Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Chemical composition of freshsnow samples from the southern slope of Mt. Everest region (Khumbu-Himal region, Nepal) |
| Abstract | In 1998 fresh surface snow samples were collected, no more than 2 days after the snowfall, along the Khumbu valley, and its lateral valleys (Kongmala and Changri Nup), at the end of the summer monsoon period. Samples from the Island Peak and Pumori slopes were also collected by climbers during pre- and post-monsoon season at altitudes ranging from 5300 to 6100m a.s.l. Conductivity, pH and major inorganic ions were measured in samples and relative field blanks. Chemical results were subjected to principal component analysis (PCA) in order to distinguish different sources of ions and study spatial and temporal distribution of ion concentrations. Two main factors, accounting for more than 80% of the total variance, were found. The two factors were correlated to two different sources, one representing local transport and background contribution, and the other related to monsoon circulation. Concentrations of the main ions were compared to those measured in other remote areas, with particular regard to elevated areas in Central Asia |
| Source | Atmospheric environment (1994) 35, pp. 3183–3190 |
| Keywords | Khumbu valleyNepalFreshsnowMonsoon air massInorganic ions |
| Journal | Atmospheric environment (1994) |
| Editor | Pergamon., Oxford, Regno Unito |
| Year | 2001 |
| Type | Articolo in rivista |
| Authors | Marinoni A., Polesello S., Smiraglia C., Valsecchi S. |
| Text | 42063 2001 Khumbu valley Nepal Freshsnow Monsoon air mass Inorganic ions Chemical composition of freshsnow samples from the southern slope of Mt. Everest region Khumbu Himal region, Nepal Marinoni A., Polesello S., Smiraglia C., Valsecchi S. 1 Universita di Milano, 2 IRSA In 1998 fresh surface snow samples were collected, no more than 2 days after the snowfall, along the Khumbu valley, and its lateral valleys Kongmala and Changri Nup , at the end of the summer monsoon period. Samples from the Island Peak and Pumori slopes were also collected by climbers during pre and post monsoon season at altitudes ranging from 5300 to 6100m a.s.l. Conductivity, pH and major inorganic ions were measured in samples and relative field blanks. Chemical results were subjected to principal component analysis PCA in order to distinguish different sources of ions and study spatial and temporal distribution of ion concentrations. Two main factors, accounting for more than 80% of the total variance, were found. The two factors were correlated to two different sources, one representing local transport and background contribution, and the other related to monsoon circulation. Concentrations of the main ions were compared to those measured in other remote areas, with particular regard to elevated areas in Central Asia 35 Il lavoro si inquadra nello studio del trasporto a lunga distanza in aree remote e di alta quota. Lo studio della composizione inorganica principale delle deposizioni ha lo scopo di studiare il meccanismo delle deposizioni in alta quota in funzione della posizione geografica e stagionale, in particolare per capire il ruolo dei monsoni estivi invernali nel trasporto atmosferico a grande distanza Chemical composition of freshsnow samples from the southern slope of Mt. Everest region Khumbu Himal region, Nepal Khumbu98.pdf Articolo in rivista Pergamon. 1352 2310 Atmospheric environment 1994 Atmospheric environment 1994 Atmos. environ. 1994 stefano.polesello POLESELLO STEFANO angela.marinoni MARINONI ANGELA saramaria.valsecchi VALSECCHI SARA MARIA |