Key features of cold‐air pool episodes in the northeast of the Iberian Peninsula (Cerdanya, eastern Pyrenees)

Miró, Josep Ramon; Peña, Juan Carlos; Pepin, Nick; Sairouni, Abdelmalik; Aran, Montserrat

doi:10.1002/joc.5236

Cited by 21 publications

(25 citation statements)

References 47 publications

(69 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…surrounding landscape and the whole domain. Nocturnal temperature inversions depends on terrain morphology, which determines where cool pools are formed (Miró et al, 2010;Miró et al, 2017).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Land use and topography influence in a complex terrain area: A high resolution mesoscale modelling study over the Eastern Pyrenees using the WRF model

Jiménez‐Esteve

Udina

Soler

et al. 2018

Atmospheric Research

View full text Add to dashboard Cite

Different types of land use (LU) have different physical properties which can change local energy balance and hence vertical fluxes of moisture, heat and momentum. This in turn leads to changes in near-surface temperature and moisture fields. Simulating atmospheric flow over complex terrain requires accurate local-scale energy balance and therefore model grid spacing must be sufficient to represent both topography and land-use. In this study we use both the Corine Land Cover (CLC) and United States Geological Survey (USGS) land use databases for use with the Weather Research and Forecasting (WRF) model and evaluate the importance of both land-use classification and horizontal resolution in contributing to successful modelling of surface temperatures and humidities observed from a network of 39 sensors over a 9 day period in summer 2013. We examine case studies of the effects of thermal inertia and soil moisture availability at individual locations. The scale at which the LU classification is observed influences the success of the model in reproducing observed patterns of temperature and moisture. Statistical validation of model output demonstrates model sensitivity to both the choice of LU database used and the horizontal resolution. In general, results show that on average, by a) using CLC instead of USGS and/or b) increasing horizontal resolution, model performance is improved. We also show that the sensitivity to these changes in the model performance shows a daily cycle.

show abstract

Section: Accepted M Manuscriptmentioning

confidence: 99%

Land use and topography influence in a complex terrain area: A high resolution mesoscale modelling study over the Eastern Pyrenees using the WRF model

Jiménez‐Esteve

Udina

Soler

et al. 2018

Atmospheric Research

View full text Add to dashboard Cite

show abstract

“…The most widely used spatio‐temporal fixed air temperature lapse rate is the mean environmental lapse rate (MELR: −6.5 °C/km); this parameter was presented by Barry and Chorley () as a global lapse rate calculated for the free atmosphere air temperature, and not for near‐surface air temperature. However, caution is required in use of the MELR because of the spatio‐temporal variability of near‐surface air temperature lapse rates (Pepin et al, ; ; Rolland, ; Lundquist and Cayan, ; Blandford et al, ; Minder et al, ; Dumas, ; Kattel et al, ; Miró et al, ), especially in areas covered by ice or snow (Braun and Hock, ). This is because the fixed MELR assumes no changes among seasons, synoptic conditions, or topographic complexity (Barry, ).…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have reported significant temporal variability in NSLR at daily and seasonal scales in various mountain regions including the Rocky (Kunkel, 1989;Pepin and Losleben, 2002;Blandford et al, 2008) and Appalachian (Bolstad et al, 1998) mountains in the United States, in China (Fang and Yoda, 1988;Tang and Fang, 2006;Du et al, 2010), the Himalayan mountains (Kattel et al, 2013;Immerzeel et al, 2014), the Alps (Rolland, 2003;Dumas, 2013;Kirchner et al, 2013;Nigrelli et al, 2017), and polar areas (Marshall et al, 2007). These studies have reported steeper NSLRs under unstable atmospheric conditions, and marked differences in NSLR have been found as a function of synoptic conditions (Pepin et al, 1999;Pepin, 2001;Blandford et al, 2008;Holden and Rose, 2011;Kirchner et al, 2013;Miró et al, 2018). These findings indicate that these effects need to be taken into account when analysing the temporal and spatial evolution of the NSLR.…”

mentioning

confidence: 96%

Estimation of near‐surface air temperature lapse rates over continental Spain and its mountain areas

Navarro-Serrano

López‐Moreno

Azorín-Molina

et al. 2018

Intl Journal of Climatology

View full text Add to dashboard Cite

Although the mean environmental lapse rate (MELR) value (a linear decrease of −6.5 °C/km) is the most widely used, near‐surface (i.e., non‐free atmosphere) air temperature lapse rates (NSLRs; measured at ~1.5 m height) are variable in space and time because of their dependence on topography and meteorological conditions. In this study we conducted the first analysis of the spatial and temporal variability of NSLRs for continental Spain and their relationship to synoptic atmospheric circulation (circulation weather types [CWTs]), focusing on major mountain areas including the Pyrenees, Cantabrian, Central, Baetic, and Iberian ranges. The results showed that the NSLR varied markedly at spatial and seasonal scales and depended on the dominant atmospheric conditions. The median NSLR values were weaker (less negative) than the MELR for the mountain areas (Pyrenees −5.17 °C/km; Cantabrian range −5.22 °C/km; Central range −5.78 °C/km; Baetic range −4.83 °C/km; Iberian range −5.79 °C/km) and for the entire continental Spain (−5.28 °C/km). For the entire continental Spain the steepest NSLR values were found in April (−5.80 °C/km), May (−5.58 °C/km), and October (−5.54 °C/km) because of the dominance of northerly and westerly advections of cold air. The weakest NSLR values were found in July (−4.67 °C/km) and August (−4.78 °C/km) because of the inland heating, and in winter because of the occurrence of thermal inversions. As the use of the MELR involves the assumption of large errors, we propose 1 zonal, 12 monthly, 11 CWTs, and 132 hybrid monthly–CWTs NSLRs for each of the mountain ranges and for the entire continental Spain. More regional studies are urgently needed to accurately assess the NSLR as a function of atmospheric circulation conditions.

show abstract

“…It is a singular basin due to its orographic configuration which predisposes the formation of cold air pools, mountain gravity waves and enhanced precipitation (Trapero et al, 2013, Miró et al, 2018.…”

Section: 5mentioning

confidence: 99%

10th European Conference on Radar in Meteorology and Hydrology (ERAD 2018) : 1-6 July 2018, Ede-Wageningen, The Netherlands

Vos¹,

Leijnse²,

Uijlenhoet³

2018

View full text Add to dashboard Cite

Key features of cold‐air pool episodes in the northeast of the Iberian Peninsula (Cerdanya, eastern Pyrenees)

Cited by 21 publications

References 47 publications

Land use and topography influence in a complex terrain area: A high resolution mesoscale modelling study over the Eastern Pyrenees using the WRF model

Land use and topography influence in a complex terrain area: A high resolution mesoscale modelling study over the Eastern Pyrenees using the WRF model

Estimation of near‐surface air temperature lapse rates over continental Spain and its mountain areas

10th European Conference on Radar in Meteorology and Hydrology (ERAD 2018) : 1-6 July 2018, Ede-Wageningen, The Netherlands

Contact Info

Product

Resources

About