Hail detection methods using radar data

ثبت نشده
چکیده

Different methods for hail detection are presented in the seminar. The presented methods use radar reflectivity measurements to determine the occurrence of hail. We compared observations made on meteorological stations, radar derived product developed by Faculty of mathematics and physics (FMF) and radar derived product VIL (Vertically integrated liquid). Comparison is performed for the period from 2006 to 2009 for ten selected days with observed hail. The biggest advantage of radar measurements of hail is that it gives a good estimate of the occurrence of hail in areas where there are no direct observations.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

8.07 Verification of Radar-based Hail Detection Product

Large hail is regularly observed in Belgium and The Netherlands and is sometimes the cause of severe damage on e.g. crops, greenhouses, roofs and cars. Most severe hail events occur in summer and are associated with intense thunderstorms producing large hail stones. Hail is a very local phenomenon, in time and space, which can not be easily detected with ground observational networks. Due to it...

متن کامل

Observations of oblate hail using dual polarization radar and implications for hail-detection schemes

Coincidental radar measurements and in situ ground-truth observations of large, oblate hail has allowed new insights into the fall mode of oblate hailstones. The effect of the fall mode upon hail-detection algorithms using multi-parameter radar is investigated and discussed, as is the vexed problem of extracting realistic rainfall rates in regions where hail and rain coexist. Observations prese...

متن کامل

An Analysis of Severe Hail Swaths in the Southern Plains of the United States

Severe hail is a common event in the Southern Plains of the United States. However, few studies have been conducted to quantitatively answer the question: how much hail occurs at any given location? Given the coverage of WSR-88D radars over the Southern Plains and recent technological advancements including hail detection algorithms, a compilation of severe hail swaths was completed for the per...

متن کامل

Hail Detection with Polarimetric Radar

Dual-polarization radars typically transmit horizontally and vertically polarized waves and receive polarized backscattered signals. Because illuminated hydrometeors are not spherical, their radar backscatter cross sections are not the same for the two polarizations. Hydrometeor size, shape, orientation, and thermodynamic phase can be inferred from returned signals. Polarimetric hail algorithms...

متن کامل

Assimilation of Simulated Polarimetric Radar Data for a Convective Storm Using Ensemble Kalman Filter. Part I: Observation Operators for Reflectivity and Polarimetric Variables

i Abstract A radar simulator for polarimetric radar variables including reflectivities at horizontal and vertical polarizations, the differential reflectivity and the specific differential phase, has been developed. This simulator serves as a testbed for developing and testing forward observation operators of polarimetric radar variables that are needed when directly assimilating these variable...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2013