An analysis of the Atlantic Meridional Overturning Circulation (MOC) in an Atmosphere-Ocean General Circulation Model
|
|
|
- Jemima Stanley
- 5 years ago
- Views:
Transcription
1 An analysis of the Atlantic Meridional Overturning Circulation (MOC) in an Atmosphere-Ocean General Circulation Model Virginie Guemas, David Salas-Mélia Centre National de Recherches Météorologiques (CNRM) Laboratoire des Sciences du Climat et de l Environnement (LSCE) 1 - Model and experiments 2 - Variability of the North Atlantic ocean convection and its impact on the MOC variability 3 - MOC changes in a global warming experiment
2 1. Model and experiments ARPEGE-climat : Gaussian grid T63 Resolution : 2.8 *2.8* 45 levels OPA8-GELATO : Resolution : about 2 31 levels TRIP river routing scheme: Resolution : 1 *1 OASIS coupling software IPCC-AR4 Preindustrial control experiment : 500 years + 1) 20C experiment A1B scenario ) stabilisation A1BS
3 1. Model and experiments DJFMA mean MLD in control DJFMA mean MLD in observations GIN Seas Labrador Sea Irminger Sea Boyer-Montégut (2004) Guemas and Salas-Mélia (2007)
4 1. Model and experiments 26Sv Observational estimates : 18 +/- 5Sv (Talley et al, 2003) Guemas and Salas-Mélia (2007) No AABW cell
5 An analysis of the Atlantic Meridional Overturning Circulation (MOC) in an Atmosphere-Ocean General Circulation Model Virginie Guemas, David Salas-Mélia Centre National de Recherches Météorologiques (CNRM) Laboratoire des Sciences du Climat et de l Environnement (LSCE) 1 - Model and experiments 2 - Variability of the North Atlantic ocean convection and its impact on the MOC variability 3 - MOC changes in a global warming experiment
6 2. Variability of the North Atlantic ocean convection and its impact on the MOC variability : The GIN Seas Guemas and Salas-Mélia (2007)
7 2. Variability of the North Atlantic ocean convection and its impact on the MOC variability : The GIN Seas JFMA wind speed and SLP regressed upon the GIN Seas MLD JFMA net sea ice melting regressed upon the GIN Seas MLD More sea ice melting Less sea ice melting Northerly wind variability => sea ice edge position => convection variability Guemas and Salas-Mélia (2007)
8 2. Variability of the North Atlantic ocean convection and its impact on the MOC variability : The Irminger Sea Guemas and Salas-Mélia (2007)
9 2. Variability of the North Atlantic ocean convection and its impact on the MOC variability : The Irminger Sea JFMA wind speed and SLP regressed upon the Irminger Seas MLD JFMA non solar heat flux regressed upon the Irminger Seas MLD Northerly wind variability =>convection variability in GIN and Irminger Seas Guemas and Salas-Mélia (2007)
10 2. Variability of the North Atlantic ocean convection and its impact on the MOC variability : MOC anomalies MOC anomaly lagging MOC index leading Convection deepening => MOC anomaly which propagates southward (Mignot and Frankignoul, 2005) Guemas and Salas-Mélia (2007)
11 An analysis of the Atlantic Meridional Overturning Circulation (MOC) in an Atmosphere-Ocean General Circulation Model Virginie Guemas, David Salas-Mélia Centre National de Recherches Météorologiques (CNRM) Laboratoire des Sciences du Climat et de l Environnement (LSCE) 1 - Model and experiments 2 - Variability of the North Atlantic ocean convection and its impact on the MOC variability 3 - MOC changes in a global warming experiment
12 3 - MOC changes in a global warming experiment : MOC slowing down Annual averaged meridional overturning streamfunction : Preindutrial control experiment A1B stabilisation ( ) Sv Reduction by 35% of the maximum Guemas and Salas-Mélia (2007)
13 3 - MOC changes in a global warming experiment : Ocean convection weakening DJFMA mean MLD : Preindustrial control experiment : DJFMA mean A1BS MLD experiment in A1BS : Guemas and Salas-Mélia (2007)
14 3 - MOC changes in a global warming experiment : Ocean convection weakening DJFMA mean MLD : Temperature Salinity DJFMA mean A1BS MLD experiment in A1BS : 1500 GIN Seas +3 C +2psu Eastern Irminger Sea +2.5 C +0.3psu 1000 Western Irminger Sea -2 C -2psu 500 Labrador Sea -3 C -4psu 0 Freshening Labrador/Irminger Seas => Convection weakening Guemas and Salas-Mélia (2007)
