Differences from CERES EBAF
|
|
- Annabelle Strickland
- 5 years ago
- Views:
Transcription
1 Summary of Session 3 (16 talks) A. Protat, S. Siems, R. Marchand Talk 1: Kalli Furtado (UKMO) SO SST bias linked to lack of SLW clouds in the UM model Developed a new parameterization using turbulence to generate mixed-phase clouds Used LES to test the parameterization : works well Implemented in GCM 4 Wm -2 reduction of SW Differences from CERES EBAF
2 Talk 2: Erica Dolinar (North Dakota) Compared cloud fraction, cloud water path, w, TOA radiative fluxes (30S-70S ) from AMIP simulations ( ), 28 models ensemble mean and spread NASA products (CloudSat, CALIPSO, CERES, MODIS) & MERRA analyses GCMs underestimate cloud fraction by 12 % (worst for 30s-45S and for low-levels), CWP by 56 gm -2 (worst in the 45S-60S), general patterns of vertical velocity OK but differences in subsidence region. The magnitude of TOA SW (LW) CRF cooling (warming) is underestimated. Not consistent with CF and CWP results
3 Talk 3: Ryan Stanfield (North Dakota) Assessment of NASA GISS CMIP5 and post-cmip5 clouds and TOA radiation using satellite data (A-Train). Changed cumulus & BL turbulence params general improvement over SO but new version probably overestimating low cloud cover. NEW OLD
4 Talk 4: Paulo Ceppi (Washington) Analyzed in detail the causal relationship between SW radiation changes, SST, and midlatitude jet shift. A very nice correlation is found between change in ASR gradient and change in SST gradient. Also between change in ASR gradient and poleward jet shift 1 2 cloud response SST anomalies jet shift jet shift cloud shift SST anomalies Spread in ASR response due to model-dependent sensitivity to SST warming Minor role played by poleward shift
5 Talk 5: Ying Li (CSU) Studied the instantaneous linkage between cloud vertical structure and 6 LS params Uses 2B-GEOPROF-LIDAR and ECMWF-AUX This provides a very nice framework to evaluate GCMs. We should consider it together with the ISCCP regime or other state-classifications. Maximum at low LTS e.g., stratus associated with extratropical synoptic storms) Height (km) Maximum at high LTS e.g., stratocumulus clouds Dual maxima: different types of clouds throughout the mid/high latitude
6 Talk 6: Roj Marchand (U. Washington) Recent changes in SO cloud fraction using CTH-OD diagrams. No signature on global total cloud fraction but clear reduction in CF for clouds with OD > 23. Our SOCRATES area is spot on. Not due to a change in LS atmospheric state but a change in cloud properties within states with regions of low pressure. Change is largest in winter, and it was suggested that experimental goals need to include sampling winter and summer seasons.
7 Talk 7: Daniel McCoy (U. Washington) Studied the effect of cloud properties on upwelling SW radiation with special attention on the increase in SW from transition from ice to liquid transition Summertime : peak in low CF and reduced Reff. Seasonal cycle of phase. Radiative transfer calculations changing cloud microphysics parameters individually show the respective contributions to upwelling SW (CF and Reff both contribute). Ice to liquid transition over the seasons strongly affect the upwelling SW but magnitude highly varies with assumed microphysics Take home : better understanding of cloud microphysical processes is needed to better constrain the optical depth feedback.
8 Talk 8: Jay Mace (U. Utah) Studied the microphysical properties of marine low clouds, precipitation susceptibility, and the variability due to environmental factors. Also gave a word of caution about the use of ISCCP regimes. The co-dependence of albedo susceptibility and precip susceptibility shows large variability between summer and winter. Both seasons should be sampled
9 Talk 9: Steve Siems (Monash) Analyzed the BL structure and precip properties from soundings at Macquarie Island Met. Records are available since There is a clear problem with ERA-Interim winds below 500 m height. Reports a 35% increase in precip between 1970 and 2008 (wintertime) and surface wind increase by 3 cm/s a year since Identified the buffer layer on Macquarie soundings. Not present on YOTC analyses (too smooth).
