Cooperative Institute for Research in Environmental Sciences

Hamlington-Milliff Group

Hamlington-Milliff Group


Earth-observing satellite data provide multi-scale perspectives on atmosphere-ocean systems in both global and regional contexts. Our research exploits the volume and precision of multi-platform data in conjunction with in-situ data and process models for particular phenomena in the earth system. Using methodologies like Bayesian Hierarchical Models (BHMs) and Cyclostationary Empirical Orthogonal Functions (CSEOFs), we test the limits of satellite and in-situ measurements of the atmosphere and ocean. In particular, we seek to develop and implement techniques that use satellite data in novel and innovative ways to obtain a better understanding of the earth system. Sample research includes sea-level reconstructions based on multi-variate historical datasets, regional and global ensemble surface wind dataset construction, ocean forecast model error analyses, Madden-Julian Oscillation studies, and tsunami detection and monitoring using satellite remote sensing.

Projects

Past Projects

Uncertainty Management in Coupled Physical-Biological Lower Trophic Level Ocean Ecosystem Models

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Modeling 3-D spatio-temporal biogeochemical processes with a forest of 1-D statistical emulators.

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"Trends in sunspots and North Atlantic sea level pressure.

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Ocean ensemble forecasting. Part II: Mediterranean Forecast System response.

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Dominant spatial variability scales from observations around the Hawaiian Islands.

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Ocean ensemble forecasting. Part I: Ensemble Mediterranean winds from a Bayesian hierarchical model

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Title: Improving sea level reconstructions using non-sea level measurements
Author(s): Hamlington, B. D.; Leben, R. R.; Kim, K. -Y.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 117 Article Number: C10025 DOI: 10.1029/2012JC008277 Published: OCT 31 2012

Title: Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami?
Author(s): Hamlington, B. D.; Leben, R. R.; Godin, O. A.; et al.
Source: GEOPHYSICAL RESEARCH LETTERS Volume: 39 Article Number: L15605 DOI: 10.1029/2012GL052386 Published: AUG 8 2012

Title: Regional Sea Level Reconstruction in the Pacific Ocean
Author(s): Hamlington, B. D.; Leben, R. R.; Wright, L. A.; et al.
Source: MARINE GEODESY Volume: 35 Special Issue: SI Supplement: 1 Pages: 98-117 DOI: 10.1080/01490419.2012.718210 Published: 2012

Title: Reconstructing sea level using cyclostationary empirical orthogonal functions
Author(s): Hamlington, B. D.; Leben, R. R.; Nerem, R. S.; et al.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 116 Article Number: C12015 DOI: 10.1029/2011JC007529 Published: DEC 13 2011

Title: Seasat and Geosat Revisited: Using Sea Level Measurements to Improve Satellite Altimeter Orbits
Author(s): Leben, R. R.; Hamlington, B. D.; Haines, B. J.
Source: JOURNAL OF THE ASTRONAUTICAL SCIENCES Volume: 58 Issue: 3 Special Issue: SI Pages: 479-493 Part: 2 Published: JUL-SEP 2011

Title: The Effect of Signal-to-Noise Ratio on the Study of Sea Level Trends
Author(s): Hamlington, B. D.; Leben, R. R.; Nerem, R. S.; et al.
Source: JOURNAL OF CLIMATE Volume: 24 Issue: 5 Pages: 1396-1408 DOI: 10.1175/2010JCLI3531.1 Published: MAR 1 2011

Title: Detection of the 2010 Chilean tsunami using satellite altimetry
Author(s): Hamlington, B. D.; Leben, R. R.; Godin, O. A.; et al.
Source: NATURAL HAZARDS AND EARTH SYSTEM SCIENCES Volume: 11 Issue: 9 Pages: 2391-2406 DOI: 10.5194/nhess-11-2391-2011 Published: 2011

Title: Variations in sea surface roughness induced by the 2004 Sumatra-Andaman tsunami
Author(s): Godin, O. A.; Irisov, V. G.; Leben, R. R.; et al.
Source: NATURAL HAZARDS AND EARTH SYSTEM SCIENCES Volume: 9 Issue: 4 Pages: 1135-1147 Published: 2009

Milliff Publications:

Uncertainty Management in Coupled Physical-Biological Lower Trophic Level
Ocean Ecosystem Models
R.F. Milliff, J. Fiechter, W.B. Leeds, R. Herbei, C.K. Wikle, M.B. Hooten, A.M. Moore, T.M. Powell, and J. Brown. 2013. Oceanography 26(4):98–115, http://dx.doi.org/10.5670/oceanog.2013.78.

