Where is Noah's Ark? We need it

"The sea is certainly common to all" - Plautus 

I have returned to normality from my master's application sabbatical to find UCL ranked 28th in the UK environmental university ranking! Only makes me prouder to study at such a well-rounded institution. In previous post's I explained the causes of sea level rise (SLR) and in this post, I thought I'd put global SLR into perspective.

Figure 1: Statue of Liberty going for a swimming  

Global mean SLR has increased from 2.2 +/- 0.3 mm yr^-1 to 3.3 +/- 0.3mm yr^-1 in 21 years, this increase has had profound effects worldwide. Some countries possess longer coastal lines than others and therefore the potential effects vary between regions.  In the following paragraphs, I will highlight the regional differences in SLR.

Figure 2: An interactive map displaying the length of every countries coastline

Europe

In Europe, approximately 19% of the entire population are estimated to live within 10km of a coastline and 75% of people in the Mediterranean live in coastal areas. By 2100, extreme SLR on European coastlines is projected to reach 57cm under Representative concentration pathways (RCP) 4.5 and 81 cm under RCP8.5. While mean SLR is expected to be 53cm and 77cm under the same pathways. The Black sea and the Atlantic are thought be worst hit, with towns such as Esbjerg in Denmark experiencing 106cm of SLR.

Figure 3: Absolute sea level rise across Europe between 1992-2014 - Source: European Environment Agency

Figure 4: The effects of 60 meters sea level rise in Europe - Source: Data for Minds

Video 1: Explains what Europe would like if all the ice melted on earth

North America

SLR is becoming an ever-greater problem in North America. SLR in the region of 90cm by 2100 will put the land of 4.2 million people under risk of inundation. While SLR of 180cm will affect 13.1 million people. SLR in the northwest Atlantic is estimated to be 5.3 +/- 2.6 mm/y  which is relatively low compared to the Pacific.

Figure 5: Schematic showing the US population living less than 3.3 feet above sea level - Source: Union of Concerned Scientists

Video 2: Shows how islands in Canada are experiencing very similar effects to those seen in the Pacific in terms of shoreline erosion, SLR and issues surrounding water supply

Figure 6: The effects of 60 meters sea level rise in North America - Source: Data for Minds

South America

Currently only 6% of the South American population live in low-elevation coastal zones, however this is thought to increase dramatically with population growth (Find out more about the effects of population on climate change on my friends blog). Estimates suggest by 2050 8.9 million inhabitants will be effected by inundation, damaging USD819 billion in built capital.  Cities such as Rio and Lima are expected to experience SLR of 14cm. Furthermore, the ice melt in Patagonia is thought to contribute considerable to SLR.

Figure 7: Schematic displaying the cities at risk of sea level rise in South America 

Asia

The effects of SLR in Asia are potentially enormous. Globally, the continent has the highest concentration of people in low lying coastal zones. SLR is very high near the Philippines at approximately 14.7 +/- 4.39 mm/y and Indonesia at  8.3 +/- 1.53 mm/y. 

Video 3: Explains what Asia would look like if all the ice on earth melted

Figure 8:  Schematic displaying the cities at risk of sea level rise in Asia - Source: UN Habitat Global Urban Observatory 2008

Africa

Approximately 56 million people live in low elevation across 320 coastal cities in Africa. A mid-range scenario of 43cm rise by 2100 would flood 16 million people's homes and 10 million people would be forced to migrate causing damages worth $38 billion.

Figure 9: Schematic displaying the cities at risk of sea level rise in Africa - Source: UN Habitat Global Urban Observatory 2008

Video 4: Explains the problems associated with SLR in West Africa

Although SLR is a serious global problem, it is undoubtedly worse in the Pacific, where whole populations and islands will disappear. In my next post, I will explain how the South Pacific compares!

Wells