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ANALISI DELLE PRECIPITAZIONI SOLIDE IN DUE SITI A
QUOTE DIVERSE: AWS ARPA SANTA CATERINA E AWS
GHIACCIAIO DEI FORNI (VALFURVA, ALTA VALTELLINA)
Relatore: Prof.ssa Guglielmina Diolaiuti
Correlatore: PhD Antonella Senese
Tesi di laurea di:
Stefano LANZI
Anno Accademico 2014 / 2015
UNIVERSITÀ DEGLI STUDI DI MILANO
Facoltà di Scienze e Tecnologie
Corso di Laurea in Scienze Naturali
Obiettivo della ricerca
Individuare le eventuali relazioni tra le precipitazioni solide
registrate da due stazioni meteorologiche automatiche
posizionate a quote diverse lungo la valle dei Forni
Area di studio
Valfurva (Alta Valtellina, Parco Nazionale dello Stelvio)
• AWS SC  (Santa Caterina Valfurva)
• AWS1 Forni  (Ghiacciaio dei Forni)
AWS SC
AWS1 Forni
Caratteristiche AWS SC
• 1730 m s.l.m.
• Sensori:
‐ Termometro
‐ Igrometro
‐ Anemoscopio
‐ Anemometro
‐ Pluviometro riscaldato
‐ Nivometro ad ultrasuoni
‐ Pyranometro
Caratteristiche AWS1 Forni
• 2631 m s.l.m.
• Sensori:
‐ Termoigrometro
‐ Barometro
‐ Anemoscopio
‐ Anemometro
‐ Radiometro
‐ Pluviometro (non riscaldato)
‐ 2 Nivometri ad ultrasuoni
‐ Snow pillow
‐ Fotocamera automatica
Strumenti utilizzati – AWS1 Forni
Campbell SR50Sommer USH-8
Correzione dati Campbell SR50:
Distanza = Lettura ∗
𝐓 + 273.15
273.15
Spessore neve = H − Distanza
Fotocamera automatica
Disponibilità dati
: Dati continui
: Dati intermittenti
: Dati assenti
Risultati
46.5 cm (24/02/2015)
Presenza di neve al suolo: 16/01/2015 – 20/03/2015  63 giorni
Precipitazioni solide e liquide presso la AWS SC
40.5 cm (16/01/2015)
Spessore di neve al suolo presso la AWS1 Forni
244.8 cm (5/04/2015)
Presenza di neve al suolo: 22/10/2014 – 21/06/2015  242 giorni
211.0 cm
68.2 cm (5/11/2014)
Confronto tra gli eventi nevosi dedotti dalla fotocamera automatica della AWS1 Forni e
le precipitazioni registrate negli stessi periodi presso la AWS SC
Da 10/10/2014 a 04/01/2015
Eventi nevosi
Fotocamera automatica 39
Pluviometro SC 22 (56%)
Confronto tra i nivometri della AWS SC e della AWS1 Forni
Conclusioni
• Quando nevica a Santa Caterina Valfurva è in corso una
nevicata anche sul Ghiacciaio dei Forni
• NB: la relazione non è inversa; non necessariamente quando
viene registrata una nevicata sul Ghiacciaio si sta verificando
una precipitazione nevosa anche a Santa Caterina Valfurva
• Ulteriori analisi (con un dataset più lungo e continuo) e/o
con dati provenienti da altre AWS lungo la Valle di Forni
consentiranno di modellare le precipitazioni solide
distribuite su tutta la superficie del Ghiacciaio dei Forni
GRAZIE
PER L’ATTENZIONE
Confronto tra gli eventi nevosi dedotti dalla fotocamera automatica della AWS1 Forni e
le precipitazioni registrate negli stessi periodi presso la AWS SC
Da 10/10/2014 a 04/01/2015
Eventi nevosi
Fotocamera automatica 39
Pluviometro SC 22 (56%)
Ghiacciaio dei Forni Santa Caterina Valfurva
Eventi nevosi
Pluviometro SC 26
Fotocamera automatica 16 (62%)

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Analisi delle precipitazioni tra due AWS poste a quote diverse