Title: A Bayesian parameter estimation method applied to a marine ecosystem model for the coastal Gulf of Alaska
Author(s): Fiechter, J.; Herbei, R.; Leeds, W.; et al.
Source: ECOLOGICAL MODELLING Volume: 258 Pages: 122-133 DOI: 10.1016/j.ecolmodel.2013.03.003 Published: JUN 10 2013

Title: Modeling 3-D spatio-temporal biogeochemical processes with a forest of 1-D statistical emulators
Author(s): Leeds, W. B.; Wikle, C. K.; Fiechter, J.; et al.
Source: ENVIRONMETRICS Volume: 24 Issue: 1 Pages: 1-12 DOI: 10.1002/env.2187 Published: FEB 2013

Title: Trends in sunspots and North Atlantic sea level pressure
Author(s): van Loon, Harry; Brown, Jeremiah; Milliff, Ralph F.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES Volume: 117 Article Number: D07106 DOI: 10.1029/2012JD017502 Published: APR 11 2012

Title: Dominant spatial variability scales from observations around the Hawaiian Islands
Author(s): Matthews, Dax; Powell, Brian; Milliff, Ralph
Source: DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS Volume: 58 Issue: 10 Pages: 979-987 DOI: 10.1016/j.dsr.2011.07.004 Published: OCT 2011

Title: Ocean ensemble forecasting. Part I: Ensemble Mediterranean winds from a Bayesian hierarchical model
Author(s): Milliff, Ralph F.; Bonazzi, Alessandro; Wikle, Christopher K.; et al.
Source: QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY Volume: 137 Issue: 657 Pages: 858-878 DOI: 10.1002/qj.767 Part: B Published: APR 2011

Title: Ocean ensemble forecasting. Part II: Mediterranean Forecast System response
Author(s): Pinardi, Nadia; Bonazzi, Alessandro; Dobricic, Srdjan; et al.
Source: QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY Volume: 137 Issue: 657 Pages: 879-893 DOI: 10.1002/qj.816 Part: B Published: APR 2011

Title: Near real-time ocean circulation assimilation and prediction in the Intra-Americas Sea with ROMS
Author(s): Powell, B. S.; Moore, A. M.; Arango, H. G.; et al.
Source: DYNAMICS OF ATMOSPHERES AND OCEANS Volume: 48 Issue: 1-3 Pages: 46-68 DOI: 10.1016/j.dynatmoce.2009.04.001 Published: OCT 2009

Title: A Spatio-Temporal Model for Mean, Anomaly, and Trend Fields of North Atlantic Sea Surface Temperature Comment
Author(s): Wikle, C. K.; Milliff, R. F.
Source: JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION Volume: 104 Issue: 485 Pages: 22-23 DOI: 10.1198/jasa.2009.0027 Published: MAR 2009

Title: Stochastic Forcing of Ocean Variability by the North Atlantic Oscillation
Author(s): Chhak, Kettyah C.; Moore, Andrew M.; Milliff, Ralph F.
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 39 Issue: 1 Pages: 162-184 DOI: 10.1175/2008JPO3972.1 Published: JAN 2009

Title: Composite Life Cycle of Maritime Tropical Mesoscale Convective Systems in Scatterometer and Microwave Satellite Observations
Author(s): Mapes, Brian; Milliff, Ralph; Morzel, Jan
Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 66 Issue: 1 Pages: 199-208 DOI: 10.1175/2008JAS2746.1 Published: JAN 2009

Title: QuikSCAT Impacts on Coastal Forecasts and Warnings: Operational Utility of Satellite Ocean Surface Vector Wind Data
Author(s): Milliff, Ralph F.; Stamus, Peter A.
Source: WEATHER AND FORECASTING Volume: 23 Issue: 5 Pages: 878-890 DOI: 10.1175/2008WAF2007081.1 Published: OCT 2008

