Ocean Modeling Discussion

ckharris

William & Mary's Batten School of Coastal & Marine Sciences & VIMS are seeking applicants for our Research, Academic Inclusion, and Scientific Engagement (RAISE) Post-Doctoral Fellowship Program - https://jobs.wm.edu/postings/62848 . The overarching goal of this program is to create and train the ...

ckharris

I had a similar problem several years ago where we got different solutions depending on how many tiles we used. It turned out to be a bug in the compiler that we were using at the time. The differences went away when we did not use the optimization in the compiler command (the -O3) but then the ...

ckharris

Just curious: when we look at someone's profile in the ROMS forum, we are given the choice to mark them as "Friend" or "Foe". Are there many ROMS Foes out there? What happens if we mark someone as a foe? For example - here is the profile of my colleague (and friend): https://www.myroms.org/forum ...

ckharris

The Virginia Institute of Marine Science (VIMS)/William & Mary’s School of Marine Science invites applications for a full-time, tenure-eligible Associate/Full Professor. The position will begin in Summer 2022. Qualifications: The successful candidate holds an earned doctorate (Ph.D.) or an e ...

ckharris

Sediment processes such as erosion, deposition, and suspended transport impact water quality in shallow water systems such as estuaries and continental shelves. Numerical models provide a means of quantifying the impact of sediment transport on issues such as contaminant transport, and nutrient ...

ckharris

Post-doc Position available: Join our group to work on a numerical modeling project that will couple ROMS (Regional Ocean Modeling System) hydrodynamics and sediment transport with WRF-HYDRO. Seeking motivated candidates who have experience with implementations and model development within ROMS or ...

ckharris

Position: Research Civil Engineer or Environmental/Ocean Scientist U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center Environmental Laboratory Water Quality & Contaminant Modeling Branch Vicksburg, MS Job Summary Perform numerical modeling of sediment and contaminant ...

ckharris

Join our group to work on a numerical modeling project that will couple ROMS (Regional Ocean Modeling System) hydrodynamics and sediment transport with WRF-HYDRO. Seeking motivated candidates who have experience with implementations and model development within ROMS or similar ocean models. The ...

ckharris

Are you accounting for porosity of the sediment bed? If you work in volumetric units, you need to account for porosity of the sediment bed. If you keep everything in mass units (kg/m2) then you do not need to account for porosity of the sediment bed. For the sediment bed, you can use the "sandmass ...

ckharris

CSDMS Fall 2019 Webinar Series Please join us for the final webinar this Fall! "Cohesive and Mixed Sediment Transport Processes in ROMS" The Regional Ocean Modeling System (ROMS) is an open-source regional ocean model with a large user community. The version distributed as part of the Coupled Ocean ...

ckharris

Our group is running a modified version of sed_floc_toy also. The main thing you should see with this test case is sediment flocculation and disaggregation in the water column. So the sediment size distributions in the water column should be changing with flocculation processes. This test case is ...

ckharris

Students and very recent graduates should consider applying for the CSDMS Syvitski Student Modeler Award. CSDMS invites graduate students from earth and computer sciences to compete for the annual “CSDMS Student Modeler Award.” The award is in honor of Jai Syvitski, CSDMS's founding executive dir ...

ckharris

William & Mary’s Virginia Institute of Marine Science (VIMS) seeks a postdoctoral investigator to work with Dr. Courtney Harris in the Department of Physical Sciences. Specifically, the Postdoctoral Research Associate will perform numerical modeling studies to explore sediment geochemical control on ...

ckharris

William & Mary’s Virginia Institute of Marine Science (VIMS) seeks a postdoctoral investigator to work with Dr. Courtney Harris in the Department of Physical Sciences. The successful candidate will work within the sediment modeling group, which uses numerical models to address interdisciplinary i ...

ckharris

HI- I suggest trying to use a constant (steady) river input first until you get the time-stamps right, and see that the freshwater is really entering the estuary.

ckharris

We had a similar problem, and it did lead to months of entertainment as Kate hinted. We found that our problem was actually the compiler, not the source code. We found that whether we got these types of differences depended on the optimization level that we used in compiling; that is we did not get ...

ckharris

The Chesapeake Community Modeling Program (CCMP; http://ches.communitymodeling.org/ ) is sponsoring "ChesMS16" - the Chesapeake Community Modeling Symposium; to be held June 1 - 2, 2016 in Williamsburg VA. Abstracts can be submitted now for the ChesMS16 meeting (Chesapeake Modeling Symposium 2016 ...

ckharris

Interested in numerical models for Chesapeake Bay? Consider leading a session at the upcoming ChesMS-2014, the Chesapeake Community Modeling Program’s Modeling Symposium, called “Chesapeake Frontiers: Modeling the watershed, estuary, living resources and the socio-economic system” Deadline for speci ...

ckharris

Announcing the 12th International Conference on Cohesive Sediment Transport Processes (INTERCOH); University of Florida, Gainesville, Florida; October 21-24, 2013. INTERCOH meetings are dedicated to improving our understanding of the physical processes of cohesive sediment in the natural environment ...

ckharris

Hi I used riverplume2 to teach a class and we added sediment transport to the case. We did not change the downstream boundary condition. But this is how the case works: the grid has two open boundaries that are aligned across the shelf, which are upstream and downstream on a continental shelf. The ...

ckharris

Hi
I recently used riverplume2 for a test case in a class. And, yes, the salinity distribution evolves to look like that. I think to improve it you need to change the downstream open boundary condition for salinity.

