Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction
The Tianshan Mountain is the largest mountain range in Central Asia, and the source area of many river systems. Changes in precipitation result in significant alterations to regional hydrological processes. Lake sediment from the Tian Shan representative of the last 90 years was chosen as the object...
Published in: | Applied Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2020
|
Subjects: | |
Online Access: | https://doi.org/10.3390/app10196793 https://doaj.org/article/d3093f3c5c074f3990d4db54d6eddc01 |
id |
ftdoajarticles:oai:doaj.org/article:d3093f3c5c074f3990d4db54d6eddc01 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:d3093f3c5c074f3990d4db54d6eddc01 2023-05-15T17:35:07+02:00 Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction Long Ma Jilili Abuduwaili Wen Liu Zhenjie He 2020-09-01T00:00:00Z https://doi.org/10.3390/app10196793 https://doaj.org/article/d3093f3c5c074f3990d4db54d6eddc01 EN eng MDPI AG https://www.mdpi.com/2076-3417/10/19/6793 https://doaj.org/toc/2076-3417 doi:10.3390/app10196793 2076-3417 https://doaj.org/article/d3093f3c5c074f3990d4db54d6eddc01 Applied Sciences, Vol 10, Iss 6793, p 6793 (2020) lake sediment grain size paleoprecipitation reconstruction Tianshan Mountain Central Asia Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 article 2020 ftdoajarticles https://doi.org/10.3390/app10196793 2022-12-31T05:37:17Z The Tianshan Mountain is the largest mountain range in Central Asia, and the source area of many river systems. Changes in precipitation result in significant alterations to regional hydrological processes. Lake sediment from the Tian Shan representative of the last 90 years was chosen as the object of this research study. The grain-size data were used in conjunction with instrumental data to provide a method for determining changes in paleoprecipitation. The results showed the three-point moving average curve of the silty fraction content with a size of 16 to 32 μm to be significantly consistent with the curve of total precipitation from April to September since 1950. The total content of clay and fine-silty fraction (0–16 μm) was clearly consistent with the monthly precipitation in July. The total precipitation from April to September showed a significant downward trend from 1930 to 1975, and then an overall increasing trend beginning in 1975, which may have been influenced by the North Atlantic Oscillation. The change in precipitation reconstructed by the grain size of lake sediments was significantly different from the high-resolution gridded datasets (Climatic Research Unit Time-Series version 4.04) because of the lack of data from meteorological stations in China before 1950. The conclusions of this study are significant for evaluating the validity of climatic research unit (CRU) data in arid areas of Western China. In addition, the results of this study serve as a bridge between modern instrumental records and long time-scale paleoclimate research and provide important reference values for future reconstructions of long time-scale paleoclimate. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Applied Sciences 10 19 6793 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
lake sediment grain size paleoprecipitation reconstruction Tianshan Mountain Central Asia Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
lake sediment grain size paleoprecipitation reconstruction Tianshan Mountain Central Asia Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Long Ma Jilili Abuduwaili Wen Liu Zhenjie He Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
topic_facet |
lake sediment grain size paleoprecipitation reconstruction Tianshan Mountain Central Asia Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
description |
The Tianshan Mountain is the largest mountain range in Central Asia, and the source area of many river systems. Changes in precipitation result in significant alterations to regional hydrological processes. Lake sediment from the Tian Shan representative of the last 90 years was chosen as the object of this research study. The grain-size data were used in conjunction with instrumental data to provide a method for determining changes in paleoprecipitation. The results showed the three-point moving average curve of the silty fraction content with a size of 16 to 32 μm to be significantly consistent with the curve of total precipitation from April to September since 1950. The total content of clay and fine-silty fraction (0–16 μm) was clearly consistent with the monthly precipitation in July. The total precipitation from April to September showed a significant downward trend from 1930 to 1975, and then an overall increasing trend beginning in 1975, which may have been influenced by the North Atlantic Oscillation. The change in precipitation reconstructed by the grain size of lake sediments was significantly different from the high-resolution gridded datasets (Climatic Research Unit Time-Series version 4.04) because of the lack of data from meteorological stations in China before 1950. The conclusions of this study are significant for evaluating the validity of climatic research unit (CRU) data in arid areas of Western China. In addition, the results of this study serve as a bridge between modern instrumental records and long time-scale paleoclimate research and provide important reference values for future reconstructions of long time-scale paleoclimate. |
format |
Article in Journal/Newspaper |
author |
Long Ma Jilili Abuduwaili Wen Liu Zhenjie He |
author_facet |
Long Ma Jilili Abuduwaili Wen Liu Zhenjie He |
author_sort |
Long Ma |
title |
Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
title_short |
Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
title_full |
Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
title_fullStr |
Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
title_full_unstemmed |
Variations in Sediment Grain Size from a Lake in the Tianshan Mountain of Central Asia: Implications for Paleoprecipitation Reconstruction |
title_sort |
variations in sediment grain size from a lake in the tianshan mountain of central asia: implications for paleoprecipitation reconstruction |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/app10196793 https://doaj.org/article/d3093f3c5c074f3990d4db54d6eddc01 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Applied Sciences, Vol 10, Iss 6793, p 6793 (2020) |
op_relation |
https://www.mdpi.com/2076-3417/10/19/6793 https://doaj.org/toc/2076-3417 doi:10.3390/app10196793 2076-3417 https://doaj.org/article/d3093f3c5c074f3990d4db54d6eddc01 |
op_doi |
https://doi.org/10.3390/app10196793 |
container_title |
Applied Sciences |
container_volume |
10 |
container_issue |
19 |
container_start_page |
6793 |
_version_ |
1766134175666012160 |