Title: 4DVAR data assimilation in the Intra-Americas Sea with the Regional Ocean Modeling System (ROMS) (vol 23, pg 130, 2008)
Author(s): Powell, B. S.; Arango, H. C.; Moore, A. M.; et al.
Source: OCEAN MODELLING Volume: 25 Issue: 3-4 Pages: 172-172 DOI: 10.1016/j.ocemod.2008.08.001 Published: 2008

Title: 4DVAR data assimilation in the Intra-Americas Sea with the Regional Ocean Modeling System (ROMS)
Author(s): Powell, B. S.; Arango, H. G.; Moore, A. M.; et al.
Source: OCEAN MODELLING Volume: 25 Issue: 3-4 Pages: 173-188 DOI: 10.1016/j.ocemod.2008.08.002 Published: 2008

Title: 4DVAR data assimilation in the Intra-Americas Sea with the Regional Ocean Modeling System (ROMS)
Author(s): Powell, B. S.; Arango, H. G.; Moore, A. M.; et al.
Source: OCEAN MODELLING Volume: 23 Issue: 3-4 Pages: 130-145 DOI: 10.1016/j.ocemod.2008.04.008 Published: 2008

Title: Generalized quasi-geostrophy for spatially anisotropic rotationally constrained flows
Author(s): Julien, K; Knobloch, E; Milliff, R; et al.
Source: JOURNAL OF FLUID MECHANICS Volume: 555 Pages: 233-274 DOI: 10.1017/S002112006008949 Published: MAY 25 2006

Title: Stochastic forcing of the North Atlantic wind-driven ocean circulation. Part I: A diagnostic analysis of the ocean response to stochastic forcing
Author(s): Chhak, KC; Moore, AM; Milliff, RF; et al.
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 36 Issue: 3 Pages: 300-315 DOI: 10.1175/JPO2852.1 Published: MAR 2006

Title: Stochastic forcing of the North Atlantic wind-driven ocean circulation. Part II: An analysis of the dynamical ocean response using generalized stability theory
Author(s): Chhak, KC; Moore, AM; Milliff, RF; et al.
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 36 Issue: 3 Pages: 316-334 DOI: 10.1175/JPO2853.1 Published: MAR 2006

Title: A state-space model for ocean drifter motions dominated by inertial oscillations
Author(s): Bengtsson, T; Milliff, R; Jones, R; et al.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 110 Issue: C10 Article Number: C10015 DOI: 10.1029/2004JC002850 Published: OCT 14 2005

Title: Resonant inertial oscillations in moored buoy ocean surface winds
Author(s): Stockwell, RG; Large, WG; Milliff, RF
Source: TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY Volume: 56 Issue: 5 Pages: 536-547 DOI: 10.1111/j.1600-0870.2004.00086.x Published: OCT 2004

Title: Wind stress curl and wind stress divergence biases from rain effects on QSCAT surface wind retrievals
Author(s): Milliff, RF; Morzel, J; Chelton, DB; et al.
Source: JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY Volume: 21 Issue: 8 Pages: 1216-1231 DOI: 10.1175/1520-0426(2004)021<1216:WSCAWS>2.0.CO;2 Published: AUG 2004

Title: Satellite measurements reveal persistent small-scale features in ocean winds
Author(s): Chelton, DB; Schlax, MG; Freilich, MH; et al.
Source: SCIENCE Volume: 303 Issue: 5660 Pages: 978-983 DOI: 10.1126/science.1091901 Published: FEB 13 2004

Title: Winds from a Bayesian hierarchical model: Computation for atmosphere-ocean research
Author(s): Hoar, TJ; Milliff, RF; Nychka, D; et al.
Source: JOURNAL OF COMPUTATIONAL AND GRAPHICAL STATISTICS Volume: 12 Issue: 4 Pages: 781-807 DOI: 10.1198/1061860032616 Published: DEC 2003

