Parameterization of vertical diffusion and the atmospheric boundary layer height determination in the EMEP model

Jeričević, Amela; Kraljević, Lukša; Grisogono, Branko; Fagerli, Hilde; Večenaj, Željko

doi:10.5194/acp-10-341-2010

Cited by 46 publications

(30 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its vertical scale is larger than the characteristic height of the low-level jet of the down-slope component. The representation of katabatic flows in numerical weather prediction models is a challenging task Jeričević et al, 2010).…”

Section: Katabatic Windsmentioning

confidence: 99%

Current challenges in understanding and forecasting stable boundary layers over land and ice

Steeneveld

2014

Front. Environ. Sci.

View full text Add to dashboard Cite

Understanding and prediction of the stable atmospheric boundary layer is challenging. Many physical processes come into play in the stable boundary layer (SBL), i.e., turbulence, radiation, land surface coupling and heterogeneity, orographic turbulent and gravity wave drag (GWD). The development of robust stable boundary-layer parameterizations for weather and climate models is difficult because of the multiplicity of processes and their complex interactions. As a result, these models suffer from biases in key variables, such as the 2-m temperature, boundary-layer depth and wind speed. This short paper briefly summarizes the state-of-the-art of SBL research, and highlights physical processes that received only limited attention so far, in particular orographically-induced GWD, longwave radiation divergence, and the land-atmosphere coupling over a snow-covered surface. Finally, a conceptual framework with relevant processes and particularly their interactions is proposed.

show abstract

Section: Katabatic Windsmentioning

confidence: 99%

Current challenges in understanding and forecasting stable boundary layers over land and ice

Steeneveld

2014

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The model included 20 vertical grid cells with a linear grid resolution of 100 m, extending up to 2000 m a.g.l. The vertical diffusion coefficient (K z ) was calculated based on a slightly modified Grisogono scheme (Jericevic et al, 2010) so that K z in Eq. (1) depends on the height above ground (z), the friction velocity (u * ) and the height of the atmospheric boundary layer (H ):…”

Section: Adchemmentioning

confidence: 99%

Modeling the role of highly oxidized multifunctional organic molecules for the growth of new particles over the boreal forest region

et al. 2017

View full text Add to dashboard Cite

Abstract. In this study, the processes behind observed new particle formation (NPF) events and subsequent organicdominated particle growth at the Pallas AtmosphereEcosystem Supersite in Northern Finland are explored with the one-dimensional column trajectory model ADCHEM. The modeled sub-micron particle mass is up to ∼ 75 % composed of SOA formed from highly oxidized multifunctional organic molecules (HOMs) with low or extremely low volatility. In the model the newly formed particles with an initial diameter of 1.5 nm reach a diameter of 7 nm about 2 h earlier than what is typically observed at the station. This is an indication that the model tends to overestimate the initial particle growth. In contrast, the modeled particle growth to CCN size ranges (> 50 nm in diameter) seems to be underestimated because the increase in the concentration of particles above 50 nm in diameter typically occurs several hours later compared to the observations. Due to the high fraction of HOMs in the modeled particles, the oxygen-to-carbon (O : C) atomic ratio of the SOA is nearly 1. This unusually high O : C and the discrepancy between the modeled and observed particle growth might be explained by the fact that the model does not consider any particle-phase reactions involving semi-volatile organic compounds with relatively low O : C. In the model simulations where condensation of lowvolatility and extremely low-volatility HOMs explain most of the SOA formation, the phase state of the SOA (assumed either liquid or amorphous solid) has an insignificant impact on the evolution of the particle number size distributions. However, the modeled particle growth rates are sensitive to the method used to estimate the vapor pressures of the HOMs. Future studies should evaluate how heterogeneous reactions involving semi-volatility HOMs and other less-oxidized organic compounds can influence the SOA composition-and size-dependent particle growth.

show abstract

“…The latter was calculated through Eq. (7) by knowing: a) the estimation of daily PM 10 emission in the Municipality of Rome (VV.AA., 2013), which is close to 11.23 tons·day −1 ; b) the average height of the boundary layer (BLH) at Rome, which is of about 400 m on average according to Pichelli et al (2014) while a similar average value has been recorded in Pratica di Mare (Jeričević et al, 2010), a village adjoining the MA of Rome; c) the average C p (24.5 μg·m −3 ) recalculated by weighting the results of the ARPA (Regional Environmental Authority) monitoring stations (Arpa Lazio, 2014Lazio, , 2015 in the period September 2014-September 2015.…”

Section: Discussionmentioning

confidence: 85%

212Pb as tracer for PM deposition on urban vegetation

Voltaggio

Spadoni

Carloni

et al. 2016

Science of The Total Environment

View full text Add to dashboard Cite

Parameterization of vertical diffusion and the atmospheric boundary layer height determination in the EMEP model

Cited by 46 publications

References 62 publications

Current challenges in understanding and forecasting stable boundary layers over land and ice

Current challenges in understanding and forecasting stable boundary layers over land and ice

Modeling the role of highly oxidized multifunctional organic molecules for the growth of new particles over the boreal forest region

212Pb as tracer for PM deposition on urban vegetation

Contact Info

Product

Resources

About