The depth profiles of electrical conductance, δ 18 O, 210 Pb and cosmogenic radio isotopes 10 Be and 36 Cl have been measured in a 30 m ice core from east Antarctica near the Indian station, Dakshin Gangotri. Using 210 Pb and δ 18 O, the mean annual accumulation rates have been calculated to be 20 and 21 cm of ice equivalent per year during the past ∼ 150 years. Using these acumulation rates, the volcanic event that occurred in 1815 AD, has been identified based on electrical conductance measurements. Based on δ 18 O measurements, the mean annual surface air temperatures (MASAT) data observed during the last 150 years indicates that the beginning of the 19th century was cooler by about 2 • C than the recent past and the middle of 18th century. The fallout of cosmogenic radio isotope 10 Be compares reasonably well with those obtained on other stations (73 • S to 90 • S) from Antarctica and higher latitudes beyond 77 • N. The fallout of 36 Cl calculated based on the present work agrees well with the mean global production rate estimated earlier by Lal and Peters (1967). The bomb pulse of 36 Cl observed in Greenland is not observed in the present studies-a result which is puzzling and needs to be studied on neighbouring ice cores from the same region.

ABSTRACT. The Gara Glacier, a north-facing valley glacier situated in the wes tern Himalaya, was selected to be part of the study und ertaken by India in connection with the International Hydrological Decade. This paper deals with the procedure adopted and th e results obtained for mass-bala nce assessment over a period of one year between Se ptember [974 and September [975. The glacier has record ed a positive net ba lance of the order of 2.48 X [0 6 m 3 in terms of water equivalent.R EsuME.

ABSTRACT. The Gara Glacier, a north-facing valley glacier situated in the wes tern Himalaya, was selected to be part of the study und ertaken by India in connection with the International Hydrological Decade. This paper deals with the procedure adopted and th e results obtained for mass-bala nce assessment over a period of one year between Se ptember [974 and September [975. The glacier has record ed a positive net ba lance of the order of 2.48 X [0 6 m 3 in terms of water equivalent.R EsuME.

No abstract

The Gor Garung group of glaciers constitute an ice cover of over 4 km2 in a basin of 27 km2 area, lying in the Sutlej River catchment of the north–western Himalaya. This paper, the first record of these glaciers, their moraines and lakes observed in this area, is the result of mapping the glaciers and the pro–glacial field. An attempt has been made to utilize lichenometry for establishing relative antiquity of various terminal moraine ridges generated by these glaciers, and six groups have been determined.