Record Details
| Improved Intraseasonal Variability in the NASA GEOS AGCM with 2-moment Microphysics and a Shallow Cumulus Parameterization | |||||||
| NTRS Full-Text: | Click to View [PDF Size: 8.10 MB] | ||||||
| Author and Affiliation: |
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| Abstract: | Weather and climate models have long struggled to realistically simulate the Madden-Julian Oscillation (MJO). Here we present a significant improvement in MJO simulation in NASA's GEOS atmospheric model with the implementation of 2-moment microphysics and the UW shallow cumulus parameterization. Comparing ten-year runs (2007-2016) with the old (1mom) and updated (2mom+shlw) model physics, the updated model has increased intra-seasonal variance with increased coherence. Surface fluxes and OLR are found to vary more realistically with precipitation, and a moisture budget suggests that changes in rain reevaporation and the cloud longwave feedback help support heavy precipitation. Preliminary results also show improved MJO hindcast skill. | ||||||
| Publication Date: | Dec 11, 2017 | ||||||
| Document ID: |
20170011698
(Acquired Dec 14, 2017)
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| Subject Category: | METEOROLOGY AND CLIMATOLOGY | ||||||
| Report/Patent Number: | GSFC-E-DAA-TN50425 | ||||||
| Document Type: | Oral/Visual Presentation | ||||||
| Meeting Information: | American Geophysical Union (AGU) 2017 Fall Meeting; 11-15 Dec. 2017; New Orleans, LA; United States | ||||||
| Meeting Sponsor: | American Geophysical Union; Washington, DC, United States | ||||||
| Contract/Grant/Task Num: | NNG11HP16A | ||||||
| Financial Sponsor: | NASA Goddard Space Flight Center; Greenbelt, MD, United States | ||||||
| Organization Source: | NASA Goddard Space Flight Center; Greenbelt, MD, United States | ||||||
| Description: | 1p; In English | ||||||
| Distribution Limits: | Unclassified; Publicly available; Unlimited | ||||||
| Rights: | Copyright; Public use permitted | ||||||
| NASA Terms: | ATMOSPHERIC MODELS; CLIMATE MODELS; FEEDBACK; RAIN; HINDCASTING; MOISTURE; PRECIPITATION (METEOROLOGY); MADDEN-JULIAN OSCILLATION; SIMULATION; VARIABILITY; PARAMETERIZATION | ||||||
| Other Descriptors: | MADDEN-JULIAN OSCILLATIO | ||||||