Muhammad Mubashar Ahmad Dogar

Hokkaido University, Faculty of Environmental Earth Science, Post-Doc

Global Change Impact Studies Centre (GCISC), Climatology, Graduate Student

King AbdulAziz University (KAU) Jeddah, Saudi Arabia, Faculty of Meteorology, Alumnus

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Mr. Dogar has done B.Sc & M.Sc in Physic from GC University Lahore, Pakistan. He has completed his Ph.D. degree in the field of Climate Modeling from Hokkaido University, Japan and received a highly prestigious RONPAKU Gold Medal Award from the Japan Society for the Promotion of Science (JSPS) for conducting outstanding research. He has been among the vibrant and intellectual students at GC University, Lahore. Currently, he is doing research in the field of Earth Science (Atmosphere/Ocean Science) at the Department of Earth Science & Engineering (ErSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. Before joining KAUST, Mr. Dogar worked as a Scientific Officer at the Global Change Impact Studies Centre (GCISC), Ministry of Climate Change (MoCC), Islamabad Pakistan. He has also worked as a Research Assistant at the Centre of Excellence in Climate Change Research (CECCR), King Abdulaziz University (KAU), Jeddah, Saudi Arabia.
In pursuit of his study, he has participated at the international level in many top institutes in the world including Hokkaido University Japan, International Center for Theoretical Physics (ICTP), Italy, European Geosciences Union, Austria, American Geophysical Union, San Francisco, USA, New York University (NYU), Abu Dhabi, and King Abdulaziz University (KAU) Jeddah, Saudi Arabia.
His interest includes the study of Earth System Physics including volcanic and nuclear aerosols and their Climatic Impacts. He uses one of the world's best supercomputers (Shaheen) to conduct his experiments with Earth System coupled Models. He has presented his research work on "Radiative Forcing Impacts of Large Explosive Volcanic Eruptions over the Middle East & African Region" at EGU, Austria, and at International Center for Theoretical Physics (ICTP), Trieste, Italy.
Address: Building 1, level 2, Earth Science and Engineering Department, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.

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Papers by Muhammad Mubashar Ahmad Dogar

Revisiting the Climatic Impacts of Strong and Weak ENSO using High-Resolution Atmospheric Model

To evaluate the performance of a high-resolution atmospheric model (HiRAM) and to improve our und... more To evaluate the performance of a high-resolution atmospheric model (HiRAM) and to improve our understanding of the climatic impacts of ENSO teleconnection, we analyzed AMIP style HiRAM simulations conducted eﬀectively at 25 km grid spacing. To better assess HiRAM response to ENSO teleconnection; we categorized it into strong and weak El Ni˜no/La Ni˜na episodes. HiRAM model reproduced the impacts of strong ENSO over global scale very well, however, it underestimated ENSO teleconnection patterns and associated changes over regional scale (e.g., MENA and South Asia), especially following weak ENSO that could be attributed to model weak response to circulation changes such as Paciﬁc North American (PNA) and North Atlantic Oscillation (NAO). Moreover, our results emphasize that ENSO impacts are relatively stronger over the Inter-Tropical Convergence Zone (ITCZ) compared to extra-tropics and high-latitude regions. The positive phase of ENSO causes a weakening in rainfall over the African ...

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Study of the regional climatic impacts of tropical explosive volcanism in the Middle East and North Africa region

Title Study of the regional climatic impacts of tropical explosive volcanism in the Middle East a... more Title Study of the regional climatic impacts of tropical explosive volcanism in the Middle East and North Africa region [an abstract of dissertation and a summary of dissertation review] Author(s) Muhammad Mubashar Ahmad Dogar Citation 北海道大学. 博士(環境科学) 乙第7091号 Issue Date 2020-03-25 Doc URL http://hdl.handle.net/2115/78552 Rights(URL) https://creativecommons.org/licenses/by/4.0/ Type theses (doctoral abstract and summary of review) Additional Information There are other files related to this item in HUSCAP. Check the above URL. File Information Muhammad_Dogar_abstract.pdf (論文内容の要旨)

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The mechanism of EAP-EU combined impact on summer rainfall over North Asia

