Evaluation of Geopotential Height at 500 hpa with Rainfall Events: A Case Study of Iraq
Keywords:500hpa, geopotential height , rainfall, trough, Iraq
The geopotential height at 500 hPa is a key factor in determining the weather and climate conditions around the world. This paper aims to study the effect of 500hpa geopotential height in Iraq weather from a synoptic perspective and evaluation the variation at 500hpa geopotential height. On (26-29 January 2013), a case of atmospheric instability affected Iraq, where a heavy amount of rain fell over Iraq on 28 January 2013, the amount of rain that fell on Kirkuk was about (72.2mm). The result showed that when the upper-level trough stretches from Europe towards the Mediterranean, it will enhance surface low pressure. In addition, the advection of moisture from lower latitudes resulted in a situation of instability that brought severe rain to Iraq. during this period the value of geopotential height decreased sharply. The decrease in the value of geopotential height is an indicator of turbulent weather when compared to surrounding regions.
O. M. A. M. Agha and N. Şarlak, "Spatial and temporal patterns of climate variables in Iraq," Arab. J. Geosci., vol. 9, no. 4, 2016.
A. A. Attiya and B. G. Jones, "Climatology of Iraqi dust events during 1980-2015," SN Appl. Sci., vol. 2, no. 5, May 2020.
N. Al-Ansari, A. A. Ali, and S. Knutsson, "Present Conditions and Future Challenges of Water Resources Problems in Iraq," J. Water Resour. Prot., vol. 06, no. 12, pp. 1066-1098, 2014.
S. A. Salman, S. Shahid, T. Ismail, K. Ahmed, E. S. Chung, and X. J. Wang, "Characteristics of Annual and Seasonal Trends of Rainfall and Temperature in Iraq," Asia-Pacific J. Atmos. Sci., vol. 55, no. 3, pp. 429-438, 2019.
A. S. Hassan, K. N. Zeki, and N. S. Salih, "Determination the quantity of extreme rainfall and calculation of the climatology mean for Baghdad City," Iraqi J. Sci., vol. 59, no. 1 B, pp. 447-455, 2018.
A. R. Al-Nassar and H. Kadhim, "Mapping Flash Floods in Iraq by Using GIS," Environ. Sci. Proc., vol. 8, no. 1, p. 39, Jul. 2021.
A. Hochman, D. Rostkier-Edelstein, P. Kunin, and J. G. Pinto, "Changes in the characteristics of 'wet' and 'dry' Red Sea Trough over the Eastern Mediterranean in CMIP5 climate projections," Theoretical and Applied Climatology, vol.143, no. 01, pp. 781-794, 2021.
H. Khozeymehnezhad and M. Nazeri Tahroudi, "Annual and seasonal distribution pattern of rainfall in Iran and neighboring regions," Arab. J. Geosci., vol. 12, no. 8, 2019.
K. M. R. Hunt and A. Menon, "The 2018 Kerala floods: a climate change perspective," Clim. Dyn., vol. 54, no. 3-4, pp. 2433-2446, Feb. 2020.
Y. Y. Hafez and M. Almazroui, "Recent Study of Anomaly of Global Annual Geopotential Height and Global Warming," Atmos. Clim. Sci., vol. 04, no. 03, pp. 347-357, 2014.
D. Q. Hmood Abd and A. K. Abdul kareem, "Synoptic Analysis for the Daily Rains of the City of Baghdad," Al-Mustansiriyah J. Sci., vol. 32, no. 2, p. 51-57,2021.
A. G. Mutar, A. Khtan, and L. E. George, "Synoptic Characteristics of Torrential Rains in Southwest and Southeast Iraq: A Case Study," Al-Mustansiriyah J. Sci., vol. 32, no. 3, p. 1-7,2021.
A. Raheem Al-Nassar, J. L. Pelegrí, P. Sangrà, and M. Alarcon, "Cut-off low systems over Iraq: contribution to annual precipitation and synoptic analysis of extreme events."vol. 40, no. 2, p. 908-926,2021.
S. Issa and J. Kadhum, "Dynamical Analysis of Severe Rain Events over Iraq," Al-Mustansiriyah J. Sci., vol. 30, no. 1, pp. 15-22, 2019.
A. M. Al-Lami, Y. K. Al-Timimi, and H. K. A. Al-Shamarti, "Spatiotemporal analysis of some extreme rainfall indices over Iraq (1981-2017)," Sci. Rev. Eng. Environ. Sci., vol. 30, no. 2, pp. 221-235, 2021.
A. Al-Salihi, A. Allami, and Y. Kadhim, "Spatiotemporal Analysis of Annual and Seasonal Rainfall Trends for Iraq," Al-Mustansiriyah J. Sci., vol. 25, no. 1, pp. 153-168, 2014.
S. A. Khidher and P. Pilesjö, "The effect of the North Atlantic Oscillation on the Iraqi climate 1982-2000," Theor. Appl. Climatol., vol. 122, no. 3-4, pp. 771-782, 2015.
K. M. R. Hunt, A. G. Turner, and R. K. H. Schiemann, "How Interactions between Tropical Depressions and Western Disturbances Affect Heavy Precipitation in South Asia,"vol. 149, no. 6, pp. 1801-1825, 2021.
M. Almazroui, S. Kamil, K. Ammar, K. Keay, and A. O. Alamoudi, "Climatology of the 500-hPa mediterranean storms associated with Saudi Arabia wet season precipitation," Clim. Dyn., vol. 47, no. 9, pp.3029-3042,2016.
L. Deng, M. F. Mccabe, G. Stenchikov, J. P. Evans, and P. A. Kucera, "Simulation of flash-flood-producing storm events in Saudi Arabia using the weather research and forecasting model," J. Hydrometeorol., vol. 16, no. 2, pp. 615-630, 2015.
Y. Ai and W. Qian, "Anomaly-based synoptic analysis on the Heavy Rain Event of July 2018 in Japan," Nat. Hazards, vol. 101, no. 3, pp. 651-668, 2020.
"Daily Climate Composites: NOAA Physical Sciences Laboratory." https://psl.noaa.gov/data/composites/day/ (accessed Jan. 27, 2022).
"ECMWF ERA Interim, Daily." https://apps.ecmwf.int/datasets/data/interim-full-daily/levtype=sfc/(accessed Mar. 21, 2022).
"WorldviewSnapshots." https://wvs.earthdata.nasa.gov/ (accessed Mar. 21, 2022).
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