630 Spatio-Temporal Analysis of Air Temperature over Northwestern Nigeria: A Climate Change Perspective

Wednesday, 13 January 2016
Hall D/E ( New Orleans Ernest N. Morial Convention Center)
Bernard Tarza Tyubee, Benue State Univ., Makurdi, Nigeria; and D. O. Onyilo

The study analyzed spatio-temporal variation in air temperature in Northwestern Nigeria from 1971 to 2010 and predicts air temperature to 2030, 2060 and 2090. Daily minimum and maximum air temperature (C) data were collected from seven synoptic weather stations in the region from the Nigerian Meteorological Agency, Abuja. Air temperature data of 30 years (1970 to 1999) were also extracted from National Center for Atmospheric Research (NCAR) as well as Community Climate System Model (CCSM) projections from 1970 to 1999 and 2000 to 2099. The spatial variation of air temperature was investigated with the aid of isothermal maps, and the standardized anomaly and trend analysis were used to investigate the temporal variation in air temperature. The IPCC's A1 and A2 SRES marker scenarios were used to project air temperature to 2030, 2060 and 2090 respectively. The result showed that within a 40-year period (1971-2010), maximum temperature varied spatially from 31.3oC - 35.9oC while minimum temperature also varied spatially from 18.4 oC - 22.9 oC with warm core over Sokoto and Yelwa, and cool core over Zaria and Kaduna respectively. The 1990's and early 2000's were generally warmer compared to other decades. There is a generally increasing trend in both minimum and maximum temperature for the stations and the areally averaged region though only the trends of Zaria and Kaduna (minimum temperature) and Kaduna, Yelwa and Sokoto (maximum temperature) are significant at 95% confidence level. Based on the IPCCs A1 scenario, maximum temperature is projected to rise by 0.06-0.73C by 2030, 0.08-0.81C by 2060, and 0.09-0.85C by 2090 while minimum temperature is projected to rise by 0.10-0.36C by 2030, 0.13-0.35C by 2060, and 0.14-0.37C by 2090. Using the IPCCs A2 scenario, maximum temperature is projected to rise by 0.06-0.72C by 2030, 0.08-0.84C by 2060, and 0.11-1.00C by 2090 while minimum temperature is projected to rise by 0.10-0.37C by 2030, 0.13-0.38C by 2060, and 0.17-0.49C by 2090. The study concludes that desertification and land use/land cover change and desertification are the major drivers of temperature in the region.
- Indicates paper has been withdrawn from meeting
- Indicates an Award Winner