PM2.5 Degradation

Source: IPCC CMIP6 (GFDL-ESM4, GISS-E2-1-G, MIROC-ES2L) Year: 2005-2014 Category: Scenario Format: Raster grid (COG) Used in risk analysis: Yes. It is the present-day level of the Atmosphere asset in Resilience, air-quality facet, read as a degradation. It is not a Sites & territories materiality flag.

What it shows

This layer shows how far the surface concentration of fine particles (PM2.5) stood above its natural background over 2005-2014. The natural background is the PM2.5 Natural Floor layer.

Resilience reads it as the level of the Atmosphere asset, for its air-quality facet. The Shock layers page explains which services read which Atmosphere facet.

How it is built

The degradation is D = (C − natural floor) / 35 µg/m³, in percent. C is the 2005-2014 surface PM2.5 of the three CMIP6 models of the PM2.5 shock. The natural floor is their 1901-1910 value. 35 µg/m³ is the WHO interim target 1.

The layer is a state, and it is deliberately not tagged as a shock layer. Tagging it would make it compete with the PM2.5 shock layers for the Atmosphere asset.

How to read it

0 % is the natural floor. 100 % is 35 µg/m³ above it. The value is not capped, so it leaves that range on both sides:

• It is negative where a cell is cleaner than its 1901-1910 floor (7 % of cells).
• It is above 100 where the excess passes 35 µg/m³.

The floor itself sits slightly high; see PM2.5 Natural Floor.

Source

CMIP6: GFDL-ESM4, GISS-E2-1-G, MIROC-ES2L.

Related pages: PM2.5 Natural Floor, PM2.5 shock (SSP1-2.6), PM2.5 shock (SSP3-7.0).

Legend

Symbolised field: PM2.5 degradation (%)

Generated from darwin/layers/layer-pm25-degradation-2014.toml (develop).