Identification

Title

Specific attenuation-based rain-rate applicability to varying rainfall intensity in complex terrain

Abstract

Dual-polarization radar is a valuable tool for quantifying rainfall, including in remote and mountainous regions, but subject to partial beam blockage and ground clutter. Recent studies have shown that the utilization of specific attenuation by a radar for rain-rate estimations R ( A ) can overcome partial beam blockage impacts by relying on radial profiles of differential phase shifts. This study applies this R ( A ) algorithm to the National Science Foundation (NSF) National Center for Atmospheric Research (NCAR) dual-polarization S-band (S-Pol) radar deployment in northwest Taiwan for the NSF-funded 2022 Prediction of Rainfall Extremes Campaign in the Pacific (PRECIP) dataset to provide reliable rain estimates, including over the mountains. While operating for nearly 3 months, S-Pol measured multiple heavy rainfall events including isolated convective cells and widespread stratiform precipitation, thus providing an ideal dataset for evaluating R ( A ) performance sensitivities to local terrain, clutter, ray segmentation, and rain type. The R ( A ) performance improved over the more commonly used NSF NCAR hybrid rain algorithm when applying to an extreme PRECIP event after several modifications to the R ( A ) algorithm. Over the entire campaign, R ( A ) overestimated low-intensity rainfall and was challenged in overall performance owing to remaining clutter. A new algorithm R (Synth), developed to merge R ( A ) into the hybrid algorithm when it was most optimal, led to improved performance in lower intensity rainfall when compared to R ( A ) alone.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.net/ark:/85065/d75q51hz

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2025-08-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact