Patterns of Local Circulation in the Itaipu Lake Area: Numerical Simulations of Lake Breeze

Stivari, Sônia Maria Soares; Oliveira, Amauri Pereira de; Karam, Hugo Abi; Soares, Jacyra Ramos

doi:10.1175/1520-0450(2003)042<0037:polcit>2.0.co;2

Cited by 26 publications

(27 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several works have shown that the global climate change has its major impact on the reduction of the amplitude of the diurnal temperature cycle mainly associated to the increasing of cloud cover (Karl et al, 1993). This effect is not likely to act in the case of Itaipu, because the lake breeze induces subsidence over the lake area, inhibiting the cloud formation in the area (Stivari et al, 2003).…”

Section: The Lake Formation Impact On Diurnal Temperature Circlementioning

confidence: 99%

“…No information is available about the impact caused by the Itaipu reservoir on the concentration of sediment, quality of water or presence of weeds and diseases. Stivari et al (2003) investigated numerically the lake breeze circulation in the Itaipu region. The numerical experiments have shown that the land use effect is important in the spatial distribution of the lake breeze circulation and that the topography contributes to modulate the breeze intensity, with the daytime valley-mountain circulation intensifying the lake breeze.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the Climate Impact of the Local Circulation in the Itaipu Lake Area

2005

Self Cite

View full text Add to dashboard Cite

The impact of the Itaipu Lake on the climate and local circulation is investigated here using the meteorological information available in the area. The Itaipu Lake is an artificial water reservoir of 1460 km 2 (approximately 170 km by 7.5 km), formed in 1982 as part of the Itaipu Power Plant. It is situated on the Brazil-Paraguay frontier, in the central portion of Parana River Valley. The analysis of the available meteorological data (air and water temperatures, air relative humidity, precipitation and radiosonde soundings) provides observational evidences supporting the hypothesis that the Itaipu Lake presence has an important impact in the local circulation, inducing a local circulation with lake breeze characteristics showing horizontal wind divergence over the lake during daytime and convergence during nighttime. From the regional point of view, the Itaipu Lake formation has reduced the thermal amplitude of the diurnal air temperature cycle. The precipitation data, investigated here, has not indicated any systematic effect associated to the lake formation. The reason for the apparent inconsistency is that others phenomena (e.g., valley-mountain circulation and El Niño events) could be masking the impact of the lake formation on the rain deficit in the region.

show abstract

Section: The Lake Formation Impact On Diurnal Temperature Circlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Climate Impact of the Local Circulation in the Itaipu Lake Area

2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…Samuelsson and Tjernström used a three-dimensional mesoscale model to show that the main influence factor of the boundary layer flow pattern of Tamnren Lake, which has a water area of only 34 km 2 , was the difference in the surface roughness between the lake and the land [12]. Meanwhile, with the help of a nonhydrostatic mesoscale model, Stivar et al showed that lake breezes caused by the differences in the lake-land temperatures had significant effects on the local circulation in the Itaipu Lake area [13]. Recently, the state-of-the-art Weather Research and Forecasting (WRF) model was applied to simulate the complex structures of low atmosphere flow fields [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

An Analysis of the Physical Characteristics of the Summer Low Atmosphere in the Gobi Desert Adjacent to Bosten Lake, Xinjiang, China

Sun

Ning

et al. 2018

Advances in Meteorology

View full text Add to dashboard Cite

A month-long field observation campaign was conducted, which covered approximately 100 km 2 of the Gobi Desert area on the southeast bank of Bosten Lake during the summer of 2016. The purpose of the study was to examine the physical characteristics of the low atmosphere over land-lake nonuniform underlying surfaces in the Gobi Desert of northwestern China. The results of the statistical analysis showed that, during the observational period, the average daytime surface horizontal thermal gradient reached up to −0.2 ∘ C/km from the lakeshore to southern Gobi Desert area. The near-surface wind field of the 7 km horizontal extent from the lakeshore was dominated by onshore breezes with average peak wind speeds above 5 m/s. In the atmospheric near-surface layer, an isohumidity layer at a height between 10 and 50 m a.g.l. was observed from 11:00 to 18:00 LST. Also, a case study for the atmospheric boundary layer and local circulation analyses was conducted. The onshore breezes were found to play a major role in the vertical structure of the local atmospheric boundary layer. The numerical simulation results indicated that there was an alternating day-night local circulation in the Bosten Lake area.

show abstract

“…Sun et al [1997] employed data from three aircraft to investigate lake-induced circulations over three lakes ranging from 3 to 10 km in width. Stivari et al [2003] used a mesoscale numerical model to investigate the role played by Itaipu Lake (170 km long and 7.5 km wide), and the surrounding topography and land use, on the observed LB mesoscale circulations. Lemmin and D'Adamo [1996] used analyses of wind records from shore stations around Lake Geneva (72 km long and 13.8 km wide) to study the induced LB circulations.…”

Section: Introductionmentioning

confidence: 99%

Ground‐based measurements and dual‐Doppler analysis of 3‐D wind fields and atmospheric circulations induced by a meso‐γ‐scale inland lake

Asefi-Najafabady¹,

Knupp²,

Mecikalski³

et al. 2010

J. Geophys. Res.

View full text Add to dashboard Cite

[1] This paper presents a high-resolution dual-Doppler analysis of lake breeze mesoscale circulation induced by an elongated reservoir with a mean width of ∼2 km and an area of 125 km 2 . Compared to previous meso-g-scale lake breeze studies based on point measurements or aircraft observations, the present study provides both a unique quantification and a high-resolution spatial and temporal 3-D visualization (several hundred meters and 5 min, respectively) of the kinematic structure of the lake breeze initiation and evolution. Visible satellite images show a cloud-free zone over the lake and adjacent land areas that was promoted by subsidence associated with the lake breeze circulation. The background synoptic-scale wind flow was almost parallel to the major axis of the lake, and distinct lake breeze frontal zones formed along both shorelines spanning the length of the lake. DualDoppler analyses showed updrafts in the frontal zones, perturbation horizontal velocities of 1.5 m s −1 on both sides of the lake, and maximum downdrafts of 2 m s −1 centered over the lake. Vertical vorticity in the boundary layer was produced by differential friction between the smooth lake and adjacent land. The circulations are robust and are maintained during the day against a minor change in background wind direction. The study shows that the circulations produced by a small lake can generate significant mesoscale circulations that influence local climatology and identifies the importance of including such small mesoscale processes in global forecast models.Citation: Asefi-Najafabady, S., K. Knupp, J. R. Mecikalski, R. M. Welch, and D. Phillips (2010), Ground-based measurements and dual-Doppler analysis of 3-D wind fields and atmospheric circulations induced by a meso-g-scale inland lake, J. Geophys.

show abstract

Patterns of Local Circulation in the Itaipu Lake Area: Numerical Simulations of Lake Breeze

Cited by 26 publications

References 11 publications

On the Climate Impact of the Local Circulation in the Itaipu Lake Area

On the Climate Impact of the Local Circulation in the Itaipu Lake Area

An Analysis of the Physical Characteristics of the Summer Low Atmosphere in the Gobi Desert Adjacent to Bosten Lake, Xinjiang, China

Ground‐based measurements and dual‐Doppler analysis of 3‐D wind fields and atmospheric circulations induced by a meso‐γ‐scale inland lake

Contact Info

Product

Resources

About