10 Talk 10: Adrian McDonald (U. Canterbury, NZ) Presented the main objectives of research in NZ under the Deep South National challenge. A major priority will be the polar influences on the westerlies which are a main driver for weather over NZ. Strong climate modelling and atmospheric remote sensing activities planned. Auckland Island sites will be instrumented. Many people (including me!) discovered the potential of WindSat for these studies (launched in 2003, provides a host of products). Studied the impact of SAM on properties measured by WindSat. Zonal wind (m/s) Meridional wind (m/s) SST(K) TCWV (%) Cloud Liquid water (%) Rain rate (%)
11 Talk 11: Kalli Furtado (UKMO) Highlights a problem with low stratiform clouds in cold air outbreaks of the NH. Even when using high-resolution (km scale) model. Research aircraft flights have been performed to better understand this problem. Significant underestimate in surface moisture flux due to enhanced water vapour in the model near the surface has been found. Building a comprehensive database. A similar problem is expected over the Southern Ocean (?). Satellite Control model Modified model
12 Talk 12: Tom Lachlan-Cope (British Antarctic Survey) Described the Meteorological Airborne Science INstrumentation (MASIN). Twin Otter equipped for sea ice, clouds, aerosols, radiation. 150 flight hours done. Found that models do not reproduce the energy balance very well. Documented the average droplet number concentration on both sides of the peninsula. (unexpected?) Discussed upcoming activtiteis with aircraft and surface measurements and plans to support ACRE AWS AMPS UM
13 Talk 13: Simon Alexander (AAD) Described the ACRE proposal to be submitted to AAD call for science proposal. 1 year deployments of a comprehensive suite of clouds, aerosol, precipitation and radiation measurements at Macquarie Island (54S) and Davis (69S). Objectives are to characterize cloud and aerosol properties and their modes of variability, evaluate satellite products, and model simulations (climate to highresolution).
14 Talk 14: Scott Collis (ANL) Shared his expertise and gave recommendations on C-band Doppler radar data processing. Described some of the algorithms they have recently developed / implemented. Recommended recording spectra to help filter out (sea-ice) clutter. Slow antenna rotation for good data quality. Recommends the use of Kdp attenuation then rain rate from attenuation. Demonstrated a technique to get at the number of rain features exceeding rain rate threshold and use that for model evaluation.
15 Talk 15: Jeff Stith (NCAR) Described the NCAR aircraft characteristics and instrumentation (C130 and G-V). Also showed impressive results with a new cloud probe called HOLODEC-II. Presented CESM modelling evaluation using the HIPPO flights. We want these aircraft ;-)
16 Talk 16: Gijs De Boers (U. Colorado / NOAA) Described the UAS developments. Advantages of such platforms are enhanced profiles, the characterization of the spatial variability, and sampling over water. Prices range from 1000 to about 5000 US$ (almost expendable). Currently instrumented for P, T, RH, winds, aerosol SD. Working on cloud microphysics and atmospheric radiation. Main risks for deployments over the SO are high winds, icing, wildlife. We want these aircraft too ;-)
Evaluation of CMIP5 Simulated Clouds and TOA Radiation Budgets in the SMLs Using NASA Satellite Observations
Evaluation of CMIP5 Simulated Clouds and TOA Radiation Budgets in the SMLs Using NASA Satellite Observations Erica K. Dolinar Xiquan Dong and Baike Xi University of North Dakota This talk is based on Dolinar
More informationExtratropical and Polar Cloud Systems
Extratropical and Polar Cloud Systems Gunilla Svensson Department of Meteorology & Bolin Centre for Climate Research George Tselioudis Extratropical and Polar Cloud Systems Lecture 1 Extratropical cyclones
More informationMeasurements are infrequent in this region due to difficulty in making both ship- and air-based measurements Natural pristine region far removed from
PLANNED OBSERVATIONAL CAMPAIGNS OVER THE SOUTHERN OCEANS FOR DETERMINING THE ROLES OF CLOUDS, AEROSOLS AND RADIATION IN THE CLIMATE SYSTEM: SOCRATES, MARCUS & MICRE G. McFarquhar, U. Illinois C. Bretherton,
More informationObserved Southern Ocean Cloud Properties and Shortwave Reflection
Observed Southern Ocean Cloud Properties and Shortwave Reflection Daniel T McCoy* 1, Dennis L Hartmann 1, and Daniel P Grosvenor 2 University of Washington 1 University of Leeds 2 *dtmccoy@atmosuwedu Introduction
More informationAn Interconnected Planet
An Interconnected Planet How Clouds, Aerosols, and the Ocean Cause Distant Rainfall Anomalies Dargan M. W. Frierson University of Washington CESM Workshop, 6-15-15 New Connections Recent research has uncovered
More informationA perturbed physics ensemble climate modeling. requirements of energy and water cycle. Yong Hu and Bruce Wielicki
A perturbed physics ensemble climate modeling study for defining satellite measurement requirements of energy and water cycle Yong Hu and Bruce Wielicki Motivation 1. Uncertainty of climate sensitivity
More informationGlobal sea surface temperature October 25 th 2007
The VOCALS Regional Experiment Aerosols, clouds, and precipitation in southeast Pacific stratocumulus Robert Wood Atmospheric Sciences University of Washington Global sea surface temperature October 25
More informationArctic Climate Change. Glen Lesins Department of Physics and Atmospheric Science Dalhousie University Create Summer School, Alliston, July 2013
Arctic Climate Change Glen Lesins Department of Physics and Atmospheric Science Dalhousie University Create Summer School, Alliston, July 2013 When was this published? Observational Evidence for Arctic
More informationArctic System Reanalysis Provides Highresolution Accuracy for Arctic Studies
Arctic System Reanalysis Provides Highresolution Accuracy for Arctic Studies David H. Bromwich, Aaron Wilson, Lesheng Bai, Zhiquan Liu POLAR2018 Davos, Switzerland Arctic System Reanalysis Regional reanalysis
More informationSaharan Dust Induced Radiation-Cloud-Precipitation-Dynamics Interactions
Saharan Dust Induced Radiation-Cloud-Precipitation-Dynamics Interactions William K. M. Lau NASA/GSFC Co-authors: K. M. Kim, M. Chin, P. Colarco, A. DaSilva Atmospheric loading of Saharan dust Annual emission
More informationPolar Weather Prediction
Polar Weather Prediction David H. Bromwich Session V YOPP Modelling Component Tuesday 14 July 2015 A special thanks to the following contributors: Kevin W. Manning, Jordan G. Powers, Keith M. Hines, Dan
More informationThe influence of fixing the Southern Ocean shortwave radiation model bias on global energy budgets and circulation patterns
The influence of fixing the Southern Ocean shortwave radiation model bias on global energy budgets and circulation patterns Jennifer Kay, Vineel Yettella (CU-Boulder) Brian Medeiros, Cecile Hannay (NCAR)
More informationClouds in the Climate System: Why is this such a difficult problem, and where do we go from here?
