The role of horizontal model resolution in assessing the transport of CO in a middle latitude cyclone using WRF-Chem

Klich, Christopher Adam; Fuelberg, Henry E.

doi:10.5194/acp-14-609-2014

Cited by 19 publications

(25 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-resolution CTM simulations have obvious accuracy advantages over coarse resolution simulations, particularly for small-scale processes (e.g., Stroud et al, 2011;Klich and Fuelberg, 2014;Stock et al, 2014). In this work, we used the adjoint of the nested GEOS-Chem model, at a resolution of 0.5 • × 0.67 • , to constrain North American CO emissions during the period of June 2004-May 2005.…”

Section: Discussionmentioning

confidence: 99%

“…There have been several studies using high-resolution mesoscale models for inversion analyses (e.g. Stroud et al, 2011;Valin et al, 2011;Klich and Fuelberg, 2014;Stock et al, 2014) with the lateral boundary conditions provided from global, coarse resolution models (e. g. Curci et al, 2010;Peylin et al, 2011). However, the consistency of boundary conditions becomes a critical issue in these regional analyses (e.g.…”

Section: Z Jiang Et Al: Regional Data Assimilation Of Multi-spectramentioning

confidence: 99%

“…6b). The inability of the assimilation to more strongly reduce the bias is likely due to limited MOPITT observational coverage over South America, associated with cloud cover (Keller et al, 2015).…”

Section: Optimization On the Initial And Boundary Conditionsmentioning

confidence: 99%

“…Thus, assimilating TES and MOPITT with the Kalman filter may help further reduce the bias the southern boundary conditions. Another promising approach is the weak-constrained 4D-Var technique, recently implemented in GEOS-Chem by Keller et al (2015), in which the cost function Eq. (2) is augmented with an addition term to mitigate the model transport errors.…”

Section: Optimization On the Initial And Boundary Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

Regional data assimilation of multi-spectral MOPITT observations of CO over North America

et al. 2015

View full text Add to dashboard Cite

Abstract. Chemical transport models (CTMs) driven with high-resolution meteorological fields can better resolve small-scale processes, such as frontal lifting or deep convection, and thus improve the simulation and emission estimates of tropospheric trace gases. In this work, we explore the use of the GEOS-Chem four-dimensional variational (4D-Var) data assimilation system with the nested high-resolution version of the model (0. With optimized lateral boundary conditions, regional inversion analyses can reduce the sensitivity of the CO source estimates to errors in long-range transport and in the distributions of the hydroxyl radical (OH), the main sink for CO. To further limit the potential impact of discrepancies in chemical aging of air in the free troposphere, associated with errors in OH, we use surface-level multispectral MOPITT (Measurement of Pollution in The Troposphere) CO retrievals, which have greater sensitivity to CO near the surface and reduced sensitivity in the free troposphere, compared to previous versions of the retrievals. We estimate that the annual total anthropogenic CO emission from the contiguous US 48 states was 97 Tg CO, a 14 % increase from the 85 Tg CO in the a priori. This increase is mainly due to enhanced emissions around the Great Lakes region and along the west coast, relative to the a priori. Sensitivity analyses using different OH fields and lateral boundary conditions suggest a possible error, associated with local North American OH distribution, in these emission estimates of 20 % during summer 2004, when the CO lifetime is short. This 20 % OH-related error is 50 % smaller than the OH-related error previously estimated for North American CO emissions using a global inversion analysis. We believe that reducing this OH-related error further will require integrating additional observations to provide a strong constraint on the CO distribution across the domain. Despite these limitations, our results show the potential advantages of combining high-resolution regional inversion analyses with global analyses to better quantify regional CO source estimates.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Z Jiang Et Al: Regional Data Assimilation Of Multi-spectramentioning

confidence: 99%

Section: Optimization On the Initial And Boundary Conditionsmentioning

confidence: 99%

Section: Optimization On the Initial And Boundary Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

Regional data assimilation of multi-spectral MOPITT observations of CO over North America

