Effect of temperature on sea water surface increment in North Sumatera Indonesia

Abstract

Rule of Indonesian Republic No. 64, 2010 is about disaster mitigation in coastal area and small island. It requires data of temperature and sea water surface increment. This paper focuses on the ambient temperature and rate of temperature increment and sea water surface increment in Province of North Sumatera, Indonesia for the year of 2015. This research location is in East and West coastal area, Sumatera and coastal Nias island. The method of sea water surface increment measurement is using the photo image “coastal area susceptibility index” for the year of 2008. The research data is presented in table, graph and narration. The results show that the highest temperature in East coastal area, West coastal area and coastal Nias island are 31.8 0C, 32.2 0C and 32.2 0C, respectively with province average temperature is 27.36 0C. The rates of average temperature increment are 0.54%, 1.87 % and 3.66% for each area. The rates of maximum temperature increment are 0.25%, 1.89% and 11.3% for each area. The rates of sea water surface increment are 0.395%, 1.88% and 7.48% for each area. The sea water surface increments in 2008 and 2015 are 5-14 mm/year and 14.4-101.76 mm/year, respectively. The highest rate of sea water surface increment in coastal Nias island is 848%. Based on the data shows that a disaster mitigation in coastal Nias island is urgently required.