Best wishes,
Courtney Harris

ckharris

In response to some email queries; it seemed reasonable to put this on the forum as well. To add biological reactions to the sediment bed: the main thing I’ve done is add a new variable called “bed_tracer” to the sediment model. Like the t() array, “bed_tracer(i,j,k,itrc,nstp)” is 5-d, with i,j, bein ...

ckharris

HI- I have been working to couple the sediment transport and Fennel model within ROMS by adding a diagenetic model within the sediment bed model of ROMS. If you would like to see what we are doing, I can email you my Ocean Sciences 2012 powerpoint. email me if you would like to request it. Other ...

ckharris

A reminder that March 15 is the deadline for abstract submission, and early-bird registration for the ChesMS-12 meeting to be held May 21 – 22, in Annapolis MD. Overall scope and aims of the meeting: The Chesapeake Community Modeling Program (CCMP) seeks to improve modeling tools and related r ...

ckharris

Please consider submitting an abstract regarding modeling of sediment transport to our session: Session 029: Sediment Transport and Deposition in Lakes, Estuaries, and Shallow Shelves Organizers: Nathan Hawley, Great Lakes Environmental Research Laboratory, nathan.hawley@noaa.gov; Courtney K. Harris ...

ckharris

The Department of Physical Sciences at the Virginia Institute of Marine Science of the College of William & Mary, located in Gloucester Point, VA, seeks applicants for tenure-track faculty positions to begin July, 2012. Successful candidates will join a department that focuses on continental margin ...

ckharris

HI There are versions of the code that include biodiffusion and bed consolidation, but I assume neither of these have been approved for distribution in the main trunk. So, defining these "ifdef options" will not result in any changes to the code. If you are accessing the CSTMS svn site, there are ...

ckharris

There is an option to run a cohesive sediment model that is different from the non-cohesive model described in Warner's papers. Chris Sherwood (USGS) has been the main developer of this module, and he would know (better than me) the current state of the module. The cohesive model follows the model ...

ckharris

Question: Is it possible to include a time-series forcing for the surface momentum but neglect the surface heat fluxes? If so, how do I do this? BULK_FLUXES requires a time-series of wind speeds (which I have), but also specification of things that I don't have (air temperature, cloud cover, etc ...

ckharris

Hello The following Ocean Sciences Special Session invites abstract submissions, and is especially relevant to sediment modeling efforts: GO04 Sediment processes I: transport and deposition in lakes, estuaries, coastal bays, and continental shelves The physical characteristics of lakes, estuaries ...

ckharris

In case anyone reads this thread in the future: John and I talked on the phone today and discussed the sediment bed model. We both agree that some of my changes may eventually be worked into the main trunk, but that they should be looked at more closely before doing so. My version now has three ...

ckharris

HI I only have a minute to post this: one plot is bed thickness using standard age dating; and 1mm (0.001 m) NEWLAYER_THICKNESS. I do not get new layers at day 200 when the second depositional cycle begins, even though there is a big gap in age there. The other figure is bed_age relative to the ...

ckharris

HI Thanks for spelling that out. I didn't get the behavior listed in (2), using standard ROMS, though it describes our test case pretty well. Until I changed the dating of the layers to mean the date when a deposit was started, I did not get a new layer during the second cycle of deposition in the ...

ckharris

HI The layers were all initially 0.5 cm thick, and newlayer_thick is also 0.5 cm thick in this testcase. I did have a problem with the initial conditions in that the age of the layers was too old (initialized with an age > model's time(ng)). But, even after I fixed that (now initialize with age of ...

ckharris

HI John thanks for the speedy response. for this test case, we have sediment deposit; then sit there for several days, then erode to a new steady state, stay there for several days, and then redeposit and remain at that state for several days. My cycle of erosion and deposition takes place over many ...

ckharris

HI Could someone remind me how the sediment-bed-age is supposed to work? Is it supposed to be the date when the deposition BEGAN in the layer? or the date when deposition ENDED in the layer? I want my sediment layers to be <~ NEWLAYER_THICK; and needed to change the age dating during depositional ...

ckharris

2010 Ocean Sciences Meeting - Call for Sessions "From Observation to Prediction in the 21st Century" is the theme for the 2010 Ocean Sciences Meeting which will be held February 22-26, 2010 in Portland Oregon. The Call for Sessions has just been posted - submissions are due May 29, 2009. For more ...

ckharris

HI

Is anyone working on implementing shrink-wrapping in ROMS so that calculations are not performed at land cells? We have a model grid that has 90,000 grid points, but only 20,000 are water. It is an estuarine environment that has some long tidal channels.

thanks
courtney

ckharris

HI What values are essential to getting a model grid that works? We want to run ROMS in the York River, Virginia. We got a copy of a good HEM3D grid from J.I. Kwan, and want to convert it to a ROMS grid file. HEM3D, however, does not seem to need to know anything about grid cells that are land so we ...

ckharris

HI I've gotten a version of the code that runs on a Linux Opteron-based cluster, but can not get it to run on our solaris Opteron-based cluster. Does anyone have success running ROMS 2.2 on Solaris with MPI. If so, which FFLAGS do you use? We are using the Sun compiler, mpif90 (on our system under ...

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