ECCO Town Hall at 2018 AGU Fall Meeting

Synopsis: The ECCO consortium will host a town hall at the AGU Fall Meeting in Washington, DC. We will introduce the latest global ocean and sea-ice state estimate Version 4 Release 3 (ECCO v4 Release 3). Release 3 of the ECCO state estimate synthesizes nearly all extant in-situ and remotely-sensed ocean and sea-ice data covering the period 1992 – 2015, with a nominal 1-degree horizontal resolution configuration of the MIT general circulation model (MITgcm) over the entire globe.

By design, ECCO state estimates conserve heat, salt, volume and momentum—a virtue that is critical for analyzing causal mechanisms of ocean variability, and detecting climate signals that are small residuals of large regional anomalies. Instructional material will be provided for analyzing different aspects of the state estimate, including budget analysis, along with instructions for downloading and running the ocean model to recreate the solution. In addition, a selection of recent science applications will be highlighted. Members of the ECCO Group will be available to answer questions and provide guidance on utilizing the products.

Date & Time: Monday, 10 December 2018: 12:30 - 13:30
Location: Marriott Marquis, 901 Massachusetts Avenue NW, Washington DC 20001
Room: Liberty L

ECCO Summer School 2019

Synopsis: The Consortium for "Estimating the Circulation and Climate of the Ocean" (ECCO) will host a summer school for graduate students and early career scientists on global ocean state estimation in support of climate research. The school introduces the tools and mathematics of ocean state and parameter estimation and their application to ocean science through a mix of foundational lectures, hands-on tutorials, and projects. In doing so, the school aims to help nurture the next generation of oceanographers and climate scientists in the subject matter so that they may utilize the ECCO products and underlying modeling/estimation tools most effectively to further advance the state-of-the-art in ocean state estimation and ocean science.

Topics covered: Data assimilation (global & regional); state & parameter estimation; adjoint method; sensitivity analysis; algorithmic differentiation; ocean modeling; ocean dynamics and variability; global ocean observing system; physics of sea level; sea ice physics; ice sheet-ocean interactions; ice shelf dynamics; ocean tides; cyberinfrastructure & data analytics

Dates: May 19–31, 2019

Location: Friday Harbor Laboratories, University of Washington, Friday Harbor, WA

Application Deadline: December 17, 2018

For more information, confirmed lecturers, and how to apply, please visit:

September 2017 — Paper available analyzing subpolar North Atlantic Ocean heat content change

The subpolar North Atlantic (SPNA) reversed trends in ocean heat content from warming during 1994–2004 to cooling over 2005–2015. ECCO V4r3 reveals that this reversal is the result of anomalous horizontal midlatitude gyre circulation acting on the mean temperature gradient, rather than changes in overturning circulation. Results have implications for decadal predictability.

Piecuch, C. G., R. M. Ponte, C. M. Little, M. W. Buckley, and I. Fukumori (2017), Mechanisms underlying recent decadal changes in subpolar North Atlantic Ocean heat content, Journal of Geophysical Research: Oceans, 122(9), 7181-7197, doi:10.1002/2017JC012845.

For more details:

July 2017 — ECCO version 4 release 3 (ECCO-V4r3), covering 1992-2015, now available online

The new release 3 extends the Version 4 estimate using additional observations. The product also incorporates improvements in modeling and estimation. A summary document describes details of the changes. Also available are descriptions of how to evaluate property budgets and how to reproduce the results and generate additional fields using MITgcm.

June 2017 — A new 20-yr ECCO climatology is now available online

ECCO version 4 has been used to calculate a uniform 20-year climatology as a time-mean over the period 1994-2013. The climatology is readily accessible as Matlab files. Associated pictorial atlas and descriptions are available in the DSpace@MIT ECCO Community Collection long-term archive. So far these include:

  • A Twenty-Year Dynamical Oceanic Climatology: 1994-2013. Part 1: Active Scalar Fields: Temperature, Salinity, Dynamic Topography, Mixed-Layer Depth, Bottom Pressure. (2017-03-20)
  • A Twenty-Year Dynamical Oceanic Climatology: 1994-2013. Part 2: Velocities, Property Transports, Meteorological Variables, Mixing Coefficients. (2017-06-14)

  • May 2016 — Joint ECCO-Production and ECCO-IcES Meeting at MIT

    The ECCO-Production and ECCO-IcES groups will hold a joint project meeting at MIT from 16-18 May 2016. A preliminary meeting agenda is now available online

    March 2016 — ECCO version 4, release 2 (ECCO v4r2) now available online

    As compared with the earlier release, ECCO v4-r2 benefits from a few additional corrections as documented in this note. ECCO v4-r2 (see products) further includes the full suite of observational inputs and forcing fields, as well as an interpolated version of the state estimate fields (on a half degree lat-lon grid). The ECCO v4 model settings (see model) have also been simplified to facilitate re-runs of the state estimate solution. This capability allows any user to generate model output that may not be available online (see the ECCO version 4 user guide)

