تقرير
Enhancing Consistency of Microphysical Properties of Precipitation Across the Melting Layer in the Dual-Frequency Precipitation Radar Data
| العنوان: | Enhancing Consistency of Microphysical Properties of Precipitation Across the Melting Layer in the Dual-Frequency Precipitation Radar Data |
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| المؤلفون: | Kamil Mroz, Alessandro Battaglia, Ann M. Fridlind |
| المصدر: | Atmospheric Measurement Techniques. 17(5) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2024. |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Meteorology and Climatology |
| الوصف: | Stratiform rain and the overlying ice play crucial roles in Earth's climate system. From a microphysics standpoint, water mass flux primarily depends on two variables: particles' concentration and their mass. The Dual-frequency Precipitation Radar (DPR) on the Global Precipitation Measurement mission core satellite is a spaceborne instrument capable of estimating these two quantities through dual-wavelength measurements. In this study, we evaluate bulk statistics on the ice particle properties derived from dual-wavelength radar data in relation to the properties of rain underneath. Specifically, we focus on DPR observations over stratiform precipitation, characterized by columns exhibiting a prominent bright band, where the melting layer can be easily detected. Our analysis reveals a large increase in the retrieved mass flux as we transition from the ice to the rain phase in the official DPR product. This observation is in disagreement with our expectation that mass flux should remain relatively stable across the bright band in cold-rain conditions. To address these discrepancies, we propose an alternative retrieval algorithm that ensures a gradual transition of Dm (mean mass-weighted particle melted-equivalent diameter) and the precipitation rate across the melting zone. This approach also helps in estimating bulk ice density above the melting level. These findings demonstrate that DPR observations can not only quantify ice particle content and their size above stratiform rain regions but also estimate bulk density, provided uniform conditions that minimize uncertainties related to partial beam filling. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1867-8548 1867-1381 |
| DOI: | 10.5194/amt-17-1577-2024 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20240003308 |
| ملاحظات: | 509496.02.80.01.15 RP18G0088 |
| رقم الأكسشن: | edsnas.20240003308 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 18678548 18671381 |
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| DOI: | 10.5194/amt-17-1577-2024 |