15 3 - MOC changes in a global warming experiment : The freshening of the Labrador and Irminger Sea Freshwater flux through Fram Strait 5 : 16 trajectories originated from Fram Strait Arctic Ocean salinity : -5 psu (river runoff +50%) Southward mass flux through Fram Strait 3 (wind stress changes) 65% ARIANE particle tracking software (Blanke and Grima, Freshwater flux through Fram Strait => Freshening Labrador /Irminger Guemas and Salas-Mélia (2007)
16 3 - MOC changes in a global warming experiment : The increase in the Fram Strait outflow DJFMA ( ) barotropic streamfunction DJFMA ( )-control wind stress DJFMA ( )-control surface temperature Wind stress Sv C Surface warming => Atmospheric cyclonic circulation => Fram Strait outflow and Barents inflow => Surface warming Guemas and Salas-Mélia (2007)
17 3 - MOC changes in a global warming experiment : The increase in the Fram Strait outflow Surface temperature anomaly : SENS1-SENS2 Sea Level Pressure and wind stress anomalies C hpa Surface warming => Atmospheric cyclonic circulation anomaly Guemas and Salas-Mélia (2007)
18 Conclusions MOC variability in the preindustrial control experiment : Greenhouse-gas induced MOC changes : Positive NAO phase Labrador Sea convection Timescale : 5-10 years Northerly wind intensification Irminger Sea convection MOC anomaly Sea ice drift GIN Seas convection > GIN Seas : compensation salinity/temperature (sea ice melting) > Eastern Irminger Sea : warming > Labrador and western Irminger Sea : freshening Fram Strait freshwater flux increase
19 Conclusions MOC variability in the preindustrial control experiment : Greenhouse-gas induced MOC changes : Positive NAO phase Labrador Sea convection Northerly wind intensification Irminger Sea convection Sea ice drift GIN Seas convection Warm water inflow Barents Sea Sea ice melting SST Barents Sea Atmospheric surface warming MOC anomaly Cyclonic atmospheric circulation Spitzberg Timescale : 5-10 years Fram Strait outflow
20 Thank you for your attention Guemas, V and D. Salas-Mélia (2007) Simulation of the Atlantic Meridional Overturning Circulation in an Atmosphere-Ocean Global Coupled Model. Part I : A mechanism governing variability of the ocean convection in a preindustrial experiment. Part II : Weakening in a climate change experiment. Submitted to Climate Dynamics.
Arctic Ocean simulation in the CCSM4
Arctic Ocean simulation in the CCSM4 Alexandra Jahn National Center for Atmospheric Sciences, Boulder, USA Collaborators: K. Sterling, M.M. Holland, J. Kay, J.A. Maslanik, C.M. Bitz, D.A. Bailey, J. Stroeve,
Can Arctic sea ice decline drive a slow-down of the Atlantic Meridional Overturning Circulation (AMOC)?
Can Arctic sea ice decline drive a slow-down of the Atlantic Meridional Overturning Circulation (AMOC)? September 2012 NASA Alexey Fedorov Yale University with Florian Sevellec (NOC, Southampton) and Wei
NATIONAL OCEANOGRAPHY CENTRE, SOUTHAMPTON. RESEARCH & CONSULTANCY REPORT No. 1
NATIONAL OCEANOGRAPHY CENTRE, SOUTHAMPTON RESEARCH & CONSULTANCY REPORT No. The impact of surface flux anomalies on the mid-high latitude Atlantic Ocean circulation in HadCM3 J P Grist, S A Josey & B Sinha
Stochastically-driven multidecadal variability of the Atlantic meridional overturning circulation in CCSM3
Clim Dyn (212) 38:859 876 DOI 1.17/s382-11-14-2 Stochastically-driven multidecadal variability of the Atlantic meridional overturning circulation in CCSM3 Young-Oh Kwon Claude Frankignoul Received: 2 August
(1) Arctic Sea Ice Predictability,
(1) Arctic Sea Ice Predictability, (2) It s Long-term Loss and Implications for Ocean Conditions Marika Holland, NCAR With contributions from: David Bailey, Alex Jahn, Jennifer Kay, Laura Landrum, Steve
MERIDIONAL OVERTURNING CIRCULATION: SOME BASICS AND ITS MULTI-DECADAL VARIABILITY
MERIDIONAL OVERTURNING CIRCULATION: SOME BASICS AND ITS MULTI-DECADAL VARIABILITY Gokhan Danabasoglu National Center for Atmospheric Research OUTLINE: - Describe thermohaline and meridional overturning
Decadal-timescale changes of the Atlantic overturning circulation and climate in a coupled climate model with a hybrid-coordinate ocean component
Clim Dyn (22) 39:2 42 DOI.7/s382-2-432-y Decadal-timescale changes of the Atlantic overturning circulation and climate in a coupled climate model with a hybrid-coordinate ocean component A. Persechino
NORTH ATLANTIC DECADAL-TO- MULTIDECADAL VARIABILITY - MECHANISMS AND PREDICTABILITY
