Annual mean precipitation (colour), SST (contours) & surface wind

Slides:

Advertisements

Similar presentations

Alan Robock Department of Environmental Sciences Rutgers University, New Brunswick, New Jersey USA

Advertisements

Ocean-Atmosphere Interaction: A Tropical Thermostat for Global Warming

Analysis of Eastern Indian Ocean Cold and Warm Events: The air-sea interaction under the Indian monsoon background Qin Zhang RSIS, Climate Prediction Center,

Trying to Stop a Leak in the Operational Global Model Thomas J. Galarneau, Jr. Mesoscale Dynamics Section Mesoscale and Microscale Meteorology Laboratory.

GFDL’s IPCC AR5 Coupled Climate Models: CM2G, CM2M, CM2.1, and CM3 Presented by Robert Hallberg But the work was done by many at NOAA/GFDL & Princeton.

Role of the Southern Ocean in controlling the Atlantic meridional overturning circulation Igor Kamenkovich RSMAS, University of Miami, Miami RSMAS, University.

Modeling of Regional Ocean-Atmosphere Feedback in the Eastern Equatorial Pacific; Tropical Instability Waves Hyodae Seo, Art Miller and John Roads Scripps.

Submesoscale secondary instability in an upwelling system: mechanisms and implications for upper ocean dynamics X. Capet, J. McWilliams, J. Molemaker,

Thermohaline Circulation

Potential temperature ( o C, Levitus 1994) Surface Global zonal mean.

Define Current decreases exponentially with depth. At the same time, its direction changes clockwise with depth (The Ekman spiral). we have,. and At the.

Surface wind stress Approaching sea surface, the geostrophic balance is broken, even for large scales. The major reason is the influences of the winds.

Chris Birchfield Atmospheric Sciences, Spanish minor.

Thermohaline Circulation in the Coupled GISS/HYCOM Climate Simulation Shan Sun NASA/GISS Rainer Bleck Los Alamos National Laboratory.

Equatorial Annual Cycle Shang-Ping Xie IPRC/Met, University of Hawaii Ocean University of China PowerPoint file available at

Coupled Climate Models OCEAN-ATMOSPHEREINTERACTIONS.

Define Current decreases exponentially with depth and. At the same time, its direction changes clockwise with depth (The Ekman spiral). we have,. and At.

Ocean energetics in GCMs: how much energy is transferred from the winds to the thermocline on ENSO timescales? Alexey Fedorov (Yale) Jaci Brown (CSIRO)

1.Introduction 2.Description of model 3.Experimental design 4.Ocean ciruculation on an aquaplanet represented in the model depth latitude depth latitude.

Walker Circulation. Mean Tropical Overturning Circulations (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

1-Slide Summary Explicit Southern Ocean eddies respond to forcing differently than parameterizations.  We need eddy resolving ocean climate models. Spurious.

EVAT 554 OCEAN-ATMOSPHERE DYNAMICS FILTERING OF EQUATIONS FOR OCEAN LECTURE 10 (Reference: Peixoto & Oort, Chapter 3,8)

© Crown copyright Met Office Decadal predictions of the Atlantic ocean and hurricane numbers Doug Smith, Nick Dunstone, Rosie Eade, David Fereday, James.

EVAT 554 OCEAN-ATMOSPHERE DYNAMICS FILTERING OF EQUATIONS FOR ATMOSPHERE (CONT) LECTURE 6 (Reference: Peixoto & Oort, Chapter 3)

Mixed layer heat and freshwater budgets: Improvements during TACE Rebecca Hummels 1, Marcus Dengler 1, Peter Brandt 1, Michael Schlundt 1 1 GEOMAR Helmholtz.

Update on stratocumulus simulations by the UCLA AGCM C. R. Mechoso, I. Richter, G. Cazes, and R. Terra University of California, Los Angeles OUTLINE 1.Sensitivity.

Research Center for Environmental Changes, Academia Sinica

An evaluation of satellite derived air-sea fluxes through use in ocean general circulation model Vijay K Agarwal, Rashmi Sharma, Neeraj Agarwal Meteorology.

Ekman pumping Integrating the continuity equation through the layer:. Assume and let, we have is transport into or out of the bottom of the Ekman layer.

Impact of wind-surface current covariability on the Tropical Instability Waves Tropical Atlantic Meeting Paris, France October 18, 2006 Tropical Atlantic.

Role of the Gulf Stream and Kuroshio-Oyashio Systems in Large- Scale Atmosphere-Ocean Interaction: A Review Young-oh Kwon et al.

Question: Why 45 o, physics or math? andare perpendicular to each other 45 o relation holds for boundary layer solution Physics: Coriolis force is balanced.

A Synthetic Drifter Analysis of Upper-Limb Meridional Overturning Circulation Interior Ocean Pathways in the Tropical/Subtropical Atlantic George Halliwell,

Contrasting Summer Monsoon Cold Pools South of Indian Peninsula Presented at ROMS/TOMS Asia-Pacific Workshop-2009, Sydney Institute of Marine Sciences,

Class 8. Oceans Figure: Ocean Depth (mean = 3.7 km)

Discussion groups Goal: Understand interaction between the ITCZ and upwelling zones (Benguela, Guinea, eastern cold tongue) and the implications for predictability.

