粉尘颗粒物对祁连山老虎沟冰川融水理化性质的影响

被引：3

作者：

董志文 ^{[1
,2
]}

秦大河 ^{[1
]}

陈记祖 ^{[1
]}

秦翔 ^{[1
]}

张瑞波 ^{[2
]}

任贾文 ^{[1
]}

机构：

[1] 中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/祁连山冰川站

[2] 中国气象局乌鲁木齐沙漠气象研究所

来源：

水科学进展 | 2014年 / 25卷 / 02期

关键词：

粉尘颗粒物; 冰川融水; 化学组分; 祁连山; 老虎沟冰川;

D O I：

10.14042/j.cnki.32.1309.2014.02.007

中图分类号：

P342 [水文化学]; P343.6 [冰川];

学科分类号：

081501 ; 070501 ;

摘要：

基于2012年消融期6～9月在祁连山老虎沟12号冰川采集冰川融水径流样品,分析探讨冰川融水中粉尘颗粒物对融水理化性质的影响。结果表明,粉尘特征在消融期的变化很好地反映了冰川消融过程,融水中粉尘浓度和粒径众数在冰川强烈消融期的7月份表现为最高。粉尘体积粒径分布主要包括大气气溶胶超细颗粒(0～3.0μm,主要为PM 2.5),大气粉尘颗粒(3.0～20μm),以及局地源的粗颗粒(20～100μm);对雪冰消融释放的粉尘部分(3.0～20μm)粒径分布正态拟合结果说明,融水中粉尘颗粒物有很大部分来源于积雪中的粉尘运移所致。同时,融水中化学离子相对组成及其浓度消融期变化都与粉尘有较好的一致性,意味着粉尘对融水化学要素有重要影响。此外,pH值和电导率(EC)消融期的变化也反映了粉尘对融水物理指标的影响。在粉尘浓度较高时,融水pH值和电导率也表现出高值;融水径流中的悬移质颗粒物(SPM)浓度和溶解质固体(TDS)浓度具有较为一致的变化过程,反映了粉尘对于融水中溶解质含量也有较大影响。

引用

页码：207 / 216

页数：10

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