NORTH ATLANTIC DECADAL-TO- MULTIDECADAL VARIABILITY - MECHANISMS AND PREDICTABILITY Noel Keenlyside Geophysical Institute, University of Bergen Jin Ba, Jennifer Mecking, and Nour-Eddine Omrani NTU International
(Manuscript received 6 May 2003; in final form 29 January 2004)
Tellus (24), 56A, 342 361 Copyright C Blackwell Munksgaard, 24 Printed in UK. All rights reserved TELLUS Transient response of the Atlantic Meridional Overturning Circulation to enhanced freshwater input
THE AMOC IN MILLENNIAL ECHO-G CLIMATE SIMULATIONS AND FUTURE CLIMATE CHANGE SCENARIOS
THE AMOC IN MILLENNIAL ECHO-G CLIMATE SIMULATIONS AND FUTURE CLIMATE CHANGE SCENARIOS Pablo Ortega, Marisa Montoya and Fidel González-Rouco PALMA Research Group Dpto. Astrofísica y Ciencias de la Atmósfera
Centennial-scale Climate Change from Decadally-paced Explosive Volcanism
Centennial-scale Climate Change from Decadally-paced Explosive Volcanism Yafang Zhong and Gifford Miller INSTAAR, University of Colorado at Boulder, USA Bette Otto-Bliesner, Caspar Ammann, Marika Holland,
Arne Biastoch Helmholtz Centre for Ocean Research Kiel. Modelling the Agulhas Current and its Coupling with the Atlantic Circulation
Arne Biastoch Helmholtz Centre for Ocean Research Kiel Modelling the Agulhas Current and its Coupling with the Atlantic Circulation The Agulhas System as a Key Region of the Global Oceanic Circulation
Climate sensitivity of coupled models with differing ocean components
Climate sensitivity of coupled models with differing ocean components Alex Megann, Adam Blaker and Adrian New National Oceanography Centre, Southampton, UK LOM Workshop, Miami, February 2011 Overview Introduction
How de-coupling cloud radiative feedbacks strengthens the AMOC
How de-coupling cloud radiative feedbacks strengthens the AMOC Elizabeth Maroon1, Eleanor Middlemas2, Jennifer Kay1, Brian Medeiros3 1CIRES, University of Colorado Boulder, 2University of Miami, 3National
Impact of the Melting of the Greenland Ice Sheet on the Atlantic Meridional Overturning Circulation in 21st Century Model Projections
Impact of the Melting of the Greenland Ice Sheet on the Atlantic Meridional Overturning Circulation in 21st Century Model Projections Item Type text; Electronic Thesis Authors Beadling, Rebecca Lynn Publisher
Challenges for Climate Science in the Arctic. Ralf Döscher Rossby Centre, SMHI, Sweden
Challenges for Climate Science in the Arctic Ralf Döscher Rossby Centre, SMHI, Sweden The Arctic is changing 1) Why is Arctic sea ice disappearing so rapidly? 2) What are the local and remote consequences?
The Arctic Ocean Climate a balance between local radiation, advected heat and freshwater
The Arctic Ocean Climate a balance between local radiation, advected heat and freshwater Bert Rudels Finnish Meteorological Institute, Helsinki, Finland French Arctic Initiative, Collège de France, Paris,
1 Introduction. Lei Yu 1,4 Yongqi Gao 2,4 Odd Helge Otterå 3
Clim Dyn DOI.7/s382-1-261-9 The sensitivity of the Atlantic meridional overturning circulation to enhanced freshwater discharge along the entire, eastern and western coast of Greenland Lei Yu 1, Yongqi
The transient response of the Atlantic Meridional Overturning. Circulation to enhanced freshwater input to the Nordic Seas-Arctic
The transient response of the Atlantic Meridional Overturning Circulation to enhanced freshwater input to the Nordic Seas-Arctic Ocean in the Bergen Climate Model Odd Helge Otterå 1,2,, Helge Drange 1,2,3,
The role of salinity in the decadal variability of the North Atlantic meridional overturning circulation
The role of salinity in the decadal variability of the North Atlantic meridional overturning circulation Claude Frankignoul LOCEAN / IPSL, Université Pierre et Marie Curie - Paris 6, case 100, 4 place
Anticipated changes in the Nordic Seas marine climate: Scenarios for 2020, 2050, and 2080.
Anticipated changes in the Nordic Seas marine climate: Scenarios for 2020, 2050, and 2080. By Tore Furevik 1, Helge Drange 2, and Asgeir Sorteberg 1,3 1 Geophysical Institute, University of Bergen 2 Nansen
IPCC AR5 WG1 - Climate Change 2013: The Physical Science Basis. Nandini Ramesh
IPCC AR5 WG1 - Climate Change 2013: The Physical Science Basis Nandini Ramesh Seminar in Atmospheric Science 21 st February, 2014 1. Introduc,on The ocean exchanges heat, freshwater, and C with the atmosphere.