Title: Deep convection in the Irminger Sea forced by the Greenland tip jet
Author(s): Pickart, RS; Spall, MA; Ribergaard, MH; et al.
Source: NATURE Volume: 424 Issue: 6945 Pages: 152-156 DOI: 10.1038/nature01729 Published: JUL 10 2003

Title: Hierarchical Bayesian approach to boundary value problems with stochastic boundary conditions
Author(s): Wikle, CK; Berliner, LM; Milliff, RR
Source: MONTHLY WEATHER REVIEW Volume: 131 Issue: 6 Pages: 1051-1062 DOI: 10.1175/1520-0493(2003)131<1051:HBATBV>2.0.CO;2 Published: JUN 2003

Title: The Southern Oscillation in the early 1990s
Author(s): van Loon, H; Meehl, GA; Milliff, RF
Source: GEOPHYSICAL RESEARCH LETTERS Volume: 30 Issue: 9 Article Number: 1478 DOI: 10.1029/2002GL016307 Published: MAY 9 2003

Title: Mesoscale correlation length scales from NSCAT and Minimet surface wind retrievals in the Labrador Sea
Author(s): Milliff, RF; Niiler, PP; Morzel, J; et al.
Source: JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY Volume: 20 Issue: 4 Pages: 513-533 DOI: 10.1175/1520-0426(2003)20<513:MCLSFN>2.0.CO;2 Published: APR 2003

Title: Bayesian hierarchical modeling of air-sea interaction
Author(s): Berliner, LM; Milliff, RF; Wikle, CK
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 108 Issue: C4 Article Number: 3104 DOI: 10.1029/2002JC001413 Published: APR 1 2003

Title: Spatiotemporal hierarchical Bayesian modeling: Tropical ocean surface winds
Author(s): Wikle, CK; Milliff, RF; Nychka, D; et al.
Source: JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION Volume: 96 Issue: 454 Pages: 382-397 DOI: 10.1198/016214501753168109 Published: JUN 2001

Title: The global distribution of the time-average wind stress curl from NSCAT
Author(s): Milliff, RF; Morzel, J
Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 58 Issue: 2 Pages: 109-131 DOI: 10.1175/1520-0469(2001)058<0109:TGDOTT>2.0.CO;2 Published: 2001

Title: Surface wind variability on spatial scales from 1 to 1000 km observed during TOGA COARE
Author(s): Wikle, CK; Milliff, RF; Large, WG
Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 56 Issue: 13 Pages: 2222-2231 DOI: 10.1175/1520-0469(1999)056<2222:SWVOSS>2.0.CO;2 Published: JUL 1 1999

Title: Ocean general circulation model sensitivity to forcing from scatterometer winds
Author(s): Milliff, RF; Large, WG; Morzel, J; et al.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 104 Issue: C5 Pages: 11337-11358 DOI: 10.1029/1998JC900045 Published: MAY 15 1999

Title: Quasi-stationary wave variability in NSCAT winds
Author(s): Milliff, RF; Hoar, TJ; van Loon, H; et al.
Source: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS Volume: 104 Issue: C5 Pages: 11425-11435 DOI: 10.1029/1998JC900087 Published: MAY 15 1999

Title: Scatterometer winds composited according to the phase of tropical intraseasonal oscillations
Author(s): Madden, RA; Hoar, TJ; Milliff, RF
Source: TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY Volume: 51 Issue: 2 Pages: 263-272 DOI: 10.1034/j.1600-0870.1999.t01-2-00007.x Published: MAR 1999

Title: Basin-scale, high-wavenumber sea surface wind fields from a multiresolution analysis of scatterometer data
Author(s): Chin, TM; Milliff, RF; Large, WG
Source: JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY Volume: 15 Issue: 3 Pages: 741-763 DOI: 10.1175/1520-0426(1998)015<0741:BSHWSS>2.0.CO;2 Published: JUN 1998

Title: Part I Stratified, rotating turbulence: Disciplinary overviews - Preface
Author(s): Charbonneau, P; Herring, J; Milliff, R
Source: THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS Volume: 11 Issue: 3-4 Pages: 137-138 Published: JUN 1998

