Browsing NORCE vitenarkiv by Author "Parker, Douglas John"
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Beyond the regional average: Drivers of geographical rainfall variability during East Africa's short rains
Kolstad, Erik Wilhelm; Parker, Douglas John; MacLeod, David A.; Wainwright, Caroline M.; Hirons, Linda C. (Peer reviewed; Journal article, 2024)The East African “short rains” from October–December (OND) are crucial for the region's cultural and agricultural landscape. Traditional climate studies have often treated these rains as a single mode, representing the ... -
Effects of the Congo Basin Rainforest on Rainfall Patterns
Barimalala, Rondrotiana; Kolstad, Erik Wilhelm; Parker, Douglas John; Williams, D. Aled (Research report, 2023)Large-scale deforestation in the Congo Basin has an impact on rainfall patterns, both in the Basin and beyond. Factors like socio-economic drivers contribute to ongoing deforestation, and forest loss rates are expected to ... -
Effects on early monsoon rainfall in West Africa due to recent deforestation in a convection-permitting ensemble
Crook, Julia; Klein, Cornelia; Folwell, Sonja; Taylor, Christopher M.; Parker, Douglas John; Bamba, Adama; Kouadio, Kouakou (Peer reviewed; Journal article, 2023)Tropical deforestation can have a significant effect on climate, but research attention has been directed mostly towards Amazonian deforestation. The southern part of West Africa (a region dependent on rain-fed agriculture ... -
Nowcasting tracks of severe convective storms in West Africa from observations of land surface state
Taylor, Christopher M; Klein, Cornelia; Dione, Cheikh; Parker, Douglas John; Marsham, John; Abdoulahat Diop, Cheikh; Fletcher, Jennifer; Saidou Chaibou, Abdoul Aziz; Nafissa, Dignon Bertin; Semeena, Valiyaveetil Shamsudheen; Cole, Steven J; Anderson, Seonaid R (Peer reviewed; Journal article, 2022)In tropical convective climates, where numerical weather prediction of rainfall has high uncertainty, nowcasting provides essential alerts of extreme events several hours ahead. In principle, short-term prediction of intense ... -
Synoptic-scale and mesoscale controls for tornadogenesis on cold fronts: Shear-zone vortex-genesis in a developing frontal wave
Clark, Matthew R; Parker, Douglas John; Hanley, Kirsty E (Peer reviewed; Journal article, 2021)High-resolution model simulations and radar observations are used to investigate the onset of vortex-genesis in a tornadic narrow cold-frontal rain band (NCFR). The timing and location of vortex-genesis was strongly ... -
Tropical Africa's First Testbed for High-Impact Weather Forecasting and Nowcasting
Parker, Douglas John; Fletcher, Joyce; Diop, Cheikh Anta; Adefisan, Elijah Adesanya; Ahiataku, Maureen; Ansah, Samuel Owusu; Birch, Cathryn E.; Burns, Helen L.; Clarke, S.J.; Gacheru, James; James, Tony D.; Tuikong, C.K. Ngetich; Koros, D.; Indasi, V.S.; Lamptey, B.L.; Lawal, Kamoru Abiodun; Roberts, Alexander; Stein, Thorwald; Visman, Emma; Woodhams, Barry J.; Youds, Lorraine H.; Ajayi, V.O.; Bosire, E.N.; Cafaro, Carlo; Camara, Cheick Amadou Tidiani; Chanzu, Benard; Dione, Cheikh; Gitau, Wilfred; Groves, Denise; Groves, James; Hill, Peter G.; Ishiyaku, Ibrahim; Klein, Cornelia; Marsham, John H.; Mutai, Bethwel Kipkoech; Ndiaye, Papa Ngor; Osei, M.; Popoola, Temidayo Israel; Talib, Joshua; Taylor, Christopher M; Walker, Dan (Peer reviewed; Journal article, 2022)Testbeds have become integral to advancing the transfer of knowledge and capabilities from research to operational weather forecasting in many parts of the world. The first high-impact weather testbed in tropical Africa ... -
Upper-level midlatitude troughs in boreal winter have an amplified low-latitude linkage over Africa
Ward, Neil; Fink, Andreas H.; Keane, Richard J.; Parker, Douglas John (Peer reviewed; Journal article, 2022)In boreal winter, strong upper-level midlatitude troughs across the Atlantic–Africa–southwestern Asia sector generate substantial tropical–extratropical interaction and have become recognized as important factors in some ... -
Wind Shear Effects in Convection–Permitting Models Influence MCS Rainfall and Forcing of Tropical Circulation
Maybee, Ben; Marsham, John H.; Klein, Cornelia M.; Parker, Douglas John; Barton, Emma J.; Taylor, Christopher M.; Lewis, Huw; Sanchez, Claudio; Jones, Richard W.; Warner, James (Peer reviewed; Journal article, 2024)Mesoscale Convective Systems (MCSs) play a critical role in tropical rainfall patterns and circulations. To reduce persistent biases and improve understanding of the climate system, international groups have called for ...