Multi-decadal simulation of Atlantic Ocean climate variability driven by realistic high-frequency atmospheric reanalysis
Multi-decadal simulation of Atlantic Ocean climate variability driven by realistic high-frequency atmospheric reanalysis Z. Garraffo, G.Halliwell, L. Smith, G. Peng, E. Chassignet Discussions with B. Molinari,
Name Spin-up runs Flux Ocean Atmosphere adjustments CON-DEF O-DEF A-DEF O-DEF/A-DEF CON-SHF O-SHF A-SHF O-SHF/A-SHF CON-EFF O-EFF A-EFF O-EFF/A-EFF
Chapter 5 Control runs 5.1 Introduction Three coupled model control runs are presented in this chapter; these are summarised in Table 5.1. They differ from each another only in the initial states of the
Potential Impact of climate change and variability on the Intra-Americas Sea (IAS)
Potential Impact of climate change and variability on the Intra-Americas Sea (IAS) Sang-Ki Lee 1, Yanyun Liu 1 and Barbara Muhling 2 1 CIMAS-University of Miami and AOML-NOAA 2 Princeton University and
The role of sea-ice in extended range prediction of atmosphere and ocean
The role of sea-ice in extended range prediction of atmosphere and ocean Virginie Guemas with contributions from Matthieu Chevallier, Neven Fučkar, Agathe Germe, Torben Koenigk, Steffen Tietsche Workshop
Supplementary Figure 1 Trends of annual mean maximum ocean mixed layer depth. Trends from uninitialized simulations (a) and assimilation simulation
Supplementary Figure 1 Trends of annual mean maximum ocean mixed layer depth. Trends from uninitialized simulations (a) and assimilation simulation (b) from 1970-1995 (units: m yr -1 ). The dots show grids
Variability of Atlantic Ocean heat transport and its effects on the atmosphere
ANNALS OF GEOPHYSICS, VOL. 46, N., February 3 Variability of Atlantic Ocean heat transport and its effects on the atmosphere Buwen Dong and Rowan T. Sutton Centre for Global Atmospheric Modelling, Department
On Modeling the Oceanic Heat Fluxes from the North Pacific / Atlantic into the Arctic Ocean
On Modeling the Oceanic Heat Fluxes from the North Pacific / Atlantic into the Arctic Ocean Wieslaw Maslowski Naval Postgraduate School Collaborators: Jaclyn Clement Kinney Terry McNamara, John Whelan
Arctic North Atlantic Interactions and Multidecadal Variability of the Meridional Overturning Circulation
1OCTOBER 2005 JUNGCLAUS ET AL. 4013 Arctic North Atlantic Interactions and Multidecadal Variability of the Meridional Overturning Circulation JOHANN H. JUNGCLAUS AND HELMUTH HAAK Max Planck Institute for
GEOCHEMICAL TRACERS OF ARCTIC OCEAN CIRCULATION
GEOCHEMICAL TRACERS OF ARCTIC OCEAN CIRCULATION Earth Sciences Division Lawrence Berkeley National Laboratory Fresh Water Cycle Maintains Stratification of Upper Arctic Ocean Stably stratified surface
Agulhas Leakage in the CCSM4. Wilbert Weijer (LANL, Los Alamos) Erik van Sebille (UNSW, Sydney)
Agulhas Leakage in the CCSM4 Wilbert Weijer (LANL, Los Alamos) Erik van Sebille (UNSW, Sydney) Slide 1 Agulhas Leakage Exchange of water between South Indian and Atlantic Oceans Takes part in Supergyre
Effect of the large-scale atmospheric circulation on the variability of the Arctic Ocean freshwater export
Climate Dynamics - Preprint The original publication is available at www.springerlink.com doi:1.17/s382-9-558-z Effect of the large-scale atmospheric circulation on the variability of the Arctic Ocean
NW Atlantic warming under climate change: new simulations with high-resolution CESM
NW Atlantic warming under climate change: new simulations with high-resolution CESM Justin Small John Truesdale, Susan Bates, Gary Strand, Jerry Meehl, Don Wuebbles Acknowledging: Mike Alexander, Andrew
(c) (a) (d) (b) JJA DJF. V850 Hulu Cave. V850 Hulu Cave V1000 V1000. Dongge Cave. Dongge Cave. Lake Huguang Maar.
NCEP-DOE (1981-2010) TraCE21ka (a) (c) JJA Dongge Cave V850 Hulu Cave Dongge Cave V850 Hulu Cave (b) (d) DJF Lake Huguang Maar V1000 Lake Huguang Maar V1000 Supplementary Figure 1 Climatology of EASM and
Atlantic Multidecadal Oscillation as seen in models, observations and paleo data
WWW.BJERKNES.UIB.NO Atlantic Multidecadal Oscillation as seen in models, observations and paleo data Odd Helge Otterå, et al., oddho@nersc.no G.C. Rieber Climate Institute, NERSC, Bergen Bjerknes Centre
Volcanic impact on the Atlantic Ocean over the last millennium
Clim. Past, 7, 1439 1455, 211 www.clim-past.net/7/1439/211/ doi:1.5194/cp-7-1439-211 Author(s) 211. CC Attribution 3. License. Climate of the Past Volcanic impact on the Atlantic Ocean over the last millennium
The Arctic Energy Budget
The Arctic Energy Budget The global heat engine [courtesy Kevin Trenberth, NCAR]. Differential solar heating between low and high latitudes gives rise to a circulation of the atmosphere and ocean that
Near-term climate prediction: new opportunities and challenges
Near-term climate prediction: new opportunities and challenges Noel Keenlyside Geophysical Institute, University of Bergen Jin Ba, Jennifer Mecking, and Nour-Eddine Omrani Atlantic multi-decadal variability
Climate Change 2007: The Physical Science Basis
