World sees hottest July ever in 2019

July 2019 was the joint-hottest month on Earth (July 2016 was equally hot), according to the United Nations.

Due to the rise in global temperature, in 2019, the extent of sea ice in the polar regions has dropped well below the average levels seen in past three decades. This is expected to add to the increasing sea levels, which have been steadily rising in the recent years.

Off-target

According to the Paris Agreement 2015, the objective was to restrict global temperature rise to about 1°C in the first 30-year period, compared to the pre-industrial average. The target has been missed every year since then.

The graph shows global-average temperature for July relative to 1850-1900 average.


image/svg+xml

1.5 1.2 0.9 0.6 0.3 0 -0.3 1.5 1.2 0.9 0.6 0.3 0 -0.3 1880 1895 1910 1925 1940 1955 1970 1985 2000 2015

July 2019 was close to 1.2°C above the pre-industrial average

 

Accelarated meltdown

Both the Arctic and Antarctic sea ice extents dropped to their lowest at various points of time in 2019. The chart shows the change in sea ice extent in 2019 compared to 1979-2010 average.

image/svg+xml Arctic region sea ice extent (million square kilometers) Antarctic region sea ice extent (million square kilometers) 1.8 1.4 10 6 2 20 15 10 5 0

Jan Mar May Jul Sep Nov Dec Jan Mar May Jul Sep Nov Dec

2019 Lowest-ever levels in July Lowest-ever levels in January 2019 1979-2010 average 1979-2010 average

 

A sea change

Since 1993, global sea level has risen by an average of 3.3 mm per year. This increase is usually caused by water from melting ice sheets and glaciers and the expansion of sea water as it warms.

The graph shows the change in sea level since 1993 in mm.


image/svg+xml 80 60 40 20 0

1995 2000 2005 2010 2015 Change in sea level since 1993 in mm

Compared to 1993, the global sea level, as in April 2019, has increased by 94 mm approximately

 

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