气候变化领域集成服务门户(CCPortal): Long-term patterns and changes of unglaciated High Arctic stream thermal regime

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DOI	10.1016/j.scitotenv.2024.171298
	Long-term patterns and changes of unglaciated High Arctic stream thermal regime
	Majerska, Marta; Osuch, Marzena; Wawrzyniak, Tomasz
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	923
卷号	923
英文摘要	Although water temperature is one of the most important factors influencing hydrochemistry and river ecology, long-term monitoring and modelling of stream thermal temporal variability are uncommon. There is sparse research regarding the thermal regimes of Arctic rivers, especially in Svalbard, a geographical hotspot affected by extreme climate change and Arctic amplification. There is a need for improvement and better understanding of the factors influencing the stream water temperature regime. To address this research gap, we present a study of the non -glaciated arctic catchment, Fuglebekken (Spitsbergen, Svalbard). We propose methods for reconstructing the thermal regime of the Arctic stream based on available in -situ data. This study evaluates different sets of input variables with hourly time steps required to explain the variability in water temperature. The study comprises two modelling approaches, a stochastic transfer function Multiple Input Single Output and a supervised machine learning technique, Gaussian Process Regression, to simulate the water temperature in the years 2005 -2022. The ground temperature at a depth of 20 cm and total solar radiation were found to be the main forcings that explain most of the water temperature variability. The outputs of both models showed similar tendencies and patterns. A diurnal warming trend of 0.5 -3.5 degrees C per decade has been detected in stream water temperature throughout the summer season. The highest increase of 6.0 degrees C in the water temperature in 2005 -2022 was found to be present in the second part of June. The outcomes prove that the thermal regime of the Fuglebekken stream
英文关键词	Polar hydrology; Water temperature modelling; Arctic catchment; Svalbard
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001233121200001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300550
作者单位	Polish Academy of Sciences; Institute of Geophysics of the Polish Academy of Sciences
推荐引用方式 GB/T 7714	Majerska, Marta,Osuch, Marzena,Wawrzyniak, Tomasz. Long-term patterns and changes of unglaciated High Arctic stream thermal regime[J],2024,923.
APA	Majerska, Marta,Osuch, Marzena,&Wawrzyniak, Tomasz.(2024).Long-term patterns and changes of unglaciated High Arctic stream thermal regime.SCIENCE OF THE TOTAL ENVIRONMENT,923.
MLA	Majerska, Marta,et al."Long-term patterns and changes of unglaciated High Arctic stream thermal regime".SCIENCE OF THE TOTAL ENVIRONMENT 923(2024).