Climate Change 2007: The Physical Science Basis Working Group I Contribution to the IPCC Fourth Assessment Report Presented by R.K. Pachauri, IPCC Chair and Bubu Jallow, WG 1 Vice Chair Nairobi, 6 February
Lecture 1. Amplitude of the seasonal cycle in temperature
Lecture 6 Lecture 1 Ocean circulation Forcing and large-scale features Amplitude of the seasonal cycle in temperature 1 Atmosphere and ocean heat transport Trenberth and Caron (2001) False-colour satellite
On the Circulation of Atlantic Water in the Arctic Ocean
2352 J O U R N A L O F P H Y S I C A L O C E A N O G R A P H Y VOLUME 43 On the Circulation of Atlantic Water in the Arctic Ocean MICHAEL A. SPALL Woods Hole Oceanographic Institution, Woods Hole, Massachusetts
North Atlantic response to the above-normal export of sea ice from the Arctic
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, NO. C7, 3224, doi:10.1029/2001jc001166, 2003 North Atlantic response to the above-normal export of sea ice from the Arctic Oleg A. Saenko, Edward C. Wiebe, and
SUPPLEMENTARY INFORMATION
SUPPLEMENTARY INFORMATION DOI: 10.1038/NGEO1189 Different magnitudes of projected subsurface ocean warming around Greenland and Antarctica Jianjun Yin 1*, Jonathan T. Overpeck 1, Stephen M. Griffies 2,
LET NOT THAT ICE MELT IN SVALBARD S. RAJAN, INCOIS NEELU SINGH, NCAOR
LET NOT THAT ICE MELT IN SVALBARD S. RAJAN, INCOIS NEELU SINGH, NCAOR 1. Arctic (surface air) temperatures are rising twice as fast as the temperatures in the rest of the world (Amplification). The Arctic
Global Atmospheric Circulation
Global Atmospheric Circulation Polar Climatology & Climate Variability Lecture 11 Nov. 22, 2010 Global Atmospheric Circulation Global Atmospheric Circulation Global Atmospheric Circulation The Polar Vortex
ATOC OUR CHANGING ENVIRONMENT Class 19 (Chp 6) Objectives of Today s Class: The Cryosphere [1] Components, time scales; [2] Seasonal snow
![ATOC OUR CHANGING ENVIRONMENT Class 19 (Chp 6) Objectives of Today s Class: The Cryosphere [1] Components, time scales; [2] Seasonal snow](/thumbs/95/126309683.jpg "ATOC OUR CHANGING ENVIRONMENT Class 19 (Chp 6) Objectives of Today s Class: The Cryosphere [1] Components, time scales; [2] Seasonal snow")
ATOC 1060-002 OUR CHANGING ENVIRONMENT Class 19 (Chp 6) Objectives of Today s Class: The Cryosphere [1] Components, time scales; [2] Seasonal snow cover, permafrost, river and lake ice, ; [3]Glaciers and
Causes of Changes in Arctic Sea Ice
Causes of Changes in Arctic Sea Ice Wieslaw Maslowski Naval Postgraduate School Outline 1. Rationale 2. Observational background 3. Modeling insights on Arctic change Pacific / Atlantic Water inflow 4.
Vertical Coupling in Climate
Vertical Coupling in Climate Thomas Reichler (U. of Utah) NAM Polar cap averaged geopotential height anomalies height time Observations Reichler et al. (2012) SSWs seem to cluster Low-frequency power Vortex
Winter Forecast for GPC Tokyo. Shotaro TANAKA Tokyo Climate Center (TCC) Japan Meteorological Agency (JMA)
Winter Forecast for 2013 2014 GPC Tokyo Shotaro TANAKA Tokyo Climate Center (TCC) Japan Meteorological Agency (JMA) NEACOF 5, October 29 November 1, 2013 1 Outline 1. Numerical prediction 2. Interannual
Arctic decadal and interdecadal variability
Arctic decadal and interdecadal variability Igor V. Polyakov International Arctic Research Center, University of Alaska Fairbanks Mark A. Johnson Institute of Marine Science, University of Alaska Fairbanks
Impact of atmospheric CO 2 doubling on the North Pacific Subtropical Mode Water
GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L06602, doi:10.1029/2008gl037075, 2009 Impact of atmospheric CO 2 doubling on the North Pacific Subtropical Mode Water Hyun-Chul Lee 1,2 Received 19 December 2008;
Continental Hydrology, Rapid Climate Change, and the Intensity of the Atlantic MOC: Insights from Paleoclimatology
Continental Hydrology, Rapid Climate Change, and the Intensity of the Atlantic MOC: Insights from Paleoclimatology W.R. Peltier Department of Physics University of Toronto WOCE derived N-S salinity section
Supporting Information for Glacial Atlantic overturning increased by wind stress in climate models
GEOPHYSICAL RESEARCH LETTERS Supporting Information for Glacial Atlantic overturning increased by wind stress in climate models Juan Muglia 1 and Andreas Schmittner 1 Contents of this file 1. Figures S1
The Agulhas Current system: its dynamics and climatic importance
The Agulhas Current system: its dynamics and climatic importance BJØRN BACKEBERG 1 NANSEN-TUTU CENTRE FOR MARINE ENVIRONMENTAL RESEARCH 2 DEPTARTMENT OF OCEANOGRAPHY, UNIVERSITY OF CAPE TOWN Nansen Centers
Observed rate of loss of Arctic ice extent is faster than IPCC AR4 predictions
When will Summer Arctic Sea Ice Disappear? Wieslaw Maslowski Naval Postgraduate School Collaborators: Jaclyn Clement Kinney, Andrew Miller, Terry McNamara, John Whelan - Naval Postgraduate School Jay Zwally
Rapid Climate Change: Heinrich/Bolling- Allerod Events and the Thermohaline Circulation. By: Andy Lesage April 13, 2010 Atmos.
