globalchange  > 过去全球变化的重建
DOI: 10.1029/2018JG004627
WOS记录号: WOS:000477719600010
论文题名:
Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use
作者: Brahney, Janice1,2; Ballantyne, Ashley P.3; Vandergoes, Marcus4; Baisden, Troy4,5; Neff, Jason C.1
通讯作者: Brahney, Janice
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN: 2169-8953
EISSN: 2169-8961
出版年: 2019
卷: 124, 期:5, 页码:1181-1193
语种: 英语
英文关键词: dust ; geochemistry ; land use ; Alpine lakes
WOS关键词: WIND EROSION ; EASTERN AUSTRALIA ; TRANSPORT PATHWAYS ; TRACE-ELEMENTS ; CLIMATE-CHANGE ; LAKE EYRE ; PHOSPHORUS ; IMPACT ; STORM ; POLLUTION
WOS学科分类: Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向: Environmental Sciences & Ecology ; Geology
英文摘要:

Mineral aerosols (dust) generated in the dryland regions of Australia have the potential to reach New Zealand through atmospheric transport. Although a large portion of dust in New Zealand originates in Australia, little is known about how dust deposition has varied over time in New Zealand or what may have caused this variation. We used geochemical dust proxies to examine the recent history of dust deposition to two alpine lakes in Kahurangi National Park, South Island, New Zealand. Geochemical indicators suggest that dust deposition began to increase around 1900, with the greatest deposition rates occurring from similar to 1920 to similar to 1990. In subsequent decades, dust deposition rates to New Zealand lakes appear to have declined. This rise and fall of dust deposition recorded in New Zealand lakes is consistent with dust records from the Antarctic Ice Sheet, Eastern Australia, and incidents of low visibility due to dust events recorded at Australian climate stations. The dust deposition rate over time also follows the temporal pattern of land use in south and central Australia over the time scale of the twentieth century suggesting a causal linkage. It is possible, and perhaps likely, that drought cycles also affected both emissions and transport pathways but over shorter time periods this was difficult to discern at the temporal resolution of these lake sediment cores. The increase in dust deposition to the high-elevation regions of New Zealand likely has implications for the biogeochemistry of alpine lakes in the Tasman Mountains.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/137295
Appears in Collections:过去全球变化的重建

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作者单位: 1.Univ Colorado Boulder, Dept Geol Sci, Boulder, CO 80309 USA
2.Utah State Univ, Dept Watershed Sci, Logan, UT 84322 USA
3.Univ Montana, Dept Ecosyst & Conservat Sci, Missoula, MT 59812 USA
4.Inst Geol & Nucl Sci GNS New Zealand, Lower Hutt, New Zealand
5.Univ Waikato, Environm Res Inst, Hamilton, New Zealand

Recommended Citation:
Brahney, Janice,Ballantyne, Ashley P.,Vandergoes, Marcus,et al. Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019-01-01,124(5):1181-1193
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