on the simulation of the qbo in waccm · on the simulation of the qbo in waccm by jadwiga (yaga)...
TRANSCRIPT
![Page 1: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/1.jpg)
On the simulation of the
QBO in WACCM
by
Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos
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Motivation
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MotivationI.WACCM was built in part to study the coupling between the
troposphere and stratosphere as well as middle atmospheric dynamics
![Page 4: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/4.jpg)
MotivationI.WACCM was built in part to study the coupling between the
troposphere and stratosphere as well as middle atmospheric dynamics
![Page 5: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/5.jpg)
MotivationI.WACCM was built in part to study the coupling between the
troposphere and stratosphere as well as middle atmospheric dynamics
II.The Quasi-Biennial Oscillation (QBO) is one of the most prominent modes of stratospheric variability
![Page 6: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/6.jpg)
MotivationI.WACCM was built in part to study the coupling between the
troposphere and stratosphere as well as middle atmospheric dynamics
II.The Quasi-Biennial Oscillation (QBO) is one of the most prominent modes of stratospheric variability
III. WACCM (and other GCMs) struggle with obtaining an internally generated QBO
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WACCM 4: Prescribed QBO
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WACCM 4: Prescribed QBOPros:
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WACCM 4: Prescribed QBOPros: • Better than no QBO Cons:
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WACCM 4: Prescribed QBOPros: • Better than no QBO Cons: • QBO has no relation to its forcing mechanisms: Kelvin,
Rossby GWs, small-scale GWs
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WACCM 4: Prescribed QBOPros: • Better than no QBO Cons: • QBO has no relation to its forcing mechanisms: Kelvin,
Rossby GWs, small-scale GWs• QBO does not respond (and it should) to changes in Tropical
convection, ENSO, etc
![Page 12: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/12.jpg)
WACCM 4: Prescribed QBOPros: • Better than no QBO Cons: • QBO has no relation to its forcing mechanisms: Kelvin,
Rossby GWs, small-scale GWs• QBO does not respond (and it should) to changes in Tropical
convection, ENSO, etc• QBO won’t respond to climate change
![Page 13: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/13.jpg)
WACCM 4: Prescribed QBOPros: • Better than no QBO Cons: • QBO has no relation to its forcing mechanisms: Kelvin,
Rossby GWs, small-scale GWs• QBO does not respond (and it should) to changes in Tropical
convection, ENSO, etc• QBO won’t respond to climate change• Connection to extra-tropics may be incorrect
![Page 14: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/14.jpg)
WACCM 4: Prescribed QBOPros: • Better than no QBO Cons: • QBO has no relation to its forcing mechanisms: Kelvin,
Rossby GWs, small-scale GWs• QBO does not respond (and it should) to changes in Tropical
convection, ENSO, etc• QBO won’t respond to climate change• Connection to extra-tropics may be incorrect
![Page 15: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/15.jpg)
QBO: Connection to Mid-latitudes
OBS
QBOE - QBOW U
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QBO: Connection to Mid-latitudes
WACCM 4OBS
QBOE - QBOW U
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QBO: Connection to Mid-latitudes
WACCM 4OBS CAM 5.3 46 L
QBOE - QBOW U
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What is needed to get the QBO?
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What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
![Page 20: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/20.jpg)
What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
2. Small-scale GWs
![Page 21: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/21.jpg)
What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
2. Small-scale GWs
(Parameterized)
![Page 22: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/22.jpg)
What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
2. Small-scale GWs
(Parameterized)
3. Adequate Vertical Resolution (500 - 700 m) in troposphere & stratosphere (Giorgetta et al 2002, Richter 2014)
![Page 23: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/23.jpg)
What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
2. Small-scale GWs
(Parameterized)
3. Adequate Vertical Resolution (500 - 700 m) in troposphere & stratosphere (Giorgetta et al 2002, Richter 2014)
4. Implicit diffusion in a dynamical core affects the QBO! (Yao and Jablonowski 2013)
![Page 24: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/24.jpg)
What is needed to get the QBO?
1. Resolved waves: Kelvin & Rossby GW’s-> generated by Convection Scheme
2. Small-scale GWs
(Parameterized)
3. Adequate Vertical Resolution (500 - 700 m) in troposphere & stratosphere (Giorgetta et al 2002, Richter 2014)
4. Implicit diffusion in a dynamical core affects the QBO! (Yao and Jablonowski 2013)
![Page 25: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/25.jpg)
QBO in CAM530L CAM5 GW
60L CAM5 GW
Richter et al. 2014
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QBO in CAM5
Resolved
Parameterized GW
Forcing:
30L CAM5 GW
60L CAM5 GW
Richter et al. 2014
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QBO in CAM5
60L CAM5 30L CAM5 60 - 30L CAM5
More Kelvin Waves
More MRG Waves
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Effects of Dynamical Core:
FV Dycore
SE Dycore
FV Dycore is more diffusive: period of QBO longer
60L CAM5 GW
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Other Modeling Centers:ECHAM-6 Beres 95 levels up to 0.01 hPa (80 km) dx ~1.9 deg;
102 levels up to 0.002 hPa (95 km); dx = 2 degNASA GISS Model E
Rind et al 2014
Schirber et al 2014
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WACCM GRIDS
Standard WACCM Grid for CMIP6: 70L
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QBO
70L WACCM 5.3
OBS
110L WACCM 5.3
ne30 ~ 1o
ne30 ~ 1o
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QBO Forcing70L WACCM 5.3 110L WACCM 5.3
Resolved Resolved
Parameterized GW Parameterized GW
ne30 ~ 1o ne30 ~ 1o
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WACCM 2 deg with 110L?
