MJO Focus TeamFrom Mitch MoncrieffDate February 12, 2007 Hello CMMAP Team, The research part of CMMAP has been re-organized into four new themes with four Break-out Groups. Our Break-out Group, called 'Focus on the MJO' is charged with the task of improving knowledge of mesoconvective-to-large scale organization of convection in the MJO, and improving its representation in global weather/climate models. A draft white paper on the MJO Focus Theme (attached) indicates that the MJO is indeed a lively topic. Our Break-Out group aims to perform new simulations, as well a analyze existing simulations and make a CMMAP contribution to MJO science. Please bring your ideas to the Break-out Group during the Kauai meeting or email us prior the meeting. Thanks in advance, Mitch Moncrieff and Marat Khairoutdinov, MJO Focus Theme Break-out Group Co-leaders From Mitch Moncrieff Date February 12, 2007 Those interested in the MJO Focus Theme, According to the CMMAP Agenda, the Break-out Groups (BOGs) have (2 + 2 + 1 = 5 hours) of talk/discussion time. Basically, the action item for the MJO BOG at Kauai is to define focal research areas and complete the White Paper which should probably be called a "Green Paper" since it's not set in stone! For example, Section 3 - Analysis strategy (i.e., simulations, possibilities for reductionism, new approaches; Section 4- Numerical experimentation strategy (e.g., new simulations). We would like to spend BOG time as constructively as possible, so here's a suggestion: The first 2-hr slot will devoted to invited talks and discussion of MJO properties/behavior/issues in the MMF(s) -- superparameterized models and in global CRMs. Others will have the opportunity to provide input sometime in the 5 hours. In order to get the ball rolling and, especially, to find where we stand with simulation/analysis, the following are invited to give short presentations (15 min) in the first BOG session: 1) CMMAP MMF (Marat Khairoutdinov) 2) Global CRM (Hiroaki Miura ) 3) Analysis of MJO realizations (Charlotte DeMott) 4) Possible application of new CLIVAR MJOWG Metrics to MMF (Duane Waliser) Suggestions will be very welcome, Best wishes, Mitch and Marat From Wei-Kuo Tao Date February 13, 2007 Hi Mitch Attached is a joint paper by CSU MMF, JPL and NASA MMF group submitted to JGR in December 2006. Both CSU MMF and Goddard MMF showed: Realistic diurnal variation of precipitation was simulated from local to regional and global (oceanic and continental) scales. Realistic rainfall patterns were simulated for two different climate regimes/years (1998 and 1999). Better MJO characteristics (propagation and strength) were simulated for both 1998 and 1999. High and low cloud amounts were improved. Identified possible mechanisms for the "great red spots" simulated in both the CSU and Goddard MMFs. However, there are differences between the Goddard and CSU coupled systems.For example, the CSU system simulated less rainfall over land than its parent GCM. This is why the CSU system simulated less global rainfall than its parent GCM. The Goddard system, however, overestimates global rainfall because of its oceanic component. It would be a good idea to analyze the results from two MMFs more details. For example, we could examine the MMF's response to ocean process and visversa, and their consequence on the organization and development of the MJO (land may also contribute the development and organization tropical convective systems) Just a thought and see you all in a week. Tao MMF-JGR.doc From Hiroaki Miura Date February 13, 2007 Dear Dr. Moncrieff and Dr. Khairoutdinov, Thank you for giving me a chance to talk about our recent progress. A simulation of MJO in this winter was just started a few weeks ago. The simulation was initialized at 2006-12-15 00Z using data from NCEP. Only 16-days integration has been finished with a 14-km grid mesh. The attatched PPT shows time changes of OLR from NOAA (daily mean) and the simulation (1.5 hr mean). Enhancement of the convective activity over the maritime continents (27DEC-) was simulated even after 10 days from the initial. Slow eastward propagation of the signal seems to be represented in the simulation although the convective activity over the eastern part of the Indian ocean was too weak. I am very happy if our results can help your discussion. Comments and suggestions are very welcome. Regards, Hiroaki MIURA |