RCEMIP Updates

September 3, 2020

I have several brief updates:

1) Thanks to DKRZ, the RCEMIP dataset now has a permanent identifier! hdl:21.14101/d4beee8e-6996-453e-bbd1-ff53b6874c0e Please use this when linking to or citing the data.

2) The RCEMIP overview paper has been published in JAMES! https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020MS002138 Thank you to my 40 co-authors for your contributions. The final formatted version is expected to be posted very soon.

3) The AGU special collection on “Using radiative-convective equilibrium to understand convective organization, clouds, and tropical climate” is open and already has 4 papers in it! Don’t forget that all RCE papers (not just RCEMIP) are welcome and encouraged for inclusion.

4) Many of you may be interested in the 2020 Virtual CFMIP Meeting on Clouds, Precipitation, Circulation, & Climate Sensitivity, to be held virtually 14-17 September 2020 at 8 AM MDT (10 AM EDT/2 PM UTC). The registration deadline is September 7 (next Monday). There are great sessions planned on 1) Updates on CFMIP and the WCRP Climate Sensitivity Assessment 2) Does convective organization matter for climate? 3) Does atmosphere-ocean coupling matter for climate? And 4) Do extratropical cloud feedbacks matter for climate?. Speakers include Steven Sherwood, Mark Webb, Yen-Ting Hwang, Sandrine Bony, Natalie Burls, Kyle Armour, Jennifer Kay, Johannes Mulmenstadt and myself. I will be sharing a few RCEMIP results in my talk!

May 10, 2020

I am pleased to announce that the RCEMIP data is now publicly available! The standardized RCEMIP output is hosted by the German Climate Computing Center (DKRZ) and is publicly available at https://swiftbrowser.dkrz.de/public/dkrz_70a517a8-039d-4a1b-a30d-841923f8bc7a/RCEMIP/. RCEMIP is a collection of more than 30 different models including GCMs, SCMs, CRMs, GCRMs, and LES, configured in radiative-convective equilibrium. More information about the project can be found here, more information about the protocol can be found in the RCEMIP protocol paper (Wing et al. 2018), and more information about scientific results can be found here. The RCEMIP overview paper is currently in review at JAMES.

While the RCEMIP organizers and model contributors have various analyses in progress and planned, there are many questions that can be investigated using the RCEMIP data so we strongly encourage others to make use of this unique dataset! We'd like to keep track of who is using the data for what, both to try to avoid duplication of research efforts and help promote work that uses the RCEMIP data. We will list your paper/presentation on the RCEMIP website, which will also help advertise it. Therefore, when you download RCEMIP data we ask that you fill out this brief form to keep us in the loop.

I’d also like to announce a special collection across several AGU journals, including JAMES, GRL, ESS, and JGR Atmospheres titled Using radiative-convective equilibrium to understand convective organization, clouds, and tropical climate. Submissions are open now through 31 December 2021. Submissions that use the RCEMIP data and/or protocol are particulary encouraged but all RCE studies are eligible for inclusion. The call for papers is as follows:

Radiative-convective equilibrium (RCE) is a time-honored idealization of the tropical atmosphere suitable for studying basic questions in climate science and accessible to a wide range of model types. This special collection consists of studies that employ RCE frameworks to better understand convective organization, clouds, and tropical climate. This includes questions about the role of convective organization in modulating climate sensitivity, changes in cloudiness with warming, controls on convective organization, and the representation of the equilibrium climate. Studies using results from the RCE model intercomparison project (RCEMIP), an ensemble of more than 30 models of many types following a standard protocol, or that employ the RCEMIP protocol, are especially encouraged.

Please feel free to forward this information to any others that may be interested in contributing to the special collection or using the RCEMIP data.

September 20, 2019

Dear RCEMIP model contributors,

Would you please fill out the following form to clarify what quantity you uploaded for the cloud water - related variables in RCEMIP - clw_avg, clwvi_avg, clwvi, and clw? CLICK HERE FOR FORM

Technically, the 1D and 3D variables clw_avg and clw should have been cloud liquid water, while the 0D and 2D variables clwvi_avg and clwvi should have been condensed water path - that is, the column integral of the sum of cloud liquid water and cloud ice. This was described in the CMIP6 documentation for the variables clw and clwvi (from which I based the RCEMIP output specification). However, I realize that it was potentially confusing that clw means something different than clwvi, and want to make sure I have accurate information about what was uploaded for each variable. At this time, it is perfectly fine whether you uploaded cloud liquid water or cloud liquid + cloud ice for clwvi, I just need to know which you did!