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WACCM 2 deg with 110L?
110 Lne 30 (1deg)
110 LFV 2 x 2.5 deg
Could be tuned to get right period
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WACCM 5.4 CLUBB
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WACCM 5.4 CLUBBCLUBB Default CLUBB 1800TRMM
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WACCM 5.4 CLUBB
70L WACCM 5.4 FV
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WACCM 5.4 CLUBB
70L WACCM 5.4 FV
70L WACCM 5.4 FV CLUBB
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WACCM 5.4 CLUBB
70L WACCM 5.4 FV
70L WACCM 5.4 FV CLUBB
70L WACCM 5.4 FV CLUBB 1800
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WACCM 5.4 CLUBB
CLUBB Default CLUBB 1800Resolved Resolved
Parameterized GW Parameterized GW
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SPARC QBOi: OverviewCoordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 42: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/42.jpg)
SPARC QBOi: Overview
Objectives:
Coordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 43: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/43.jpg)
SPARC QBOi: Overview
Objectives: • Understanding and simulating the QBO, including its sensitivity to model formulation
Coordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 44: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/44.jpg)
SPARC QBOi: Overview
Objectives: • Understanding and simulating the QBO, including its sensitivity to model formulation • Understanding and reproducing the impacts of the QBO, e.g. near the surface, at high
latitudes
Coordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 45: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/45.jpg)
SPARC QBOi: Overview
Objectives: • Understanding and simulating the QBO, including its sensitivity to model formulation • Understanding and reproducing the impacts of the QBO, e.g. near the surface, at high
latitudes • Making confident predictions about the QBO and its response to external forcings, such
as future climate change
Coordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 46: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/46.jpg)
SPARC QBOi: Overview
Objectives: • Understanding and simulating the QBO, including its sensitivity to model formulation • Understanding and reproducing the impacts of the QBO, e.g. near the surface, at high
latitudes • Making confident predictions about the QBO and its response to external forcings, such
as future climate change
Coordinators: Scott Osprey (U. of Oxford), Neal Butchart (Met Office), Kevin Hamilton (IPRC)Participating GCMs: LMDz, HadGEM2-CCS, EC-EARTH, GISS Model-E, GEOS-5, CMCC- CMS, AGCM3-CMAM, MIROC-ESM, CAM5, WACCM?
![Page 47: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/47.jpg)
SPARC QBOi:March 2015: 1st Workshop
May 2015: Finalize details of common experiments
May 2016: Complete first set experiments
Fall 2016: 2nd Workshop (Oxford)
Timeline:
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SPARC QBOi:March 2015: 1st Workshop
May 2015: Finalize details of common experiments
May 2016: Complete first set experiments
Fall 2016: 2nd Workshop (Oxford)
Timeline:
1. Recent past and projected climate change
2. Seasonal hindcasts (predictability)
3. Nudging experiments (separating QBO drivers)
Experiments:
![Page 49: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/49.jpg)
SPARC QBOi:March 2015: 1st Workshop
May 2015: Finalize details of common experiments
May 2016: Complete first set experiments
Fall 2016: 2nd Workshop (Oxford)
Timeline:
1. Recent past and projected climate change
2. Seasonal hindcasts (predictability)
3. Nudging experiments (separating QBO drivers)
Experiments:
http://tinyurl.com/QBOi3html!More info:
![Page 50: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/50.jpg)
Higher-Vertical Resolution WACCM
![Page 51: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/51.jpg)
Higher-Vertical Resolution WACCM• Doubled vertical resolution: Boundary Layer, Troposphere,
Stratosphere, Mesosphere
• 1 deg horizontal resolution
• Preferably SE Dycore
• Convection scheme tuned for PW generation
HVR WACCM:
![Page 52: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/52.jpg)
Higher-Vertical Resolution WACCM
Fall 2016: 2nd Workshop (Oxford)
May 2016: Complete first set experiments
March 2015: Model Ready?
Start Development: Now!
Timeline:
• Doubled vertical resolution: Boundary Layer, Troposphere, Stratosphere, Mesosphere
• 1 deg horizontal resolution
• Preferably SE Dycore
• Convection scheme tuned for PW generation
HVR WACCM:
![Page 53: On the simulation of the QBO in WACCM · On the simulation of the QBO in WACCM by Jadwiga (Yaga) Richter, J. Bacmeister, R. Garcia, A. Gettleman, S. Santos](https://reader034.vdocuments.mx/reader034/viewer/2022042103/5e8017ecab755114cb12f657/html5/thumbnails/53.jpg)
Higher-Vertical Resolution WACCM
Fall 2016: 2nd Workshop (Oxford)
May 2016: Complete first set experiments
March 2015: Model Ready?
Start Development: Now!
Timeline:
• Doubled vertical resolution: Boundary Layer, Troposphere, Stratosphere, Mesosphere
• 1 deg horizontal resolution
• Preferably SE Dycore
• Convection scheme tuned for PW generation
HVR WACCM:
If this is important to you, come talk to us!