Rapid Climate Change: Heinrich/Bolling- Allerod Events and the Thermohaline Circulation By: Andy Lesage April 13, 2010 Atmos. 6030 Outline Background Heinrich Event I/Bolling-Allerod Transition (Liu et
Response of Thermohaline Circulation to Freshwater. Forcing under Present Day and LGM Conditions
Response of Thermohaline Circulation to Freshwater Forcing under Present Day and LGM Conditions Aixue Hu 1, Bette L. Otto-Bliesner 1, Gerald A. Meehl 1, Weiqing Han 2, Carrie Morrill 3, Esther C. Brady
Ocean Mixing and Climate Change
Ocean Mixing and Climate Change Factors inducing seawater mixing Different densities Wind stirring Internal waves breaking Tidal Bottom topography Biogenic Mixing (??) In general, any motion favoring turbulent
An Introduction to Coupled Models of the Atmosphere Ocean System
An Introduction to Coupled Models of the Atmosphere Ocean System Jonathon S. Wright jswright@tsinghua.edu.cn Atmosphere Ocean Coupling 1. Important to climate on a wide range of time scales Diurnal to
Response of the Atlantic Thermohaline Circulation to Increased Atmospheric CO 2 in a Coupled Model
4267 Response of the Atlantic Thermohaline Circulation to Increased Atmospheric CO 2 in a Coupled Model AIXUE HU, GERALD A. MEEHL, WARREN M. WASHINGTON, AND AIGUO DAI National Center for Atmospheric Research,*
Using Arctic Ocean Color Data in ocean-sea ice-biogeochemistry seasonal forecasting systems
Using Arctic Ocean Color Data in ocean-sea ice-biogeochemistry seasonal forecasting systems Matthieu Chevallier 1 The POLARIS project David Salas y Mélia 1, Roland Séférian 1, Marion Gehlen 2, Gilles Garric
Land Bridge for migration of mammals and people? Arctic Change Woodgate Paleo role of Bering Strait
Paleo role of Bering Strait Stabilizer for World Climate? (DeBoer & Nof, 2004) - if Bering Strait is open, excess freshwater in the Atlantic (from, for example, ice sheet collapse) can vent through the
Present day natural processes in the Russian Arctic and prospects of the Northern sea route use
Present day natural processes in the Russian Arctic and prospects of the Northern sea route use Vjacheslav M. Makeev The State Polar Academy Saint-Petersburg, Russia Temporal rows of annual air temperature
CMIP3/CMIP5 differences: Scenario (SRESA1B vs RCP4.5) Ensemble mean Tas responses: CMIP3 = 2.8 K CMIP5 = 1.9 K CMIP5 higher average resolution
CMIP3/CMIP5 differences: Scenario (SRESA1B vs RCP4.5) Ensemble mean Tas responses: CMIP3 = 2.8 K CMIP5 = 1.9 K CMIP5 higher average resolution Several `high-top models in CMIP5 Key question What are
Распространение плотных придонных
Распространение плотных придонных вод на шельфе Арктических морей Dense bottom water transport over the shelf of Arctic seas Платов Г. А. (Platov G. A.) ИВМиМГ СОРАН, Новосибирск ICMMG, Novosibirsk Problems
Advancing decadal-scale climate prediction in the North Atlantic Sector Noel Keenlyside
Advancing decadal-scale climate prediction in the North Atlantic Sector Noel Keenlyside M. Latif, J. Jungclaus, L. Kornblueh, E. Roeckner, V. Semenov & W. Park IPCC, 2007 How warm will be the next decade?