Therefore, I've created the form to get information from each of you about what quantity you uploaded under each variable name, to ensure that we have accurate information and can interpret the output unambiguously. Thank you for your quick response!

July 25, 2019

I recently returned from Italy, where we had a very successful summer school on Convective Organization and Climate Sensitivity at the ICTP. During the first week of the summer school, our excellent group of more than 80 students from around the world spent some time analyzing the RCEMIP simulations. The students were divided into small groups, each of who investigated one model. They examined the evolution to RCE, energy balance, and self-aggregation in the simulations. We challenged the students to come up with and apply their own metric for aggregation, and we were impressed with the creative ideas that they had. In the second week, the students presented the results of their analysis, which was very useful for us to get an overview of what the RCEMIP simulations looked like (they also found a few output bugs :-P). Stay tuned in the coming months for more results from the summer school.

Remember that you can find information about the models who have contributed to RCEMIP, data usage guidelines, and a list of known output bugs on the RCEMIP website http://myweb.fsu.edu/awing/rcemipsims.html.

I also wanted to remind you that there are several RCEMIP-relevant convection sessions at the AMS Annual Meeting and the AGU Fall Meeting to which I would encourage you to submit abstracts. The session descriptions are below.

AMS Annual Meeting: “Tropical Convection” Jointly Hosted by the Symposium on Tropical Meteorology and Tropical Cyclones and the Eighth Symposium on the Madden-Julian Oscillation and Sub-Seasonal Monsoon Variability. Abstract deadline: Thursday August 1. Tropical convection, through its control of tropical cloud cover, humidity, and rainfall, is important for both tropical weather and tropical and global climate variability. Organized tropical convection, on a variety of scales, is of particular importance in this regard. Yet important scientific and technical gaps remain in our ability to understand and simulate tropical convection, particularly with regards to the coupling between dynamics and diabatic processes. Contributions are encouraged from theoretical, modeling, and observational studies that address any aspect of tropical shallow and deep convective dynamics, including convective organization, diurnal variations, local circulations (island, sea-breeze, etc..), interactions with the large-scale environment and tropical weather phenomena, and the role of tropical convection in climate.

AGU Fall Meeting: A013 - Atmospheric Convection: Processes, Dynamics, and Links to Weather and Climate. Abstract deadline: Wednesday July 31. In spite of the important role convection plays in the climate system, many uncertainties remain owing to the wide variety of processes and scales involved. Processes on the smallest scales of turbulence and microphysics connect through dynamics and radiation to both weather and climate, locally through precipitation and hazardous weather, and more broadly through feedbacks on global circulations and the climate system. Improving our understanding of clouds and convection at a process level, their representation in large-scale models, and the ability to forecast related hazards remains an outstanding challenge. This session aims to explore aspects of boundary layer, shallow, and deep convective clouds, considering fundamental processes as well as links to self-aggregation, land surface interactions, and their role in weather and climate. We invite presentations of both observational and modeling studies (including those related to the Radiative-Convective Equilbrium Model Intercomparison Project).

May 16, 2019

Just a reminder that the deadline for abstract submission to the CFMIP meeting in Mykonos, Greece (September 30-October 4) is in one week (May 24)! There is an opportunity for us to have an RCEMIP breakout at the meeting and we would like RCEMIP to have a significant presence at CFMIP. I hope to see many of you there!

In addition, I wanted to bring to your attention that there will be a tropical convection session in the Tropical Meteorology and Tropical Cyclones Symposium at the AMS Annual Meeting in January 2020 in Boston, MA. That session could be a great venue to present RCEMIP-related work for those of you thinking of attending AMS.

April 5, 2019

I wanted to bring to your attention the call for abstracts for the CFMIP meeting on Clouds, Precipitation, Circulation, and Climate Sensitivity, to be held September 30 - October 4, 2019 in Mykonos, Greece. As you may know, RCEMIP is an “informal” MIP affiliated with CFMIP and the objectives of RCEMIP are closely aligned with the goals of CFMIP.

I strongly encourage you to consider submitting an abstract on your RCEMIP-related work to the CFMIP meeting, so that we can maintain the great momentum that RCEMIP has right now and follow-up on the preliminary results that were presented at UCP in Berlin. As noted in the CFMIP call for abstracts below, the role of organization of convection in climate and results from RCEMIP are explicitly highlighted, and we hope that there will be a significant presence of RCEMIP at CFMIP. In addition, there is also the opportunity for us to have a RCEMIP breakout session during one of the evenings of CFMIP to facilitate further discussion and planning.

