NOAA Research has collected the change in global surface temperature from land and ocean surface . From 1884 to 2015, the global temperature has raised significantly milestone of 1° Celsius above the pre-industrial era. The record heats for 2015 are enforced by El Nino and human-induced global warming.
Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850. The period from 1983 to 2012 was likely the warmest 30-year period of the last 1400 years in the Northern Hemisphere, where such assessment is possible (see IPCC synthesis report)
From 2011 to 2015, the global temperature had spiked the warmest on record. This is due to levels of greenhouse gases in the atmosphere reached new highs and in the Northern hemisphere spring 2015 the three-month global average concentration of CO2 crossed the 400 parts per million barrier for the first time (See explanation in Carbon Dioxide). Thus, 2015 is to be the hottest year on the NOAA record , which measures from ocean surface temperatures at the highest level since records began(WMO).
The green line shows annually global average land-ocean temperature that is more fluctuated than the orange line. It shows 5-years global average land-ocean temperature that can be seen obviously rise in temperature and its effect is direct to all mankind. (Link to Future Risks & Impacts)
Temperature rise compared in 1884, 1950, 2000 and 2105
The figure above shows the global temperature rise from 1884 and 1950, that can be seen in blue area referred to low temperature, to 2000 and 2015 that can be seen the red area the refers to higher temperature.