Effect of Dust Aerosols in Forming the Regional Climate of Georgia

Davitashvili, Teimuraz; Kutaladze, Nato; Kvatadze, R.; Mikuchadze, George

doi:10.12694/scpe.v19i2.1398

Cited by 6 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…RegCM's dynamical core is based on the hydrostatic version of the mesoscale model MM5 of the National Center for Atmospheric Research and is widely used (Dash et al, 2013;Davitashvili et al, 2018;Georg et al, 1994;Pattnayak et al, 2019). Radiative transfer in RegCM uses the parameterization of NCAR's community climate model CCM (Kiehl et al, 1996).…”

Section: Methodsmentioning

confidence: 99%

“…This dust module divides the size distribution of the dust particles into four bins varying from finer (0.01-1.0 μm and 1.0-2.5 μm) to coarser dust aerosols (2.5-5.0 μm and 5.0-20.0 μm). The model uses Mie theory to estimate the aerosol optical and radiative properties (Davitashvili et al, 2018;Santese et al, 2003;Zakey et al, 2006). For the refractive index of dust aerosols, the model uses the Optical Properties of Aerosols and Clouds (OPAC) database (Hess et al, 1998;Zakey et al, 2006).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Recent Changes in Dust over South Asia Using RegCM

Acharya¹,

Sk²,

Vinoj³

2021

Preprint

View full text Add to dashboard Cite

Pre-monsoon dust aerosols over Indian regions are closely linked to the monsoon dynamics and Indian summer monsoon rainfall. Past observational studies have shown a decline in dust loading over the Indian landmass potentially caused by changing rainfall patterns over the desert regions. Such changes are expected to have far reaching impact on regional energy balance and monsoon rainfall. Using a regional climate-chemistry model, RegCM4.5 with an updated land module, we have simulated the long-term (2001-2015) changes in dust over the arid and semi-arid dust source regions of the North-Western part of the sub-continent. It is found that the area-averaged dust aerosol optical depth (AOD) over the arid and semi-arid desert regions has declined by 17% since the start of this millennium. The rainfall over these regions exhibits a positive trend of 0.1 mm day-1year-1 and a net increase of > 50%. The wet deposition is found to be dominant and ~5 fold larger in magnitude over dry deposition and exhibits total changes of ~ 79 % and 48% in the trends in atmospheric dust. As a response, significant change in the surface (11%), top of the atmosphere radiative forcing (7%), and widespread atmospheric cooling are observed in short wave domain of radiation spectrum, over the Northern part of the Indian landmass. Such quantification and long term change studies are necessary for understanding the regional climate change and the water cycle.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Assessment of Recent Changes in Dust over South Asia Using RegCM

Acharya¹,

Sk²,

Vinoj³

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…According to statistics of the National Environmental Agency (NEA) of Georgia, the frequency of natural disasters in recent decades has increased significantly, namely heavy rains increased with dramatic consequences, which undoubtedly is associated with climate change [3]. Heavy rains, hail, floods and drought are the main climatological hazards for the country [5][6][7]. It is reported that floods kills more people, but droughts affect far more number of people and causes more economic damage in Georgia.…”

Section: Icies'2020mentioning

confidence: 99%

Using modern technology to protect vineyards from hail amid climate change

et al. 2021

Self Cite

View full text Add to dashboard Cite

Over the past two decades, Georgia has faced increasingly heavy rainfall, hail and flooding, which especially devastated Kakheti wine region in Southern Georgia, causing severe damage to hundreds of vineyards. Since 2015, 85 anti-hail missile systems have been installed to protect entire Kakheti region, however, for the effective use of a modern anti-hail system, it became necessary to timely forecast extreme weather events of a regional and local scale. Thus, this article aims to develop timely forecasting of strong convection, dangerous precipitation and hail using modern weather forecasting models and radar technologies in Georgia. For this reasons various combinations of the physics parameterization schemes of the WRF-ARW model, the ARL READY system and the data of the modern meteorological radar Meteor 735CDP10 are used to predict the thermodynamic state of the atmosphere and assess the possible level of development of convective processes. The analysis of the calculated results showed that the variants of the microphysics parametrization schemes of the WRF model lead to significant variability in precipitation forecasts on complex terrain. Meanwhile, the upper-air diagrams of the READY system clearly showed the instability of the atmosphere for the cases discussed. Some results of these calculations are presented and analysed in this paper.

show abstract

“…Transportation of dust to the South Caucasus in general and Georgia in particular is associated with the low-and mid-tropospheric flows from the Mediterranean and Black Seas in the west, from the Caspian -Central Asia regions in the east and warm advection from the Middle East in the south [10]. The interactions between atmospheric dust, weather patterns and climate in the Caucasus region and Georgia in particular were studied in [5][6][7][8][9]13]. At present, computer simulations are actively used to study these interactions over the territory of Georgia [14].…”

Section: Meteorological Conditionsmentioning

confidence: 99%

Modelling transportation of desert dust to the South Caucasus using WRF Chem model

Davitashvili

2019

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

The problem of the ongoing climate change resulting from natural and growing anthropogenic factors acquires a particular importance for the territory of the Caucasus. Dust aerosol represent one of the main pollutants on the territory of Georgia and impact on regional climate. In this study, the WRF Chemistry model with dust module is used to study transportation of dust to the territory of the South Caucasus from the Sahara and Sahel in Africa, Arabian and ar-Rub’ al-Khali deserts located in the Middle East, Kyzylkum, Karakum in the Central Asia. The results of calculations have shown the WRF model was able to simulate dust aerosols transportation to the Caucasus reliably in conditions of the complex topography and that dust aerosol is an important factor in the climate system of the South Caucasus.

show abstract

Effect of Dust Aerosols in Forming the Regional Climate of Georgia

Cited by 6 publications

References 43 publications

Assessment of Recent Changes in Dust over South Asia Using RegCM

Assessment of Recent Changes in Dust over South Asia Using RegCM

Using modern technology to protect vineyards from hail amid climate change

Modelling transportation of desert dust to the South Caucasus using WRF Chem model

Contact Info

Product

Resources

About