The CHIME coupled climate model Alex Megann, SOC 26 January 2005 (with Adrian New, Bablu Sinha, SOC; Shan Sun, NASA GISS; Rainer Bleck, LANL)  Introduction.

Estimating Vertical Eddy Viscosity in the Pacific Equatorial Undercurrent Natalia Stefanova Masters Thesis Defense October 31, 2008 UW School of Oceanography.

Ocean Climate Simulations with Uncoupled HYCOM and Fully Coupled CCSM3/HYCOM Jianjun Yin and Eric Chassignet Center for Ocean-Atmospheric Prediction Studies.

By S.-K. Lee (CIMAS/UM), D. Enfield (AOML/NOAA), C. Wang (AOML/NOAA), and G. Halliwell Jr. (RSMAS/UM) Objectives: (1)To assess the appropriateness of commonly.

Homework 1 Solutions. Problem One Use Clausius-Clapeyron Curve From 0 o C to 3 o C – Change of ~1mb From 25 o C to 28 o C – Change of ~5mb (8)

On the role of circulation and mixing in the ventilation of the oxygen minimum zone of the eastern tropical North Atlantic Peter Brandt with contributions.

Wind-SST Coupling in the Coastal Upwelling --- An Empirical Numerical Simulation X. Jin, C. Dong, and J. C. McWilliams (IGPP/UCLA) D. B. Chelton (COAS/OSU)

Interannual to decadal variability of circulation in the northern Japan/East Sea, Dmitry Stepanov 1, Victoriia Stepanova 1 and Anatoly Gusev.

Michael J. McPhaden & Dongxiao Zhang NOAA/PMEL Decadal Variability and Trends of the Pacific Shallow Meridional Overturning Circulation and Their Relation.

Lecture 12 Rossby waves, propagation, breaking, climatic effects

© University of Reading 2006www.reading.ac.uk11 April 2008 Boundary layer ventilation by baroclinic systems Victoria Sinclair Suzanne Gray & Stephen Belcher.

UNDERSTANDING OCEAN SALINITY

VOCALS-UK Len Shaffrey and Thomas Toniazzo Walker Institute, University of Reading John Constable ‘Cloud Study’ 1822.

Tropical Atlantic studies with SPEEDO Wilco Hazeleger Rein Haarsma Camiel Severijns.

Tropical Atlantic SST in coupled models; sensitivity to vertical mixing Wilco Hazeleger Rein Haarsma KNMI Oceanographic Research The Netherlands.

Monsoons. Monsoon Flow Patterns (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Our water planet and our water hemisphere

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

Define and we have • At the sea surface (z=0), the surface current flows at 45o to the right of the wind direction Depends on constant Az => • Current.

OCEAN RESPONSE TO AIR-SEA FLUXES Oceanic and atmospheric mixed

For environment: Then For small δz (i.e., (δz)2 and higher terms are negligible),

Hongyan Zhu, Harry Hendon and Rachel Stratton

O. Melnichenko1, N. Maximenko1, and H. Sasaki2

Fine-scale Air-sea Interactions Due to Oceanic Deep Jets

Young-Oh Kwon and Clara Deser NCAR

Roles of Banda Sea to air-sea interaction over Indonesia, the existing oceanographic measurements and future plans of oceanographic observatories in the.

Walker Circulation.

Heat Transport by the Atmosphere and ocean

ENSO Outlook in spring/summer 2013 Beijing Climate Center/CMA

Climate Dynamics 11:670:461 Alan Robock

Deep Circulation Changes in density cause ocean currents Cold Warm

Impacts of Air-Sea Interaction on Tropical Cyclone Track and Intensity

Presentation transcript:

Annual mean precipitation (colour), SST (contours) & surface wind mm/day The ETP has striking zonal and meridional asymmetries … results from iROAM

Overturning circulation

σ=22.9 Colour: Diapycnic velocity Contours: Depth of density surface σ=23.9 implications for mini PUMP

Vertical mixing in the ocean is parameterized using the Pacanowski and Philander (1981) scheme, i.e. Κv = f(Ri) + κ0 We will consider impact of the background level of tracer mixing, κ0 Low: κ0 = 10-6 m2s-1 (control) High: κ0 = 5 x 10-5 m2s-1

Δsurface temperature when background diffusivity increased April October Contour interval 0.5oC

Increasing diffusion decreases meridional asymmetry ΔSST = 0.9C Low diffusion (10N-10S) 0.4C High diffusion

Change in SST and surface along the equator

Arrows: (0-30m) velocity. Colour: SST Low ocean κ0 High ocean κ0 Arrows: (0-30m) velocity. Colour: SST

Closing remarks Eastern Tropical Pacific Ocean/atmosphere coupling important from TIW to basin scales Need to consider coupled system when assessing the sensitivity of the system to model parameters/physics/resolution Reducing vertical mixing decreases zonal asymmetry while increasing meridional Reducing vertical mixing increases the role of advection in the mixed layer heat budget