Abstract
Abstract. On 24 August 2015 intense rainfall episodes generated flash floods and landslides on the eastern Black Sea coast of Turkey. As a consequence of the heavy rainstorm activity over Artvin and its surroundings (NE Turkey), 11 people died and economic losses totaled a million dollars. Over the 6 h of the event (from 05:00 to 11:00 UTC), total accumulated rainfall amounts of 136, 64, and 109 mm were measured in the Hopa, Arhavi, and Borçka settlements of Artvin city, respectively. This study comprehensively investigates the meteorological characteristics of those flash floods. In terms of synoptic mechanisms, the cutoff surface low from the summer Asian monsoon settled over the eastern Black Sea. After two days of quasistationary conditions of this cyclone, sea surface temperatures (SSTs) reached 27.5 °C (1.5 °C higher than normal) and low-level moisture convergence developed. In addition, transfer of moisture by warm northerly flows from the Black Sea and relatively cool southerly flows from the land coasts of the Artvin district exacerbated the unstable conditions and thus played a significant role in the development of deep convective cells. Severe rainstorms as well as the slope instability of the region triggered landslides and worsened flood damages in the Artvin area. This study supports conventional weather analysis, satellite images, and forecast model output to alert forecasters to the potential for heavy rainfall.
Subject
General Earth and Planetary Sciences
Reference28 articles.
1. Alpert, P., Osetinsky, I., Ziv, B., and Shafir, H.: A new seasons definition based on classified daily synoptic systems: an example for the eastern Mediterranean, Int. J. Climatol., 24, 1013–1021, 2004.
2. Aronica, G. T., Brigandi, G., Marletta, C., and Manfre, B.: Hydrological and hydraulic analysis of the flash flood event on 25 October 2007 in North-Eastern part of Sicily, Italy, in: Proceedings of Floodrisk 2008, 30 September–2 October 2008, Oxford, UK, 2008.
3. Biyik, G., Unal, Y. S., and Onol, B.: Assessment of Precipitation Forecast Accuracy over Eastern Black Sea Region using WRF-ARW, European Geosciences Union General Assembly, Vienna, 2 May 2010–7 May 2010, 2010.
4. Borga, M., Boscolo, P., Zanon, F., and Sangati, M.: Hydrometeorological Analysis of the 29 August 2003 Flash Flood in the Eastern Italian Alps, J. Hydrometeorol., 8, 1049–1067, 2007.
5. Bozkurt, D. and Sen, O. L.: Precipitation in the Anatolian Peninsula: sensitivity to increased SSTs in the surrounding seas, Clim. Dynam., 36, 711–726, 2011.
Cited by
19 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献