Recent 50-Year Glacier Mass Balance Changes over the Yellow River Source Region, Determined by Remote Sensing

Zhou, Min; Xu, Song; Wang, Yetang; Wang, Yuzhe; Hou, Shugui

doi:10.3390/rs14246286

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…It has four working modes, SM, IW, EW, and WV [48]. The spatial resolution of the satellite data is 5 m × 20 m [49], the temporal resolution is 12 days, and the period can be shortened to 6 days with the co-operation of the double star. It provides a rich and effective data source for monitoring glacier elevation [50].…”

Section: Datasetsmentioning

confidence: 99%

The Influence of Glacier Mass Balance on River Runoff in the Typical Alpine Basin

Yang,

Du,

et al. 2023

Water

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Quantifying the effects of alpine GMB (Glacier Mass Balance) on river runoff is an important content of climate change. Uncertainty exists in GMB monitoring when applying remote-sensing technology. There are several reasons for these uncertainties, such as terrain deviation co-registration among different topographic data, the mismatch between GSE (Glacier Surface Elevation) from satellite monitoring and the GMB that comprises the physical glacier properties, the driving factors of GMB, and the response patterns of the runoff within the basin. This paper proposed a method based on the ridge line co-registration of DEMs (Digital Elevation Models), and the Tailan River basin, which is a typical glacier melt runoff recharge basin located in the southern Tianshan Mountains, was selected. Abnormal values in GSE changes were removed using ice thickness data, and the GSE results were optimized based on the regularity of the GSE change with altitude to estimate the GMB. The driving factors of the GMB and the response characteristics of the runoff in the basin were also explored. The results showed that the accuracy of the optimized GSE results across different periods has improved by more than 25%. The mean annual thinning value of GSE in the basin from 2000 to 2022 was −0.25 ± 0.02 m·a−1, corresponding to a GMB value of −0.30 ± 0.02 m w.e.a−1, indicating a consistent GMB loss state. Combined with climate data, the glaciers in the basin were impacted by rising temperatures, and the smallest increase in annual precipitation in the basin was insufficient to compensate for the GMB loss. Moreover, in the past 22 years, glacier meltwater accounts for 46.15% of the total runoff in the Tailan River basin.

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Section: Datasetsmentioning

confidence: 99%

The Influence of Glacier Mass Balance on River Runoff in the Typical Alpine Basin

Yang,

Du,

et al. 2023

Water

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Elevation Changes of A’nyemaqen Snow Mountain Revealed with Satellite Remote Sensing

Lin,

Yang,

et al. 2024

Remote Sensing

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A’nyemaqen Snow Mountain (ASM) is the largest glacier area in the Yellow River source area and has been experiencing significant ablation in recent years. To investigate spatial–temporal elevation changes in ASM, a 21–year Digital Elevation Model (DEM) time series was obtained using the MicMac ASTER (MMASTER) algorithm and ASTER L1A V003 data. It covers the period from January 2002 to January 2023. The mean elevation of ASM decreased by −7.88 ± 3.37 m during this period, with highly spatial variation. The elevation decrease occurred mainly in the lower elevations and opposite in the higher elevations. The corresponding elevation decrease was −12.99 ± 11.29 and −4.45 ± 11.36 m at the southern Yehelong Glacier and the northern Weigeledangxiong Glacier, respectively. Moreover, there exists a temporal variation in ASM. The maximum elevation was observed in February for both ASM and the southern Yehelong Glacier but March for Weigeledangxiong Glacier, with about 1 month lagged. With the elevation time series and climate data from ERA5 datasets, we applied the random forest technique and found that the temperature is the main factor to elevation change in ASM. Furthermore, the response of elevation changes to temperature appeared with a lag and varied with the location. Based on the elevation time series, the ARIMA model was further used to forecast the elevation changes in the next 5 years. All regions will experience the elevation decrease, with a mean decline −1.74 ± 0.39 m and a corresponding rate −0.35 ± 0.08 m/a in ASM. This is similar to that of −0.38 ± 0.16 m/a between 2002 and 2003, showing its stability in the near future.

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Recent 50-Year Glacier Mass Balance Changes over the Yellow River Source Region, Determined by Remote Sensing

Cited by 2 publications

References 35 publications

The Influence of Glacier Mass Balance on River Runoff in the Typical Alpine Basin

The Influence of Glacier Mass Balance on River Runoff in the Typical Alpine Basin

Elevation Changes of A’nyemaqen Snow Mountain Revealed with Satellite Remote Sensing

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