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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

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Page 1: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 2: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 3: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 4: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 5: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 6: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 7: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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)

Page 8: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

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

Page 9: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM Land Use and Land Cover Data

Page 10: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM Land Use and Land Cover Data 1km

Page 11: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM Land Use and Land Cover Data 1km

Page 12: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM Land Use and Land Cover Data 1km

Page 13: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM – Soil Moisture Heterogeneity

Page 14: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM – Sub Grid Soil Moisture Heterogeneity

Page 15: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM – Sub Grid Hillslopes

Page 16: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

CTSM – Sub Grid Soil Moisture Connectivity

Page 17: Land Modeling Across Scales · 2019. 6. 25. · Crop1 Crop1 Crop2 Crop2 … L G UT,H,M C1I V PFT4 V PFT3 V PFT1 V PFT2 C1U C2I C2U TBD MD HD Planting Leaf emergence Grain fill Harvest

Questions?


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