Training worshop on sand dust storms in West
- Slides: 4
Training worshop on sand dust storms in West and Northern Africa Case study: dust haze over Niger from 02 to 04 february 2019 Ousman Baoua ousmanebaoua@yahoo. fr
The uplift of dust has started on the 1 st February 2017 over the region of Faya Largeau (Chad), the principal source of dust raised over the world. However, the H-24 RGB Microphysics satellite imagery on the 1 st February 2017 shown a relatively cleared sky over Niger, except over the extreme Northern Manga. A widespread dust haze was observed over Niger Republic on the 2 nd, 3 rd and 4 th February 2017. This present case study, illustrated the genesis of that situation by showing up the scientific explanations. The dust propagation, once uplifted over the Chad, having a trajectory East to West, the UKMet, ARPEGE models and also the Barcelona dust prediction centre have well predicted this dense suspension of dust over the Eastern part of Niger Republic (Diffa and Zinder) and also over the Northern regions (Bilma and Agadez), except over the Niger river’s areas. 9100 8100 7100 6100 5100 4100 3100 2100 100 VISI 0600 Z VISI 0900 Z ry bé ya lla Ti Ga o ss Do ey am ez Ni a Ag ad lm Bi ua ho ni Ta Ko n ad i ar ia ar ag M r de M Zin ur é Go né ai M ffa Di Gu igm i VISI 1800 Z N' Visiblité (m) Variation of horizontal visibility at 0600 Z, 0900 Z et 1800 Z over Niger synoptic stations, 2 nd february 2017
Variation of horizontal visibility at 0600 Z, 0900 Z et 1800 Z over Niger synoptic stations, 2 nd february 2017 Visiblity (m) 9100 8100 7100 6100 5100 4100 3100 2100 100 VISI 0600 Z VISI 0900 Z VISI 1800 Z N'Guigmi Diffa Mainé Gouré Zinder Magaria Maradi Konni Tahoua Bilma Agadez Niamey Dosso Gaya Tillabéry Visibility (m) Variation of horizontal visibility at 0600 Z, 0900 Z et 1800 Z over Niger synoptic stations, 3 rd february 2017 9100 8100 7100 6100 5100 4100 3100 2100 100 VISI 0600 Z VISI 0900 Z VISI 1800 Z N'Guigmi Diffa Mainé Gouré Zinder Magaria Maradi Konni Tahoua Bilma Agadez Niamey Dosso Gaya Tillabéry Visibilité (m) Variation of horizontal visibility at 0600 Z, 0900 Z et 1800 Z over Niger synoptic stations, 4 th february 2017 9100 8100 7100 6100 5100 4100 3100 2100 100 VISI 0600 Z VISI 0900 Z VISI 1800 Z N'Guigmi Diffa Mainé Gouré Zinder Magaria Maradi Konni Tahoua Bilma Agadez Niamey Dosso Gaya Tillabéry