Clouds in the Climate System: Why is this such a difficult problem, and where do we go from here? Joel Norris Scripps Institution of Oceanography CERES Science Team Meeting April 29, 2009 Collaborators
More informationEvaluating parameterized variables in the Community Atmospheric Model along the GCSS Pacific cross-section
Evaluating parameterized variables in the Community Atmospheric Model along the GCSS Pacific cross-section Cécile Hannay, Dave Williamson, Rich Neale, Jerry Olson, Dennis Shea National Center for Atmospheric
More informationCharacterizing Clouds and Convection Associated with the MJO Using the Year of Tropical Convection (YOTC) Collocated A-Train and ECMWF Data Set
Characterizing Clouds and Convection Associated with the MJO Using the Year of Tropical Convection (YOTC) Collocated A-Train and ECMWF Data Set Wei-Ting Chen Department of Atmospheric Sciences, National
More informationThe Regional Arctic System Model (RASM) for Studying High Resolution Climate Changes in the Arctic
The Regional Arctic System Model (RASM) for Studying High Resolution Climate Changes in the Arctic Mark W. Seefeldt, John J. Cassano, Alice K. Duvivier, and Mimi H. Hughes University of Colorado Boulder
More informationNew Insights into the January 2016 West Antarctic Melt Event from the AWARE Campaign and Climate Model Simulations
New Insights into the January 2016 West Antarctic Melt Event from the AWARE Campaign and Climate Model Simulations Julien P. Nicolas 1, Andrew M. Vogelmann 2, Ryan C. Scott 3, Aaron B. Wilson 1, Maria
More informationModeling Challenges At High Latitudes. Judith Curry Georgia Institute of Technology
Modeling Challenges At High Latitudes Judith Curry Georgia Institute of Technology Physical Process Parameterizations Radiative transfer Surface turbulent fluxes Cloudy boundary layer Cloud microphysics
More informationWhat you need to know in Ch. 12. Lecture Ch. 12. Atmospheric Heat Engine
Lecture Ch. 12 Review of simplified climate model Revisiting: Kiehl and Trenberth Overview of atmospheric heat engine Current research on clouds-climate Curry and Webster, Ch. 12 For Wednesday: Read Ch.
More informationThe ozone hole indirect effect: Cloud-radiative anomalies accompanying the poleward shift of the eddy-driven jet in the Southern Hemisphere
GEOPHYSICAL RESEARCH LETTERS, VOL. 4, 388 392, doi:1.12/grl.575, 213 The ozone hole indirect effect: Cloud-radiative anomalies accompanying the poleward shift of the eddy-driven jet in the Southern Hemisphere
More informationOceanic Eddies in the VOCALS Region of the Southeast Pacific Ocean
Oceanic Eddies in the VOCALS Region of the Southeast Pacific Ocean Outline: Overview of VOCALS Dudley B. Chelton Oregon State University Overview of the oceanographic component of VOCALS Preliminary analysis
More informationSatellite-based estimate of global aerosol-cloud radiative forcing by marine warm clouds
SUPPLEMENTARY INFORMATION DOI: 10.1038/NGEO2214 Satellite-based estimate of global aerosol-cloud radiative forcing by marine warm clouds Y.-C. Chen, M. W. Christensen, G. L. Stephens, and J. H. Seinfeld
More informationP R O L O G U E CORRELATION COEF. dsst/dt during wintertime (i.e., end of Feb. minus beginning of Dec, using 11-day averaged climatology)
P R O L O G U E dsst/dt during wintertime (i.e., end of Feb. minus beginning of Dec, using 11-day averaged climatology) Correlation between total precipitable water (from NVAP-M) and total cloud (from
More informationIn Situ Comparisons with the Cloud Radar Retrievals of Stratus Cloud Effective Radius
In Situ Comparisons with the Cloud Radar Retrievals of Stratus Cloud Effective Radius A. S. Frisch and G. Feingold Cooperative Institute for Research in the Atmosphere National Oceanic and Atmospheric
More informationLecture 14. Marine and cloud-topped boundary layers Marine Boundary Layers (Garratt 6.3) Marine boundary layers typically differ from BLs over land
Lecture 14. Marine and cloud-topped boundary layers Marine Boundary Layers (Garratt 6.3) Marine boundary layers typically differ from BLs over land surfaces in the following ways: (a) Near surface air
More informationInfluence of Clouds and Aerosols on the Earth s Radiation Budget Using Clouds and the Earth s Radiant Energy System (CERES) Measurements
Influence of Clouds and Aerosols on the Earth s Radiation Budget Using Clouds and the Earth s Radiant Energy System (CERES) Measurements Norman G. Loeb Hampton University/NASA Langley Research Center Bruce
More informationChanges in Cloud Cover and Cloud Types Over the Ocean from Surface Observations, Ryan Eastman Stephen G. Warren Carole J.