For more information, visit conference website. The deadline for abstract submission is May 24, 2019.

March 14, 2019

It was great to see many of you in Berlin a few weeks ago, at the UCP conference. In general attendees seemed to be excited and intrigued by the opportunities presented by RCEMIP. We are busy working on analyzing the results, and so I urge those of you who have not yet submitted your simulations to please do so as soon as possible.

LES Simulations: While in Berlin, a small group of us got together and settled on a configuration for LES simulations to be performed as a subset/branch of RCEMIP. We have commitments from 4 models so far to perform these simulations: SAM (Marty Singh), CM1 (George Bryan), ICON (Tobias Becker), MicroHH (Chiel van Heerwaarden). We welcome participation from other groups - if you are interested in performing LES simulations with your model, please contact me. The configuration guide can be found here and the vertical grid here, and the time frame for completion is by *May*.

January 5, 2019

Happy New Year! It was a pleasure seeing many of you at the AGU Fall Meeting in Washington, DC a few weeks ago. We had an excellent session in which some results from RCEMIP and other RCE simulations were presented, and we had an brief meeting to provide updates on the project and coordinate plans for analysis and publication. Those updates, along with a few others, are summarized below. Please forgive the long email.

  1. The deadline for completing RCEMIP simulations has passed (December 31). I am excited that results from 14 models have been uploaded! I have spoken to several others in recent weeks and know that more simulations are expected to be uploaded soon. Even though the deadline has passed, if you are working on your simulations, please continue to do so and upload them as soon as they are complete.

    If you haven’t spoken to me about your timeline for uploading your simulations, please do so. We will continue to accept data after the deadline, but the longer it takes, we cannot guarantee that results from your model will be included in the RCEMIP overview paper. If you are still working on submitting your simulations, please be mindful to follow the format described in the data archive instructions and in my October update, and to also upload the model documentation form.

  2. Publication plans/procedures:
    • Overview paper: We are planning an overview paper of the basic results from all models contributing to RCEMIP, led by myself and the other RCEMIP organizers. This will tentatively include basic analysis of the RCE state across the spectrum of models, the changes in clouds with warming, and the robustness of self-aggregation. My timeline to complete this paper is within the next year. Most of the analysis going into this paper will be completed by myself, my graduate student, and Kevin Reed (we have an NSF grant to support this), but if you would specifically like to contribute analysis to it, let me know. Everyone who has submitted results that are included in the paper will be invited to be co-authors - you do not need to do any analysis to be included, but I will ask you to to at least read the draft of the paper and provide suggestions. I anticipate that an appendix of the paper will include the documentation details of all the contributing models.
    • Subsequent papers using the RCEMIP simulations or a subset of them (by you or anyone else) will need to reference the GMD protocol paper, the overview paper, and the DKRZ for data storage/access. Co-authors should include those who wrote the paper and did analysis; it is not necessary to include those that completed the simulations.
    • Papers you might write about your own simulations, that come out before the overview paper: Please keep me involved and aware of your work, so that we make sure not to overlap. Such papers should be more about the specifics of your model than we would get into in the overview paper.
    • Papers you might write using data from models other than your own, that come out before

      the overview paper: Please consider inviting the contributors of those other model simulations as co-authors on your paper, and keep me involved and aware of your work, so that we make sure not to overlap.

  3. Data access: Currently the DKRZ swift cloud where the RCEMIP simulations are stored is only accessible to those submitting simulations who have requested an account. Once all the simulations that we expect are uploaded, we will create a public url for the cloud server where anyone (regardless of whether you submitted simulations) can browse, download and use data (with proper citation). I probably will wait until the spring to “release” the data to the public.

  4. I have posted a list of the models that have contributed to RCEMIP (and those expected to do so shortly) on the RCEMIP website. If you are still planning on submitting simulations and your name/model is not on this list, please get in touch. I know there are others who expressed interest/willingness in contributing, but I am not sure of your status if your name is not on the list below.

Thank you all for your hard work and willingness to take part in this project! As I think our AGU session showed, we are already starting to have interesting results and I expect many more to come! As always, please contact me with any questions.

