Matthew Shupe – Univ. of Colorado/NOAA On behalf of ARM MOSAiC Team Matthew Shupe, Gijs de Boer, Klaus Dethloff, Elizabeth Hunke, Wieslaw Maslowski, Allison.

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Presentation transcript:

Matthew Shupe – Univ. of Colorado/NOAA On behalf of ARM MOSAiC Team Matthew Shupe, Gijs de Boer, Klaus Dethloff, Elizabeth Hunke, Wieslaw Maslowski, Allison McComiskey, Ola Persson, David Randall, Michael Tjernström, David Turner, HansVerlinde Science Plan Writing Team D. Barber, K. Dethloff, S. Gerland, J. Inoue, C. Lee, B. Loose, A. Makshtas, W. Maslowski, M. Nicolaus, D. Notz, I. Peeken, D. Perovich, O. Persson, J. Schmale, M. Shupe, M. Tjernström, T. Vihma, J. Zhao Polarstern Proposal Team K. Dethloff, R. Neuber, A. Rinke, U. Wacker, C. Lupkes, M. Nicolaus, R. Gerdes, T. Kanzow, I. Peeken, A. Macke, M. Shupe MOSAiC Multidisciplinary drifting Observatory for the Study of Arctic Climate

Francis et al Dukhovskoy et al

The central Arctic is changing dramatically, characterized by major sea-ice decline & more younger ice. Do we know why? and (importantly) how? Courtesy J. Stroeve Arctic in Transition Sept nsidc.org median

We lack a system- and process-level understanding of change, due to a lack of observations! Potential emergence of new processes, tipping points Feedbacks with “globally significant consequences” (IPCC) Implications for regional and lower-latitude weather Implications for resource development, commerce, ecosystems, productivity, communities Implications of Change Francis et al noaa.gov

Incoming solar radiation 200 W m 2 Reflected by clouds, aerosol & atmosphere Reflected by surface Absorbed by atmosphere 59 Turbulence 3 3 Evapo- transpiration Surface radiation Absorbed by surface reflected solar radiation 115 W m 2 back radiation emitted by atmosphere 30 Outgoing longwave radiation 183 W m 2 Absorbed by surface ARCTIC ENERGY BUDGET (  > 65°N) Sea ice 96 Sea-Ice Energy Budget Persson et al Decadal decline can be explained by ~1 W/m 2 excess. Kwok and Untersteiner 2011

Critical Model Shortcomings ~ 0 W m -2 ~-25 W m -2 ~-10 W m -2 Tjernström et al Regional Climate Models evaluated against SHEBA radiative fluxes reveal major biases and spreads, especially under clouds. Such biases can have serious implications for sea-ice concentrations.

Critical Model Shortcomings Comparison of IPCC AR4 models of sea-surface salinity: Major differences suggest lack of consistency in important processes such as ocean mixing, dynamics, sea-ice processes, freshwater input, and/or others. Holland et al Best estimate of actual field based on observations

Multi-year, coordinated, and comprehensive measurements, extending from the atmosphere through the sea-ice and into the ocean, are needed in the central Arctic Basin to provide a process-level understanding of the changing central Arctic climate system that will contribute towards improved modeling of Arctic climate and weather, and prediction of Arctic sea-ice concentrations. The MOSAiC Plan

What: 1)Deploy heavily instrumented, manned, ship-based, Arctic Ocean observatory for comprehensive, coordinated observations of the Arctic atmosphere, cryosphere, and ocean. 2)Network of spatial measurements to provide context and variability (buoys, gliders, UAVs, aircraft, ships, satellites, ice stations). 3)Coordinated modeling activities at many scales from process-study to regional climate models. The MOSAiC Plan

When: Autumn 2018 > Autumn 2019 Where: Central Arctic Basin ice pack Who: Coordinated through IASC International participation (e.g. US, Germany, Sweden, France, Russia, Finland, Norway, Canada, Korea, Japan, China,….) International infrastructure Synchronized international funding September 2011 sea ice extent (courtesy NSIDC). Numerous drift tracks of stations suggest possible observatory tracks The MOSAiC Plan

Leading Science Question: “What are the causes and consequences of an evolving and diminished Arctic sea ice cover?” MOSAiC Science Drivers Sea-ice Lifecycle as a Theme. Use a sea-ice “Lagrangian” perspective, where ice processes integrate forcings from atmos and ocean.