Changes in Cloud Cover and Cloud Types Over the Ocean from Surface Observations, 1954-2008 Ryan Eastman Stephen G. Warren Carole J. Hahn Clouds Over the Ocean The ocean is cloudy, more-so than land Cloud
More informationMet Office and UK University contribution to YMC Ground instrumentation and modelling
Met Office and UK University contribution to YMC Ground instrumentation and modelling Cathryn Birch 1,2 Adrian Matthews 3, Steve Woolnough 4, John Marsham 2, Douglas Parker 2, Paul Barret 1, Prince Xavier
More informationIce clouds observed by passive remote sensing :
Ice clouds observed by passive remote sensing : What did we learn from the GEWEX Cloud Assessment? Claudia Stubenrauch Laboratoire de Météorologie Dynamique, IPSL/CNRS, France Clouds are extended objects
More informationInfluence of clouds on radiative fluxes in the Arctic. J. English, J. Kay, A. Gettelman CESM Workshop / PCWG Meeting June 20, 2012
Influence of clouds on radiative fluxes in the Arctic J. English, J. Kay, A. Gettelman CESM Workshop / PCWG Meeting June 20, 2012 The complexity of arctic clouds Arctic Mixed-Phase Clouds Morrison et al.,
More informationImpacts of historical ozone changes on climate in GFDL-CM3
Impacts of historical ozone changes on climate in GFDL-CM3 Larry Horowitz (GFDL) with: Vaishali Naik (GFDL), Pu Lin (CICS), and M. Daniel Schwarzkopf (GFDL) WMO (2014) Figure ADM 5-1 1 Response of tropospheric
More informationOn the Limitations of Satellite Passive Measurements for Climate Process Studies
On the Limitations of Satellite Passive Measurements for Climate Process Studies Steve Cooper 1, Jay Mace 1, Tristan L Ecuyer 2, Matthew Lebsock 3 1 University of Utah, Atmospheric Sciences 2 University
More informationHow Will Low Clouds Respond to Global Warming?
How Will Low Clouds Respond to Global Warming? By Axel Lauer & Kevin Hamilton CCSM3 UKMO HadCM3 UKMO HadGEM1 iram 2 ECHAM5/MPI OM 3 MIROC3.2(hires) 25 IPSL CM4 5 INM CM3. 4 FGOALS g1. 7 GISS ER 6 GISS
More informationWarm rain variability and its association with cloud mesoscalestructure t and cloudiness transitions. Photo: Mingxi Zhang
Warm rain variability and its association with cloud mesoscalestructure t and cloudiness transitions Robert Wood, Universityof Washington with help and data from Louise Leahy (UW), Matt Lebsock (JPL),
More informationNSF 2005 CPT Report. Jeffrey T. Kiehl & Cecile Hannay
NSF 2005 CPT Report Jeffrey T. Kiehl & Cecile Hannay Introduction: The focus of our research is on the role of low tropical clouds in affecting climate sensitivity. Comparison of climate simulations between
More informationExploration of California High Resolution Snowpack Modeling with Realistic Surface-Atmospheric Radiation Physics
Exploration of California High Resolution Snowpack Modeling with Realistic Surface-Atmospheric Radiation Physics Chaincy Kuo, Alan Rhoades, Daniel Feldman Lawrence Berkeley National Laboratory AMS 15th
More informationEPIC2001 was conceived as an intensive process study along and near 95 o W during September and October 2001 used to make measurements of the atmosphe
EPIC2001 was conceived as an intensive process study along and near 95 o W during September and October 2001 used to make measurements of the atmosphere and ocean in this region. Two aircraft, the National
More informationPolar Boundary Layer Process & MOSAiC
Polar Boundary Layer Process & MOSAiC Ian Brooks Tjernstrom et al. 2005 ARCMIP model temperature biases (black = autumn, grey = winter, black-dash = spring, grey-dash = summer) Boundary Layer Issues Stable
More informationAn Introduction to Climate Modeling
An Introduction to Climate Modeling A. Gettelman & J. J. Hack National Center for Atmospheric Research Boulder, Colorado USA Outline What is Climate & why do we care Hierarchy of atmospheric modeling strategies
More informationInterhemispheric climate connections: What can the atmosphere do?