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Regional models are also commonly used for policy analysis with yearly simulation in "scenario modes" [30] or for climate impact studies [31]. The meteorological conditions influencing the development of deep convection, such as mixing depth, local thermodynamic variability, and wind velocity, are best resolved by models having much higher resolution than current global CTMs [32,33]. The added value of a finer resolution is also mentioned for models in other recent studies for the transport of dust in West Asia [34,35].…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of the CHIMERE Chemistry Transport Model to Simulate Dust Outbreaks across the Northern Hemisphere in March 2014

et al. 2017

View full text Add to dashboard Cite

Abstract:Mineral dust is one of the most important aerosols over the world, affecting health and climate. These mineral particles are mainly emitted over arid areas but may be long-range transported, impacting the local budget of air quality in urban areas. While models were extensively used to study a single specific event, or make a global analysis at coarse resolution, the goal of our study is to simultaneously focus on several affected areas-Europe, North America, Central Asia, east China and the Caribbean area-for a one-month period, March 2014, avoiding any parameter fitting to better simulate a single dust outbreak. The simulation is performed for the first time with the hemispheric version of the CHIMERE model, with a high horizontal resolution (about 10 km). In this study, an overview of several simultaneous dust outbreaks over the Northern Hemisphere is proposed to assess the capability of such modeling tools to predict dust pollution events. A quantitative and qualitative evaluation of the most striking episodes is presented with comparisons to satellite data, ground based particulate matter and calcium measurements. Despite some overestimation of dust concentrations far from emission source areas, the model can simulate the timing of the arrival of dust outbreaks on observational sites. For instance, several spectacular dust storms in the US and China are rather well captured by the models. The high resolution provides a better description and understanding of the orographic effects and the long-range transport of dust plumes.

show abstract

Modeled Full‐Flight Aircraft Emissions Impacts on Air Quality and Their Sensitivity to Grid Resolution

et al. 2017

View full text Add to dashboard Cite

Aviation is a unique anthropogenic source with four‐dimensional varying emissions, peaking at cruise altitudes (9–12 km). Aircraft emission budgets in the upper troposphere lower stratosphere region and their potential impacts on upper troposphere and surface air quality are not well understood. Our key objective is to use chemical transport models (with prescribed meteorology) to predict aircraft emissions impacts on the troposphere and surface air quality. We quantified the importance of including full‐flight intercontinental emissions and increased horizontal grid resolution. The full‐flight aviation emissions in the Northern Hemisphere contributed ~1.3% (mean, min–max: 0.46, 0.3–0.5 ppbv) and 0.2% (0.013, 0.004–0.02 μg/m3) of total O3 and PM2.5 concentrations at the surface, with Europe showing slightly higher impacts (1.9% (O3 0.69, 0.5–0.85 ppbv) and 0.5% (PM2.5 0.03, 0.01–0.05 μg/m3)) than North America (NA) and East Asia. We computed seasonal aviation‐attributable mass flux vertical profiles and aviation perturbations along isentropic surfaces to quantify the transport of cruise altitude emissions at the hemispheric scale. The comparison of coarse (108 × 108 km2) and fine (36 × 36 km2) grid resolutions in NA showed ~70 times and ~13 times higher aviation impacts for O3 and PM2.5 in coarser domain. These differences are mainly due to the inability of the coarse resolution simulation to capture nonlinearities in chemical processes near airport locations and other urban areas. Future global studies quantifying aircraft contributions should consider model resolution and perhaps use finer scales near major aviation source regions.

show abstract

The role of horizontal model resolution in assessing the transport of CO in a middle latitude cyclone using WRF-Chem

Cited by 19 publications

References 86 publications

Regional data assimilation of multi-spectral MOPITT observations of CO over North America

Regional data assimilation of multi-spectral MOPITT observations of CO over North America

An Evaluation of the CHIMERE Chemistry Transport Model to Simulate Dust Outbreaks across the Northern Hemisphere in March 2014

Modeled Full‐Flight Aircraft Emissions Impacts on Air Quality and Their Sensitivity to Grid Resolution

Contact Info

Product

Resources

About