know your forcingcurrent approaches to evaluate l-a coupling. terrestrial coupling works well . but....
TRANSCRIPT
![Page 1: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/1.jpg)
Know Your Forcing
![Page 2: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/2.jpg)
Know Your Forcing
![Page 3: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/3.jpg)
Suppose You Have Offline CLM Runs…
![Page 4: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/4.jpg)
Suppose You Have Offline CLM Runs…
![Page 5: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/5.jpg)
Suppose You Have Offline CLM Runs…
Does the change I made matter from a L-A feedbacks perspective?
![Page 6: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/6.jpg)
Current Approaches to Evaluate L-A Coupling
Dirmeyer et al. 2011 GRL
Terrestrial Coupling
latent heat flux variability controlled by soil moisture variation
![Page 7: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/7.jpg)
Current Approaches to Evaluate L-A Coupling
Dirmeyer et al. 2011 GRL
Terrestrial Coupling σSoilM
d(Latent)
d(SoilM)
Terrestrial Coupling
latent heat flux variability controlled by soil moisture variation
![Page 8: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/8.jpg)
Current Approaches to Evaluate L-A Coupling
Dirmeyer et al. 2011 GRL; Lombardozzi et al. 2016 GMDD
Terrestrial Coupling σSoilM
d(Latent)
d(SoilM)
Terrestrial Coupling
latent heat flux variability controlled by soil moisture variation
Control With nighttime gs
![Page 9: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/9.jpg)
Current Approaches to Evaluate L-A Coupling
Terrestrial Coupling works well but
only measures flux sensitivity to moisture availability
![Page 10: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/10.jpg)
Current Approaches to Evaluate L-A Coupling
Terrestrial Coupling works well but
only measures flux sensitivity to moisture availability
![Page 11: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/11.jpg)
Current Approaches to Evaluate L-A Coupling
Terrestrial Coupling works well but
only measures flux sensitivity to moisture availability
Go full CAM-CLM simulation
![Page 12: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/12.jpg)
Current Approaches to Evaluate L-A Coupling
Terrestrial Coupling works well but
only measures flux sensitivity to moisture availability
Go full CAM-CLM simulation
![Page 13: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/13.jpg)
TBOT QBOT PBOT RAIN RADIATION … etc
DATM
![Page 14: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/14.jpg)
TBOT QBOT PBOT RAIN RADIATION … etc
Prognostic and Diagnostic Variables
DATM
![Page 15: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/15.jpg)
TBOT QBOT PBOT RAIN RADIATION … etc
Prognostic and Diagnostic Variables
DATM
So how can we extract land-atmosphere feedback information?
![Page 16: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/16.jpg)
PBOT RAIN RADIATION … etc
Prognostic and Diagnostic Variables
There is a structure up here!
TBOT QBOT
![Page 17: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/17.jpg)
Simple Convective Boundary Layer Model
Sensible Latent
Fluxes from CLM
![Page 18: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/18.jpg)
Simple Convective Boundary Layer Model
Mixed Layer Equations
![Page 19: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/19.jpg)
Simple Convective Boundary Layer Model
Mixed Layer Equations
*** Assume 1-D and no diabatic processes
![Page 20: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/20.jpg)
Simple Convective Boundary Layer Model
Mixed Layer Equations
![Page 21: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/21.jpg)
Simple Convective Boundary Layer Model
Mixed Layer Equations
![Page 22: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/22.jpg)
Simple Convective Boundary Layer Model
Sensible Latent
Fluxes from CLM
![Page 23: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/23.jpg)
Sensible
Simple Convective Boundary Layer Model
![Page 24: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/24.jpg)
Simple Convective Boundary Layer Model
Latent
![Page 25: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/25.jpg)
Simple Convective Boundary Layer Model
ΔTBOT ΔQBOT
** Note that there is now a prognosed TBOT and QBOT
![Page 26: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/26.jpg)
Simple Convective Boundary Layer Model
** Now we can compare the “drift” from the forcing over time due to the sensible and latent heat fluxes
Time of Day
Bott
om L
evel
Tem
p [K
]
![Page 27: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/27.jpg)