Interhemispheric climate connections: What can the atmosphere do? Raymond T. Pierrehumbert The University of Chicago 1 Uncertain feedbacks plague estimates of climate sensitivity 2 Water Vapor Models agree
More informationCloud Occurrence from the level 2B CloudSat- CALIPSO Cloud Mask Data
Cloud Occurrence from the level 2B CloudSat- CALIPSO Cloud Mask Data Jay Mace and Qiuqing Zhang 1. Briefly introduce Geoprof-Lidar Product 2. Examine the vertical and horizontal distribution of cloud occurrence
More informationObserved Trends in Wind Speed over the Southern Ocean
GEOPHYSICAL RESEARCH LETTERS, VOL. 39,, doi:10.1029/2012gl051734, 2012 Observed s in over the Southern Ocean L. B. Hande, 1 S. T. Siems, 1 and M. J. Manton 1 Received 19 March 2012; revised 8 May 2012;
More informationHow 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
More informationOn Surface fluxes and Clouds/Precipitation in the Tropical Eastern Atlantic
On Surface fluxes and Clouds/Precipitation in the Tropical Eastern Atlantic Chris Fairall, NOAA/ESRL Paquita Zuidema, RSMAS/U Miami with contributions from Peter Minnett & Erica Key AMMA Team Meeting Leeds,
More informationMcIDAS Activities Within The NASA Langley Research Center Clouds And Radiation Group
McIDAS Activities Within The NASA Langley Research Center Clouds And Radiation Group Kristopher Bedka Science Systems and Applications Inc @ NASA LaRC In Collaboration With (in alphabetical order) J. K.
More informationBoundary layer parameterization and climate. Chris Bretherton. University of Washington
Boundary layer parameterization and climate Chris Bretherton University of Washington Some PBL-related climate modeling issues PBL cloud feedbacks on tropical circulations, climate sensitivity and aerosol
More informationSouthern Hemisphere jet latitude biases in CMIP5 models linked to shortwave cloud forcing
GEOPHYSICAL RESEARCH LETTERS, VOL.???, XXXX, DOI:10.1029/, 1 2 Southern Hemisphere jet latitude biases in CMIP5 models linked to shortwave cloud forcing Paulo Ceppi, 1 Yen-Ting Hwang, 1 Dargan M. W. Frierson,
More informationCoupling between clouds and their environment: using observations to constrain models
Coupling between clouds and their environment: using observations to constrain models Louise Nuijens ECMWF Annual Seminar 2015 Brian Medeiros, Irina Sandu and Maike Alhgrimm Photograph: Frederic Batier
More informationUnderstanding land-surfaceatmosphere. observations and models
Understanding land-surfaceatmosphere coupling in observations and models Alan K. Betts Atmospheric Research akbetts@aol.com MERRA Workshop AMS Conference, Phoenix January 11, 2009 Land-surface-atmosphere
More informationAn Annual Cycle of Arctic Cloud Microphysics
An Annual Cycle of Arctic Cloud Microphysics M. D. Shupe Science and Technology Corporation National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado T. Uttal
More informationAtmospheric Boundary Layer over Land, Ocean, and Ice. Xubin Zeng, Michael Brunke, Josh Welty, Patrick Broxton University of Arizona
Atmospheric Boundary Layer over Land, Ocean, and Ice Xubin Zeng, Michael Brunke, Josh Welty, Patrick Broxton University of Arizona xubin@email.arizona.edu 24 October 2017 Future of ABL Observations Workshop
More informationThe Atmospheric Boundary Layer. The Surface Energy Balance (9.2)
The Atmospheric Boundary Layer Turbulence (9.1) The Surface Energy Balance (9.2) Vertical Structure (9.3) Evolution (9.4) Special Effects (9.5) The Boundary Layer in Context (9.6) What processes control
More informationTrends in Climate Teleconnections and Effects on the Midwest
Trends in Climate Teleconnections and Effects on the Midwest Don Wuebbles Zachary Zobel Department of Atmospheric Sciences University of Illinois, Urbana November 11, 2015 Date Name of Meeting 1 Arctic
More informationCONSTRAIN proposal for grey zone model comparison case. Adrian Hill, Paul Field, Adrian Lock, Thomas Frederikse, Stephan de Roode, Pier Siebesma
CONSTRAIN proposal for grey zone model comparison case Adrian Hill, Paul Field, Adrian Lock, Thomas Frederikse, Stephan de Roode, Pier Siebesma Contents Introduction CONSTRAIN Overview of UM Limited Area
More informationSensitivity of zonal-mean circulation to air-sea roughness in climate models