Title: Fast, eastward-moving disturbances in the surface winds of the equatorial Pacific
Author(s): Milliff, RF; Hoar, TJ; Madden, RA
Source: TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY Volume: 50 Issue: 1 Pages: 26-41 DOI: 10.1034/j.1600-0870.1998.00003.x Published: JAN 1998

Title: The general circulation responses of high-resolution North Atlantic Ocean models to synthetic scatterometer winds
Author(s): Milliff, RF; Large, WG; Holland, WR; et al.
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 26 Issue: 9 Pages: 1747-1768 DOI: 10.1175/1520-0485(1996)026<1747:TGCROH>2.0.CO;2 Published: SEP 1996

Title: The existence and vertical structure of past, eastward-moving disturbances in the equatorial troposphere
Author(s): Milliff, RF; Madden, RA
Source: JOURNAL OF THE ATMOSPHERIC SCIENCES Volume: 53 Issue: 4 Pages: 586-597 DOI: 10.1175/1520-0469(1996)053<0586:TEAVSO>2.0.CO;2 Published: FEB 15 1996

Title: THE EVOLUTION OF BOUNDARY PRESSURE IN OCEAN BASINS
Author(s): MILLIFF, RF; MCWILLIAMS, JC
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 24 Issue: 6 Pages: 1317-1338 DOI: 10.1175/1520-0485(1994)024<1317:TEOBPI>2.0.CO;2 Published: JUN 1994

Title: STRUCTURE AND DYNAMICS OF THE RHODES GYRE SYSTEM AND DYNAMIC INTERPOLATION FOR ESTIMATES OF THE MESOSCALE VARIABILITY
Author(s): MILLIFF, RF; ROBINSON, AR
Source: JOURNAL OF PHYSICAL OCEANOGRAPHY Volume: 22 Issue: 4 Pages: 317-337 DOI: 10.1175/1520-0485(1992)022<0317:SADOTR>2.0.CO;2 Published: APR 1992

Title: A MODIFIED CAPACITANCE MATRIX-METHOD TO IMPLEMENT COASTAL BOUNDARIES IN THE HARVARD OPEN OCEAN MODEL
Author(s): MILLIFF, RF
Source: MATHEMATICS AND COMPUTERS IN SIMULATION Volume: 31 Issue: 6 Pages: 541-564 DOI: 10.1016/0378-4754(90)90060-V Published: FEB 1990

Title: A NOTE ON CONSISTENT QUASI-GEOSTROPHIC BOUNDARY-CONDITIONS IN PARTIALLY OPEN, SIMPLY AND MULTIPLY CONNECTED DOMAINS
Author(s): PINARDI, N; MILLIFF, RF
Source: DYNAMICS OF ATMOSPHERES AND OCEANS Volume: 14 Issue: 1-2 Pages: 65-76 DOI: 10.1016/0377-0265(89)90005-5 Published: DEC 1989

Title: THE SIGNIFICANCE OF POTENTIAL-DENSITY REGRESSIONS
Author(s): GOODCHILD, MF; MILLIFF, RF; DAVIS, SM
Source: PROFESSIONAL GEOGRAPHER Volume: 33 Issue: 3 Pages: 341-349 DOI: 10.1111/j.0033-0124.1981.00341.x Published: 1981

Ralph F. Milliff is teaching ATOC 6020 at the University of Colorado in Fall 2013. The Oceanography Seminar meets Mondays 4-5pm in Duane Physics, E126.

The schedule is here

The official course webpage is here

Members of Hamlington-Millif Group

Address

Hamlington-Milliff Group
Unviersity of Colorado Boulder
216 UCB
Boulder, CO 80309-0216

Benjamin Dillon Hamlington
Email
Phone: 303-735-0483

Ralph Milliff
Email
Phone: 303-492-3013

Lesley Louel Smith
Email
Phone: 303-735-0483

Contact

Hamlington-Milliff Group
Unviersity of Colorado Boulder
216 UCB
Boulder, CO 80309-0216

Benjamin Dillon Hamlington
Email 
Phone: 303-735-0483

Ralph Milliff
Email
Phone: 303-492-3013

Lesley Louel Smith
Email
Phone: 303-735-0483