Variación estacional de la temperatura media y los flujos advectivos y atmosféricos de calor en un embalse tropical andino

Marín-Ramírez, Arlex; Gómez-Giraldo, Andrés; Román-Botero, Ricardo

doi:10.18257/raccefyn.1081

Cited by 5 publications

(6 citation statements)

References 28 publications

(40 reference statements)

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“…As in typical tropical systems, the longwave radiation and latent heat flux cooling attenuate the solar radiation heating rate, in turn modulated by the cloud cover driven by the latitudinal migration of the ITCZ (Talling and Lemoalle 1998), resulting in a small seasonality of the atmospheric heat flux. The canyon morphometry of Porce II enhances the role of the advective flux on the lake heat budget through the low residence time and the reduced surface area in relation to the lake volume (Hayes et al 2017), as in other canyon reservoirs (Xie et al 2017; Marín‐Ramírez et al 2020), suggesting a different behavior to that of large natural tropical lakes with thermal structure driven by the atmospheric heat budget, as the large tropical lakes of East Africa (Talling and Lemoalle 1998; MacIntyre 2012). Mountain and glacial temperate lakes also exhibit a significant role of the throughflow on the overall heat budget (Carmack et al 1979; Smits et al 2020), but as the seasonality of the atmospheric heat flux is also large, both components are of primary relevance for the seasonal course of the lake mean temperature, as we discuss further below.…”

Section: Discussionmentioning

confidence: 99%

“…We modified Marín‐Ramírez et al (2020) formulation to calculate changes in the lake mean temperature by atmospheric and advective heat fluxes (Supporting Information Methods S1)

\frac{normalΔ T_{m}}{normalΔ t} = \frac{A_{s} NHF}{V_{f} ρ C_{p}} + \frac{{\overset{Q}{true}}_{\inf}}{V_{f}} ((), {\overset{true¯}{T}}_{\inf} - {T_{normalm}}_{0}) - \frac{{\overset{Q}{true}}_{out}}{V_{f}} ((), {\overset{true¯}{T}}_{out} - {T_{normalm}}_{0})

where

V

is the lake volume;

A_{s}

is the lake surface area;

C_{p}

is the specific heat of water;

ρ

is the water density (UNESCO 1981);

NHF

is the net atmospheric heat flux;

T_{\inf}

and

Q_{\inf}

are the river temperature and discharge;

T_{out}

and

Q_{out}

are the outflow temperature and discharge;

normalΔ T_{m}

is the change of the mean temperature of the lake (

T_{m}

) over the time interval

normalΔ t

; the overbar indicates averaging over the time interval; and the subscripts

0

and

f

refer to variables at the beginning and the end of the interval, respectively. The terms at the right‐hand side represent the rate of change of

T_{m}

produced by the atmospheric, inflow and outflow heat fluxes, respectively, which we compared to determine their fr...…”

Section: Methodsmentioning

confidence: 99%

“…Riverine inflows have been shown to influence the heat budget and thermal structure of tropical (Xing et al 2012; Marín‐Ramírez et al 2020) and subtropical reservoirs (Ma et al 2015; Xie et al 2017), and mountain (Carmack et al 1979) and glacial (Smits et al 2020) temperate lakes. Its relevance on the lake heat budget depends on the magnitude of its heat flux compared to the atmospheric one, and has often been classified according to the flushing time (Monsen et al 2002), calculated as the ratio between the lake volume

V

and the inflow discharge

Q_{\inf}

(

V / Q_{\inf}

), and interpreted as a bulk measure of the lake residence time (Wiegand et al 1982; Carmack et al 1986; Råman Vinnå et al 2018).…”

mentioning

confidence: 99%

“…Its relevance on the lake heat budget depends on the magnitude of its heat flux compared to the atmospheric one, and has often been classified according to the flushing time (Monsen et al 2002), calculated as the ratio between the lake volume

V

and the inflow discharge

Q_{\inf}

(

V / Q_{\inf}

), and interpreted as a bulk measure of the lake residence time (Wiegand et al 1982; Carmack et al 1986; Råman Vinnå et al 2018). During large inflows (low residence times), they can dominate the lake temperature evolution as they change it at higher rates than the atmospheric heat flux; while at times of small flows (large residence times), the atmospheric flux is likely to be the dominant driver (Xie et al 2017; Marín‐Ramírez et al 2020).…”

mentioning

confidence: 99%

“…In tropical Andean reservoirs, the high and cool inflows during the wet season homogenize the water column of the lake below a shallow surface mixed layer; in dry seasons, warmer inflows enter at intermediate depths, favoring the development of a thick metalimnion with sharper temperature gradients at its top and base (Gómez‐Giraldo et al 2013; Román‐Botero et al 2013; Marín‐Ramírez et al 2020). The extent to which these changes in thermal structure influence the seasonality of the observed internal wave field is unknown (Vidal et al 2007; Bernhardt and Kirillin 2013; Arnon et al 2019).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Effects of riverine inflows on the climatology of a tropical Andean reservoir

Posada-Bedoya

Gómez-Giraldo

Román-Botero

2021

Limnology & Oceanography

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Field data and numerical modeling were used to investigate the effects of the riverine inflows on the seasonality of the lake mean temperature, thermal structure, and basin‐scale internal waves in a tropical Andean reservoir. Lake temperature and external forcing were measured during contrasting hydrological periods modulated by severe cold (2011–2012) and warm (2015–2016) phases of El Niño–Southern Oscillation (ENSO), a major driver of Andes hydrology. The seasonal heat budget of the reservoir was driven by the competing rates of cooling by the inflow and heating through the surface. As the atmospheric heating rate remained roughly constant, the seasonality of the river inflow heat flux drove the seasonal reservoir temperature. The inflow also intervened on the heat transport within the reservoir and, during dry periods, mixed heat downward from the surface layer and introduced heat at intermediate depths such that a thick metalimnion formed that brought the V2H1 mode into resonance with the diurnal wind forcing. During wet periods, the inflow compressed and cooled the metalimnion, tuning the V1H1 mode to resonate with the diurnal wind. It was also observed that large inflows destroyed temporarily coherent basin‐scale internal wave motions. Because of the dominant role of the inflow on the seasonal reservoir temperature, changes within the reservoir will be more strongly related to changing temperature and volume of the incoming water than atmospheric forcing as in many large natural lakes.

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Section: Discussionmentioning

confidence: 99%

“…We modified Marín‐Ramírez et al (2020) formulation to calculate changes in the lake mean temperature by atmospheric and advective heat fluxes (Supporting Information Methods S1)