The littoral area includes the Pacific coasts of Peru and Chile, and Argentina’s Tierra del Fuego, covering a total of 725,678 km2. A current population of 30 million is projected to more than double to 68 million in 2100, and density increasing from 42 persons per km2 in 2010 to 94 per km2 by 2100. About 31% of coastal population lives in rural areas, and is projected to decrease in share to 25% in 2100.
The indigent population makes up 20% of the LME’s coastal dwellers. The Humboldt Current LME places in the high-risk category based on percentage and absolute number of coastal poor (present day estimate).
Revenues and Spatial Wealth Distribution:
Fishing and tourism depend on ecosystem services provided by LMEs
. The Humboldt Current LME ranks in the very high revenue category in fishing revenues based on yearly average total ex-vessel price of US 2013 $5,353 million for the period 2001-2010. Fish protein accounts for 16% of the total animal protein consumption of the coastal population. Its yearly average tourism revenue for 2004-2013 of US 2013 $25,715 million places it in the medium revenue category. On average, LME-based tourism income contributes 8% to the national GDPs of the LME coastal states. Spatial distribution of economic activity (e.g. spatial wealth distribution) measured by night-light and population distribution as coarse proxies can range from 0.0000 (totally equal distribution and lowest risk) to 1.0000 (concentrated in 1 place and most inequitable and highest risk). The Night Light Development Index (NLDI) thus indicates the level of spatial economic development, and that for the Humboldt Current LME falls in the category with medium risk.
Human Development Index:
Using the Human Development Index (HDI) that integrates measures of health, education and income, the present-day Humboldt Current LME HDI belongs to the high HDI and high-risk category. Based on an HDI of 0.767, this LME has an HDI Gap of 0.233, the difference between present and highest possible HDI (1.000). The HDI Gap measures an overall vulnerability to external events such as disease or extreme climate related events, due to less than perfect health, education, and income levels, and is independent of the harshness of and exposure to specific external shocks.
HDI values are projected to the year 2100 in the contexts of shared socioeconomic development pathways (SSPs). The Humboldt Current LME is projected to assume a place with the very low risk category (very high HDI) in 2100 under a sustainable development pathway or scenario. Under a fragmented world scenario, this LME is estimated to place in the high-risk category (low HDI) because of reduced income level and increased population size compared to estimated income and population values in a sustainable development pathway.
Climate-Related Threat Indices:
The Climate-Related Threat Indices utilize the HDI Gaps for present-day and projected 2100 scenarios. The contemporary climate index accounts for deaths and property losses due to storms, flooding and extreme temperatures incurred by coastal states during a 20-year period from 1994 to 2013 as hazard measures, the 2010 coastal population as proxy for exposure, and the present day HDI Gap as vulnerability measure.
The Contemporary Threat Index incorporates a Dependence Factor based on the fish protein contribution to dietary animal protein, and on the mean contribution of LME tourism to the national GDPs of LME coastal states. The HDI Gap and the degree of dependence on LME ecosystem services define the vulnerability of a coastal population. It also includes the average of risk related to extreme climate events, and the risk based on the degrading system states of an LME (e.g. overexploited fisheries, pollution levels, decrease in coastal ecosystem areas).
The 2100 sea level rise threat indices, each computed for the sustainable world and fragmented world development pathways, use the maximum projected sea level rise at the highest level of warming of 8.5 W/m2 in 2100 as hazard measure, development pathway-specific 2100 populations in the 10 m × 10 km coast as exposure metrics, and development pathway-specific 2100 HDI Gaps as vulnerability estimates.
Present day climate threat index to the Humboldt Current LME is within the high-risk (high threat) category. The combined contemporaneous risk due to extreme climate events, degrading LME states and the level of vulnerability of the coastal population, is high. In a sustainable development scenario, the risk index from sea level rise in 2100 is very low, and increases to high risk under a fragmented world development pathway.