气候变化领域集成服务门户(CCPortal): Rain erosivity map for Germany derived from contiguous radar rain data

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DOI	10.5194/hess-23-1819-2019
	Rain erosivity map for Germany derived from contiguous radar rain data
	Auerswald K.; Fischer F.K.; Winterrath T.; Brandhuber R.
发表日期	2019
ISSN	1027-5606
起始页码	1819
结束页码	1832
卷号	23 期号:4
英文摘要	Erosive rainfall varies pronouncedly in time and space. Severe events are often restricted to a few square kilometers. Radar rain data with high spatiotemporal resolution enable this pattern of erosivity to be portrayed with high detail. We used radar data with a spatial resolution of 1 km2 over 452 503 km2 to derive a new erosivity map for Germany and to analyze the seasonal distribution of erosivity. The expected long-term regional pattern was extracted from the scattered pattern of events by several steps of smoothing. This included averaging erosivity from 2001 to 2017 and smoothing in time and space. The pattern of the resulting map was predominantly shaped by orography. It generally agrees well with the erosivity map currently used in Germany (Sauerborn map), which is based on regressions using rain gauge data (mainly from the 1960s to 1980s). In some regions the patterns of both maps deviate because the regressions of the Sauerborn map were weak. Most importantly, the new map shows that erosivity is about 66% larger than in the Sauerborn map. This increase in erosivity was confirmed by long-term data from rain gauge stations that were used for the Sauerborn map and which are still in operation. The change was thus not caused by using a different methodology but by climate change since the 1970s. Furthermore, the seasonal distribution of erosivity shows a slight shift towards the winter period when soil cover by plants is usually poor. This shift in addition to the increase in erosivity may have caused an increase in erosion for many crops. For example, predicted soil erosion for winter wheat is now about 4 times larger than in the 1970s. These highly resolved topical erosivity data will thus have definite consequences for agricultural advisory services, landscape planning and even political decisions. © 2019 Author(s).
语种	英语
scopus关键词	Climate change; Crops; Erosion; Plants (botany); Rain gages; Soils; Space-based radar; Advisory services; Landscape planning; Political decision; Rain gauge data; Regional pattern; Seasonal distributions; Spatial resolution; Spatio-temporal resolution; Rain; erosivity; landscape planning; long-term change; orography; radar; rainfall; satellite data; smoothing; soil cover; soil erosion; spatiotemporal analysis; Germany; Triticum aestivum
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159707
作者单位	Auerswald, K., Technische Universität München, Lehrstuhl für Grünlandlehre, Freising, 85354, Germany; Fischer, F.K., Technische Universität München, Lehrstuhl für Grünlandlehre, Freising, 85354, Germany, Bayerische Landesanstalt für Landwirtschaft, Freising, 85354, Germany, Deutscher Wetterdienst, Außenstelle Weihenstephan, Freising, 85354, Germany; Winterrath, T., Deutscher Wetterdienst, Abteilung Hydrometeorologie, Offenbach am Main, 63067, Germany; Brandhuber, R., Bayerische Landesanstalt für Landwirtschaft, Freising, 85354, Germany
推荐引用方式 GB/T 7714	Auerswald K.,Fischer F.K.,Winterrath T.,et al. Rain erosivity map for Germany derived from contiguous radar rain data[J],2019,23(4).
APA	Auerswald K.,Fischer F.K.,Winterrath T.,&Brandhuber R..(2019).Rain erosivity map for Germany derived from contiguous radar rain data.Hydrology and Earth System Sciences,23(4).
MLA	Auerswald K.,et al."Rain erosivity map for Germany derived from contiguous radar rain data".Hydrology and Earth System Sciences 23.4(2019).