1. vd Hurk, Peters-Lidard, HouserGLASS -LoCo GLASS “LOcal-COupled” Project: “LoCo” Bart van den Hurk Christa Peters-Lidard Paul Houser TOA Radiation Horizontal Flux Divergence s Single Column Model Land Surface Model (www.arm.gov) A Single Column Model

2. vd Hurk, Peters-Lidard, HouserGLASS -LoCo Outline History/Context Motivation Science Questions Strawman Proposal –Phases –Locations –Steps Timeline

3. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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.

4. vd Hurk, Peters-Lidard, HouserGLASS -LoCo Motivation Overarching 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?

5. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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.

6. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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

7. vd Hurk, Peters-Lidard, HouserGLASS -LoCo LoCo Location-Phase Matrix Phase 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

8. vd Hurk, Peters-Lidard, HouserGLASS -LoCo LoCo Sites (detailed) & Timing (coarse)

9. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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

10. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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)

11. vd Hurk, Peters-Lidard, HouserGLASS -LoCo 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)