Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Impact of summer monsoon on the elevation-dependence of meteorological variables in the south of central Himalaya |
| Abstract | The South Asian summer monsoon brings abundant precipitation and associated latent heat release to the south of central Himalaya, and alters hydrothermal conditions of this region. This study explored the impact of South Asian summer monsoon on the elevation-dependence of meteorological variables along the south slope of Mt. Everest in the central Himalaya, which is crucial to modelling the glacio-hydrological processes in this elevated region. The data were collected at five stations deployed at 2660-5600 m above sea level (asl) along the slope during 2007-2011. Major findings are the following: (1) The amount of precipitation during the monsoon season usually decreases with elevation but it is relatively uniform between 3600 and 5000 m asl. This uniform profile may be attributed to the monsoon-terrain-land interactions, particularly to the retard effect of glacier cooling on daytime upvalley wind; (2) Cloud shielding effects cause lower solar radiation and higher downward longwave radiation in the monsoon than in the other seasons. In particular, higher elevations have more clouds in the afternoon, resulting in an abnormal elevation-dependence of solar radiation (i.e. higher elevations receive less solar radiation); (3) Strong daytime upvalley wind and moist convection homogenizes the vertical distributions of air mass along the slope, causing a constant lapse rate of both surface air temperature and dew-point temperature (representing humidity) during typical monsoon months, but this phenomenon is not found in the other seasons. These findings provide critical guidance for extrapolating the meteorological variables from lower to higher elevations in this region. |
| Source | International journal of climatology 38 (4), pp. 1748–1759 |
| Keywords | Cloud-radiation interactionElevation dependenceSeasonal variationSummer monsoonTemperature and humidity lapse rate |
| Journal | International journal of climatology |
| Editor | Wiley,, New York, Regno Unito |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1002/joc.5293 |
| Authors | Yang, Kun; Guyennon, Nicolas; Ouyang, Lin; Ouyang, Lin; Tian, Lide; Tartari, Gianni; Salerno, Franco |
| Text | 379052 2018 10.1002/joc.5293 Scopus 2 s2.0 85030323563 ISI Web of Science WOS WOS 000427011700011 Cloud radiation interaction Elevation dependence Seasonal variation Summer monsoon Temperature and humidity lapse rate Impact of summer monsoon on the elevation dependence of meteorological variables in the south of central Himalaya Yang, Kun; Guyennon, Nicolas; Ouyang, Lin; Ouyang, Lin; Tian, Lide; Tartari, Gianni; Salerno, Franco Tsinghua University; Chinese Academy of Sciences; Chinese Academy of Sciences; Istituto di Ricerca sulle Acque, Italy; Chinese Academy of Sciences; National Research Council Water Research Institute IRSA CNR Brugherio The South Asian summer monsoon brings abundant precipitation and associated latent heat release to the south of central Himalaya, and alters hydrothermal conditions of this region. This study explored the impact of South Asian summer monsoon on the elevation dependence of meteorological variables along the south slope of Mt. Everest in the central Himalaya, which is crucial to modelling the glacio hydrological processes in this elevated region. The data were collected at five stations deployed at 2660 5600 m above sea level asl along the slope during 2007 2011. Major findings are the following 1 The amount of precipitation during the monsoon season usually decreases with elevation but it is relatively uniform between 3600 and 5000 m asl. This uniform profile may be attributed to the monsoon terrain land interactions, particularly to the retard effect of glacier cooling on daytime upvalley wind; 2 Cloud shielding effects cause lower solar radiation and higher downward longwave radiation in the monsoon than in the other seasons. In particular, higher elevations have more clouds in the afternoon, resulting in an abnormal elevation dependence of solar radiation i.e. higher elevations receive less solar radiation ; 3 Strong daytime upvalley wind and moist convection homogenizes the vertical distributions of air mass along the slope, causing a constant lapse rate of both surface air temperature and dew point temperature representing humidity during typical monsoon months, but this phenomenon is not found in the other seasons. These findings provide critical guidance for extrapolating the meteorological variables from lower to higher elevations in this region. 38 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85030323563 origin=inward 20/08/2017 Impact of summer monsoon on the elevation dependence of meteorological variables in the south of central Himalaya print Yang_et_al 2018.pdf Articolo in rivista Wiley, 0899 8418 International journal of climatology International journal of climatology Int. j. climatol. International journal of climatology Climatology Royal Meteorological Society journal of climate science gianni.tartari TARTARI GIANNI franco.salerno SALERNO FRANCO nicolasdominique.guyennon GUYENNON NICOLAS DOMINIQUE |