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Seasonal Variability of Gravity Wave Potential Energy Densities at Various Latitudes / Marwa Mohamed Abdelhameed Almowafy ; Supervised M. Magdy Abdelwahab , Elsayed Mohamed Robaa

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Marwa Mohamed Abdelhameed Almowafy , 2022Description: 165 P . : charts ; 25cmOther title:
  • التباين الموسمي لكثافة الطاقة الكامنة لموجة الجاذبية عند خطوط العرض المختلفة [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Astronomy, Meteorology Summary: In this study, we review the characteristics of the seasonal cycle of gravity waves between 2012 to 2020 at different latitudes using temperatures measured by lidar and satellite. We study the energy densities of gravity waves in three different latitudes: Andenes in Norway (69 N), K{u00A8}uhlungsborn in Germany ( 54 N), and Cairo in Egypt ( 30 N). For the first two locations, the data measured by both the lidar and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) satellite are used in addition to ERA-5 reanalysis data. To separate the temperature perturbations caused by gravity waves, a filter on vertical wavelength ( z < 15 km) and another filter on wave period ( < 8 h) were applied. From these temperature fluctuations, the Gravity Wave Potential Energy Density (GWPED) is calculated. The comparison between the lidar and the satellite temperature analysis showed that both regions show an apparent seasonal variability of GWPED with a maximum in winter and a minimum in summer. However, the amplitude of winter to summer variability differs from lidar to satellite. GWPED from reanalysis is smaller compared to lidar, and the difference increases with altitude in winter. All measured and reanalysis data confirmed the larger GWPED of K{u00A8}uhlungsborn over Andenes, but the exact reason for this is not yet evident
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.01.Ph.D.2022.Ma.S (Browse shelf(Opens below)) Not for loan 01010110085663000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.01.Ph.D.2022.Ma.S (Browse shelf(Opens below)) 85663.CD Not for loan 01020110085663000

Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Astronomy, Meteorology

In this study, we review the characteristics of the seasonal cycle of gravity waves between 2012 to 2020 at different latitudes using temperatures measured by lidar and satellite. We study the energy densities of gravity waves in three different latitudes: Andenes in Norway (69 N), K{u00A8}uhlungsborn in Germany ( 54 N), and Cairo in Egypt ( 30 N). For the first two locations, the data measured by both the lidar and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) satellite are used in addition to ERA-5 reanalysis data. To separate the temperature perturbations caused by gravity waves, a filter on vertical wavelength ( z < 15 km) and another filter on wave period ( < 8 h) were applied. From these temperature fluctuations, the Gravity Wave Potential Energy Density (GWPED) is calculated. The comparison between the lidar and the satellite temperature analysis showed that both regions show an apparent seasonal variability of GWPED with a maximum in winter and a minimum in summer. However, the amplitude of winter to summer variability differs from lidar to satellite. GWPED from reanalysis is smaller compared to lidar, and the difference increases with altitude in winter. All measured and reanalysis data confirmed the larger GWPED of K{u00A8}uhlungsborn over Andenes, but the exact reason for this is not yet evident

Issued also as CD

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