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Dr. Victor Ongoma

Victor Ongoma

School of Geography, Earth Science and Environment
University of the South Pacific
Private Bag, Suva
679 Suva


  ECN Member

Expertise & Interests

Overview / specialty        Climatology
Climate Change
Official functions (outside of PAGES)        Teaching and Research
PAGES interests        ECN
Topics        Climate dynamics, Extreme events, Floods, Interannual-decadal varaibility, Warmer Worlds
Timescales        Anthropocene (last 100 years), Future projection, Observational period
Regions        Africa, Global, Pacific Ocean, Tropics
Sector        Academia / Education, Outreach/Communication, Research
Discipline        Meteorology, (Paleo)climatology, Statistics
Computers        Analyseries, ArcGIS, Matlab



1) Rigden AJ, Ongoma V, Huybers (2020) Kenyan tea is made with heat and water: how will climate change influence its yield? Environmental Research Letters. https://doi.org/10.1088/1748-9326/ab70be
2) Ayugi BO, Tan G, Gnitou GT, Ojara MA, Ongoma V (2020) Historical evaluations and simulations of precipitation over East Africa from Rossby Centre Regional Climate Model. Atmospheric Research 232, 104705. https://doi.org/10.1016/j.atmosres.2019.104705
3) Nyongesa A, Zeng G, Ongoma V (2020) Non-Homogeneous Hidden Markov Model for Statistical Downscaling of Short Rains Occurrence in Kenya. Theoretical and Applied Climatology 139(3–4) 1333–1347. http://dx.doi.org/10.1007/s00704-019-03016-2
4) Shilenje ZW, Ongoma V, Njagi M (2019) Applicability of Combined Drought Index in Drought Analysis over North Eastern Kenya. Natural Hazards 99(1): 379–389. https://doi.org/10.1007/s11069-019-03745-7.
5) Esayas B, Simane B, Teferi E, Ongoma V, Tefera N (2019) Climate Variability and Farmers’ Perception in Southern Ethiopia. Advances in Meteorology, ID 7341465. https://doi.org/10.1155/2019/7341465
6) Polong F, Chen H, Sun S, Ongoma V (2019) Temporal and Spatial Evolution of the Standard Precipitation Evapotranspiration Index (SPEI) in the Tana River Basin, Kenya. Theoretical and Applied Climatology 138(1-2): 777–792. https://doi.org/10.1007/s00704-019-02858-0
7) Getachew D, Ogwang BA, Ongoma V, ARM Towfiqul I (2019) The effect of Indian Ocean on Ethiopian Seasonal Rainfall. Meteorology and Atmospheric Physics 131: 1753–1761. https://doi.org/10.1007/s00703-019-00667-8
8) Ayugi B, Tan G, Ullah W, Boiyo R, Ongoma V (2019) Inter-comparison of remotely sensed precipitation datasets over Kenya during 1998-2016. Atmospheric Research 225: 96–109. https://doi.org/10.1016/j.atmosres.2019.03.032
9) Rahman MA, Yunsheng L, Sultana N, Ongoma V (2019) Analysis of reference evapotranspiration (ET0) trends under climate change in Bangladesh using observed and CMIP5 datasets. Meteorology and Atmospheric Physics 131(3): 639–655. https://doi.org/10.1007/s00703-018-0596-3
10) Ongoma V, Chen H, Gao C (2019) Evaluation of CMIP5 twentieth century rainfall simulation over the equatorial East Africa. Theoretical and Applied Climatology 135(3-4): 893–910. http://doi.org/10.1007/s00704-018-2392-x
11) Esayas B, Simane B, Teferi E, Tefera N, Ongoma V, Tefera N (2018) Trends in Extreme Climate Events over three Agro-Ecological Zones over Southern Ethiopia. Advances in Meteorology 2018, ID 7354157. https://doi.org/10.1155/2018/7354157
12) Ayugi BO, Tan G, Ongoma V, Mafuru KB (2018) Circulations Associated with Trends of Boreal Spring Rainfall over Kenya. Earth Systems and Environment 2(2): 421–434. https://doi.org/10.1007/s41748-018-0074-6
13) Ongoma V, Chen H, Gao C, Sagero PO (2018) Variability of temperature properties over Kenya based on observed and reanalyzed datasets. Theoretical and Applied Climatology 133(3): 1175-1190. http://doi.org/10.1007/s00704-017-2246-y