Sensitivity of zonal-mean circulation to air-sea roughness in climate models Inna Polichtchouk & Ted Shepherd Royal Meteorological Society National Meeting 16.11.2016 MOTIVATION Question: How sensitive
More informationAn Observational Study of the Relationship between Cloud, Aerosol and Meteorology in Marine Stratus Regions
An Observational Study of the Relationship between Cloud, Aerosol and Meteorology in Marine Stratus Regions Norman G. Loeb NASA Langley Research Center Hampton, VA Oct 18 th, 2006, AeroCom Meeting (Virginia
More informationGEWEX Cloud System Study (GCSS)
GEWEX Cloud System Study (GCSS) The goal of GCSS is to improve the parameterization of cloud systems in GCMs (global climate models) and NWP (numerical weather prediction) models through improved physical
More informationEarth System Modeling & Prediction Processes & Observations
Earth System Modeling & Prediction Processes & Observations The ESMP/P&O programmes in the Deep South National Science Challenge Olaf Morgenstern 1 & Adrian McDonald 2 1 NIWA, Wellington 2 U. Canterbury,
More informationHow well do we know the climatological characteristics of the North Atlantic jet stream? Isla Simpson, CAS, CDG, NCAR
How well do we know the climatological characteristics of the North Atlantic jet stream? Isla Simpson, CAS, CDG, NCAR A common bias among GCMs is that the Atlantic jet is too zonal One particular contour
More informationDiagnosing Model Systematic Error for Clouds and Precipitation
Diagnosing Model Systematic Error for Clouds and Precipitation Richard Forbes (ECMWF) With Thanks to Maike Ahlgrimm, Peter Bechtold, Martin Köhler and ECMWF colleagues, and Graeme Stephens (CSU), Julien
More informationMonitoring Climate Change from Space
Monitoring Climate Change from Space Richard Allan (email: r.p.allan@reading.ac.uk twitter: @rpallanuk) Department of Meteorology, University of Reading Why Monitor Earth s Climate from Space? Global Spectrum
More informationImpact of Eurasian spring snow decrement on East Asian summer precipitation
Impact of Eurasian spring snow decrement on East Asian summer precipitation Renhe Zhang 1,2 Ruonan Zhang 2 Zhiyan Zuo 2 1 Institute of Atmospheric Sciences, Fudan University 2 Chinese Academy of Meteorological
More informationArctic bias improvements with longwave spectral surface emissivity modeling in CESM
Arctic bias improvements with longwave spectral surface emissivity modeling in CESM Chaincy Kuo1, Daniel Feldman1, Xianglei Huang2, Mark Flanner2, Ping Yang3, Xiuhong Chen2 1Lawrence Berkeley National
More informationThe skill of ECMWF cloudiness forecasts
from Newsletter Number 143 Spring 215 METEOROLOGY The skill of ECMWF cloudiness forecasts tounka25/istock/thinkstock doi:1.21957/lee5bz2g This article appeared in the Meteorology section of ECMWF Newsletter
More informationWhat you need to know in Ch. 12. Lecture Ch. 12. Atmospheric Heat Engine. The Atmospheric Heat Engine. Atmospheric Heat Engine
Lecture Ch. 1 Review of simplified climate model Revisiting: Kiehl and Trenberth Overview of atmospheric heat engine Current research on clouds-climate Curry and Webster, Ch. 1 For Wednesday: Read Ch.
More informationReport to WGNE: Selected GFDL Research Activities
Report to WGNE: Selected GFDL Research Activities GFDL s Atmospheric Model-4 (AM4) Excerpted from a presentation by Chris Golaz at the 2014 American Meteorological Society Annual Meeting, Climate Processes
More informationAnalysis of the Hydrologic Cycle in the Community Atmosphere Model
Meteorology Senior Theses Undergraduate Theses and Capstone Projects 12-1-2017 Analysis of the Hydrologic Cycle in the Community Atmosphere Model Kyle A. Knight Iowa State University Follow this and additional
More informationOn the relationships among cloud cover, mixed-phase partitioning, and planetary
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 On the relationships among cloud cover, mixed-phase partitioning, and planetary albedo in GCMs Daniel T. McCoy* 1, Ivy Tan 2, Dennis L. Hartmann
More informationAn Overview of Atmospheric Analyses and Reanalyses for Climate
An Overview of Atmospheric Analyses and Reanalyses for Climate Kevin E. Trenberth NCAR Boulder CO Analysis Data Assimilation merges observations & model predictions to provide a superior state estimate.
