Table A1 NLCD 2006 Land classes and their properties.
Source: http://www.mrlc.gov/nlcd06_leg.php
Class\ Value
Water
Classification Description
areas of open water or permanent ice/snow cover.
11
Open Water - areas of open water, generally with less than 25% cover of
vegetation or soil.
12
Perennial Ice/Snow - areas characterized by a perennial cover of ice and/or
snow, generally greater than 25% of total cover.
Developed
areas characterized by a high percentage (30% or greater) of constructed
materials (e.g. asphalt, concrete, buildings, etc.).
21
Developed, Open Space - areas with a mixture of some constructed materials,
but mostly vegetation in the form of lawn grasses. Impervious surfaces account
for less than 20% of total cover. Include large-lot single-family housing units,
parks, golf courses, etc.
22
Developed, Low Intensity - areas with a mixture of constructed materials and
vegetation. Impervious surfaces account for 20% to 49% percent of total cover.
These areas most commonly include single-family housing units.
23
Developed, Medium Intensity – areas with a mixture of constructed materials
and vegetation. Impervious surfaces account for 50% to 79% of the total cover.
These areas most commonly include single-family housing units.
24
Developed High Intensity -highly developed areas where people reside or work
in high numbers including apartment complexes, row houses and
commercial/industrial. Impervious surfaces account for 80% to 100% of the total
cover.
Barren
31
Forest
areas characterized by bare rock, gravel, sand, silt, clay, or other earthen
material, with little or no "green" vegetation present regardless of its inherent
ability to support life.
Barren Land (Rock/Sand/Clay) - areas of bedrock, desert pavement, scarps,
talus, slides, volcanic material, glacial debris, sand dunes, strip mines, gravel pits
and other accumulations of earthen material. Generally, vegetation accounts for
less than 15% of total cover.
areas characterized by tree cover (natural or semi-natural woody vegetation,
generally greater than 6 meters tall); tree canopy accounts for 25% to 100% of
the cover.
41
Deciduous Forest - areas dominated by trees generally greater than 5 meters tall,
and greater than 20% of total vegetation cover. More than 75% of the tree species
shed foliage simultaneously in response to seasonal change.
42
Evergreen Forest - dominated by trees greater than 5 meters tall, and greater
than 20% of total vegetation cover. More than 75% of the trees maintain their
leaves all year. Canopy is never without green foliage.
43
Mixed Forest - dominated by trees generally greater than 5 meters tall, and
greater than 20% of total vegetation cover. Neither deciduous nor evergreen
species are greater than 75% of total tree cover.
Shrubland
woody vegetation with aerial stems, less than 6 meters tall, with individuals or
clumps not touching. Both evergreen and deciduous species of true shrubs, young
trees, and trees or shrubs that are small or stunted because of environmental
conditions are included..
51
Dwarf Scrub - Alaska only. Shrubs less than 20 centimeters tall with shrub
canopy typically greater than 20% of total vegetation. Often co-associated with
grasses, sedges, herbs, and non-vascular vegetation.
52
Shrub/Scrub - Dominated by shrubs; less than 5 meters tall with shrub canopy
typically greater than 20% of total vegetation. Includes true shrubs, and trees
stunted from environmental conditions.
Herbaceous
areas characterized by natural or semi-natural herbaceous vegetation;
herbaceous vegetation accounts for 75% to 100% of the cover.
71
Grassland/Herbaceous - Dominated by gramanoid or herbaceous vegetation,
generally greater than 80% of total vegetation. Not subject to intensive tilling, but
can be utilized for grazing.
72
Sedge/Herbaceous - Alaska only areas dominated by sedges and forbs, generally
greater than 80% of total vegetation. This type can occur with significant other
grasses or other grass like plants, and includes sedge tundra, and sedge tussock
tundra.
73
Lichens - Alaska only areas dominated by fruticose or foliose lichens generally
greater than 80% of total vegetation.
74
Moss - Alaska only areas dominated by mosses, generally greater than 80% of
total vegetation.
Planted/Cultivated
areas characterized by herbaceous vegetation that has been planted or is
intensively managed for the production of food, feed, or fiber; or is maintained in
developed settings for specific purposes. Herbaceous vegetation accounts for
75% to 100% of the cover.
81
Pasture/Hay – areas of grasses, legumes, or grass-legume mixtures planted for
livestock grazing or the production of seed or hay crops, typically on a perennial
cycle. Pasture/hay vegetation accounts for greater than 20% of total vegetation.
82
Cultivated Crops – areas used for the production of annual crops, such as corn,
soybeans, vegetables, tobacco, and cotton, and also perennial woody crops such
as orchards and vineyards. Crop vegetation accounts for greater than 20% of total
vegetation.
Wetlands
areas where the soil or substrate is periodically saturated with or covered with
water.
90
Woody Wetlands - areas where forest or shrubland vegetation accounts for
greater than 20% of vegetative cover and the soil or substrate is periodically
saturated with or covered with water.