14) Ongoma V, Chen H, Gao C (2018) Projected Change in Mean Rainfall and Temperature over East Africa based on CMIP5 Models. International Journal of Climatology 38(3): 1375–1392. http://doi.org/10.1002/joc.5252
15) Gao C, Chen H, Sun S, Xu B, Ongoma V, Zhu S, Ma H, Li X (2018) Regional features and seasonality of land-atmosphere coupling over eastern China. Advances in Atmospheric Sciences 35(6): 689–701. http://doi.org/1007/s00376-017-7140-0
16) Gao C, Chen H, Sun S, Ongoma V, Hua W, Ma H, Xu B, Li Y (2018) A potential predictor of multi-season droughts in Southwest China: Soil moisture and its memory. Natural Hazards 91(2): 553–566. https://doi.org/10.1007/s11069-017-3140-8
17) Ongoma V, Chen H, Omony GW (2018) Variability of Extreme Weather Events over East Africa, a case study of Rainfall in Kenya and Uganda. Theoretical and Applied Climatology 131(1-2): 295–308. http://doi.org/10.1007/s00704-016-1973-9
18) Ongoma V, Chen H, Gao C, Nyongesa AM, Polong F (2018) Future changes in Climate extreme over Equatorial East Africa based on CMIP5 multimodel ensemble. Natural Hazards 90: 901–920. http://doi.org/10.1007/s11069-017-3079-9
19) Ongoma V (2017) Socio-Economic and Environmental Analysis of Wind Power Projects as Viable Renewable Energy Resources in Kenya. African Journal of Science, Technology, Innovation and Development 10(5): 525–538. http://dx.doi.org/10.1080/20421338.2017.1366132
20) Ngarukiyimana JP, Fu Y, Yang Y-J, Ogwang BA, Ongoma V, Ntwali D (2017) Dominant atmospheric circulation patterns associated with abnormal Rainfall events over Rwanda, East Africa. International Journal of Climatology 38(1):187–202. http://doi.org/10.1002/joc.5169
21) Ongoma V, Chen H (2017) Temporal and spatial variability of temperature and precipitation over East Africa from 1951 to 2010. Meteorology and Atmospheric Physics 129(2):131–144. http://doi.org/10.1007/s00703-016-0462-0
22) Shilenje ZW, Thiong’o K, Ongoma V, Philip SO, Nguru P, Ondimu K (2016) Roadside Air Pollutants along selected Roads in Nairobi City, Kenya. Journal of Geology and Geophysics 5:5. http://doi.org/10.4172/2381-8719.1000253
23) Ogwang BA, Nimusiima A, Tindamanyire T, Serwanga MN, Ayesiga G, Ojara M, Ssebabi F, Gugwa G, Nsubuga Y, Atim R, Kibwika R, Balikudembe JK, Kikonyogo H, Kalema A, Ongoma V, Taire A, Kiryhabwe A, Kituua M, Semujju M, Einyu F, Aribo L, Kituusa R (2016) Characteristics and changes in SON rainfall over Uganda (1901-2013). Journal of Environmental and Agricultural Sciences 8: 45–53.
24) Ongoma V, Shilenje ZW (2016) The Effectiveness of Agrometeorological Information in the realization of Kenya’s Vision 2030; Lessons learnt from China. Italian Journal of Agrometeorology 21(1): 67–72.
25) Sagero PO, Shisanya C, Ongoma V, Shilenje ZW (2016) Numerical simulation of Weather over Kenya using Weather Research and Forecasting-Environmental Modelling System (WRF-EMS). Geographica Pannonica 20(2): 51–61
26) Ogwang BA, Ongoma V, Gitau W (2016) Contributions of Atlantic Ocean to June - August Rainfall over Uganda and Western Kenya. Journal of Earth Space Physics 41(4): 131–140. https://dx.doi.org/10.22059/jesphys.2015.53833
27) Kpaikpai B, Ogwang BA, Sein ZMM, Ogou FK, Ongoma V, Ngarukiyimana JP (2016) Investigation of the Atmospheric Circulation Anomalies associated with Extreme Rainfall events over the Coastal West Africa. Journal of Earth Space Physics 41(4): 141–149. https://dx.doi.org/10.22059/jesphys.2015.55173
28) Ongoma V, Muange PK, Shilenje ZW (2016) Potential Effects of Urbanization on Urban Thermal Comfort, A case study of Nairobi City, Kenya: A Review. Geographica Pannonica 20(1): 19–31.