  • 1. ANALISI DELLE PRECIPITAZIONI SOLIDE IN DUE SITI A QUOTE DIVERSE: AWS ARPA SANTA CATERINA E AWS GHIACCIAIO DEI FORNI (VALFURVA, ALTA VALTELLINA) Relatore: Prof.ssa Guglielmina Diolaiuti Correlatore: PhD Antonella Senese Tesi di laurea di: Stefano LANZI Anno Accademico 2014 / 2015 UNIVERSITÀ DEGLI STUDI DI MILANO Facoltà di Scienze e Tecnologie Corso di Laurea in Scienze Naturali
  • 2. Obiettivo della ricerca Individuare le eventuali relazioni tra le precipitazioni solide registrate da due stazioni meteorologiche automatiche posizionate a quote diverse lungo la valle dei Forni
  • 3. Area di studio Valfurva (Alta Valtellina, Parco Nazionale dello Stelvio) • AWS SC  (Santa Caterina Valfurva) • AWS1 Forni  (Ghiacciaio dei Forni) AWS SC AWS1 Forni
  • 4. Caratteristiche AWS SC • 1730 m s.l.m. • Sensori: ‐ Termometro ‐ Igrometro ‐ Anemoscopio ‐ Anemometro ‐ Pluviometro riscaldato ‐ Nivometro ad ultrasuoni ‐ Pyranometro
  • 5. Caratteristiche AWS1 Forni • 2631 m s.l.m. • Sensori: ‐ Termoigrometro ‐ Barometro ‐ Anemoscopio ‐ Anemometro ‐ Radiometro ‐ Pluviometro (non riscaldato) ‐ 2 Nivometri ad ultrasuoni ‐ Snow pillow ‐ Fotocamera automatica
  • 6. Strumenti utilizzati – AWS1 Forni Campbell SR50Sommer USH-8 Correzione dati Campbell SR50: Distanza = Lettura ∗ 𝐓 + 273.15 273.15 Spessore neve = H − Distanza Fotocamera automatica
  • 7. Disponibilità dati : Dati continui : Dati intermittenti : Dati assenti
  • 8. Risultati 46.5 cm (24/02/2015) Presenza di neve al suolo: 16/01/2015 – 20/03/2015  63 giorni Precipitazioni solide e liquide presso la AWS SC 40.5 cm (16/01/2015)
  • 9. Spessore di neve al suolo presso la AWS1 Forni 244.8 cm (5/04/2015) Presenza di neve al suolo: 22/10/2014 – 21/06/2015  242 giorni 211.0 cm 68.2 cm (5/11/2014)
  • 10. Confronto tra gli eventi nevosi dedotti dalla fotocamera automatica della AWS1 Forni e le precipitazioni registrate negli stessi periodi presso la AWS SC Da 10/10/2014 a 04/01/2015 Eventi nevosi Fotocamera automatica 39 Pluviometro SC 22 (56%)
  • 11. Confronto tra i nivometri della AWS SC e della AWS1 Forni
  • 12. Conclusioni • Quando nevica a Santa Caterina Valfurva è in corso una nevicata anche sul Ghiacciaio dei Forni • NB: la relazione non è inversa; non necessariamente quando viene registrata una nevicata sul Ghiacciaio si sta verificando una precipitazione nevosa anche a Santa Caterina Valfurva • Ulteriori analisi (con un dataset più lungo e continuo) e/o con dati provenienti da altre AWS lungo la Valle di Forni consentiranno di modellare le precipitazioni solide distribuite su tutta la superficie del Ghiacciaio dei Forni
  • 14. Confronto tra gli eventi nevosi dedotti dalla fotocamera automatica della AWS1 Forni e le precipitazioni registrate negli stessi periodi presso la AWS SC Da 10/10/2014 a 04/01/2015 Eventi nevosi Fotocamera automatica 39 Pluviometro SC 22 (56%) Ghiacciaio dei Forni Santa Caterina Valfurva Eventi nevosi Pluviometro SC 26 Fotocamera automatica 16 (62%)