Size matters: another reason why the Atlantic is saltier than the Pacific C.S. Jones and Paola Cessi
Size matters: another reason why the Atlantic is saltier than the Pacific C.S. Jones and Paola Cessi Scripps Institution of Oceanography University of California, San Diego Proposed reasons for Atlantic
SIO 210 Final examination Answer Key for all questions except Daisyworld. Wednesday, December 10, PM Name:
SIO 210 Final examination Answer Key for all questions except Daisyworld. Wednesday, December 10, 2008 3-6 PM Name: This is a closed book exam. You may use a calculator. There are two parts: Talley (weighted
Early warning of climate tipping points Tim Lenton
Early warning of climate tipping points Tim Lenton With thanks to John Schellnhuber, Valerie Livina, Vasilis Dakos, Marten Scheffer Outline Tipping elements Early warning methods Tests and application
Project of Strategic Interest NEXTDATA. Deliverables D1.3.B and 1.3.C. Final Report on the quality of Reconstruction/Reanalysis products
Project of Strategic Interest NEXTDATA Deliverables D1.3.B and 1.3.C Final Report on the quality of Reconstruction/Reanalysis products WP Coordinator: Nadia Pinardi INGV, Bologna Deliverable authors Claudia
Variability of the Atlantic Meridional Overturning Circulation (AMOC)
Variability of the Atlantic Meridional Overturning Circulation (AMOC) Rowan Sutton Director of Climate Research UK National Centre for Atmospheric Science (NCAS) Department of Meteorology University of
A Synthesis of Results from the Norwegian ESSAS (N-ESSAS) Project
A Synthesis of Results from the Norwegian ESSAS (N-ESSAS) Project Ken Drinkwater Institute of Marine Research Bergen, Norway ken.drinkwater@imr.no ESSAS has several formally recognized national research
APPENDIX B PHYSICAL BASELINE STUDY: NORTHEAST BAFFIN BAY 1
APPENDIX B PHYSICAL BASELINE STUDY: NORTHEAST BAFFIN BAY 1 1 By David B. Fissel, Mar Martínez de Saavedra Álvarez, and Randy C. Kerr, ASL Environmental Sciences Inc. (Feb. 2012) West Greenland Seismic
Atmosphere-ocean interactions and dynamic response of the Southern Ocean to climate variability and trends. Mike Meredith BAS, Cambridge, UK
Atmosphere-ocean interactions and dynamic response of the Southern Ocean to climate variability and trends. Mike Meredith BAS, Cambridge, UK Structure Preliminary random thoughts Brief examples demonstrating
Arctic sea ice in IPCC climate scenarios in view of the 2007 record low sea ice event A comment by Ralf Döscher, Michael Karcher and Frank Kauker
Arctic sea ice in IPCC climate scenarios in view of the 2007 record low sea ice event A comment by Ralf Döscher, Michael Karcher and Frank Kauker Fig. 1: Arctic September sea ice extent in observations
Outline: 1) Extremes were triggered by anomalous synoptic patterns 2) Cloud-Radiation-PWV positive feedback on 2007 low SIE
Identifying Dynamical Forcing and Cloud-Radiative Feedbacks Critical to the Formation of Extreme Arctic Sea-Ice Extent in the Summers of 2007 and 1996 Xiquan Dong University of North Dakota Outline: 1)
Fast and Slow Response of Sea ice and the Southern Ocean to Ozone Depletion
Fast and Slow Response of Sea ice and the Southern Ocean to Ozone Depletion Annual Minimum Sea ice extent 1979-2013 10 6 km 2 Arctic September Antarctic February Data from in passive microwave satellite
LETTERS. Tropical Stabilization of the Thermohaline Circulation in a Greenhouse Warming Simulation
VOLUME 13 JOURNAL OF CLIMATE 1JUNE 2000 LETTERS Tropical Stabilization of the Thermohaline Circulation in a Greenhouse Warming Simulation M. LATIF, E.ROECKNER, U.MIKOLAJEWICZ, AND R. VOSS Max-Planck-Institut
A tracer study of the Arctic Ocean s liquid freshwater export variability
JOURNAL OF GEOPHYSICAL RESEARCH, VOL.???, XXXX, DOI:10.1029/, Alexandra Jahn 1, 2, L. Bruno Tremblay 1, 3, Robert Newton 3, Marika M. Holland 4, Lawrence A. Mysak 1, Igor A. Dmitrenko 5 A tracer study
Multi-century climate integrations at NOC
Multi-century climate integrations at NOC Alex Megann, Adam Blaker and Adrian New Marine Systems Modelling National Oceanography Centre, Southampton, UK LOM, Ann Arbor, May 2013 Multi-century climate integrations
Variability of the Northern Annular Mode s signature in winter sea ice concentration
Variability of the Northern Annular Mode s signature in winter sea ice concentration Gerd Krahmann & Martin Visbeck Historical winter sea ice concentration data are used to examine the relation between
Stability of Antarctic Bottom Water Formation to Freshwater Fluxes and Implications for Global Climate
3310 J O U R N A L O F C L I M A T E VOLUME 21 Stability of Antarctic Bottom Water Formation to Freshwater Fluxes and Implications for Global Climate JESSICA TREVENA, WILLEM P. SIJP, AND MATTHEW H. ENGLAND
DATA REQUIREMENTS FOR DECADAL-TO-CENTENNIAL CLIMATE VARIABILITY STUDIES AND COUPLED MODELS. MPI, Hamburg, Germany 2. NASA/GSFC, Goddard Md USA
