Publications des scientifiques de l'IRD

Frappart F., Biancamaria S., Normandin C., Blarel F., Bourrel Luc, Aumont M., Azemar P., Vua P. L., Le Toan T., Lubac B., Darrozes J. (2018). Influence of recent climatic events on the surface water storage of the Tonle Sap Lake. Science of the Total Environment, 636, p. 1520-1533. ISSN 0048-9697.

Titre du document
Influence of recent climatic events on the surface water storage of the Tonle Sap Lake
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000436599000149
Auteurs
Frappart F., Biancamaria S., Normandin C., Blarel F., Bourrel Luc, Aumont M., Azemar P., Vua P. L., Le Toan T., Lubac B., Darrozes J.
Source
Science of the Total Environment, 2018, 636, p. 1520-1533 ISSN 0048-9697
Lakes and reservoirs have been identified as sentinels of climate change. Tonle Sap is the largest lake in both the Mekong Basin and Southeast Asia and because of the importance of its ecosystem, it is has been described as the "heart of the lower Mekong". Its seasonal cycle depends on the annual flood pulse governed by the flow of the Mekong River. This study provides an impact analysis of recent climatic events from El Nino 1997/1998 to El Nino 2015/2016 on surface storage variations in the Tonle Sap watershed determined by combining remotely sensed observations, multispectral images and radar altimetry from 1993 to 2017. The Lake's surface water volume variations are highly correlated with rainy season rainfall in the whole Mekong River Basin (R = 0.84) at interannual time-scale. Extreme droughts and floods can be observed when precipitation deficit and excess is recorded in both the Tonle Sap watershed and the Mekong River Basin during moderate to very strong El Nino/La Nina events (R = -0.70) enhanced by the Pacific Decadal Oscillation (R = -0.68). Indian and Western North Pacific Monsoons were identified as having almost equal influence. Below normal vegetation activity was observed during the first semester of 2016 due to the extreme drought in 2015.
Plan de classement
Sciences du milieu [021] ; Limnologie physique / Océanographie physique [032] ; Hydrologie [062] ; Télédétection [126]
Description Géographique
CAMBODGE ; MEKONG BASSIN ; TONLE SAP LAC ; ASIE DU SUD EST
Localisation
Fonds IRD [F B010073990]
Identifiant IRD
fdi:010073990
Contact