More informationAn Introduction to Physical Parameterization Techniques Used in Atmospheric Models
An Introduction to Physical Parameterization Techniques Used in Atmospheric Models J. J. Hack National Center for Atmospheric Research Boulder, Colorado USA Outline Frame broader scientific problem Hierarchy
More informationMETEOROLOGY ATMOSPHERIC TELECONNECTIONS: FROM CAUSAL ATTRIBUTION TO STORYLINES OF CIRCULATION CHANGE
METEOROLOGY ATMOSPHERIC TELECONNECTIONS: FROM CAUSAL ATTRIBUTION TO STORYLINES OF CIRCULATION CHANGE Ted Shepherd Grantham Chair of Climate Science Stratosphere-troposphere coupling: stratospheric polar
More informationAMIP-type horizontal resolution experiments with NorESM. Øyvind Seland, Trond Iversen, Ivar Seierstad
AMWG meeting 10th-12th February 2014 AMIP-type horizontal resolution experiments with NorESM Øyvind Seland, Trond Iversen, Ivar Seierstad Motivation: For given a computer resource, ESMs need to balance
More informationInterannual variability of top-ofatmosphere. CERES instruments
Interannual variability of top-ofatmosphere albedo observed by CERES instruments Seiji Kato NASA Langley Research Center Hampton, VA SORCE Science team meeting, Sedona, Arizona, Sep. 13-16, 2011 TOA irradiance
More informationThe EarthCARE mission: An active view on aerosols, clouds and radiation
The EarthCARE mission: An active view on aerosols, clouds and radiation T. Wehr, P. Ingmann, T. Fehr Heraklion, Crete, Greece 08/06/2015 EarthCARE is ESA s sixths Earth Explorer Mission and will be implemented
More informationArctic System Reanalysis Depiction of Arctic Atmospheric Circulation
Arctic System Reanalysis Depiction of Arctic Atmospheric Circulation David H. Bromwich A.B. Wilson, L.-S. Bai, G.W.K. Moore, K.M. Hines, S.-H. Wang, W. Kuo, Z. Liu, H.-C. Lin, T.-K. Wee, M. Barlage, M.C.
More informationUsing Satellite Simulators to Diagnose Cloud-Processes in CMIP5 Models
Using Satellite Simulators to Diagnose Cloud-Processes in CMIP5 Models Stephen A. Klein Program for Climate Model Diagnosis and Intercomparison / LLNL Alejandro Bodas-Salcedo & Mark Webb United Kingdom
More informationCharacterization of the Present-Day Arctic Atmosphere in CCSM4
Characterization of the Present-Day Arctic Atmosphere in CCSM4 Gijs de Boer 1, Bill Chapman 2, Jennifer Kay 3, Brian Medeiros 3, Matthew Shupe 4, Steve Vavrus, and John Walsh 6 (1) (2) (3) (4) ESRL ()
More informationHow surface latent heat flux is related to lower-tropospheric stability in southern subtropical marine stratus and stratocumulus regions
Cent. Eur. J. Geosci. 1(3) 2009 368-375 DOI: 10.2478/v10085-009-0028-1 Central European Journal of Geosciences How surface latent heat flux is related to lower-tropospheric stability in southern subtropical
More informationDiagnosis of Relative Humidity Changes in a Warmer Climate Using Tracers of Last Saturation
Diagnosis of Relative Humidity Changes in a Warmer Climate Using Tracers of Last Saturation 8 March, 2011 Jonathon Wright Department of Applied Mathematics & Theoretical Physics University of Cambridge
More informationMultiple satellite observations of cloud cover in extratropical cyclones
JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES, VOL. 118, 9982 9996, doi:1.12/jgrd.5718, 213 Multiple satellite observations of cloud cover in extratropical cyclones Catherine M. Naud, 1 James F. Booth,
More informationGeneral Circulation. Nili Harnik DEES, Lamont-Doherty Earth Observatory
General Circulation Nili Harnik DEES, Lamont-Doherty Earth Observatory nili@ldeo.columbia.edu Latitudinal Radiation Imbalance The annual mean, averaged around latitude circles, of the balance between the
More informationThe Climatology of Clouds using surface observations. S.G. Warren and C.J. Hahn Encyclopedia of Atmospheric Sciences.
