The Great Plains Low-Level Jet in MERRA-2
Explore the source record for details and available documents.
Anthony M DeAngelis↗
Engineering topics
Siegfried D Schubert
Publications and source records attributed to Siegfried D Schubert.
Ocean-Land Teleconnections and Chaotic Atmospheric Variability in Climate Models, with Implications for Real-World Behavior
This study introduces a unique approach to estimating a fundamental but unmeasurable property of Nature: ρo 2 , the fraction of the variance of a given meteorological variable that is determined by boundary forcing (specifically, SSTs) as opposed to chaotic atmospheric dynamics. Here, we focus on continental monthly-averaged near-surface air temperature, or T2M. Rather than determining the fractions of SST-explained T2M variance found for a specific atmospheric general circulation model (AGCM) and then assuming that these fractions also represent Nature, we perform an analysis that entails: (i) evaluating a specific AGCM’s ability to capture observed variability with an infinite number of ensemble members, (ii) quantifying the degree to which different modeling systems agree on SST-land teleconnections, and (iii) combining these results into our novel estimates of ρo 2 . The derived ρo 2 fields suggest, with caveats, that AGCMs tend to overestimate the fraction of explained T2M variance (the signal-to-total variance ratio) in the Tropics.
Randal D Koster↗
MJO in NASA’s new S2S forecast model: MJO propagation associated with moist dynamics and coupling with stratosphere controlled by QBO
This presentation covers two main points: it presents the performance of the GEOS-S2S model system in capturing the MJO propagation in relation to 1) moist dynamics and 2) MJO-QBO relationship, both of which are essential for accurately representing the MJO as it crosses the MC.
Young-Kwon Lim↗