Energy Budgets Radiation Upper Ocean Heat Storage Mixing Processes Turbulence Stratification Boundary Layers Momentum Fluxes Sea-Ice Energy Budgets Incoming solar radiation Reflected solar Reflected surface Absorbed by atmosphere Emitted-Absorbed by ice back radiation emitted by atmosphere Outgoing LW Absorbed by ice Sea ice Large-scale advection Turbulence Transmitted Turbulence Sea ice Ocean Atmosphere

Ice Motion / Deformation Rigor et al Ice Age Ice Thickness Dist’n Floe Size Dist’n Ridging / Leads FYI Roughness / Drag Dynamics / Velocity Ice –Wave Interactions

Clouds/Precip/Aerosols Phase Partitioning / Mixed-phase Radiative Processes Cloud dynamics / Turbulence Spatial Organization Cyclogenesis Aerosol Conc. / Source attribution Precipitation Morrison et al

BioGeoChem Processes Surface Gas Exchange Carbon Cycle Nutrient Transfer Ice Algae / Biota Sea Ice Ecosystems Primary Productivity Aerosol Precursors

Large-Scale Implications War- mer Col- der War- mer Jaiser et al. Large-scale Transport Synoptic variability Linking local processes & hemispheric patterns Upscaling Implications of regional change

Process-study vs. climatology Process perspective suited to parameterization evaluation & development Requires complex measurements to characterize interdependent processes Distributed measurements for spatial variability & context on key parameters Process Perspective Ocean Sea-ice Atmosphere

Measurements Micro- meteorology gases, aerosols, clouds & precip. atmospheric profiling, BL, & dynamics leads & ocean surface ocean state, profiling, & dynamics aircraft + UASs ocean and ice bio/chem buoys, AUVs, gliders ice profiling, thermodynamics, mass budgets surface energy budget

Transpolar Drift track Objectives: Observe full sea-ice “life cycle,” starting in new ice. Trajectory that will last for at least (more than) 1 year Observe an understudied region Challenges: Central Arctic is isolated First year ice will be difficult 2011 Planning the Drift Track

Arctic climate system has memory. Sea-ice integrates energy budgets. Processes vary over the annual cycle. Important to understand all phases of the sea-ice life cycle: Formation > growth > transport/deformation > melt/decay/export Past observations biased towards summer (warm, easy); Relatively little understanding of winter processes. Full Annual Cycle Perovich et al Persson et al. 2002

Central Model Role Models play critical roles: Identify important measurements, processes Guide drift track Integrate process information Provide spatial context Linkage w/ lower latitudes

Model considerations: Hierarchy of model activities: process, regional, global Regional model intercomparison project Model “testbed” > Critical data for parameterization evaluation & development Strong ties with WWRP Year of Polar Prediction (YOPP) Central Model Role

Previous experiences within the Arctic ice pack: Russian drifting stations SHEBA Shorter-term campaigns Many disciplinary obs. Some inter-disciplinary obs. Each of these has key limitations: Length of time Comprehensiveness Spatial context Not in the “new” Arctic Russian drifting station SHEBA Building off the Past

Broad Support Strong linkages with identified international priorities: IASC broad support > ICARPIII WWRP – Polar Predictability Project WMO Climate and Cryosphere US Arctic Observing “Showcase Project” NASA Arctic priorities workshop ECMWF modeling priorities workshop Links to US IARPC priorities Links to US SEARCH 5-year goals

Planning workshops: Potsdam 2011, Boulder 2012, Potsdam 2013 Polarstern feasibility acceptance, 2013 Polarstern full proposal submitted, 2014 DOE ARM proposal supported, 2014 Initial Science Plan released, 2014 Funders meeting, April 2015 Key Milestones

Thanks! MOSAiC into the Future Tentative MOSAiC Schedule  “Finalize” Science Plan – 2015  Logistics planning - Ongoing  Implementation Workshop and Plan – spring/summer 2015  US interagency proposal(s) – Autumn 2015  EU Proposal  Preparatory modeling & instrument development 2015>  MOSAiC Open Science Meeting – 2016?  Field deployment September