Vd Hurk, Peters-Lidard, HouserGLASS -LoCo GLASS “LOcal-COupled” Project: “LoCo” Bart van den Hurk Christa Peters-Lidard Paul Houser TOA Radiation Horizontal

vd Hurk, Peters-Lidard, Houser GLASS -LoCo

GLASS “LOcal-COupled” Project:“LoCo”

Bart van den Hurk Christa Peters-Lidard

Paul Houser

TOA Radiation

Horizontal Flux Divergences

Single Column Model

Land Surface Model

(www.arm.gov)

A Single Column Model


Outline

• History/Context• Motivation• Science Questions• Strawman Proposal– Phases– Locations– Steps

• Timeline


History/Context

• GLASS activities– PILPS, GSWP-2, GLACE

• GABLS• GCSS

• Local Coupling Workshop in De Bilt, Apr 2002– Summary by Bart van den Hurk

et al.


MotivationOverarching goal: Accurately understand, model and predict the role of local land –

atmosphere coupling in the evolution of land-atmosphere fluxes and state variables, including clouds.

Science Questions:

• Are the results of PILPS, GSWP, or data assimilation experiments affected by the lack of land surface-atmosphere coupling?

• Can we explain the physical mechanisms leading to the coupling strength differences found in GLACE or other coupled NWP/climate experiments?

• Is there an observable diagnostic that quantifies the role of local land-atmosphere coupling?


Strawman Proposal: LoCo Phases• Phase 1: Model-based B.C.’s, 1-D

– Extract ERA-40 column boundary conditions from model over selected GLACE hotspots, including Phase 2 locations

• Phase 2: Observation-based B.C.’s, 1-D – GABLS interaction: CASES99– Pilps revisited: Cabauw – Other Sites: HAPEX/Sahel; Boreas; Fluxnet;

CEOP, HEAT (Urban), etc.?

• Phase 3: Observation-based B.C.’s, clouds/heterogeneity– GCSS interaction: SGP/ARM/IHOP– Other sites: e.g., Red-Arkansas (PILPS-2c),

Rhone-Agg, etc.


Strawman Proposal: LoCo Steps• Step 0: Pilot Studies

– Extract column boundary conditions– Dataset QA– Leads run experiments

• Step 1: PILPS (uncoupled)• Step 2: Couple LSM to native 1-D PBL/SCM• Step 3: Couple LSM to LoCo PBL/SCM• Step 4: (GABLS) Couple single LSM to

multiple PBL(s)/SCM(s)• Step 5: Uncoupled (Step 1) + data

assimilation• Step 6: Coupled (Step 2/3) + data assimilation


LoCo Location-Phase MatrixPhase 1

Model-derived b.c.’s

Phase 2

Obs.-derived b.c.’s

Phase 3:

Clouds/spatial heterogeneity

A: GLACE hotspots/transect

-Develop/Refine LoCo diagnostics

-Link GSWP2/GLACE

-Cloud formation/ superparameter-ization

B: CASES 99

with GABLS

-Pilot for Phase 2c -Understand Phase 1 vs. Phase 2

-GABLS PBL

-Steenveld et al., (2004)

Intermittent turbulent parameterization

C: Cabauw -Revisit PILPS -Understand Phase 1 vs. Phase 2

-Ek&Holtslag(2003)

D: IHOP/SGP

with GCSS

-Pilot for Phase 3d

-Trier et al. (2004)

-Understand Phase 1,2,3 Differences

-GCSS SCM/CRM


LoCo Sites (detailed) & Timing (coarse)Experiment Phase 1 Phase 2 Phase 3a. Hotspot transect loc. 1 short longb. Hotspot transect loc. 2 short longc. …d. CEOP location Cabauw mid longe. CEOP location SGP mid longf. …g. CASES site short longh. GCSS ARM site midi. HAPEX Sahel short mid longj. Boreas midk. fluxnet location 1 midl. fluxnet location 2 midm. …n. HEAT (Tx)o. Red Arkansas longp. …


LoCo Action Items• LoCo Implementation Plan

– GLASS/GMPP Approval• Proposal(s)

– $$$/Research Associates• Infrastructure

– “LoCo Central” (Website/protocols/etc.)– LoCo data assimilation modules– LoCo SCM (GABLS?)– LoCo LSM (PILPS?)

• Phase 1: LoCo Pilot Study– Draft Experiment Plan

• Phase 2: GABLS interaction– Continue discussions with Bert Holtslag– Plan joint GABLS/LoCo meeting– Draft Phase 2 CASES experiment plan

• Phase 3: GCSS interaction– Contact GCSS chairs– Find relevant/interested WGs/contacts– Draft Phase 3 experiment plan


Near Term Timeline (1 of 2)

• LoCo Implementation Plan (Bart, Christa, Paul)– Draft 1: October, 2004 (GMPP)– Final: January, 2005 (AMS)

• Proposal(s)– Christa, December, 2004– Bart, TBD– Paul, TBD

• Infrastructure– “LoCo Central” (TBD)– LoCo data assimilation modules (Paul, January,

2005)– LoCo SCM (Christa/Bart, January 2005)– LoCo LSM (GLACE/GSWP, January 2005)


Near Term Timeline (2 of 2)• Phase 0: Internal GLACE hotspot Study

– Draft Experiment Outline (January 2005)– Internal data tests (February 2005)– Begin Experiments (March 2005)– Present Results at GLASS/GABLS meeting (Early Fall 2005)

• Phase 1: GLACE hotspot Study– Final Experiment Plan (End 2005)– Data Posted (Early 2006)– Begin Experiments (Early 2006)– Submit Results (Fall 2006)

• Phase 2: GABLS interaction– Discussions with Bert Holtslag (October 2004)– Plan joint GLASS/GABLS meeting (Fix by January 2005, Target Early Fall 2005)– Draft Phase 2 CASES experiment plan (Sept 2005)

• Phase 3: GCSS interaction– Contact GCSS chairs (September 2004)– Find relevant/interested WGs/contacts (September 2004)– Meet with GCSS/LoCo principals at AMS meeting (Jan 2006)

Documents

Vd Hurk, Peters-Lidard, HouserGLASS -LoCo GLASS “LOcal-COupled” Project: “LoCo” Bart van den Hurk Christa Peters-Lidard Paul Houser TOA Radiation Horizontal