DOI: 10.5194/hess-22-5445-2018
论文题名: Recent evolution and associated hydrological dynamics of a vanishing tropical Andean glacier: Glaciar de Conejeras; Colombia
作者: Morán-Tejeda E. ; Luis Ceballos J. ; Peña K. ; Lorenzo-Lacruz J. ; López-Moreno I.J.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 10 起始页码: 5445
结束页码: 5461
语种: 英语
Scopus关键词: Atmospheric pressure
; Catchments
; Climatology
; Runoff
; Tropics
; Freshwater reservoirs
; High temporal resolution
; Hydrological cycles
; Hydrological indicators
; Hydrological monitoring
; Hydrological response
; Southern oscillation
; Volcanic activities
; Reservoirs (water)
; catchment
; El Nino-Southern Oscillation
; glacier retreat
; global warming
; hydrographic survey
; hydrological cycle
; hydrological response
; streamflow
; tropical region
; Colombia
英文摘要: Glaciers in the inner tropics are rapidly retreating due to atmospheric warming. In Colombia, this retreat is accelerated by volcanic activity, and most glaciers are in their last stages of existence. There is general concern about the hydrological implications of receding glaciers, as they constitute important freshwater reservoirs and, after an initial increase in melting flows due to glacier retreat, a decrease in water resources is expected in the long term as glaciers become smaller. In this paper, we perform a comprehensive study of the evolution of a small Colombian glacier, Conejeras (Parque Nacional Natural de los Nevados) that has been monitored since 2006, with a special focus on the hydrological response of the glacierized catchment. The glacier shows great sensitivity to changes in temperature and especially to the evolution of the El Ni-o-Southern Oscillation (ENSO) phenomenon, with great loss of mass and area during El Nio warm events. Since 2006, it has suffered a 37% reduction, from 22.45 ha in 2006 to 12 ha in 2017, with an especially abrupt reduction since 2014. During the period of hydrological monitoring (June 2013 to December 2017), streamflow at the outlet of the catchment experienced a noticeable cycle of increasing flows up to mid-2016 and decreasing flows afterwards. The same cycle was observed for other hydrological indicators, including the slope of the rising flow limb and the monthly variability of flows. We observed an evident change in the daily hydrograph, from a predominance of days with a purely melt-driven hydrograph up to mid-2016, to an increase in the frequency of days with flows less influenced by melt after 2016. Such a hydrological cycle is not directly related to fluctuations of temperature or precipitation; therefore, it is reasonable to consider that it is the response of the glacierized catchment to retreat of the glacier. Results confirm the necessity for small-scale studies at a high temporal resolution, in order to understand the hydrological response of glacier-covered catchments to glacier retreat and imminent glacier extinction. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163163
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Morán-Tejeda, E., Department of Geography, University of the Balearic Islands, Palma, Spain; Luis Ceballos, J., Instituto de Hidrología, Meteorología y Estudios Ambientales, Bogotá, Colombia; Peña, K., Instituto de Hidrología, Meteorología y Estudios Ambientales, Bogotá, Colombia; Lorenzo-Lacruz, J., Department of Geography, University of the Balearic Islands, Palma, Spain; López-Moreno, I.J., Pyrenean Institute of Ecology. Consejo Superior de Investigaciones Científicas, Zaragoza, Spain
Recommended Citation:
Morán-Tejeda E.,Luis Ceballos J.,Peña K.,et al. Recent evolution and associated hydrological dynamics of a vanishing tropical Andean glacier: Glaciar de Conejeras; Colombia[J]. Hydrology and Earth System Sciences,2018-01-01,22(10)