Simple Convective Boundary Layer Model
** Now we can compare the “drift” from the forcing over time due to the sensible and latent heat fluxes
Time of Day
Bott
om L
evel
Tem
p [K
]
![Page 28: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/28.jpg)
What the Model DOES NOT do…yet
Once saturation is reached at the top of the PBL, it stops
However a few diagnostics are calculated: - Convective available Potential Energy (CAPE) - Precipitable Water - Depth of Cloud
![Page 29: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/29.jpg)
Simulation to Test
Compare:
CLM 5.0 using ERA-Interim Forcing
CLM 4.5 using ERA-Interim Forcing
*** Evaluate the relative “drift” and triggering potential
![Page 30: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/30.jpg)
Simulation to Test
![Page 31: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/31.jpg)
Simulation to Test
Can use the forcing data itself do perform a wet-dry scenario experiments
![Page 32: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/32.jpg)
Wetting-Drying Experiments
Weckwerth et al. 2004
Observed Data from the:
o Atmosphere Radiation Measurement (ARM) Site in Oklahoma
o Time period: 1996-Present
o Temperature, Humidity, and Pressure vertical profiles usually 6-hourly
o Net radiation every 30-min
![Page 33: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/33.jpg)
Time of Day
Net
Rad
iatio
n (R
net)
Given that we have net radiation from ARM-SGP
![Page 34: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/34.jpg)
Time of Day
Net
Rad
iatio
n (R
net)
Given that we have net radiation from ARM-SGP
Take the morning vertical
profiles of T,q,p
![Page 35: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/35.jpg)
Time of Day
Net
Rad
iatio
n (R
net)
Given that we have net radiation from ARM-SGP
Take the morning vertical
profiles of T,q,p
Latent Heat
Sensible Heat
![Page 36: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/36.jpg)
Can Explore a continuum of evaporative fraction realities
Time of Day
Net
Rad
iatio
n (R
net)
Latent Heat
Sensible Heat Time of Day
Net
Rad
iatio
n (R
net)
Latent Heat
Sensible Heat Time of Day
Net
Rad
iatio
n (R
net)
Latent Heat
Sensible Heat
Are wet or dry surfaces more likely to trigger
moist convection (negative or positive
feedback)?
How do T and q evolve under various conditions?
![Page 37: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/37.jpg)
Wetting-Drying Experiments: ARM-SGP
June 7th 2006 over Central Plains
![Page 38: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/38.jpg)
Dry Wet
June 7th 2006 over Central Plains
Wetting-Drying Experiments: ARM-SGP
![Page 39: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/39.jpg)
Dry Wet
June 7th 2006 over Central Plains
Wetting-Drying Experiments: ARM-SGP
![Page 40: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/40.jpg)
Dry Wet
June 7th 2006 over Central Plains
Wetting-Drying Experiments: ARM-SGP
![Page 41: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/41.jpg)
Wetting-Drying Experiments: ARM-SGP
Taking all July days from 1996-2011
![Page 42: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/42.jpg)
Wetting-Drying Experiments: ARM-SGP
Taking all July days from 1996-2011
Given the same atmospheric state Dry soils more convection
Negative Feedback
![Page 43: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/43.jpg)
Relative Humidity Cross-Section: ERA-I
Evap Fraction = 0.8 July 1st 1979
![Page 44: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/44.jpg)
Suppose You Have Offline CLM Runs…
Does the change I made matter from a L-A feedbacks perspective?
![Page 45: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/45.jpg)
Suppose You Have Offline CLM Runs…
Does the change I made matter from a L-A feedbacks perspective?
![Page 46: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/46.jpg)
Wetting-Drying Experiments: ERA-I
![Page 47: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/47.jpg)
Relative Humidity Profile – ERAI
![Page 48: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/48.jpg)
![Page 49: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/49.jpg)
What state do CLM energy fluxes nudge T and Q towards?
Questions that can be Addressed
Time of Day
Bott
om L
evel
Tem
p [K
]
![Page 50: Know Your ForcingCurrent Approaches to Evaluate L-A Coupling. Terrestrial Coupling works well . but. only measures flux sensitivity to moisture availability](https://reader035.vdocuments.us/reader035/viewer/2022081613/5fbd2ca57b5bad32bc76cfb1/html5/thumbnails/50.jpg)
What state do CLM energy fluxes nudge T and Q towards?
Questions that can be Addressed
Time of Day
Bott
om L
evel
Tem
p [K
]