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Climatic significance of d^(18)O records from an 80.36 m ice core in the East rongbuk Glacier,Mount Qomolangma(Everest)

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Science China Earth Sciences 2005年第2期48卷 266-272页

作者： Paul A. Mayewski Climate Change Institute University of Maine OronoME 04469USA

The δ18O variations in an 80.36 m ice core retrieved in the accumulation zone of the East rongbuk Glacier, Mount Qomolangma (Everest), is not consistent with changes of air temperature from both southern and northern slopes of Himalayas, as well as these of the temperature anomalies over the Northern Hemisphere. The negative relationship between the δ18O and the net accumulation records of the ice core suggests the "amount effect" of summer precipitation on the δ18O values in the region. Therefore, the δ18O records of the East rongbuk ice core should be a proxy of Indian Summer Monsoon intensity, which shows lower δ18O values during strong monsoon phases and higher values during weak phases.

关键词： East rongbuk ice core, δ18O values, air temperature, Indian Summer Monsoon.

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CHEMICAL CHARACTERISTICS OF FOUR KINDS OF WATER IN THE rongbuk GLACIER BASIN, MOUNT QOMOLANGMA

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Chinese Geographical Science 1999年第3期9卷 82-86页

作者：秦翔秦大河

The chemistry of water samples collected in May of 1997 from snow, lakes, rivers, and spring on the north side of Mt. Qomolangma is reported. The pH value is between 7.35-8.52, the order of which is: lake water>river water>snow. All the samples are alkalinity. The pH values of the surface snow samples are relatively higher than the other China’s glacial regions. The conductivity of the samples is low, varying between 34.8-194?μs/cm. The conductivity values and total concentrations of the samples on the same glacier usually increase with decreasing altitude, but ones of the surface snow samples are converse for topographical causes. The anions are determined, the SO 2- 4 concentration is the highest in river and lake samples; in the surface snow samples, the Cl - concentration is the highest. Among the cations of all the samples, the Ca 2+ concentration is the highest. The relationships between SO 2- 4, Mg 2+ , F -, Ca 2+ , conductivity and the total concentrations show the increasing trend. On the other side, the conductivity, F -, Ca 2+ , the total concentration, SO 2- 4 and Mg 2+ of the river water samples all increase with decreasing altitude.

关键词： chemical characteristics rongbuk Glacier Mt. Qomolangma

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