Academic Journal
Fragmentation in Collisions of Snow with Graupel/Hail: New Formulation from Field Observations
| Τίτλος: | Fragmentation in Collisions of Snow with Graupel/Hail: New Formulation from Field Observations |
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| Συγγραφείς: | Martanda Gautam, Deepak Waman, Sachin Patade, Akash Deshmukh, Freddy Paul, Paul Smith, Aaron Bansemer, Marcin Jackowicz-Korczynski, Vaughan Phillips |
| Πηγή: | Gautam, M, Waman, D, Patade, S, Deshmukh, A, Phillips, V, Jackowicz-Korczynski, M, Pazhambilly Paul, F, Smith, P & Bansemer, A 2024, 'Fragmentation in Collisions of Snow with Graupel/Hail : New Formulation from Field Observations', Journal of the Atmospheric Sciences, vol. 81, no. 12, pp. 2149-2164. https://doi.org/10.1175/JAS-D-23-0122.1 |
| Στοιχεία εκδότη: | American Meteorological Society, 2024. |
| Έτος έκδοσης: | 2024 |
| Θεματικοί όροι: | Optimization, ddc:000, Measurements, 0207 environmental engineering, information & general works, 02 engineering and technology, Computer science, 01 natural sciences, Cloud parameterizations, Secondary ice production, In situ atmospheric observations, Cloud microphysics, 0105 earth and related environmental sciences |
| Περιγραφή: | Secondary ice production (SIP) has been attributed to the generation of most ice particles observed in precipitating clouds with cloud tops warmer than −36°C, from various aircraft- and ground-based field observations across the globe. One of the known SIP mechanisms is fragmentation during collisions among ice particles. It has been studied with our theoretical formulation, which has been applied in microphysical schemes of atmospheric models in a few studies. These have predicted an extensive impact on cloud glaciation and radiative properties. However, there has been a lack of experimental field studies, especially involving naturally falling snowflakes, to better understand this particular mechanism of SIP. This study reports the first field measurements with modern technology for fragmentation during collisions between naturally falling snowflakes and graupel/hail particles. This was observed with an innovatively designed portable chamber that was deployed outdoors in northern Sweden. Applying the observations from this field-based study, we optimized the existing formulation for predicting numbers of fragments from collisions of snow with graupel/hail. The observations show the average numbers of fragments per collision for dendritic (3–12 mm) and nondendritic (1–3 mm) snow were about 12 and 1, respectively. This represents a boost of predicted fragment numbers relative to our original formulation published in 2017. The updated formulation for breakup in ice–ice collisions can be implemented in the microphysical schemes of atmospheric models. |
| Τύπος εγγράφου: | Article |
| ISSN: | 1520-0469 0022-4928 |
| DOI: | 10.1175/jas-d-23-0122.1 |
| DOI: | 10.5194/egusphere-egu25-16421 |
| Σύνδεσμος πρόσβασης: | https://pure.au.dk/portal/en/publications/a5a7850e-3cde-4f3b-8bdd-5ad4e3190ab1 https://doi.org/10.1175/JAS-D-23-0122.1 http://www.scopus.com/inward/record.url?scp=85213813433&partnerID=8YFLogxK |
| Rights: | URL: http://www.ametsoc.org/PUBSReuseLicenses |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....a4b107aad77e6db1d2da88bdc5c394d1 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 15200469 00224928 |
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| DOI: | 10.1175/jas-d-23-0122.1 |