95
Emergent Herbaceous Wetlands - Areas where perennial herbaceous vegetation
accounts for greater than 80% of vegetative cover and the soil or substrate is
periodically saturated with or covered with water.
Table A2: LEAF-3 land designations and properties.
Albedo
Albedo
green
brown
.00
.00
.00
emissivity
sr
Tai_
max
max
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.14
.14
sai
Veg
Veg
clump
frac
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.24
.97
5.4
.24
.95
5.4
Veg ht
Root
Dead
Rc min
LEAF-3 Class
dep
frac
.00
.00
.00
0
0 Ocean
.00
.00
.00
.00
0
1 Lakes, rivers
.00
.00
.00
.00
.00
0
2 Icecap
.00
.00
.00
.00
.00
.00
0
3 Desert
8.0
1.0
1.0
.80
20.0
1.5
.0
500
4 Evergreen
8.0
1.0
1.0
.80
22.0
1.5
.0
500
5 Deciduous
Needle leaf
.20
.24
.95
6.2
7.0
1.0
.0
.80
22.0
1.5
0
500
6 Deciduous
Broad leaf
.17
.24
.95
4.1
7.0
1.0
.0
.90
32.0
1.5
.0
500
7 Evergreen
Broad leaf
.21
.43
.96
5.1
4.0
1.0
.0
.75
.3
.7
.7
100
8 Short grass
.24
.43
.96
5.1
5.0
1.0
.0
.80
1.2
1.0
.7
100
9 Tall grass
.20
.24
.95
5.1
1.0
.2
1.0
.20
.7
1.0
.0
500
10 Semi desert
.20
.24
.95
5.1
4.5
.5
1.0
.60
.2
1.0
.0
50
11 Tundra
.14
.24
.97
5.1
5.5
1.0
1.0
.70
1.0
1.0
0
500
12 Evergreen
Shrub
.20
.28
.97
5.1
5.5
1.0
1.0
.70
1.0
1.0
.0
500
13 Deciduous
shrub
.16
.24
.96
6.2
7.0
1.0
.5
.80
22.0
1.5
.0
500
14 Mixed
woodland
.22
.40
.95
5.1
5.0
.5
.0
.85
1.0
1.0
.0
100
15 Crop/mixed
farming
.18
.40
.95
5.1
5.0
.5
.0
.80
1.1
1.0
.0
500
16 Irrigated crop
.12
.43
.98
5.1
7.0
1.0
.0
.80
1.6
1.0
.0
500
17 Bog or marsh
.20
.36
.96
5.1
6.0
1.0
.0
.80
7.0
1.0
.0
100
18 Wooded
grassland
.20
.36
.90
5.1
3.6
1.0
.0
.74
6.0
.8
.0
500
19 Urban and
built up
.17
.24
.95
4.1
7.0
1.0
.0
.90
32.0
1.5
.0
500
20 Wetland
evergreen
broadleaf tree
Calm
Conditions
Strong UHI
Convergence
Precipitation Maximum over
Urban Center
Precipitation Minimum over City
Strong
Lateral/
Upwind
Regional
Downwind
Lateral and Downwind
Divergence
Winds
Convergence
Precipitation Maximum
Weak
Maximum Precipitation all
Moderate UHI
Convergence
Regional
Advected to Downwind Urban
Winds
Edge
LCLU & City-Size Determine Spatial and
After Formation, Aerosols Impact
Temporal Patterns of Convergence and
Precipitation
Efficiency
Heating
Fig. A1: Synthesis of urban effects on precipitation. Based on the ideas of Bornstein (2011) but
created by Niyogi (2011), Grimmond (2011), and Shepherd (2011).
Fig. A2: Surface Pressure map for the Northeast United States on 11 July 2007 suggest that
rainfall was not due to major synoptic influences or direct frontal movement.
Source: http://nomads.ncdc.noaa.gov
Fig. A3: The Skew-T plot ten hours prior to the rainfall on 11 July 2007. Here the Dew
Point line experiences instability in the atmosphere at 300mb. Source:
http://weather.uwyo.edu/upperair/sounding.html
Fig. A4: PSD for three sites for 11 July 2007 (HVFM) and 18 July 2007 (HVCM) over NYC,
Cartel (45N/71W) and the Maryland Science Center (39N/76W).
Fig. A5: RAMS Grid set up in the Northeastern United States. The grid resolutions are 16 km,
4 km, and 1 km for grids 1, 2, and 3 respectively.
Fig. A6: AERONET PSD data for July 2007. Blue arrows highlight 11 July 2007 data, red
arrows highlight 18 July 2007 data. The dashed green arrows represent the average used for
cases in which PSD was not updated. a) Fine mode modal radius. b) Coarse mode modal radius.
c) Fine mode number concentration. d) Coarse mode number concentration.
Fig.A7: RAMS model inputs showing data ingestion from AERONET, and assimilation from
NLCD/NCEP.