    May 2015 [UPDATED March 2016] — Paper available describing ECCO version 4, release 1 (ECCO v4r1) in details

    Following the release in February 2014 (See products) of a new-generaption, global, bi-decadal state estimate (ECCO version 4, release 1), a paper has been published and highlighted in Geoscientific Model Development that provides a detailed description of the model and estimation configuration, the observational data streams, and basic properties of the solution: Forget, G., J.M. Campin, P. Heimbach, C.N. Hill, R.M. Ponte, and C. Wunsch, 2015: ECCO version 4: an integrated framework for non-linear inverse modeling and global ocean state estimation. Geosci. Model Dev., 8, 3071-3104, doi:10.5194/gmd-8-3071-2015

    February 2014 — Announcing a new-generation, global, bi-decadal state estimate: ECCO version 4

    Following the ECCO meeting in January at MIT, the JPL/MIT/AER ECCO-Production team is happy to announce the release of a new-generation, global, bi-decadal state estimate (ECCO-Production, release 1). The product covers the period 1992 to 2011.

    Several aspects of this new product have been highlighted already during the ECCO meeting. To re-iterate, some of the features include a fully global grid (LLC90) with the inclusion of the Arctic Ocean, telescoping from 1 to 1/3 deg. in the tropics, a doubling in vertical resolution (from 23 to 50 levels), forcing with the ERA-Interim atmospheric reanalysis, and improved treatment of data sets in terms of resolved vs. unresolved scales. The state estimate is being made available on its native grid on the DODS/OPeNDAP server

    The sub-directory ancillary_data/ has some extra information, including our standard analysis (standardAnalysis.pdf) that documents model-data misfits and physical variables of general interest. A copy of the matlab codes used to generate the standard analysis is also provided (gcmfaces_MITprof_r1.tar). As with releases of previous estimates, we think that many aspects of this release are mature (and improvements from previous versions), but with further improvements of some aspects to be expected in subsequent releases.

    Gael Forget has played a leading role in developing ECCO v4 and producing the released estimate. [UPDATE 2015:] A more detailed paper describing the design of ECCO v4, and the solution is available at: Forget, G., J.M. Campin, P. Heimbach, C.N. Hill, R.M. Ponte, and C. Wunsch, 2015: ECCO version 4: an integrated framework for non-linear inverse modeling and global ocean state estimation. Geosci. Model Dev., 8, 3071-3104, doi:10.5194/gmd-8-3071-2015

    February 2010 — ECCO-GODAE to be featured at AGU Ocean Science 2010 Town Hall Meeting

    The National Oceanographic Partnership Program (NOPP) will hold a Town Hall meeting during OS 2010, entitled: Ocean Partnerships: Collaborative Oceanographic Research for the Future. One of the projects featured will be ECCO-GODAE. The meeting takes place on Tuesday, February 23rd, from 11:45 to 12:45 in room D139.

    August 2009 — Editors' Highlight in GRL

    Work by R.M. Ponte and K.J. Quinn on Bottom pressure changes around Antarctica and wind-driven meridional flows was picked as Editors' Highight in the Geophysical Research Letters' recent volume 36..

    June 2009 — A new ECCO-GODAE solution

    The MIT/AER ECCO-GODAE project issued a new solution of its recent version 3 system. The new solution uses atmospheric state fields as control variables in conjunction with an adjoint of the Large and Yeager surface boundary layer scheme, as well as a dynamic/thermodynamical sea-ice model. The solution has been update through the end of 2007 (calculations through end of 2008 are under way). The new solution is available via ECCO's LAS server at MIT.

    December 2008 — ECCO session at AGU Fall Meeting 2008

    AGU's Fall Meeting 2008 will feature an ECCO session, identified as OS04: CLIVAR/GODAE: The ECCO State Estimates. This session will provide an opportunity for ECCO product users to (a) describe the scientific implications of their results, (b) enhance the feedback from the broader community to the Consortium, (c) foster the interaction between ECCO members and other scientists who utilize the state estimates. The oral part (OS41F) will take place on Thursday, Dec. 18th, starting 8am in MW Room 2022. It is preceded by a poster session (OS31C) on Wednesday, Dec. 17th, starting 8am, in MC Hall D.

    September 2008 — An eddy-permitting Southern Ocean State Estimate (SOSE)

    As part of his Ph.D. thesis, Matt Mazloff has produced an eddy-permitting state estimate at 1/6 degree horizontal resolution of the Southern Ocean, covering the Argo-rich period 2005/06. The adjoint-based solution is dynamically consistent and enables closed budget calculations of various quantities. Matt's thesis was featured in the SDSC Thread Newsletter, and more recently in WHOI's Oceanus magazine (Corralling the Wild and Wooly Southern Ocean).