DATA REQUIREMENTS FOR DECADAL-TO-CENTENNIAL CLIMATE VARIABILITY STUDIES AND COUPLED MODELS M. Latif 1, V. Mehta 2 and co-authors * 1 MPI, Hamburg, Germany 2 NASA/GSFC, Goddard Md USA 1 - INTRODUCTION The
THE RELATION AMONG SEA ICE, SURFACE TEMPERATURE, AND ATMOSPHERIC CIRCULATION IN SIMULATIONS OF FUTURE CLIMATE
THE RELATION AMONG SEA ICE, SURFACE TEMPERATURE, AND ATMOSPHERIC CIRCULATION IN SIMULATIONS OF FUTURE CLIMATE Bitz, C. M., Polar Science Center, University of Washington, U.S.A. Introduction Observations
Supplemental Material for Evolution of the Atlantic Multidecadal. Variability in a model with an improved North Atlantic Current
1 Supplemental Material for Evolution of the Atlantic Multidecadal 2 Variability in a model with an improved North Atlantic Current 3 Annika Drews 4 GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel,
New perspectives of climate change impacts on marine anthropogenic radioactivity in Arctic regions
New perspectives of climate change impacts on marine anthropogenic radioactivity in Arctic regions M. Karcher 1,3, I. Harms 2, R. Gerdes 3, W.J.F. Standring 4, M. Dowdall 4, P. Strand 4 1 O.A.Sys Ocean
The forcings and feedbacks of rapid Arctic sea ice loss
The forcings and feedbacks of rapid Arctic sea ice loss Marika Holland, NCAR With: C. Bitz (U.WA), B. Tremblay (McGill), D. Bailey (NCAR), J. Stroeve (NSIDC), M. Serreze (NSIDC), D. Lawrence (NCAR), S
Steven Feldstein. The link between tropical convection and the Arctic warming on intraseaonal and interdecadal time scales
The link between tropical convection and the Arctic warming on intraseaonal and interdecadal time scales Steven Feldstein The Pennsylvania State University Collaborators: Sukyoung Lee, Hyoseok Park, Tingting
Tropical Cyclones - Ocean feedbacks: Effects on the Ocean Heat Transport as simulated by a High Resolution Coupled General Circulation Model
ISTITUTO NAZIONALE di GEOFISICA e VULCANOLOGIA Tropical Cyclones - Ocean feedbacks: Effects on the Ocean Heat Transport as simulated by a High Resolution Coupled General Circulation Model E. Scoccimarro
Estimate for sea ice extent for September, 2009 is comparable to the 2008 minimum in sea ice extent, or ~ km 2.
September 2009 Sea Ice Outlook: July Report By: Jennifer V. Lukovich and David G. Barber Centre for Earth Observation Science (CEOS) University of Manitoba Estimate for sea ice extent for September, 2009
Comparison of the Siberian shelf seas in the Arctic Ocean
Comparison of the Siberian shelf seas in the Arctic Ocean by Audun Scheide & Marit Muren SIO 210 - Introduction to Physical Oceanography November 2014 Acknowledgements Special thanks to James Swift for
Arctic climate projections and progress towards a new CCSM. Marika Holland NCAR
Arctic climate projections and progress towards a new CCSM Marika Holland NCAR The Arctic is changing! Loss of Sept Arctic Sea Ice 2002 Loss of about 8% per decade Or >20% since 1979 (Courtesy I. Rigor
Ice sheet freshwater forcing
Jan Lenaerts Utrecht University University of Colorado Ice sheet freshwater forcing Photo: Reijmer, 2011 Sea level meeting 5 to ~6 pm, South Bay Goal: Sea level rise and its impacts on coastal populations
Uncertainty in Ocean Surface Winds over the Nordic Seas
Uncertainty in Ocean Surface Winds over the Nordic Seas Dmitry Dukhovskoy and Mark Bourassa Arctic Ocean Center for Ocean-Atmospheric Prediction Studies Florida State University Funded by the NASA OVWST,
Recent Changes in Arctic Sea Ice: The Interplay between Ice Dynamics and Thermodynamics
1SEPTEMBER 2000 ZHANG ET AL. 3099 Recent Changes in Arctic Sea Ice: The Interplay between Ice Dynamics and Thermodynamics JINLUN ZHANG, DREW ROTHROCK, AND MICHAEL STEELE Polar Science Center, Applied Physics
Transient response of the MOC and climate to potential melting of the Greenland Ice Sheet in the 21st century
Click Here for Full Article GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L10707, doi:10.1029/2009gl037998, 2009 Transient response of the MOC and climate to potential melting of the Greenland Ice Sheet in the
Bering Strait, AMOC hysteresis, and abrupt climate change
DOE/UCAR Cooperative Agreement Regional and Global Climate Modeling Program Bering Strait, AMOC hysteresis, and abrupt climate change Aixue Hu Gerald A. Meehl, Weiqing Han, Axel Timmerman, Bette Otto-Bliester,
Coordinated Ocean-ice Reference Experiments phase II (CORE-II)
Coordinated Ocean-ice Reference Experiments phase II (CORE-II) Gokhan Danabasoglu, Stephen G. Yeager, William G. Large National Center for Atmospheric Research, Boulder, CO, USA Stephen M. Griffies NOAA
Abstract Mechanisms of the internally generated decadal-to-multidecadal. variability of SST in the Atlantic Ocean in a coupled GCM
Clim Dyn DOI 10.1007/s00382-015-2660-8 Mechanisms of internally generated decadal to multidecadal variability of SST in the Atlantic Ocean in a coupled GCM Hua Chen 1 Edwin K. Schneider 2,3 Zhiwei Wu 1