# Model Documentation

### | Version 4.0

created with goxygen 0.21.1

# 34_urban

# Urban Land (34_urban)

## Description

The urban land module is one of the land modules in MAgPIE (see also the other land modules: 30_crop, 31_past, 32_forestry, 35_natveg). It describes urban settlement areas and estimates their corresponding carbon content.

## Interfaces

Interfaces to other modules

### Input

module inputs (A: static)
| Description | Unit | A
--- | --- | --- | ---
pcm_land (j, land) | Land area in previous time step | \(10^6 ha\) | x
vm_carbon_stock (j, land, c_pools) | Carbon stock in vegetation soil and litter for different land types | \(10^6 tC\) | x
vm_land (j, land) | Land area of the different land types | \(10^6 ha\) | x

### Output

## Realizations

### (A) static

In the static realization, urban land remains static over time with the spatial distribution of 1995 from the LUH2 data set (Hurtt, n.d.). Carbon stocks are fixed to zero because information on urban land carbon density is missing.

> Limitations Urban land is static over time and corresponding carbon stocks are assumed zero

## Definitions

### Objects

### Sets

sets in use
| description
--- | ---
c_pools | Carbon pools
land | Land pools

## Authors

Jan Philipp Dietrich, Florian Humpenöder

## See Also

10_land, 52_carbon

## References

Hurtt, L. Chini, G. n.d. “Harmonization of Global Land-Use Change and Management for the Period 850-2100.” Geoscientific Model Development.