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





 

Source: Read Full Article