land modeling across scales · 2019. 6. 25. · crop1 crop1 crop2 crop2 … l g ut,h,m c1i v pft4 v...
Post on 02-Oct-2020
1 Views
Preview:
TRANSCRIPT
This material is based upon work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Cooperative Agreement No. 1852977.
Land Modeling Across Scales
June 17, 2019
Peter Lawrence, David Lawrence, Sean Swenson and many more
Terrestrial Sciences Section
Modeling and Data Assimilation Review | 6-8 June 2016
The Community Land Model (CLM) key processes
Direct so
lar
Absorbed solar
Diffu
se s
ola
r
Dow
nw
ellin
g
longw
ave
Reflected solar
Em
itte
d
longw
ave
Sensi
ble
heat
flux
Late
nt
heat
flux
ua 0
Momentum flux Wind speed
Ground heat flux
Evaporation
Melt
Sublimation
Throughfall
Infiltra- tion
Surface runoff
Evaporation
Transpiration
Precipitation
Heterotrop. respiration
Photosynthesis
Autotrophic respiration
Litterfall
N uptake
Vegetation C/N
Soil C/N
N mineral- ization
Fire
Surface energy fluxes Hydrology Biogeochemical cycles
Aerosol deposition
Soil (sand, clay, organic)
Sub-surface runoff
Aquifer recharge
Phenology
BVOCs
Water table
Soil
Dust
Saturated fraction
N dep N fix
Denitrification N leaching
CH4
Root litter
N2O SCF
Surface water
Bedrock Unconfined aquifer
CLM (CGD)
Noah-MP, WRF-Hydro (RAL)
• CTSM (unification) benefits:
• extend NCAR leadership in community modeling
• reverse trends of model proliferation and shantytown syndrome
• more efficient use of NCAR and community model development resources
• integrate and expand land modeling research
• accelerate advances, improve science through multiple hypothesis testing
The Community Terrestrial System Modela unified model for research and prediction in climate, weather, water, and ecosystems
CTSM
Spatial resolutions
• Global (low and high resolution)
• Regional
• Single point (tower site)
• Irregular grids (cubed sphere, basin)
Temporal resolutions
• Fixed vegetation distributions (paleo, current day)
• Annual Land Use and Land Cover Change specified
for time periods (historical, scenarios, alternatives)
• Model states and fluxes updated at 30 minute time
step with some adaptive time stepping and
accumulating state variables
Model Complexity
• SP (satellite phenology, prescribed vegetation)
• BGC (prognostic carbon, vegetation)
• BGC-crop (default in CESM2, same as BGC with crops)
• BGC no-anthro
• BGC FATES
• Simplified SP (reduced pfts and soil layers) for use in weather
prediction
CTSM Land Modeling Across Scales and Complexity
Heterotrop.
respiration
Photosynthesis
Autotrophic
respiration
Litterfall
N
uptake
Vegetation C/N
Soil
C/N N mineralization
Fire
Biogeochemical
cyclesPhenology
BVOCs
N dep
N fix
Denitrification
N leaching
CH4
Root litter
N2O
CTSM Physical Modeling Components
Evaporation
Melt
Sublimation
Throughfall
InfiltrationSurface runoff
Evaporation
Transpiration
Precipitation Hydrology
Sub-surface runoff
Water table
Saturated Zone
Soil
Saturatedfraction
Impermeable Bedrock
Absorbed solar
Diffu
se s
ola
r
Do
wnw
elli
ng
longw
ave
Reflected solar Em
itte
d
longw
ave
Sensi
ble
heat
flu
x
Lat
ent
heat
flu
x
ua0
Momentum flux
Wind speed
Ground
heat flux
Surface energy
fluxes
Aerosol
deposition
Soil (sand, clay, organic)
Dust
SCFSurface
water
Bedrock
Gridcell
GlacierLake
Landunit
Column
PFT
UrbanVegetated
Soil
Crop
PFT1 PFT2 PFT3 PFT4 …
Unirrig Irrig Unirrig Irrig
Crop1 Crop1 Crop2 Crop2 …
L
G
UT,H,M
C1I V
PFT4
V
PFT3
V
PFT1
V
PFT2
C1U
C2UC2I
Roof
Sun Wall
Shade
Wall
Pervious
Impervious
TBD
MD
HD
CTSM Sub Grid Heterogeneity - Tiling
Gridcell
GlacierLake
Landunit
UrbanVegetated Crop
Unirrig Irrig Unirrig Irrig
Crop1 Crop1 Crop2 Crop2 …
TBD
MD
HD
CLM 5 LULCC for
Natural PFT and
Crop
Column
Unirrig
PFT1 PFT2
Annual
Land Use
Change
CTSM Land Cover Change – Prescribed Annual Changes
Gridcell
GlacierLake
Landunit
Column
PFT
UrbanVegetated
Soil
Crop
PFT1 PFT2 PFT3 PFT4 …
L
G
UT,H,M
C1I V
PFT4
V
PFT3
V
PFT1
V
PFT2
C1U
C2UC2I
TBD
MD
HD
CTSM Land Use – Prescribed Wood Harvest (biomass)
Gridcell
GlacierLake
Landunit
UrbanVegetated Crop
Unirrig Irrig Unirrig Irrig
Crop1 Crop1 Crop2 Crop2 …
L
G
UT,H,M
C1I V
PFT4
V
PFT3
V
PFT1
V
PFT2
C1U
C2UC2I
TBD
MD
HD
Planting
Leaf
emergence
Grain fillHarvest
Crop Model
Irrig /
Fertilize
CLM 5 LULCC for
Natural PFT and
Crop
CTSM Land Use – Crop Model Prescribed Management
CTSM Land Use and Land Cover Data
CTSM Land Use and Land Cover Data 1km
CTSM Land Use and Land Cover Data 1km
CTSM Land Use and Land Cover Data 1km
CTSM – Soil Moisture Heterogeneity
CTSM – Sub Grid Soil Moisture Heterogeneity
CTSM – Sub Grid Hillslopes
CTSM – Sub Grid Soil Moisture Connectivity
Questions?
top related