| 乌鲁木齐河源1号冰川气象要素与冰芯记录形成过程及其分辨率的关系研究 |
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| 引用本文： | 尤晓妮,李忠勤,王莉霞.乌鲁木齐河源1号冰川气象要素与冰芯记录形成过程及其分辨率的关系研究[J].冰川冻土,2019,41(2):259-267. |
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| 作者姓名： | 尤晓妮 李忠勤 王莉霞 |
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| 作者单位： | 天水师范学院 资源与环境工程学院,甘肃 天水,741000;中国科学院 西北生态环境资源研究院冰冻圈科学国家重点实验室/天山冰川观测试验站,甘肃 兰州,730000 |
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| 基金项目： | 国家自然科学基金项目（41261017;41761017）资助 |
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| 摘 要： | 基于乌鲁木齐河源1号冰川4 130 m处的雪冰化学资料,探究了气温和降水与冰芯记录形成过程及其分辨率的关系,并通过建立温度参数的淋溶模型,探讨了夏季消融期雪坑离子浓度与正积温的关系。结果表明：乌鲁木齐河源1号冰川Mg2+离子以1年为分辨率形成冰芯记录,其浓度仅保存了初始值的30%。春季,化学离子浓度峰值受到离子来源和降水的影响而增大,这种增大趋势随着深度的增加明显弱化。淋溶模式显示,雪坑离子浓度是关于消融量与离子损失率的指数函数,随正积温的增大表现出指数衰减的规律。该模式基本能反映不同离子的淋溶过程。
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| 关 键 词： | 冰芯记录 正积温 降水 淋溶模式 离子浓度 |
| 收稿时间： | 2017-09-29 |
| 修稿时间： | 2018-02-05 |
The relationship between meteorological elements and
ice core record forming process and its resolution on Glacier No.1 in headwater of Urumqi River,eastern Tianshan Mountains |
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| YOU Xiaoni,LI Zhongqin,WANG Lixia.The relationship between meteorological elements and
ice core record forming process and its resolution on Glacier No.1 in headwater of Urumqi River,eastern Tianshan Mountains[J].Journal of Glaciology and Geocryology,2019,41(2):259-267. |
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| Authors: | YOU Xiaoni LI Zhongqin WANG Lixia |
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| Institution: | 1.College of Resources and Environmental Engineering,
Tianshui Normal University, Tianshui 741000, Gansu, China;
2.State Key Laboratory of Cryospheric Science
/ Tianshan Glaciological Station, Northwest Institute of Eco-Environment and
Resources, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | To explore the effect of elution process on ion concentrations
in snow and then interpret the ice core records, it is necessary to figure out
the complete process of ice core record forming through tracking the Mg2+ concentration peaks in snow-firn packs. For the case of Glacier No.1 in
headwater of Urumqi River, it is concluded that in the ice core record formed
from Mg2+ ion with a resolution of one year, finally only 30% of the
initial value can be preserved. In April, ion concentration in whole snow-firn layer will increase because of frequent dust
events and precipitation. A temperature index elution model is constructed to describe
the relationship between positive cumulative air temperatures and ion
concentrations in ablation season. This conclusion shows that ion concentration
decays exponentially with positive air temperatures. This model could reflect
the elution process well. |
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| Keywords: | 5pt ice core record" target="_blank">font-family:"">ice core record positive cumulative air temperature precipitation elution model ion concentration |
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