29) Ntwali D, Ogwang BA, Ongoma V (2016) The Impacts of Topography on Spatial and Temporal Rainfall Distribution over Rwanda Based on WRF Model. Atmospheric and Climate Sciences 6(2): 145–157. http://doi.org/10.4236/acs.2016.62013
30) Ngarukiyimana JP, Tan G, Ongoma V, Ogwang BA, Vuguziga F (2016) Application of Z-Index to March-May Seasonal Drought analysis over Rwanda. Romanian Journal of Meteorology 13(1-2): 1–16
31) Ogou FK, Batebana K, Ogwang BA, Sein ZMM, Ongoma V, Ngarukiyimana JP (2016) Investigation of the Influence of Atlantic Ocean on Rainfall Variability over Benin. Ethiopian Journal of Environmental Studies and Management 9(1): 70–79. http://dx.doi.org/10.4314/ejesm.v9i1.7
32) Libanda B, Ogwang BA, Ongoma V, Ngonga C, Nyasa L (2016) Diagnosis of the 2010 DJF flood over Zambia. Natural Hazards 81(1): 189–201. https://doi.org/10.1007/s11069-015-2069-z
33) Shilenje ZW, Murage P, Ongoma V (2015) Estimation of Potential Evaporation based on Penman Equation under varying Climate for Murang’a County, Kenya. Pakistan Journal of Meteorology 23: 33–42.
34) Mugisha E, Ogwang BA, Ongoma V, Zhang G (2015) A Secured Automatic Notification System Based on Short Message Service. International Journal for Information Security Research 5(1): 546–550. DOI: 10.20533/ijisr.2042.4639.2015.0062
35) Ongoma V, Otieno AS, Onyango AO (2015) Investigation of the possible influence of Urbanization on Rainfall Variability over Nairobi City, Kenya. Momona Ethiopian Journal of Sciences 7(2): 222–239. http://dx.doi.org/10.4314/mejs.v7i2.6
36) Oundo KA, Ongoma V (2015) Fog and Low Level Stratus Forecasting using Satellite Products; A Case Study of Jomo Kenyatta International Airport, Kenya. Pakistan Journal of Meteorology 11(22): 49–56
37) Ongoma V, Tan G, Ogwang BA, Ngarukiyimana JP (2015) Diagnosis of Seasonal Rainfall Variability over East Africa: A case study of 2010-2011 Drought over Kenya. Pakistan Journal of Meteorology 11(22): 13–21
38) Otieno AS, Wamalwa BM, Owuor NO, Ottieno JAM, Ongoma V (2015) The Role of Agri-business Incentive on Under-five Child Immunization in Trans-Nzoia County. East Africa Journal of Public Health 12(2): 1054–1059
39) Kpaikpai B, Ogwang BA, Sein ZMM, Ogou FK, Ongoma V, Ngarukiyimana JP (2015) Rainfall Characteristics over Togo and their related Atmospheric circulation Anomalies. Journal of Environmental and Agricultural Sciences 5: 34–48.
40) Onyango AO, Ongoma V (2015) Estimation of Mean Monthly Global Solar Radiation using Clear Sky Solar Radiation and Sunshine Hour for Nairobi City, Kenya. Journal of Renewable and Sustainable Energy 7: 053105(2015); http://dx.doi.org/10.1063/1.4930530
41) Otieno AS, Wamalwa BM, Owuor NO, Ottieno JAM, Ongoma V (2015) Comparison of Least Absolute Shrinkage and Selection Operator and Maximum Likelihood Estimators to Establish Determinants of Immunization in Trans-Nzoia County. Journal of Social Economics and Statistics 4(1): 29–45.
