This is a major anomaly in the first empirical orthogonal function (EOF) of the SH pressure field over the past few decades, described by the SAM (Hall and Visbeck, 2002) and has also been identified in GCMs as a signature of anthropogenic climate change (Cai et al, 2003).…”

supporting

confidence: 86%

An ice‐core proxy for northerly air mass incursions into West Antarctica

Dixon

Mayewski

Goodwin

et al. 2011

Intl Journal of Climatology

View full text Add to dashboard Cite

ABSTRACT:A 200-year proxy for northerly air mass incursions (NAMI) into central and western West Antarctica is developed from the examination of 19 shallow (21-150 m deep) Antarctic ice-core non-sea-salt (nss) Ca 2+ concentration records. The NAMI proxy reveals a significant rise in recent decades. This rise is unprecedented for at least the past 200 years and is coincident with anthropogenically driven changes in other large-scale Southern Hemisphere (SH) environmental phenomena such as greenhouse gas (GHG) induced warming, ozone depletion, and the associated intensification of the SH westerlies. The Hysplit trajectory model is used to examine air mass transport pathways into West Antarctica. Empirical orthogonal function analysis, in combination with trajectory results, suggests that atmospheric circulation is the dominant factor affecting nssCa 2+ concentrations throughout central and western West Antarctica. Ozone recovery will likely weaken the spring-summer SH westerlies in the future. Consequently, Antarctica could lose one of its best defences against SH GHG warming.

show abstract

supporting

confidence: 86%

An ice‐core proxy for northerly air mass incursions into West Antarctica

Dixon

Mayewski

Goodwin

et al. 2011

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…Prior to 1972 the troughs may have been positioned during winter such that Argentine Island and Orcadas had generally similar mean temperature anomalies. Streten (1980) shows that for 1972-77 there was a higher frequency of low pressure centers in the Weddell Sea, contrary to what is shown on long-term mean pressure charts (Carleton 1981). From 1976 to 1979 the reverse was true, with Orcadas in the warmer air flow.…”

Section: Winter Circulation Near the Antarctic Peninsulamentioning

confidence: 69%

“…The station pairs across which westerly flow strength was measured are shown i n Figure 1. Station-pair pressure or height differences are used frequently to measure the westerlies in Southern Hemisphere climate studies (van Loon 1965;Trenberth 1976;Streten 1977Streten , 1980Rogers and van Loon 1982). I ) , and it also indicates years when the flow was above or below normal strength simultaneously at all six pairs.…”

Section: Methodsmentioning

confidence: 99%

Spatial Variability of Antarctic Temperature Anomalies and Their Association With the Southern Hemisphere Atmospheric Circulation

Rogers

1983

Annals of the Association of American Geographers

View full text Add to dashboard Cite

The spatial variability of seasonal mean temperature departures at 26 stations around Antarctica, southern South America, and nearby islands is shown using factor analysis. An opposition in temperature anomalies between mainland stations and those on or near the Antarctic Peninsula is a recurring pattern of spatial variability in all seasons but spring. Other factors indicate that temperature anomalies alternate in sign around the continent and especially near the peninsula. The association between the spatial patterns of temperature variability and features of the atmospheric circulation at middle and higher latitudes of the Southern Hemisphere is also examined. In each season the time series of one factor is significantly associated with temporal variations in the strength of the 500 mb westerlies, measured using height differences across six pairs of middle-latitude and Antarctic stations. In winter and summer the westerlies are linked to the mainlandiPeninsula temperature opposition pattern such that when zonal flow is anomalously strong, mainland stations are anomalously cold. In autumn and spring, temperature variability is highly related to meridional flow strength over New Zealand and in the lee of the Andes, and is associated with interannual longitudinal shifts in the positions of the climatological lows near the Antarctic coast. A deep Andes trough is associated with longerthan-usual ice duration at the South Orkneys. Historically, strong troughing and heavy sea-ice conditions in the South Atlantic occurred between 1920 and 1935.

show abstract

“…The recent development of high quality Southern Hemisphere meteorological data sets, especially those of the Australian Bureau of Meterology, have been particularly useful in various circulation studies (e.g. [8,35]) and temperature [28], with circulation changes occurring at higher southern latitudes. A heavy reliance on the interpretation of satellite imagery has been crucial in developing the daily hemispheric synoptic analy~es for the data-void Southern Oceans [ 18], particularly in locating accurately the centers of depression systems.…”

Section: Introductionmentioning

confidence: 99%

Variations in Antarctic sea ice conditions and relationships with Southern Hemisphere cyclonic activity, winters 1973–77

Carleton

1983

Arch. Met. Geoph. Biocl., Ser. B

View full text Add to dashboard Cite

Aspects of the Year-to-Year Variation of Seasonal and Monthly Mean Station Temperature over the Southern Hemisphere

Cited by 28 publications

References 0 publications

An ice‐core proxy for northerly air mass incursions into West Antarctica

An ice‐core proxy for northerly air mass incursions into West Antarctica

Spatial Variability of Antarctic Temperature Anomalies and Their Association With the Southern Hemisphere Atmospheric Circulation

Variations in Antarctic sea ice conditions and relationships with Southern Hemisphere cyclonic activity, winters 1973–77

Contact Info

Product

Resources

About