Difference between revisions of "Olson land map"
From Geos-chem
(New page: On this page we discuss the land map from Jennifer Olson that is currently used by the GEOS-Chem Dry deposition and Soil NOx emissions modules. == Overview == The GEOS-Chem [[Dry...) |
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== Overview == | == Overview == | ||
| − | The GEOS-Chem [[Dry deposition]] and [[Soil NOx emissions]] modules rely on the Olson (1992) land map | + | The GEOS-Chem [[Dry deposition]] and [[Soil NOx emissions]] modules rely on the Olson (1992) land map. This map specifies 74 different land types on the 0.5° x 0.5° "generic" grid. This grid (which is edged on -180° and has no halfpolar boxes) has longitudes and latitudes: |
| + | |||
| + | Lon centers = -179.75, -179.25, -178.75, -178.25, ... 178.25, 178.75, 179.25, 179.75 | ||
| + | Lat centers = -89.75, -89.25, -88.75, -88.25, ... 88.25, 88.75, 89.25, 89.75 | ||
| + | |||
| + | The individual Olson land types and their respective indices are as follows: | ||
| + | |||
| + | 0 Water 25 Deciduous 50 Desert | ||
| + | 1 Urban 26 Deciduous 51 Desert | ||
| + | 2 Shrub 27 Conifer 52 Steppe | ||
| + | 3 --- 28 Dwarf forest 53 Tundra | ||
| + | 4 --- 29 Trop. broadleaf 54 rainforest | ||
| + | 5 --- 30 Agricultural 55 mixed wood/open | ||
| + | 6 Trop. evergreen 31 Agricultural 56 mixed wood/open | ||
| + | 7 --- 32 Dec. woodland 57 mixed wood/open | ||
| + | 8 Desert 33 Trop. rainforest 58 mixed wood/open | ||
| + | 9 --- 34 --- 59 mixed wood/open | ||
| + | 10 --- 35 --- 60 conifers | ||
| + | 11 --- 36 Rice paddies 61 conifers | ||
| + | 12 --- 37 agric 62 conifers | ||
| + | 13 --- 38 agric 63 Wooded tundra | ||
| + | 14 --- 39 agric. 64 Moor | ||
| + | 15 --- 40 shrub/grass 65 coastal | ||
| + | 16 Scrub 41 shrub/grass 66 coastal | ||
| + | 17 Ice 42 shrub/grass 67 coastal | ||
| + | 18 --- 43 shrub/grass 68 coastal | ||
| + | 19 --- 44 shrub/grass 69 desert | ||
| + | 20 Conifer 45 wetland 70 ice | ||
| + | 21 Conifer 46 scrub 71 salt flats | ||
| + | 22 Conifer 47 scrub 72 wetland | ||
| + | 23 Conifer/Deciduous 48 scrub 73 water | ||
| + | 24 Deciduous/Conifer 49 scrub | ||
== Modifications for the grid-independent model == | == Modifications for the grid-independent model == | ||
Revision as of 19:52, 21 March 2012
On this page we discuss the land map from Jennifer Olson that is currently used by the GEOS-Chem Dry deposition and Soil NOx emissions modules.
Overview
The GEOS-Chem Dry deposition and Soil NOx emissions modules rely on the Olson (1992) land map. This map specifies 74 different land types on the 0.5° x 0.5° "generic" grid. This grid (which is edged on -180° and has no halfpolar boxes) has longitudes and latitudes:
Lon centers = -179.75, -179.25, -178.75, -178.25, ... 178.25, 178.75, 179.25, 179.75 Lat centers = -89.75, -89.25, -88.75, -88.25, ... 88.25, 88.75, 89.25, 89.75
The individual Olson land types and their respective indices are as follows:
0 Water 25 Deciduous 50 Desert 1 Urban 26 Deciduous 51 Desert 2 Shrub 27 Conifer 52 Steppe 3 --- 28 Dwarf forest 53 Tundra 4 --- 29 Trop. broadleaf 54 rainforest 5 --- 30 Agricultural 55 mixed wood/open 6 Trop. evergreen 31 Agricultural 56 mixed wood/open 7 --- 32 Dec. woodland 57 mixed wood/open 8 Desert 33 Trop. rainforest 58 mixed wood/open 9 --- 34 --- 59 mixed wood/open 10 --- 35 --- 60 conifers 11 --- 36 Rice paddies 61 conifers 12 --- 37 agric 62 conifers 13 --- 38 agric 63 Wooded tundra 14 --- 39 agric. 64 Moor 15 --- 40 shrub/grass 65 coastal 16 Scrub 41 shrub/grass 66 coastal 17 Ice 42 shrub/grass 67 coastal 18 --- 43 shrub/grass 68 coastal 19 --- 44 shrub/grass 69 desert 20 Conifer 45 wetland 70 ice 21 Conifer 46 scrub 71 salt flats 22 Conifer 47 scrub 72 wetland 23 Conifer/Deciduous 48 scrub 73 water 24 Deciduous/Conifer 49 scrub
Modifications for the grid-independent model
References
- Bey I., D. J. Jacob, R. M. Yantosca, J. A. Logan, B. Field, A. M. Fiore, Q. Li, H. Liu, L. J. Mickley, and M. Schultz, Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation, J. Geophys. Res., 106, 23,073-23,096, 2001
- Olson, J, World Ecosystems (WE1.4): Digital raster data on a 10 minute geographic 1080 x 2160 grid, in Global Ecosystems Database, version 1.0, Disc A, edited by NOAA Natl. Geophys. Data Center, Boulder, Colorado, 1992.
- Wang, Y., D.J. Jacob, and J.A. Logan, Global simulation of tropospheric O3-NOx-hydrocarbon chemistry, 1. Model formulation, J. Geophys. Res., 103, D9, 10,713-10,726, 1998.
