Interannual hydroclimatic variability and the 2009–2011 extreme ENSO phases in Colombia: from Andean glaciers to Caribbean lowlands

Bedoya-Soto, Juan Mauricio; Poveda, Germán; Trenberth, Kevin E.; Velez-Upegui, Jorge Julian

doi:10.1007/s00704-018-2452-2

Cited by 44 publications

(31 citation statements)

References 56 publications

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“…Numerous studies exist on the influence of El Niño-Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO) on tropical glaciers in the Andes [23,[28][29][30][31][32][33][34], but are less frequent for Australasia [21]. During El Niño events, a rise in air temperature and reduction in precipitation have been observed throughout the tropics [35][36][37]. Since the late 1970s, the frequency of El Niño and the occurrences of warm phases of PDO have been increasing [2,38], which coincides with the general rapid shrinkage of the tropical glaciers.…”

Section: Causes Of Glacier Recessionmentioning

confidence: 99%

Global Disappearance of Tropical Mountain Glaciers: Observations, Causes, and Challenges

Veettil

Kamp

2019

Geosciences

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This article reviews the current status of tropical glaciers in the South American Andes, East Africa, and Australasia by shedding light on past, present, and future glacier coverage in the tropics, the influence of global and regional climates on the tropical glaciers, the regional importance of these glaciers, and challenges of ongoing glacier recessions. While tropical glaciers have predominantly receded since the Little Ice Age, the rate of shrinkage has accelerated since the late 1970s as a result of climate changes. As a result, socio-ecological implications occur around ecosystem health, natural hazards, freshwater resources, agriculture, hydropower, mining, human and animal health, traditions and spirituality, and peace.

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Section: Causes Of Glacier Recessionmentioning

confidence: 99%

Global Disappearance of Tropical Mountain Glaciers: Observations, Causes, and Challenges

Veettil

Kamp

2019

Geosciences

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“…Regarding the spatial pattern of long-term mean precipitation, Snow (1976) refers to the Colombian Andes as "a dry island in a sea of rain." Diverse studies have tackled the spatio-temporal variability of rainfall over the Colombian Andes (Schmidt, 1952;Trojer, 1959;López and Howell, 1967;Snow, 1976;Oster, 1979;Martínez, 1993;Poveda and Mesa, 1997;Mejía et al, 1999;León and Narávez, 2001;Poveda et al, 2001Poveda et al, , 2005Poveda et al, , 2007Poveda et al, , 2011Mapes et al, 2003a;Poveda, 2004Poveda, , 2011Zuluaga and Poveda, 2004;Pabón and Dorado, 2008;Hurtado and Poveda, 2009;Alvarez-Villa et al, 2011;Hurtado-Montoya and Mesa-Sánchez, 2014;Poveda and Salas, 2015;Salas and Poveda, 2015;Jaramillo et al, 2017;Bedoya-Soto et al, 2018). In spite of such large body of literature, the dynamical and thermodynamical processes associated with rainfall over the Andes of Colombia are largely unknown, more so at high spatial and temporal resolutions.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Shift of the Diurnal Cycle of Rainfall Over Medellin's Valley, Central Andes of Colombia (1998–2005)

et al. 2019

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The spatiotemporal variability of precipitation in regions of complex mountainous terrains constitutes one of the most challenging research topics of geosciences. This paper explores hourly precipitation data from a set of 25 stations spanning the period 1998 to 2005 within northwestern Colombia, in the Aburrá Valley and the neighboring San Nicolás plateau (75.16 • W−6 • N and 75.66 • W−6.6 • N) which accounts for a land area of ∼4,000 km 2. Our aim is to identify the main features of the diurnal cycle of precipitation over this complex terrain. We found that the average diurnal cycle of rainfall in the study region is bimodal at regional scale although it results from the superposition of two unimodal diurnal cycles shifting its phase throughout the seasons of the year. From October to April, average diurnal rainfall peaks in the afternoon hours (13:00-16:00 LST) but from May to September, the phase of the diurnal cycle changes to midnight hours (22:00-02:00 LST). Three low-level jets (LLJs), namely Caribbean, CHOCO, and the so-called Corriente de los Andes Orientales (CAO), are relevant to explain the seasonal shift of the diurnal cycle given their modulation of the seasonal variation of moisture sources and transport over this region. During June-July-August, moisture from afternoon evaporation processes at the bottom of the inter-Andean Magdalena Valley, located at the east of the study region, is transported by anabatic and easterly trade winds and contribute to explain the midnight and early morning peak. The life cycle of convective processes influences the orographic nature of rainfall distribution and timing in the region since deep convective cores are related with the afternoon peak, whereas wide convective cores with the early morning peak.

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“…This area has an average monthly temperature of 19°C, bimodal rainfall regime associated with the Intertropical Confluence Zone ITCZ [24,25], average annual rainfall of 3,137 mm, which is of great hydrological importance, and a mean hydric yield of 61.18 L/s/km 2 [26]. This region is also strongly influenced by El Niño South Oscillation, ENSO [27].…”

Section: Understanding the Cornare Regionmentioning

confidence: 99%

Redesign of a water quantity, quality, and sediment-monitoring network in a tropical region

Velez-Upegui

Londoño-Carvajal

Solorzano-Gómez

et al. 2020

redin

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The CORNARE region, located in Antioquia (Colombia), required a redesign of its water quantity, quality, and sediment-monitoring network, in order to collect convincing data to help decision-makers to respond to different technical and environmental issues. This paper proposes a methodology which is based on secondary information and which employs Geographical Information System –GIS- tools and knowledge of the region, given that historical data are unavailable in most of the region. Although the main methodology, which applied physical, anthropic, and economic factors was the same for all networks, specific strategies were used for water quantity, quality, and sediment networks in the region. These used expert criteria and weight distance methods. The results were satisfactory. Macro-location was implemented for the sites monitored in the CORNARE region, and this indicated that the proposed methodology was adequate for tropical Andean watersheds, where historical data were insufficient and did not permit the use of more complex techniques. This methodology integrates water quantity, water quality and sediment in an integrated hydrological monitoring network.

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Interannual hydroclimatic variability and the 2009–2011 extreme ENSO phases in Colombia: from Andean glaciers to Caribbean lowlands

Cited by 44 publications

References 56 publications

Global Disappearance of Tropical Mountain Glaciers: Observations, Causes, and Challenges

Global Disappearance of Tropical Mountain Glaciers: Observations, Causes, and Challenges

Seasonal Shift of the Diurnal Cycle of Rainfall Over Medellin's Valley, Central Andes of Colombia (1998–2005)

Redesign of a water quantity, quality, and sediment-monitoring network in a tropical region

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