42) Shilenje ZW, Thiong’o K, Ondimu KI, Nguru P, Nguyo JK, Ongoma V, Mukola J, Ogwang BA, Tirok C (2015) Ambient Air Quality Monitoring and Audit over Athi River Township, Kenya. International Journal of Scientific Research in Environmental Sciences 3(8): 0291–0301. http://dx.doi.org/10.12983/ijsres-2015-p0291-0301
43) Shilenje ZW, Ongoma V, Ogwang BA (2015) Relationship between the North Atlantic Oscillation Index and October-December Rainfall Variability over Kenya. Journal of Geology and Geosciences 4(3): 207. http://dx.doi.org/10.4172/2329-6755.1000207
44) Ogwang BA, Ongoma V, Li X, Ogou FK (2015) Influence of Mascarene High and Indian Ocean Dipole on East African Extreme Weather Events. Geographica Pannonica 19(2): 64–72.
45) Sein ZMM, Ogwang BA, Ongoma V, Ogou FK, Batebana K (2015) Inter-annual variability of May - October rainfall over Myanmar in relation to IOD and ENSO. Journal of Environmental and Agricultural Sciences 4: 28–36.
46) Ogwang BA, Chen H, Tan G, Ongoma V, Ntwali D (2015) Diagnosis of East African Climate and the Circulation Mechanisms Associated with Extreme Wet and Dry Events: A study based on RegCM4. Arabian Journal of Geosciences 8(12): 10255–10265. http://doi.org/10.1007/s12517-015-1949-6
47) Islam-Towfiq ARM, Sein ZMM, Ongoma V, Islam-Saidul M, Alam-Foysal M, Ahmed F (2015) Geomorphological and land use mapping: A case study of Ishwardi under Pabna district, Bangladesh. Advances in Research 4(6): 378–387. http://doi.org/10.9734/AIR/2015/14149
48) Shilenje ZW, Ongoma V, Ogwang BA (2015) Upper Tropospheric and Stratospheric Ozone over Equatorial East Africa; Case study of Nairobi County, Kenya. Ethiopian Journal of Environmental Studies and Management 8(3): 290–300. http://dx.doi.org/10.4314/ejesm.v8i3.6
49) Ongoma V, Otieno G, Onyango AO (2014) An investigation of the transport and dispersion of atmospheric pollutants over Nairobi City. Journal of Environmental and Agricultural Sciences 1:10.
50) Otieno GL, Opijah FJ, Mutemi JN, Ogallo LA, Anyah RO, Ongoma V, Sabiiti G (2014) Seasonal rainfall forecasting using the Multi-Model Ensemble Technique over the Greater Horn of Africa. International Journal of Physical Sciences 2(6): 095–104.
51) Shilenje ZW, Ongoma V (2014) Observed Surface Ozone Trend in the Year 2012 over Nairobi, Kenya. Atmosfera 27(4): 377–384. http://doi.org/10.1016/S0187-6236(14)70036-0
52) Ongoma V, Muthama JN (2014) A Review and Assessment of Applicability of the Heat Stress Indices in Kenyan Weather Forecast. Open Journal of Atmospheric Climate Change 1(1): 17–22.
53) Ngaina JN, Muthama JN, Opere AO, Ininda JM, Ng’etich CK, Ongoma V, Mutai BK (2014) Potential of harvesting atmospheric water over urban cities in Kenya. International Journal of Physical Sciences 2(5): 69–75.
54) Ongoma V, Onyango AO (2014) A Review of the Future of Tourism in Coastal Kenya; The Challenges and Opportunities posed by Climate Change. Journal of Earth Science and Climate Change 5: 210. http://doi.org/10.4172/2157-7617.1000210
55) Ongoma V (2013) A review on the Effects of Climate Change on occurrence of Aflatoxin and its impacts on Food Security in Semi-Arid Areas of Kenya. International Journal of Agricultural Science and Research 2(11): 307–311.
56) Ongoma V, Muthama JN, Gitau W (2013) Evaluation of Urbanization Influences on Urban Winds of Kenyan Cities. Ethiopian Journal of Environmental Studies and Management 6(3): 223–231. http://dx.doi.org/10.4314/ejesm.v6i3.1
57) Ongoma V, Muthama JN, Gitau W (2013) Evaluation of Urbanization Influences on Urban Temperature of Kenyan Cities. Global Meteorology 2(e1). http://dx.doi.org/10.4081/gm.2013.e1
58) Ongoma V, Muthama JN, Ng’ang’a JK (2010) Effects of urbanization on the Climate of Nairobi City. Journal of Meteorology and Related Sciences 4: 49–60.