October 2, 2018

Thank you to those of you that have completed your model simulations and uploaded them to the DKRZ cloud! We have some output from 4 different models up there now and I’ve started to take a preliminary look at it. Things look very promising, but I have realized that a couple of our data handling specifications were not as clear as they could have been. Here are some clarifications and other updates: (the 4 of you that have already uploaded simulations, don’t worry about changing things)

  1. What we have been calling “1D” output is made of up variables that are only a function of time f(t) and variables that are functions of vertical level and time f(z,t). They were separated by a horizontal line in Table 4 in the paper. From now on, we will refer to the f(t) variables as 0D output, and the f(z,t) variables as 1D output. Accordingly, there should be separate data files written for the 0D and 1D variables, and they should be placed in separate pseudofolders (labeled 0D and 1D) on the DKRZ cloud. The SCALE and dam model outputs on the DKRZ cloud are good examples of what the output structure should look like.
  2. Please remember to fill out the model documentation form. and also upload it to the DKRZ cloud when you upload your data. You can place it in the pseudofolder corresponding to the name of your model (it will then be visible next to the pseudofolders for each experiment).
  3. The time coordinate in your output file should be in units of days since the beginning of the simulation.
  4. If your model does not employ pressure levels (i.e., it uses height levels or a type of hybrid level), please also output the domain- and time-mean values of pressure on your model levels, for approximate plotting purposes. Ideally this would be included in all files, but it is especially useful in the 1D files.
  5. For the cloud fraction variables (1D variable cldfrac_avg and 2D variable cl), please output these as a fraction (between 0 and 1), not a percentage out of 100.
  6. As a reminder, the deadline for submitting output is December 31, 2018.
  7. Our session inspired by RCEMIP at the AGU Fall Meeting ( “A058 Insights on Clouds, Convection, and Climate Sensitivity from Idealized Modeling Studies”) will have poster presentations (A23K, poster numbers 1762-1778) from 1:40-6 pm on Tuesday December 11 in hall A-C and oral presentations (A34F) on Wednesday December 12 from 4-6 pm in room 152A. Please join us!
  8. The data archive instructions and output clarification files have been updated to reflect these clarifications

August 14, 2018

I hope you have all had a great summer! I thought it was time to provide a few updates about RCEMIP.

  1. Our nominal deadline for simulation completion is September 2018. I’ve heard from many of you that you are working on configuring your model and completing the RCEMIP simulations, so I know that you are making progress! But I also know that it might take a little bit more time - I myself need to rerun my SAM simulations because I missed a few output variables the first time! So please do your best to get things finished in September, but we will accept contributions through the end of the year (December 31, 2018).
  2. For those of you that have completed your simulations, we have prepared instructions on how to upload your data. Thank you to DKRZ and MPI-M for hosting the RCEMIP data on the DKRZ cloud, where it will be publicly available! The instructions are attached, and are also available on the RCEMIP website (http://myweb.fsu.edu/awing/rcemip.html). Also attached is a form to fill out to document the model simulations that you are submitting (as a fillable pdf and as a Word document) - please fill that out and upload it as a pdf to the DKRK cloud as well (in the pseudofolder for your model). If you have any technical questions about the DKRZ cloud, contact Karsten Peters (peters@dkrz.de).
  3. Regarding the output, there have been a couple of clarifications and corrections, which I have been keeping up to date on the RCEMIP website (current version here) As a reminder, the 1D and 2D output are to be hourly averages that are uploaded for the entire simulation. The 3D output, however, is to be instantaneous 6-hourly snapshots, and only the last 25 days of output are to be uploaded. Please do your best to output all the listed RCEMIP variables, but if there are any that are excessively difficult or impossible, please just let me know.
  4. We have convened a session inspired by RCEMIP at the AGU Fall Meeting (A058: “Insights on Clouds, Convection, and Climate Sensitivity from Idealized Modeling Studies”). Thank you to all that have submitted abstracts, and we encourage you to all attend what we hope will be a great session! Stay tuned for more program details.

Thank you all for your participation in this exciting project!

May 8, 2018

One further clarification: There was an error in the definition of frozen moist static energy in section 4.2.2 (including equations 7 and 8). Please see here for the correct definition - make sure you are using the correct definition when diagnosing the FMSE budget. I apologize if this has caused any confusion - I am not sure how I missed it in the proof stage. The correction is also posted on the RCEMIP website and the official paper will be corrected as soon as possible.

