Publications des scientifiques de l'IRD

Telesca L., Shaban A., Gascoin S., Darwich T., Drapeau Laurent, El Hage M., Faour G. (2014). Characterization of the time dynamics of monthly satellite snow cover data on Mountain Chains in Lebanon. Journal of Hydrology, 519 (D), p. 3214-3222. ISSN 0022-1694.

Titre du document
Characterization of the time dynamics of monthly satellite snow cover data on Mountain Chains in Lebanon
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000347589600041
Auteurs
Telesca L., Shaban A., Gascoin S., Darwich T., Drapeau Laurent, El Hage M., Faour G.
Source
Journal of Hydrology, 2014, 519 (D), p. 3214-3222 ISSN 0022-1694
In this study, the time dynamics of the monthly means of the snow cover have been on Lebanese Mountain Chains from 2000 to 2012, derived from the MODIS Aqua/Terra satellite snow products was analyzed. This represents the longest satellite-based snow cover time series produced for Lebanon so far. Field survey was also carried out over the last three years in order to measure the in-situ snow/water equivalent and depth in different localities. Analyzing the regime of the snow cover in Mount-Lebanon (Western Mountain Chains) region, it was found that: (i) snowmelt accounts for about 31% of the rivers and springs discharge in Lebanon; (ii) consecutive peaks in the snow cover time series, representing the change-point between accumulation phase and ablation phase are present in three different patterns (edged, non-edged and double peaked); (iii) the areal snow coverage has big diversity between different years; (iv) the annual periodicity represents the most statistically significant and predominant frequency of the series contributing for about the 40% of the total variance of the snow cover series; (v) the longterm trend, totally hidden by the more powerful yearly component and detected by using the singular spectrum analysis (SSA), accounts for about the 33% of the total variance of the series; (vi) the long-term trend shows an apparent cyclic behavior with an estimated period (interval between the two minima) of about nine years; (vii) the comparison of the long-term trend with the North Atlantic Oscillation (NAO) monthly index reveals that the minima in 2009-2010 of the SSA long-term component coincides with a persistent negative phase in the NAO Index.
Plan de classement
Hydrologie [062] ; Télédétection [126]
Description Géographique
LIBAN
Localisation
Fonds IRD [F B010063690]
Identifiant IRD
fdi:010063690
Contact