scholarly journals Asian inland wildfires driven by glacial–interglacial climate change

2020 ◽  
Vol 117 (10) ◽  
pp. 5184-5189 ◽  
Author(s):  
Yongming Han ◽  
Zhisheng An ◽  
Jennifer R. Marlon ◽  
Raymond S. Bradley ◽  
Changlin Zhan ◽  
...  
Keyword(s):  
High Intensity ◽  
Large Scale ◽  
Global Climate ◽  
Chinese Loess Plateau ◽  
Potential Importance ◽  
Quaternary Period ◽  
Chinese Loess ◽  
Ice Volume ◽  
The Past ◽  
The Chinese Loess Plateau

Wildfire can influence climate directly and indirectly, but little is known about the relationships between wildfire and climate during the Quaternary, especially how wildfire patterns varied over glacial–interglacial cycles. Here, we present a high-resolution soot record from the Chinese Loess Plateau; this is a record of large-scale, high-intensity fires over the past 2.6 My. We observed a unique and distinct glacial–interglacial cyclicity of soot over the entire Quaternary Period synchronous with marine δ18O and dust records, which suggests that ice-volume-modulated aridity controlled wildfire occurrences, soot production, and dust fluxes in central Asia. The high-intensity fires were also found to be anticorrelated with global atmospheric CO2 records over the past eight glacial–interglacial cycles, implying a possible connection between the fires, dust, and climate mediated through the iron cycle. The significance of this hypothetical connection remains to be determined, but the relationships revealed in this study hint at the potential importance of wildfire for the global climate system.

Drought variation trends in different subregions of the Chinese Loess Plateau over the past four decades

2012 ◽  
Vol 115 ◽  
pp. 167-177 ◽  
Author(s):  
Baoqing Zhang ◽  
Pute Wu ◽  
Xining Zhao ◽  
Yubao Wang ◽  
Jiawen Wang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
Variation Trends ◽  
The Chinese Loess Plateau

scholarly journals Characterizing the Topographic Changes and Land Subsidence Associated with the Mountain Excavation and City Construction on the Chinese Loess Plateau

2021 ◽  
Vol 13 (8) ◽  
pp. 1556
Author(s):  
Chuanhao Pu ◽  
Qiang Xu ◽  
Kuanyao Zhao ◽  
Yanan Jiang ◽  
Lina Hao ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Large Scale ◽  
Ground Deformation ◽  
Urban Expansion ◽  
Chinese Loess Plateau ◽  
Rapid Urbanization ◽  
Chinese Loess ◽  
City Construction ◽  
Large Scale Land ◽  
The Chinese Loess Plateau

A mega project, Mountain Excavation and City Construction (MECC), was launched in the hilly and gully region of the Chinese Loess Plateau in 2012, in order to address the shortage of available land and create new flat land for urban construction. However, large-scale land creation and urban expansion significantly alters the local geological environment, leading to severe ground deformation. This study investigated the topographic changes, ground deformation, and their interactions due to the MECC project in the Yan’an New District (YND). First, new surface elevations were generated using ZiYuan-3 (ZY-3) stereo images acquired after the construction in order to map the local topographic changes and the fill thickness associated with the MECC project. Then, the interferometric synthetic aperture radar (InSAR) time series and 32 Sentinel-1A images were used to assess the spatial patterns of the ground deformation in the YND during the postconstruction period (2017–2018). By combining the InSAR-derived results and topographic change features, the relationship between the ground deformation and large-scale land creation was further analyzed. The results indicated that the MECC project in the YND has created over 22 km2 of flat land, including 10.8 km2 of filled area, with a maximum fill thickness of ~110 m. Significant uneven ground deformation was detected in the land-creation area, with a maximum subsidence rate of approximately 121 mm/year, which was consistent with the field survey. The strong correlation between the observed subsidence patterns and the land creation project suggested that this recorded uneven subsidence was primarily related to the spatial distribution of the filling works, along with the changes in the thickness and geotechnical properties of the filled loess; moreover, rapid urbanization, such as road construction, can accelerate the subsidence process. These findings can guide improvements in urban planning and the mitigation of geohazards in regions experiencing large-scale land construction.

scholarly journals Strontium isotopic and elemental characteristics of calcites in the eolian dust profile of the Chinese Loess Plateau during the past 7 Ma

2008 ◽  
Vol 42 (6) ◽  
pp. 493-506 ◽  
Author(s):  
WENBO RAO ◽  
JUN CHEN ◽  
JIEDONG YANG ◽  
JUNFENG JI ◽  
GENGXIN ZHANG ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
Eolian Dust ◽  
The Chinese Loess Plateau

Population history and its relationship with climate change on the Chinese Loess Plateau during the past 10,000 years

The Holocene ◽  
2015 ◽  
Vol 25 (7) ◽  
pp. 1144-1152 ◽  
Author(s):  
Hu Li ◽  
Chengbang An ◽  
Wenjie Fan ◽  
Weimiao Dong ◽  
Yongtao Zhao ◽  
...  
Keyword(s):  
Climate Change ◽  
Loess Plateau ◽  
Population History ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
The Chinese Loess Plateau

Variations of 143Nd/144Nd and 87Sr/86Sr ratios of the Lingtai profile in the Chinese Loess Plateau during the past 7Ma

2006 ◽  
Vol 70 (18) ◽  
pp. A689
Author(s):  
Yin-Xi Wang ◽  
Jie-Dong Yang ◽  
Jun Chen ◽  
Kai-Jun Zhang ◽  
Wen-Bo Rao
Keyword(s):  
Loess Plateau ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
The Past ◽  
The Chinese Loess Plateau

Using ecosystem service bundles to evaluate spatial and temporal impacts of large-scale landscape restoration on ecosystem services on the Chinese Loess Plateau

2021 ◽  
Author(s):  
Hao Chen ◽  
Luuk Fleskens ◽  
Johanna Schild ◽  
Simon Moolenaar ◽  
Fei Wang ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Loess Plateau ◽  
Large Scale ◽  
Chinese Loess Plateau ◽  
Water Yield ◽  
Timber Production ◽  
Sediment Retention ◽  
Chinese Loess ◽  
Trade Offs ◽  
The Chinese Loess Plateau

<p>From 1999 onwards, China has initiated a large-scale landscape restoration project on the Chinese Loess Plateau, which has had profound but variable impacts on the local ecosystem services supply. In this study, we evaluate the spatial and temporal dynamics in 11 ecosystem services in the Yan’an area on the Chinese Loess Plateau from 1990 to 2018 based on the InVEST model and statistical yearbook data. To consider trade-offs and synergies between ecosystem services, the concept of ecosystem service bundles was used to understand the dynamics of ecosystem services. A significant increase of fruit production, sediment retention, habitat quality, aesthetic landscape value as well as learning and inspiration value was found over time in Yan’an area, while a decrease of timber production and water yield was also observed. Synergistic relations were found between sediment retention, carbon sequestration, habitat quality and outdoor recreation, while trade-offs were observed between timber production and water yield. The majority of ecosystem services bundles of Yan’an area were transformed from having a focus on timber production to aesthetic landscape value. The dynamics of ecosystem services change by land restoration was discovered, to start with increasing regulating services at expense of provisioning services, cultural services exceeding regulating services and occupied the main proportion subsequently. The most obvious change was observed in 2000, coinciding with the start of large-scale restoration activities. The implementation of the large-scale restoration project is recognized as a key driving force inducing these changes. Based on the results, it is recommended that the Yan’an government pays attention to local water resource management and timber supply.</p>

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