April 25, 2018

I wanted to get in touch and provide a few updates about RCEMIP.

  1. As I noted in my previous email, we would ideally like the simulations complete by the fall - September 2018. We understand that it might take some time for everyone to set up and complete their simulations, but that should be your initial goal in terms of a deadline.
  2. To provide some motivation to complete the simulations and encourage groups to perform preliminary analysis, we have proposed a session to be held at the AGU Fall Meeting in December 2018. I’ll send more information about that if the session proposal is accepted, but it would be about “Insights on Clouds, Convection, and Climate Sensitivity from Idealized Modeling Studies”. We hope to have a session at EGU next April as well, and eventually, an RCEMIP workshop.
  3. We will follow-up soon with information on how to upload your simulation output to the data archive.
  4. A couple clarifications on the output specification can be found here.

February 26, 2018

I wanted to provide an update on the status of RCEMIP. I am pleased to announce that the protocol paper has been accepted in Geoscientific Model Development (doi:10.5194/gmd-2017-213). The final version has not yet appeared on the GMD website, but can be found here and is attached for your convenience. There have been a few minor changes to the simulation design and specification, so please refer to the final version of the paper when configuring your simulations. You will also find useful information and resources on our website. Our vision of RCEMIP is that the simulations we describe in the paper are only a starting point. One of our goals is to foster a community of RCE modelers and hope that there will be subsequent experimentation, informed by the initial results and the interests of the participants.

Thank you to those that have filled out the RCEMIP Registration Form. Based on the initial responses, we have about 10 models of various types committed and an additional 10 tentatively set to participate, but we would like there to be more! If you plan to participate in RCEMIP and have not yet filled out the registration form, please do so as soon as possible. If you filled out the form previously with a “maybe” and are now able to commit to participating, please fill it out again. There is no hard deadline for confirming your participation, but we would ideally like the simulations to be complete by Fall 2018 (as a motivation, we plan to convene a RCE session at the AGU Fall Meeting in December).

*IMPORTANT*: This will be the last email that I send to this broad distribution list, so if you want to continue to receive updates and/or plan to participate in RCEMIP, please fill out the RCEMIP Registration Form

Again, thank you for your support of this project, and please feel free to contact me (awing at fsu.edu) with any questions you may have.

September 19, 2017

I am pleased to announce RCEMIP, which is an intercomparison of models configured in radiative-convective equilibrium (RCE). RCE is an idealization that has long been used to study basic questions in climate science; however, assessing the formulaic sensitivity of simulations of RCE is hindered by the absence of a common baseline. Arising from discussions at the WCRP Model Hierarchies Workshop, we have designed RCEMIP to include a wide variety of models configured in RCE and to address the following three themes:

  1. What is the response of clouds to warming and what is the climate sensitivity of RCE?
  2. What is the dependence of the degree of aggregation of conovection and tropical circulation regimes on temperature?
  3. What is the robustness of the RCE state, cloud feedbacks, and aggregation across the spectrum of models?

We believe that RCEMIP is poised to make progress on some of the biggest open questions in climate dynamics and the simple premise of RCE will allow the results to be connected to theory, as well as serve as a useful framework for model development and evaluation. RCEMIP distinguishes itself from many intercomparisons because of its ability to involve many model types. Therefore, we ask you to please consider participating in this exciting project! We encourage participation from both modeling centers and individual researchers and welcome contributions of simulations from cloud-resolving models, general circulation models, global cloud-resolving models, and single column models.

The RCEMIP protocol is described in a paper that is currently in review at Geosci. Model Dev., and is available here, with interactive discussion until 14 Nov 2017. The paper is also attached for your convenience.

More information can be found on our website, at http://myweb.fsu.edu/awing/rcemip.html. In particular, if you are interested in participating in RCEMIP, please fill out the following form (also linked on the website): RCEMIP Registration Form. You are also welcome to contact me (awing at fsu.edu) or any of the other organizers (listed below and cc’d) with any questions you may have. In addition, please feel free to forward this message to any other individuals who may be interested in participating.

We thank you in advance for your support and participation in this project!

RCEMIP Organizers:

Allison A. Wing (Florida State University), Kevin A. Reed (Stony Brook University), Masaki Satoh (University of Tokyo), Bjorn Stevens (Max Planck Institute for Meteorology), Sandrine Bony (LMD/IPSL/CNRS), Tomoki Ohno (JAMSTEC)

Questions? Email awing at fsu.edu