CESM WG co-chair meeting

March 18 2014

Announcements/Updates

CSL Usage:Development: 73%/113% for 30/90 day (150%/133% cut off)Production: 128%/179% for 30/90 day (220%/190% cut off)

• Extension to CSL will appear May 1• LandIce/Paleo/CCVWG meeting updates• Gokhan’s seminar today!• Other updates/announcements?

NO MEETING NEXT WEEK (BVSD SPRING BREAK)

CISM Development Timeline

June, 2013(CESM1.2)

June, 2014 June, 2015(CESM1.3)

June, 2016(CESM2)

CISM1 physics (SIA)

CISM2 code base included in CESM

One-way coupling(no feedbacks from CISM to

other components)

Physics

Coup

ling

Dycore

CISM2 stand-alone release

Runoff / calving fluxes -> POP

CISM2 in CESM(nominal sci. support)

Two-way couplingwith CISM1 physics(and ideally CISM2)

Two-way couplingwith CISM2 physics

Development & testing of robust CISM2 dycore

Testing of CESM-CISM2 coupled system

Additional testing and support for CESM-CISM2 (relative to 1.3 release)

Scientific validation oftwo-way coupling

with CISM2 physics

CISM2 physics (parallel, 3d, 1st-order accurate dycore)

test & validate parallel conservation of mass & energy schemes

test & validate working isostasy for CISM2 in CESM; test & validate

enthalpy scheme for energy conservation

Glacier areas -> CLM

Topography -> CAM(no immediate plans to bring to trunk) Complete conservation

Limited support for Antarctica

Scientific evaluation oftwo-way coupling

V & V toolkit (in collab. w/ PISCEES)

CISM2 in CESM(additional sci. support)

CISM2 physics (parallel, 3d, 1st-order accurate dycore)

CVCWG Timeline

2014 2015 2016CESM2.0

Release LE data

Complete 30 member LE

Decadal prediction ½°

Single forcing at ¼°

¼°CAM5-SE AMIP and coupled including full suite

Perturbed physics: land and atmos

Time slices at ¼°

CESM1-IAM 1°

Decadal Prediction

CESM1/GLIMMER-CISM

Hurricane effects (CCSM4 1°)

BGC RCP runs at 1°

Complete CESM1-CAM5 single forcing runs

CESM2/BGC at ¼°

1/8° CAM5-SE

Time slices at 1/8°

Decadal prediction ¼°

5-member AMIP CAM5 1° and ¼° (1900-present)

8-member POGA w/o radiative forcing changes

CESM1/CAM5 (1920-pres)

PaleoWG updateMarch 2014

• Last Millennium (LM) “mini-MOAR” simulation to be started this week.

• Plan to submit LM ensemble to CMIP6; requires DECK experiments to be completed with CESM1.1.1(CAM5) FV2x1.

• Release of LM simulation ensemble in Fall 2014.

• Stable water and carbon isotope coupling among components: discussions needed among relevant WGs

• Plan to support tools for creating datasets for paleo runs only for CESM1.1.1 and later.

PaleoWG CESM2 development (in progress)

Abiotic radiocarbon

in POP2

Biotic carbon isotopes in

POP2

CESM1.3 coupled water

isotopes

2014 2015 2016June 2014

June 2015

June 2016

Pa/Th and Neodymium

Carbon isotopes in CAM5 and

coupler

Water isotopes in

CAM5, POP2,

coupler

Water isotopes

in CLM4.5 CICE4, RTM

CESM1.3 coupled carbon

isotopes

Carbon isotopes in

RTM (?)

Transition carbon isotopes to CAM6, CLM5

Transition water isotopes to CAM6, CLM5, CICE5