The Climatology of Clouds using surface observations S.G. Warren and C.J. Hahn Encyclopedia of Atmospheric Sciences Gill-Ran Jeong Cloud Climatology The time-averaged geographical distribution of cloud
More informationScale-aware and definition-aware evaluation of CESM1 near-surface precipitation frequency using CloudSat observations
Scale-aware and definition-aware evaluation of CESM1 near-surface precipitation frequency using CloudSat observations Jen Kay, University of Colorado (CU) Tristan L Ecuyer (UW-Madison), Angie Pendergrass
More informationConsequences for Climate Feedback Interpretations
CO 2 Forcing Induces Semi-direct Effects with Consequences for Climate Feedback Interpretations Timothy Andrews and Piers M. Forster School of Earth and Environment, University of Leeds, Leeds, LS2 9JT,
More informationFuture directions for parametrization of cloud and precipitation microphysics
Future directions for parametrization of cloud and precipitation microphysics Richard Forbes (ECMWF) ECMWF-JCSDA Workshop, 15-17 June 2010 Cloud and Precipitation Microphysics A Complex System! Ice Nucleation
More informationCorrespondence between short and long timescale systematic errors in CAM4/CAM5 explored by YOTC data
Correspondence between short and long timescale systematic errors in CAM4/CAM5 explored by YOTC data Hsi-Yen Ma In collaboration with Shaocheng Xie, James Boyle, Stephen Klein, and Yuying Zhang Program
More informationInterannual Variations of Arctic Cloud Types:
Interannual Variations of Arctic Cloud Types: Relationships with Sea Ice and Surface Temperature Ryan Eastman Stephen Warren University of Washington Department of Atmospheric Sciences Changes in Arctic
More informationTranspose-AMIP. Steering committee: Keith Williams (chair), David Williamson, Steve Klein, Christian Jakob, Catherine Senior
Transpose-AMIP Steering committee: Keith Williams (chair), David Williamson, Steve Klein, Christian Jakob, Catherine Senior WGNE - THORPEX-PDP workshop, Zurich, 08/07/10 What is Transpose-AMIP? Basically,
More informationClouds on Mars Cloud Classification
Lecture Ch. 8 Cloud Classification Descriptive approach to clouds Drop Growth and Precipitation Processes Microphysical characterization of clouds Complex (i.e. Real) Clouds Examples Curry and Webster,
More informationImproving the representation of the Greater Arctic with ASRv2. D. H. Bromwich and many collaborators
Improving the representation of the Greater Arctic with ASRv2 D. H. Bromwich and many collaborators 5 th International Conference on Reanalysis (ICR5) Rome, Italy 14 November 2017 Importance of an Arctic-focused
More informationThe Role of Post Cold Frontal Cumulus Clouds in an Extratropical Cyclone Case Study
The Role of Post Cold Frontal Cumulus Clouds in an Extratropical Cyclone Case Study Amanda M. Sheffield and Susan C. van den Heever Colorado State University Dynamics and Predictability of Middle Latitude
More informationHow is precipitation from low clouds important for climate?
How is precipitation from low clouds important for climate? CloudSat estimated precipitation rate from low clouds Low clouds over the SE Pacific, Nov 11 th 2014 Robert Wood, University of Washington With
More informationESA Cloud-CCI Phase 1 Results Climate Research Perspective
ESA Cloud-CCI Phase 1 Results Climate Research Perspective Claudia Stubenrauch Laboratoire de Météorologie Dynamique, France and Cloud-CCI Team Outline Ø Challenges to retrieve cloud properties Ø What
More informationAntarctic Cloud Radiative Forcing at the Surface Estimated from the AVHRR Polar Pathfinder and ISCCP D1 Datasets,
JUNE 2003 PAVOLONIS AND KEY 827 Antarctic Cloud Radiative Forcing at the Surface Estimated from the AVHRR Polar Pathfinder and ISCCP D1 Datasets, 1985 93 MICHAEL J. PAVOLONIS Cooperative Institute for
More informationStandalone simulations: CAM3, CAM4 and CAM5
Standalone simulations: CAM3, and CAM5 CAM5 Model Development Team Cécile Hannay, Rich Neale, Andrew Gettelman, Sungsu Park, Joe Tribbia, Peter Lauritzen, Andrew Conley, Hugh Morrison, Phil Rasch, Steve
More informationCloud feedbacks on dynamics and SST in an equatorial mock-walker circulation
Cloud feedbacks on dynamics and SST in an equatorial mock-walker circulation Equator (f=0) p W Pacific Warm SST x E Pacific Colder SST Ocean heat loss Very cold deep ocean Understand cloud feedbacks on:
More informationCan dust cause droughts?
Can dust cause droughts? Dust and sea surface temperature forcing of the 1930 s Dust bowl Cook et al., GRL 2008 Impact of desert dust radiative forcing on Sahel precipitation: Radiative Importance of dust
More informationShort Term forecasts along the GCSS Pacific Cross-section: Evaluating new Parameterizations in the Community Atmospheric Model
Short Term forecasts along the GCSS Pacific Cross-section: Evaluating new Parameterizations in the Community Atmospheric Model Cécile Hannay, Dave Williamson, Jerry Olson, Rich Neale, Andrew Gettelman,
More informationAssimilation of satellite derived soil moisture for weather forecasting
Assimilation of satellite derived soil moisture for weather forecasting www.cawcr.gov.au Imtiaz Dharssi and Peter Steinle February 2011 SMOS/SMAP workshop, Monash University Summary In preparation of the
More informationMarchand et al. 2008, Comparison of MMF with CloudSat Accepted JGR 05/2008 p. 1. A Comparison of Simulated Cloud Radar Output
Marchand et al. 2008, Comparison of MMF with CloudSat Accepted JGR 05/2008 p. 1 A Comparison of Simulated Cloud Radar Output from the Multiscale Modeling Framework Global Climate Model with CloudSat Cloud
More information