    May 2007 — 50 year GECCO solution made available online

    A fifty year state estimate covering 1950 to 2000 is now available on the ECCO LAS server at SDSC The estimate was produced by the "German ECCO" (GECCO) group at the University of Hamburg The product is described in Koehl, A., D. Dommenget, K. Ueyoshi, D. Stammer, The Global ECCO 1952 to 2001 Ocean Synthesis Report No.40, March 2006.

    May 2007 — New ECCO web page goes live

    In collaboration with web designer Colleen Boisvert ECCO has launched a new overall project web site. Main purpose of this site is to provide an integrated view of ECCO and it's follow-on projects (ECCO-GODAE, ECCO2, GECCO, ...). It is hoped that readers will get a clear understanding of ECCO's various activities, and will find among ECCO's various ocean state estimation products those which best suit their needs. We welcome any feedback you may wish to provide.

    March 2007 — Ocean model captures diversity of marine microbes

    Scientists at MIT have developed a new marine ecosystem model that allows its populations of phytoplankton to realistically evolve, reflecting the diversity in populations in the natural world. This should lead to a better understanding of the coupling between ocean and atmospheric chemistry. The model makes use of ECCO's ocean state estimate to capture the physical environment in which the ecosystem evolves. The study "Emergent Biogeography of Microbial Communities in a Model Ocean"  by Michael J. Follows, Stephanie Dutkiewicz, Scott Grant, and Sallie W. Chisholm was published in today's issue of Science magazine. It is part of the MIT Darwin Project and funded by the Gordon and Betty Moore Foundation.
    (Click here for a related MIT News Story)

    March 2007 — ECCO products now hosted on SDSC's SRB archive

    In a collaboration between the San Diego Supercomputing Center (SDSC) and ECCO, a large part of the ECCO products have been transfered to SDSC's Datacentral and managed via Storage Resource Broker (SRB). To make these data available to the community via different commonly used servers and software tools, including DODS/OPeNDAP and LAS, SDSC's DataCentral specialist Roman Olschanowsky and MIT's Constantinos Evangelinos successfully implemented DODS/OPeNDAP on top of SRB. The SRB system allows fast and easy data access across various disk and tape resources while ensuring archiving/backup capability. High speed access to the SDSC data using the SRB client tools is also available.

    December 2006 — Carl Wunsch awarded the 2006 William Bowie Medal by the American Geophysical Union

    On December, 13, 2006, AGU awarded the Bowie Medal to Carl Wunsch "For his wide-ranging research in the study of the ocean and its roles in shaping Earth's climate and its changes, and for unselfish cooperation in the field of physical oceanography."  Read Citation

    November 2006 — Elephant seals serving ECCO

    A unique set of roughly 320,000 individual sub-surface measurements of salinity (conductivity), temperature, and depth (CTD) taken by elephant seals which carried bio-logging and telemetry devices was added to the ECCO state estimation system as new observational constraints. The data were kindly provided by the "Southern Elephant Seals as Oceanographic Samplers" (SEaOS) project involving the University of St. Andrew's NERC Sea Mammal Research Unit (SMRU) and the British Antarctic Survey. The uniqueness of the data derives from the ability of seals to go under the sea-ice which covers large parts of the Southern Ocean poleward of 60S during austral winter and where in-situ data are not available otherwise.

    August 2006 — NAS Teamwork Helps Researchers Cruise Through Ocean Data

    As part of his Ph.D. thesis, Matt Mazloff has produced an eddy-permitting state estimate at 1/6 degree horizontal resolution of the Southern Ocean, covering the Argo-rich period 2005/06. The adjoint-based solution is dynamically consistent and enables closed budget calculations of various quantities. Matt's thesis was featured in the SDSC Thread Newsletter, and more recently in WHOI's Oceanus magazine (Corralling the Wild and Wooly Southern Ocean).

    April 2006 — ECCO puts focus on Southern Ocean

    In a collaboration with the San Diego Computer Center (SDSC) ECCO embarks on producing a Southern Ocean state estimate based on the adjoint method. After successfully tackling technical difficulties in setting up an adjoint model at 1/6 degree horizontal resolution which can run efficiently on 600 pocessors of SDSC's IBM Power-4 "DataStar" production has begun by fitting the MIT general circulation model (MITgcm) to a variety of observation during the year 2004. The work led by MIT's Matthew Mazloff was featured in the April 2006 issue of the SDSC Nuggets magazine ("Predicting the State of the Ocean") and Issue 4,  Febbruary  2006 of SDSC Thread ("Estimating the State of the Southern Ocean") by Matthew Mazloff.

    February 2006 — IT Struggles with Climate Change

    In a news story for the Computerworld magazine talks about current limitations in computing horsepower for climate simulations. (Click here for the full story)