Accumulation in the Region of Wilkes, Wilkes Land, Antarctica

Abstract

ABSTRACT. Carryi n g on from the work ini tiated over th e l. G.Y. p eriod by th e United States g lacio logical parties at Wilkes (cf. H o llin and Came ro n, 196 1), membe rs of th e Australi an National Antarctic R esearc h Exped itions have continued accumulation stake measurem e nts to 80 km. in la nd o n th e p lateau (la t. 66 0 3 1' S. ) a nd extended th e m south 480 km. (to lat. 71 0 S.). Th ese stake m ea surements, supp lem ented by pit data and su r face observa tio ns, supply a compre h ensi ve acco unt of t he accumulation in this region ; how it builds up during the year, h ow it va ri es from ycar to yea r and how it is affec ted by topography. R EsuME.. Continuant le travail co mm e n ce au CO lll'S d e la p e r iodc de l'AG. I. pa r les equipcs g laciol ogiq ues d es E tats-Unis it Wilkes (cf. Z USAMM ENFASSUNG . Anknupfend an di e Untersuc hun ge n US-a merikan iseh e r G la ziologen wa hre nd d es I GJ in Wilkes L and (ve rg!. H olli n and Cameron, 196 1) h aben T eiln ehm er d el' Australian Nati onal Alllarcti c R esea rch Exped it ions M css ungc n an Akkumu lationspege ln bis 80 km la nd einwa rts a uf d em P o lp la teau (Br. 66° 3 1' S) fortge fuhrt und 480 km nach Sliden (bis B r . 7 t 0 S ) a usgede hnt. Diese Messun gen , e rga nzt du rch Beobachtungcn in Schac hten und a uf d el' OberAach e, vermittcln e in umfassend es 13i ld vom Schn eeauftrag d es G e bi e tcs : sein Anwac hsen im J ah rcsab lauf, se in e Schwankungen von Jahr z u Jahr und se ine Abh a ngigk eit vo n d e l' Gestalt d es G e la ndes . P LATEAU T OPOGRAP HYW ilkes is situated o n a rock p en in sul a, 10 m. elevation, at la t. 66° 15'5' S. , lo ng . II O c 31' 5' E . (Fig. I) . From here the ice platea u rises steeply at first then more gradua lly farther in la nd (Fig . 5) ' A satel li te station , S2, is situa ted 80 km . east-so u t h-east of Wi lkes at an elevatio n of 1, 166 m . in lat. 66° 3 1' S., long. 11 2° 12' E.South of station S2 the ice cap continu es to rise to about 1,230 m. at 29 km. so uth , then fa ll s to 880 m. at go km . south. From there the platea u rises gradua ll y but less steep ly to 2,990 m. at 480 km. south of station S2 in lat. 71 ° 00' S. P la teau slopes measured in Igb l and further elevations obtained in Marc h 1962 indi cate that the Budd Coast has a hig h region with a centra l dom e over 1,500 m. in elevation a t abo ut lat. 66° 33' S. , long. 11 3° 00' E.To the south of th is high region th ere is a low region less than 900 m. in eleva tion ex tending from the Totten G lacier to the V a nderJorcl a nd Jo hn Quincy Adams G laciers. Seismic soun dings indicate that the bedrock surface reaches 3, 200 m . below sea-l evel in this region (Jewel l, un pub lish ed ) .I t wi ll be seen that this topograph ical depression h as a marked inAuen ce on the acc umula tion in the region. STAKE SYSTEMS AND M EASUREMENTS W£lkes local areaIn November Ig57 a set of more than 35 sta kes was placed from th e rock pen in ula coast, up over the steep ice ram p to about 13 km . inla nd on th e p late...

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Snow Accumulation Studies on the Thule Peninsula, Greenland

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Variations in snow and firn chemistry along US ITASE traverses and the effect of surface glazing

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