Theoretical and Applied Climatology

This article uses wave activity flux and sea surface temperature (SST) to explore the mechanism o... more This article uses wave activity flux and sea surface temperature (SST) to explore the mechanism of EAP-EU combined impact on summer rainfall in North Asia (NA). EAP and EU teleconnections can be divided into four categories of configuration according to their anomaly phase features. The category I (II) configurations cause rainfall in the Urals and the Okhotsk Sea and the region from Northeast China to Japan being less (more), the Lake Baikal to the Okhotsk Sea being more (less), which leads to the summer rainfall in NA mainly presenting the “− + −” (“+ − +”) a tripole wavelike structure. Category I (II) configurations also show the West-East reverse anomalies of summer rainfall in northern NA and the North-South opposite anomalies in eastern NA. The EAP and EU teleconnections have an obvious correlation with the ENSO-like pattern of SST anomalies over the tropical Pacific. When warm ENSO is in the development phase, it is conducive to stimulate Rossby waves propagating eastward from the North Atlantic Ocean via the PNA teleconnection, forming the EU teleconnection across the Eurasia continent. Meanwhile, the warm summer SSTA anomalies over tropical east Pacific and IMC are conducive to the local thermal convective over Indo-Pacific warm pool and motivate the EAP teleconnection, propagating northward to mid-high latitude region. EAP and the EU teleconnections overlapped with each other, form the tripole atmospheric structure in NA, and produce relevant rainfall anomaly patterns. For the category IV of EAP-EU configuration, the warm SST anomalies in the equatorial region gradually weaken from previous winter to summer. Weak tropical east Pacific SST anomalies are conducive to excite the EU teleconnection with different wave train features against the category II, presenting a strong positive anomaly center over the Ural mountain and Baikal lake. This positive center connected with the EAP caused positive anomalies over FER resulting in the dipole pattern of atmospheric and rainfall anomalies in the summer season. The condition is opposite for the category III (I) configuration against that of category IV (II). It is also found that the influence on EAP-EU configuration caused by ENSO-like pattern of SST anomalies over the tropical Pacific has an obvious asymmetric feature that category II (I) configuration relevant SST forcing is much significant than that of category IV(III) configuration.

Limitations of BCC_CSM's ability to predict summer precipitation over East Asia and the Northwestern Pacific

Atmospheric Research

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Revisiting the strong and weak ENSO teleconnection impacts using a high-resolution atmospheric model

Atmospheric Environment

The Sensitivity of DTR to the Increased CO2 over Mid-latitude Semi-dry Regions

JOJ Hortic Arboric, 2019

The rationale for this study lies in the fact that the mid-latitude regions are largely affected ... more The rationale for this study lies in the fact that the mid-latitude regions are largely affected by the global and regional scale circulation changes. Moreover, earlier studies emphasize that the variation in atmospheric concentration of heat-trapping gases, cloud amount and moisture contents produce substantial regional climatic changes. Therefore, it is of significant practical importance to analyze the sensitivity of mid-latitude regions to anthropogenic forcing, especially, the CO2 radiative forcing. This study assesses the role of CO2 radiative forcing in causing asymmetric diurnal changes over the mid-latitude semi-dry region using an idealized experiment conducted by single column (1-D) Radiative-Convective Model (RCM) of the diurnal cycle. The model is capable enough in highlighting the main features responsible for the observed diurnal asymmetry in the ground temperature. A significant decrease in the Diurnal Temperature Range (DTR) is observed in this region under doubled CO2 forcing. The amount of thermal radiation trapped by CO2 forcing in the presence of water vapors plays a key role in surface temperature changes and resultant decreasing of the DTR. It is further found that CO2 induced climatic feedbacks are equally important in producing diurnal asymmetry. To better understand the complete picture of the DTR variability, one needs to explore all the possible forcing and feedbacks such as caused by aerosols, water vapors and cloud amount along with their distribution in the atmosphere.

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Revisiting the Climatic Impacts of Strong and Weak ENSO using High-Resolution Atmospheric Model

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Study of the regional climatic impacts of tropical explosive volcanism in the Middle East and North Africa region

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The mechanism of EAP-EU combined impact on summer rainfall over North Asia

Theoretical and Applied Climatology