Missing Rainfall Extremes in Commercial Microwave Link Data Due To Complete Loss of Signal

Author:

Polz Julius1ORCID,Graf Maximilian12ORCID,Chwala Christian12ORCID

Affiliation:

1. Institute of Meteorology and Climate Research Karlsruhe Institute of Technology, Campus Alpin Garmisch‐Partenkirchen Germany

2. Chair of Regional Climate and Hydrology Institute of Geography University of Augsburg Augsburg Germany

Abstract

AbstractAn important aspect of rainfall estimation is to accurately capture extreme events. Commercial microwave links (CMLs) can complement weather radar and rain gauge data by estimating path‐averaged rainfall intensities near ground. Our aim with this paper was to investigate attenuation induced complete loss of signal (blackout) in the CML data. This effect can occur during heavy rain events and leads to missing extreme values. We analyzed 3 years of attenuation data from 4,000 CMLs in Germany and compared it to a weather radar derived attenuation climatology covering 20 years. We observed that the average CML experiences 8.5 times more blackouts than we would have expected from the radar derived climatology. Blackouts did occur more often for longer CMLs (e.g., >10 km) despite their increased dynamic range. Therefore, both the hydrometeorological community and network providers can consider our analysis to develop mitigation measures.

Funder

Deutsche Forschungsgemeinschaft

Helmholtz Association

Bundesministerium für Bildung und Forschung

Karlsruhe Institute of Technology

Publisher

American Geophysical Union (AGU)

Subject

General Earth and Planetary Sciences,Environmental Science (miscellaneous)

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Transboundary Rainfall Estimation Using Commercial Microwave Links;Earth and Space Science;2023-08

2. Potential and Limitations of Filling Gaps in Commercial Microwave Link Data Stemming From Complete Loss of Signal During Heavy Rainfall;2023 IEEE International Conference on Acoustics, Speech, and Signal Processing Workshops (ICASSPW);2023-06-04

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